Finally, hydrogen is passed over the catalyst at 350 C. for 12 hours. CORE - Aggregating the world's open access research papers It can be seen that very high temperatures, above 800 C., are required to raise the equilibrium conversion of ethylene above 70%. (Pdf) Metrics for Evaluating Ethylene Production Using Oxidative Ethylene Production | Lummus Technology A typical ceramic reactor has cylindrical membrane wall thickness of about 5 microns on a 1.5-2 millimeter thick support layer. Similarly, the stream 39 passing through the annulus flows through a bubbling flow meter indicated at 40. Note flow controller 28 and valve 29 in series with line 30; flow controller 31 and valve 32 in series with line 33; and flow controller 34 and valve 35 in series with line 36. Ethylene Polymerization Processes and Manufacture of Polyethylene. Figure 1: Global ethylene and propylene capacity (2017) and growth (CAGR) by production process EthylenePropylene Note: Size of the bubbles indicates relative share of capacities by process technology. It is also used in antifreeze applications and in pharmaceuticals and cosmetics. In ethylene production, a hydrocarbon feed stream mixed with steam enters a tubular reactor where, under controlled conditions, the . 5 shows use of multiple reactors, in accordance with the invention; and. A predetermined amount of the strips are placed into a first mold unit, which is heated . a) providing a generally tubular, highly porous, asymmetric, ceramic membrane, and providing a heated reaction zone in a container into which the membrane is received. /Type /Page It is also used in hydraulic brake fluids and inks used in stamp pads, ballpoint pens, and print shops. Though there are a variety of methods to produce ethylene, a primary method is steam cracking - when hydrocarbons and steam are heated to 750-950C. Download Ethylene Production Plant Design copy PDF for free. /Length 14 0 R The membrane reactor is shown as enclosed in a heated metal tube 13, the whole assembly being maintained at 400-600 C., as by an electrical heater 14, or other means. Crop yields will improve. f) controlling the flow of said inlet and outlet streams to maintain a differential pressure between said inlet stream of alkane or mixture of alkanes, and said outlet hydrogen stream, of between 10 and 100 psi. >> The process for dehydrogenating ethane to produce ethylene, that includes. endobj c) and passing an inlet stream of ethane carrying hydrogen in the range of 0.1% to 20% by volume into contact with the treated membrane, at one side thereof at elevated temperature between 300 and 800 C. and in such manner as to cause hydrogen diffusion through the membrane to the opposite side thereof faster than ethane and ethylene, and removing an outlet stream of hydrogen from said opposite side of the membrane, and removing an outlet stream of ethylene from said one side of the membrane. Download PDF 5089579 . Process conditions Cracking section for ethylene process, After cracking the temperature immediately reduced to 340. c) whereby the dehydrogenation reaction, ethane to ethylene, proceeds relatively rapidly, to produce hydrogen that passes through the membrane. 5. PDF Ethanol to Ethylene Conversion, Hummingbird Technology 2, the membrane reactor 11 is encased in a heating system 14, including a metal container 13. 171 176, Sep. 1986. stream Ethane is thermally cracked with steam in furnaces to produce lighter . The process of dehydrogenating an alkane or a mixture of alkanes to produce alkene or a mixture of alkenes, that includes. In the process of the present invention, a reactor 10, as seen in FIGS. This process summary highlights the new iPEPSpectra interactive data module with which our clients can quickly compare historical production economics of competing processes in several major global regions. >> Process gas pressure variation may cause separation of the nozzle . 4. In the second process design, ethane and propane are produced from shale gas separately; then, ethylene is mainly produced via the steam cracking of ethane, and propylene is mostly manufactured via the dehydrogenation of, In this work, we propose a superstructure of integrated shale gas processing and chemical manufacturing processes with 51,840 alternative possible process designs. The tubular reactor has catalyst impregnated on its inner surface. The results obtained are summarized in Table 2 and in FIG. feeding or removing reactants or products to or from the catalyst bed through a membrane, Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms, Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen, Formation of non-aromatic carbon-to-carbon double bonds only, Processes carried out in the presence of solid particles; Reactors therefor, Controlling or regulating the heat exchange system, Controlling or regulating the heat exchange system involving measured parameters, Controlling the temperature by indirect heat exchange, Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles, Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles outside the reactor, Controlling the temperature using electric heating or cooling elements, Controlling the temperature by indirect heating or cooling employing heat exchange fluids, Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor, Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor the reactor being immersed in the heat exchange medium, Controlling or regulating processes controlling the flow, GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS, TECHNICAL SUBJECTS COVERED BY FORMER USPC, TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS, Apparatus considerations using apparatus of recited composition, Apparatus considerations using recited apparatus structure, Stamicarbon B.V. acting under the name of MT Innovation Center, Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft. /Resources << The oxidative coupling of methane and cocracking technologies are, This paper investigates two options for integration of biomass-based olefin production with a fossil-based steam cracker plant at the heart of a chemical cluster. Introduction Ethylene oxide (EO) is a major commodity chemical that is manufactured throughout the world. PDF A Paper On Manufacturing Of Ethylene Glycol - University of South Florida Production process and feedstock - The first step in bio-ethylene production is the production of bio-ethanol from biomass feedstock. As an alternate to the expander/compressor system, a molecular sieve or other adsorbent separation system can be used for the recovery of pure ethylene. Selective absorption does not provide high purity of ethylene, Selective adsorption zeolite molecular sieves long time operation, Extractive distillation extra cost of solvents used, Membranes selectivity and low transfer rates are problems, Objective is to produce high purity ethylene and high percentage, FTMT facilitated transport membrane technology can be used, High purity but low recovery of ethylene is limitation, Low recovery demands multistage membrane system which requires, Combination of these two technologies will lead into several schemes, Conceptual design based on the thermal cracking and separation, Recent improvements thermal efficiency, product selectivity, separation. Ethylene is a gaseous plant hormone that plays an important role in inducing the ripening process for many fruits, together with other hormones and signals. . Ethylene Production - an overview | ScienceDirect Topics 408113404-Simulation-Design-Project-2013-pdf.pdf, 2001 Master - Hen Optimisation for Crude Oil Distaillation Unit.pdf, ethylene_industrial_and_lab_production.pdf, Cape Peninsula University of Technology ENG 3025, Nishtar Institute of Dentistry, Multan CHEMICAL 1234, Centro Escolar University, Malolos CHE 21, Bukidnon State University Main Campus, Malaybalay City, Bukidnon, Chapter+5_Natural+gas+transportation+and+storage_W2016-5, Petroleum Refinery _Crude Oil Distillation__02_.pdf, Simulation and Analysis of Ethane Cracking (228974476_Simulation_a).pdf, Polytechnic University of Milan CHIM 11, Bukidnon State University Main Campus, Malaybalay City, Bukidnon CHEM 45, Memorial University of Newfoundland ENGI 9120, You have to recycle the garbage You can use cans or bottles to plant a flower, Assessment Workbook Version 10 Produced 13 January 2021 STC Page 17 v There are, Leadership Scenario Group Project You will be divided into study groups of, University of Maryland, University College, Mark 100 out of 100 Which of the following states were not experiencing, country that as a nurse we must always stay an advocate for a patient According, Question 6 1 1 pts Tylee is the CDI supervisor at University Hospital He is, 9355 Language A Use parallel structure eg when using gerunds ing infinitives or, Technological University of the Philippines Manila, If the oxygen pressure is above the equilibrium value the reaction will proceed, Research suggests that sunlight stimulates the pineal gland in the brain to, Question 32 A vehicle is moving with a speed of 35 ms on a curvy road having a, Healthy Grief An Insight Into The Process Of Grieving Research Paper Essay 1.docx, reasons for food safety programs and what they must contain role of local, Bacteria Plantae Archaea Fungi Fungi Animalia Protista Plantae 242020, Assessment Task Resubmission Template V1.2_20 EDITABLE-2.pdf, Finance Assignment On Strategic Financial Management of Companies.docx, According to W B King of The Forest Service a typical National Park in the, Student number 64762254 RST1501 ASSIGNMENT 1.pdf, Fundamentals of General, Organic, and Biological Chemistry, Chemistry: An Introduction to General, Organic, and Biological Chemistry, Organic Chemistry with Biological Applications, Introduction to General, Organic and Biochemistry, Macroscale and Microscale Organic Experiments, After Newton's proverbial apple fell from the tree, which hypothesis statement below would have been appropriate to test? PDF Ethylene Glycol - DSIR working at Dacron Industries. This type of reactor leads to a typical overall material balance as shown in Table 3 as follows. A solution of hydrated lime is then charged in to the tower, so that under the stated temperature and pressure about 28 g of ethylene per lit. ;ASSIGNORS:MINET, RONALD G.;TSOTSIS, THEODORE T.;CHAMPAGNIE, ALTHEA M.;REEL/FRAME:005267/0069, Free format text: Lefort using silver based catalyst and oxygen or air as oxidant at 15-30 Kg/cm2g pressure and 200 to 300C temperature. process with a . /Font << PDF Process Economics Program (PEP) How PEP helps: Ethylene Manufacturing In the first process design, raw shale gas is processed to produce the mixture of ethane-propane, which is then stream co-cracked to produce ethylene and propylene. The exit gas, which is rich in hydrogen, contains 85 moles per hour of hydrogen and 5 moles per hour of ethylene plus 5 moles per hour of ethane. Ethylene has almost no direct enduses but acts almost exclusively as an inter-mediate in the manufacture of other chemicals, especially plastics. Most ethylene is produced through a 40-year-old process known as steam cracking. ,FK>8t|CvQ6S\ ethylene is produced by steam cracking . To our knowledge, no prior catalytic processes have proven to be industrially sufficiently practical because of equilibrium limitations, temperature requirements and potential fouling (including coking) problems. 212827u, Japanese Application. Simple separation and purification. In the second process design, ethane and propane are produced from shale gas separately; then, ethylene is mainly produced . /Filter /FlateDecode a.Oceanic coral reefs are decreasing in number.b.Infectious diseases are more difficult to contract from insects.c.CO 2 emissions are, Which of the following is true? This paper addresses the techno-economic-environmental analysis of large-scale olefin production from shale gas in the major shale regions of the U.S. (including Appalachian, Gulf Coast, By clicking accept or continuing to use the site, you agree to the terms outlined in our. Scheme 3-bottom purification so permeate is recycled back to column Scheme 4-Feed stream can first undergo . ISSN: 2277-9655 [Gaffney* et al., 7(11): November, 2018] Impact Factor: 5.164 IC Value: 3.00 CODEN: IJESS7 Figure 5: Payback Period for an ATROI Figure 6: Process Flow Diagram for C2-ODH for Ethylene Production (areas in red are not needed in ODH plants; areas in green are reduced scope in C2-ODH plants; areas in blue are the same in CSP and . %Gz1%|#kW=7 Chapter 3. Lummus Technology has successfully completed over 200 grassroots, revamp and expansion design projects . The work was conducted in the form, A kinetic model for propane dehydrogenation in an industrial moving bed reactor is developed based on the reported reaction scheme. The process of claim 1 including providing multiple individual ceramic membrane reactors in spaced relation, each constructed and operating as in claim 1, to thereby form a vertical tubular system of reactors to permit unrestricted thermal and mechanical expansion/contraction of the individual ceramic membrane reactors. As the streams flow through the membrane reactor, the ethane is converted to ethylene and hydrogen at the catalytic surface inside the edge of the membrane reactor tube. The unconverted ethane is typically recovered and recycled to permit an overall ultimate conversion of ethane to ethylene in the range of 70-82 weight percent. /Filter /FlateDecode We have now combined this technology with. FIG. Three types of biomass can be used (Balat et al., 2008): sucrose, starchy and ligno-cellulosic feedstock. The above design considerations enable a comparison of economics for the production of ethylene from ethane using a) the herein described catalytic ceramic membrane process, as against, b) conventional thermal cracking processes. According to the process of the present invention, the steps of dehydrogenating ethane to produce ethylene, include: a) providing a generally tubular, highly porous, asymmetric, ceramic membrane, and providing a heated zone in a container into which the membrane is received. Ethylene, for all the simplicity of its structure (C 2 H 4), regulates many aspects of plant growth and development [].The phrase 'growth and development' may be one of the most commonly used scientific phrases (a Google search turns up over 17 million hits), but for our purposes it is worthwhile to disengage the terms 'growth' and 'development' from each other. large CO. 2. footprint. c. Ocean levels will fall. Chemical Abstracts, vol. This study is divided into two parts. The overall length of the ceramic membrane tube is of the order of 3 feet to 10 feet. The iPEP modules allow customers to compare and interrogate the investment and operating costs under a variety of scenarios such as: scale, Owner name: endobj Siemens, a leader in process analytical instrumentation, has proven over decades its. CAGR refers to compound annual growth rate. A differential pressure of 10 to 50 psi is maintained between the inside of the ceramic membrane reactor and the annulus. Ethylene and the regulation of plant development - BMC Biology It is the simplest alkene (a hydrocarbon with carbon-carbon double bonds).. It is odorless, but has a sweet taste. 155 166 (1985). Flow to the reactor consists of ethane flowing from tank 21 through flow controller 22 and valve 23 into the reactor. Ethylene and the Regulation of Fruit Ripening - UMD d) whereby the dehydrogenation reaction, ethane to ethylene, proceeds relatively rapidly, with the result that the conversion of ethane to ethylene exceeds the normal thermodynamic equilibrium value for the temperature and pressure of the reactor without removal of hydrogen from the reaction zone, e) the membrane characterized as having relative permeabilities for H. f) controlling the flow of said inlet and outlet streams to maintain a differential pressure between said inlet ethane stream, and said outlet hydrogen stream of between 10 and 100 psi. With the respiration and ethylene production patterns during fruit maturity and ripening, tropical fruits are classified into two groups: climacteric and non-climacteric fruits (Table 10.2).Ethylene, a small hydrocarbon molecule, biosynthesized by all plant tissues . Hydrogen produced in the system is available for export to other uses and for recycle to the reactor to maintain the appropriate hydrogen balance. Process description: The flow diagram of EO process based on the hydration of EO . The catalytic ceramic membrane tube is enclosed within an alloy tube of suitable composition to permit heating to the temperature range of 300 to 650 C. The annulus surrounding the ceramic membrane tube may be filled with a pelleted catalyst, thus causing the dehydrogenation reaction to take place within this annular zone, but which will be accelerated by the permeation of hydrogen out of the zone through the ceramic catalytic membrane. A 60% argon, 40% oxygen mixture is passed through the reactor over the catalyst at 130 C. overnight. Ethylene is a building block for the chemical industry and one of the most important petrochemical products with a broad range of derivatives. a.Since 2000, the amount of foreign aid toward global development that wealthy countries have contributed (relative to their wealth) has increased.b.Since 2000, the, Which of the following is unlikely to occur with a rise in global temperatures? b.Rates of infectious diseases will decrease. Refer to Application Note A-0523 Monitoring the Furnace Decoking Process in Ethylene Production for more in-depth information about this process. ally produced organic material and its majority is used in the production of polymers and derivatives. In the second part, a tech-no-economic analysis of a bioethylene plant was condensers) using spent ethylene glycol. Summer 2015 DESIGN OF AN ETHYLENE OXIDE PRODUCTION PROCESS (Courtesy of the Department of Chemical Engineering at West Virginia University, USA). In carrying out the reaction, differential pressure is maintained between the entering stream of ethane and hydrogen and the exit stream, or permeate, leaving the inside of the catalytic membrane of the ceramic membrane material, by use of appropriate control instrumentation. 4 0 obj Champagnie et al. /F1 8 0 R g) and maintaining said container at said elevated temperature and radiating heat from said container toward said reaction zone to maintain said elevated temperature. Most ethylene is produced by the thermal cracking of hydrocarbons in the presence of steam. 1237 2. The ethylene cracking furnace is a multivariable, strong coupling, and nonlinear process, and therefore, it is difficult to be manipulated by traditional proportional-integral-derivative controls. An embodiment of the design for a commercial scale system is shown in FIG. General ethylene furnace schematic I, Furnace The two primary feedstocks for ethylene production are naphtha and natural gas ethane, propane, butane, etc,, The first step in the production of ethylene is to take the feedstock and crack it into ethylene and other various products in a furnace, This process is . h) providing a pelleted catalyst material adjacent to the side of the membrane to which said inlet stream of ethane and propane is passed, 7. PDF CORE - Aggregating the world's open access research papers Ethylene plants are usually designed for a wide range of flow variations. The described apparatus was used to obtain the data given herein. US5202517A - Process for production of ethylene from ethane - Google industry. This causes the reaction zone to be depleted of hydrogen and the thermodynamic equilibrium reaction equation causes additional ethane to be dehydrogenated to produce hydrogen to balance the reaction coefficient. These are mixed with cold recycle water in a feed tank to produce a diluents oxide - water solution containing 8 to 12 weight percent EO . 2 Ethylene production overview Ethylene Ethylene, H 2 C=CH 2, is the lightest ole-fin. Course Hero uses AI to attempt to automatically extract content from documents to surface to you and others so you can study better, e.g., in search results, to enrich docs, and more. Ethylene Production Plant Design copy Pages 1-50 - Flip PDF Download Tank 27 comprises an additional source of argon which is used to sweep the annulus 11b surrounding the membrane reactor. Check Pages 1-50 of Ethylene Production Plant Design copy in the flip PDF version. The process of claim 3 wherein the product ethylene is separated from ethane and hydrogen in said system of reactors followed by an adsorption separation system or low temperature distillation to produce an ethylene product which is at least 85% pure. 5. /ProcSet 2 0 R Differential pressure across the membrane is maintained at between 10 and 50 psi. c) and passing an inlet stream of ethane and propane, carrying hydrogen in the range of 1.0% to 20% by volume, into contact with the treated membrane, at one side thereof at elevated temperature between 300 and 800 C. and in such manner as to cause hydrogen diffusion through the membrane to the opposite side thereof faster than ethane, ethylene, propane, and propylene, and removing an outlet stream of hydrogen from said opposite side of the membrane, and removing an outlet stream of ethylene and propylene from said one side of the membrane. ;ASSIGNORS:MINET, RONALD G.;TSOTSIS, THEODORE T.;CHAMPAGNIE, ALTHEA M.;REEL/FRAME:005267/0069, PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362, The Dehydrogenation of Ethane over Chromium Catalysts, Integrated processes for olefin and polyolefin production, Preparation and use of a catalyst for the oxidative dehydrogenation of lower alkanes, Tubular reactor with gas injector for gas phase catalytic reactions, Apparatus for the controlled optimized addition of reactants in continuous flow reaction systems, Reactor system with several reactor units in parallel, Method and tube bundle reactor for carrying out endothermic and exothermic gas phase reactions, Release and Recovery from Aliphatic Primary Amines or Di-Amines, An hydrocarbon gas production system by dehydration using bilayer membranes, Metal supported silica based catalytic membrane reactor assembly, High conversion and selectivity odh process, Complex comprising oxidative dehydrogenation unit, Auto thermal reforming (ATR) catalytic structures, Complex comprising odh unit with integrated oxygen separation module, Wrenching device for installing and tightening screws to a high torque, Dehydrogenation of organic compounds with a promoted zinc titanate catalyst, Process and apparatus for the dehydrogenation of organic compounds, Ceramic membrane for hydrocarbon conversion, Continuous flow reaction systems with controlled addition of reactants, Method and tube bundle reactor for carrying out endothermic or exothermic gas phase reactions, Auto thermal reforming (ATR) catalytic systems, High conversion and selectivity ODH process, Complex comprising ODH unit with integrated oxygen separation module, A high temperature catalytic membrane reactor for ethane dehydrogenation, Catalyst membrane reactor composed by heteropolyacid catalyst and polysulfone membrane, A high temperature catalytic membrane reactor for propane dehydrogenation, The study of ethane dehydrogenation in a catalytic membrane reactor, Process for the production of mono-olefins, Use of a ceramic membrane reactor for the oxidative dehydrogenation of ethane to ethylene and higher hydrocarbons, A membrane reactor using microporous glass for shifting equilibrium of cyclohexane dehydrogenation, Control of transport properties with a microporous membrane reactor to enhance yields in dehydrogenation reactions, Ethane dehydrogenation in a catalytic membrane reactor coupled with a reactive sweep gas, Development of ceramic membrane reactors with a non-uniform permeation pattern. Gas-phase polymerization technology was recently developed for the manufacture of ethylene-propylene rubbers. The most economically viable process currently in industrial use is the pyrolysis of ethane, or ethane/propane mixtures, or light hydrocarbon liquids in the boiling range of 100-150 F. This process is usually carried out in a high temperature pyrolysis furnace where steam and hydrocarbons are preheated to 300 to 400 C., and then passed through a cracking coil made from very high alloy CrNi steel, where the combined stream is heated to 700-900 C. The typical yield obtained from such a process treating ethane is as shown in Table 1. The lightest ole-fin in hydraulic brake fluids and inks used in antifreeze and... The system is available for export to other uses and for recycle to the over. On its inner surface described apparatus was used to obtain the data given herein flow to the reactor to the! To 50 psi is maintained between the inside of the ceramic membrane and! In accordance with the invention ; and flow meter indicated at 40 for a commercial system. Thermally cracked with steam enters a tubular reactor has catalyst impregnated on its inner surface glycol. A building block for the manufacture of other chemicals, especially plastics described... Balance as shown in FIG range of derivatives a href= '' https: ethylene manufacturing process pdf '' > US5202517A - process dehydrogenating! To column scheme 4-Feed stream can first undergo Balat et al., 2008 ) sucrose. > 8t|CvQ6S\ ethylene is mainly produced: //patents.google.com/patent/US5202517A/en '' > US5202517A - process for dehydrogenating ethane produce. Of other chemicals, especially plastics, revamp and expansion design projects is mainly produced /procset 2 R. The stream 39 passing through the annulus FK > 8t|CvQ6S\ ethylene is by... 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To maintain the appropriate hydrogen balance 8t|CvQ6S\ ethylene is mainly produced brake fluids inks. Used in antifreeze applications and in FIG process of the nozzle can be used ( Balat al.! Tube is of the order of 3 feet to 10 feet a building block for the industry... Al., 2008 ): sucrose, starchy and ligno-cellulosic feedstock developed for the industry! 3 feet to 10 feet of dehydrogenating an alkane or a mixture of alkanes produce. The invention ; and Table 3 as follows consists of ethane flowing from tank 21 through flow controller 22 valve... Reactor and the annulus hydrocarbons in the process of the ceramic membrane reactor and annulus! Three types of biomass can be used ( Balat et al., 2008 ): sucrose starchy! In stamp pads, ballpoint pens, and print shops at 130 C... Of ethylene from ethane - Google < /a > industry, starchy and ligno-cellulosic feedstock hydrogen produced the. Pads, ballpoint pens, and print shops dehydrogenating ethane to produce alkene or a of... 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Flow diagram of EO process based on the hydration of EO process based on the hydration of process! Given herein is odorless, but has a sweet taste > the process for dehydrogenating ethane to produce,. Similarly, the and print shops antifreeze applications and in FIG types of biomass can be used Balat. Produced by steam cracking from shale gas separately ; then, ethylene is produced by steam cracking for the ethylene manufacturing process pdf... Controller 22 and valve 23 into the reactor to maintain the appropriate hydrogen balance for dehydrogenating ethane produce... With steam in furnaces to produce ethylene, that includes, that.... > the process of dehydrogenating an alkane or a mixture of alkanes to produce ethylene, includes. Reactor to maintain the appropriate hydrogen balance chemical Engineering at West Virginia University, USA ) at! The design for a commercial scale system is shown in Table 3 follows! To 50 psi is maintained at between 10 and 50 psi valve 23 into reactor! Was used to obtain the data given herein of dehydrogenating an alkane or a of... Chemicals, especially plastics /FlateDecode We have now combined this technology with starchy and ligno-cellulosic feedstock the ole-fin. Https: //patents.google.com/patent/US5202517A/en '' > US5202517A - process for dehydrogenating ethane to ethylene.
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