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US20030073788A1 - Recovery of olefin monomers - Google Patents

Recovery of olefin monomers Download PDF

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Publication number
US20030073788A1
US20030073788A1 US09/976,525 US97652501A US2003073788A1 US 20030073788 A1 US20030073788 A1 US 20030073788A1 US 97652501 A US97652501 A US 97652501A US 2003073788 A1 US2003073788 A1 US 2003073788A1
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United States
Prior art keywords
nitrogen
olefin
monomer
adsorbent
stream
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Abandoned
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US09/976,525
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English (en)
Inventor
Timothy Golden
Edward Weist
Charles Johnson
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Air Products and Chemicals Inc
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Air Products and Chemicals Inc
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Priority to US09/976,525 priority Critical patent/US20030073788A1/en
Assigned to AIR PRODUCTS AND CHEMICALS, INC. reassignment AIR PRODUCTS AND CHEMICALS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GOLDEN, TIMOTHY CHRISTOPHER, JOHNSON, CHARLES HENRY, WEIST JR., EDWARD LANDIS
Assigned to ENERGY, UNITED STATES DEPARTMENT OF reassignment ENERGY, UNITED STATES DEPARTMENT OF CONFIRMATORY LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: AIR PRODUCTS AND CHEMICALS, INC.
Priority to DE60200543T priority patent/DE60200543T2/de
Priority to AT02256955T priority patent/ATE267845T1/de
Priority to EP02256955A priority patent/EP1302478B1/de
Priority to US10/385,947 priority patent/US6706857B2/en
Publication of US20030073788A1 publication Critical patent/US20030073788A1/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00—Post-polymerisation treatments
    • C08F6/001—Removal of residual monomers by physical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00—Post-polymerisation treatments
    • C08F6/001—Removal of residual monomers by physical means
    • C08F6/005—Removal of residual monomers by physical means from solid polymers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
    • F25J3/0605—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the feed stream
    • F25J3/062—Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
    • F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
    • F25J3/064—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of CnHm with 2 carbon atoms or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
    • F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
    • F25J3/066—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/104—Alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/302—Dimensions
    • B01D2253/306—Surface area, e.g. BET-specific surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/302—Dimensions
    • B01D2253/308—Pore size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/24—Hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/40—Processes or apparatus using other separation and/or other processing means using hybrid system, i.e. combining cryogenic and non-cryogenic separation techniques
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/04—Mixing or blending of fluids with the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/12—Refinery or petrochemical off-gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/62—Ethane or ethylene
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration

Definitions

  • the present invention relates to the recovery of olefin monomer from a nitrogen purged degassing step in the manufacture of polyolefin.
  • the polymer contains residual olefin monomer. This is conventionally removed in a degassing step using nitrogen to strip the monomer from the polymer material.
  • the nitrogen purge gas now contaminated with olefin monomer and other reaction by products or monomer impurities such as ethane and isobutylene and methane, may be flared off or burned with fuel.
  • U.S. Pat. No. 4,498,910 discloses a process in which ethylene is reacted to produce ethylene oxide and a purge gas is withdrawn that contains residual ethylene together with a large amount of methane and a smaller proportion of other gases which include oxygen and ‘inert gases’, which may be argon and nitrogen.
  • the ethylene is recovered by pressure swing adsorption (PSA) using a silica gel adsorbent.
  • PSA pressure swing adsorption
  • the reported recovery of ethylene is about 97%, but the recovery of ethane is only about 62%.
  • U.S. Pat. No. 5,245,099 discloses the recovery by PSA over silica gel of ethylene and heavier components from a hydrocarbon stream which also contains a minor amount of nitrogen.
  • the light cut which is the residual gas from the PSA contains percent levels both of ethylene and of ethane and very large amounts of methane, which like the ethane concentrates there.
  • U.S. Pat. No. 4,849,537 discloses a process for making acrylonitrile from propane by dehydrogenation of the propane to propylene followed by aminoxidation using oxygen enriched air leading to a product stream containing the acrylonitrile from which acrylonitrile is removed as a liquid by quenching. This leaves an off-gas containing propylene which is recovered and recycled by subjecting the off-gas to PSA over silica gel. Once again, the residual gas from the PSA, or light stream, contains percent levels of hydrocarbons, with methane, ethane and ethylene concentrating there.
  • U.S. Pat. No. 4,781,896 discloses a polyolefin manufacturing process in which olefin monomer is recovered by de-gassing polyolefin product and is recycled. The recovery is done without the supply of a purge gas and it is remarked that the use of a nitrogen purge stream makes it difficult and expensive to recover the olefin.
  • U.S. Pat. No. 5,769,927 recovers olefin from such a nitrogen purge gas for recycle to the polymerisation by a process of condensation, flash evaporation and membrane separation.
  • the present invention now provides a process for the production of a polyolefin in which an olefin monomer is polymerised to produce said polyolefin and residual monomer is recovered, said process comprising subjecting a gas stream comprising said monomer and nitrogen to a PSA process in which said monomer is adsorbed on a periodically regenerated solid adsorbent to recover a purified gas stream containing said olefin and a nitrogen rich stream containing no less than 99% nitrogen and containing no less than 50% of the nitrogen content of the gas feed to the PSA process.
  • PSA pressure swing adsorption
  • the adsorbent may be silica gel but is preferably alumina of suitable pore size and surface area, on the grounds of price and performance.
  • the adsorbent is alumina having a surface area of no more than 900 m 2 /g, more preferably no more than 800 m 2 /g, most preferably no more than 600 m 2 /g.
  • the surface areas preferred are as given for alumina.
  • a layered bed or a pair of beds in series containing an upstream (with respect to the on-line feed direction of gas flow) silica gel portion and a down-stream alumina portion.
  • Adsorption of C 2 H 4 is characterised by a higher rate of mass transfer or alumina.
  • the linear driving force mass transfer coefficients that match measured breakthrough curves are 0.55 and 0.88 sec ⁇ 1 for alumina and silica gel respectively. Placing the alumina at the product end of the adsorbent bed sharpness the C 2 mass transfer zone.
  • the alumina has an average pore diameter of at least 1.7 nm, more preferably at least 2.0 nm.
  • Preferred particle sizes for the adsorbent are 0.25 to 4 mm.
  • the recovery of C 2+ hydrocarbons from the monomer and nitrogen containing gas stream is preferably no less than 95%, more preferably no less than 99%.
  • the ratio of ethylene in the monomer and nitrogen gas stream to the ethylene in the nitrogen rich stream is preferably at least 500 and the ratio of ethane in the monomer and nitrogen gas stream to the ethane in the nitrogen rich stream is preferably at least 50.
  • the PSA process is preferably operated using four beds, generally as described in U.S. Pat. No. 3,430,418, but any number of beds may be employed as known in the art. Feed temperatures are suitably from 5 to 100° C. at pressures of 1 to 20 bara. The beds may be regenerated at lower pressures from 0.1 to 2 bara.
  • the invention includes apparatus for use in the polymerisation of olefin comprising a polymerisation unit having an inlet for olefin monomer and an outlet for polymer connected to a polymer degassing unit having an inlet for nitrogen purge gas and an outlet for a nitrogen/monomer mixture connected to an olefin recovery unit comprising a compressor feeding said nitrogen/monomer mixture in a compressed state to an inlet of a liquid olefin separator having outlets for liquid olefin and for an olefin depleted nitrogen/olefin mixture, said outlet for liquid olefin being connected to recycle the olefin to the polymerisation unit, and a PSA gas separation unit connected to receive said olefin depleted nitrogen/olefin mixture and to produce therefrom a purified nitrogen stream containing no less than 99% nitrogen and a recovered olefin stream, said PSA unit being connected to return said recovered olefin stream to the inlet of said
  • FIG. 1 shows a schematic flow sheet of a monomer recovery and recycle system according to the invention.
  • FIG. 2 is a graph of nitrogen recovery against adsorbent surface area produced in Example 1.
  • FIG. 3 is a graph of nitrogen recovery against adsorbent average pore size produced in Example 1.
  • an olefin polymerisation reactor 2 receives olefin monomer through an inlet 4 and feeds a degassing unit 6 purged by nitrogen introduced via a line 8 . Vent gas from the nitrogen purged degassing of the polyolefin is received at an inlet to a cooler 10 , is compressed by a compressor 12 , is cooled in a heat exchanger 14 against liquefied recovered hydrocarbons in line 16 and is dried in a drier 18 .
  • the stream is further cooled in a heat exchanger 20 against olefin containing gas in a line 22 and is still further cooled in heat exchanger 24 against refrigerant in a refrigeration system 26 before passing to a liquid hydrocarbon separator 28 from which liquid hydrocarbon exits through line 16 and is fed to heat exchanger 14 by a pump 30 .
  • Gas separated in the separator 28 passes via line 22 and heat exchanger 20 to a PSA separation plant 32 which produces a residual gas stream of essentially pure nitrogen through line 34 and a recycle stream rich in recovered olefin and other hydrocarbons through line 36 which is fed back up stream of the compressor 12 .
  • the PSA system is of conventional construction and has multiple beds of adsorbent which are on-line adsorbing hydrocarbons and are undergoing regeneration in a cyclic manner.
  • a four bed system is used in the following example, but other configurations of more or fewer beds may be used as known in the art.
  • a four bed PSA cycle with one pressure equalisation step as described in U.S. Pat. No. 3,430,418, Example 1, is used.
  • the cycle consists of the following steps: 1 Adsorption 8 minutes 2 Pressure equalisation 1 minute 3 Cocurrent depressurisation 7 minutes 4 Countercurrent depressurisation 1 minute 5 Purge 7 minutes 6 Repressurisation 8 minutes
  • the cocurrent depressurisation effluent gas is sent to the effluent or light cut stream, rather than to another bed. Repressurisation is with nitrogen rather than feed gas.
  • the cocurrent steps(feed, pressure reduction and purge are all stopped prior to C 2 breakthrough.
  • FIGS. 2 and 3 Plots of the nitrogen recovery against adsorbent specific surface area and pore size are shown in FIGS. 2 and 3 respectively.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Treating Waste Gases (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
US09/976,525 2001-10-12 2001-10-12 Recovery of olefin monomers Abandoned US20030073788A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US09/976,525 US20030073788A1 (en) 2001-10-12 2001-10-12 Recovery of olefin monomers
DE60200543T DE60200543T2 (de) 2001-10-12 2002-10-08 Rückgewinnung von Olefinen
AT02256955T ATE267845T1 (de) 2001-10-12 2002-10-08 Rückgewinnung von olefinen
EP02256955A EP1302478B1 (de) 2001-10-12 2002-10-08 Rückgewinnung von Olefinen
US10/385,947 US6706857B2 (en) 2001-10-12 2003-03-11 Recovery of olefin monomers

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Cited By (7)

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US7037485B1 (en) 2004-11-18 2006-05-02 Praxair Technology, Inc. Steam methane reforming method
US20070249793A1 (en) * 2006-04-19 2007-10-25 Vanderbilt Jeffrey J Simplified process to prepare polyolefins from saturated hydrocarbons
US7395670B1 (en) 2005-02-18 2008-07-08 Praxair Technology, Inc. Gas turbine fuel preparation and introduction method
EP3264011A4 (de) * 2015-04-27 2018-01-17 Mitsubishi Heavy Industries Compressor Corporation Gasrückgewinnungssystem, verdichtersystem und kühlkreislaufsystem
US10092876B2 (en) 2014-08-07 2018-10-09 Linde Aktiengesellschaft Recovery of gases, especially permanent gases, from streams of matter, especially from offgas streams from polymerizations
US20190336906A1 (en) * 2018-05-07 2019-11-07 Chevron Phillips Chemical Company Lp Nitrogen Conservation in Polymerization Processes
JPWO2021039273A1 (de) * 2019-08-23 2021-03-04

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003227182A1 (en) * 2002-03-29 2003-10-13 Mitsui Chemicals, Inc. Method of recycling waste gas in polymer production plant
BRPI0820663A2 (pt) * 2007-11-27 2015-06-16 Univation Tech Llc Alimentação de hidrocarbonetos integrada com separador e método de usar o mesmo
WO2009075846A2 (en) * 2007-12-12 2009-06-18 Univation Technologies, Llc Integrated polyolefins vent recovery
KR101854945B1 (ko) * 2010-12-17 2018-05-04 유니베이션 테크놀로지즈, 엘엘씨 폴리올레핀 퍼지 기체 생성물로부터 탄화수소를 회수하기 위한 시스템 및 방법
FR2974363B1 (fr) 2011-04-22 2014-12-19 Michelin Soc Tech Recuperation de monomeres.
EP2869908B1 (de) * 2012-07-09 2018-09-12 Total Petrochemicals France Zyklischer prozess zur erzeugung von hochreinem stickstoff und eventuell von hochreinen kohlenwasserstoffen aus einem feedgas, das stickstoff und kohlenwasserstoffe enthält
DE102014011750A1 (de) 2014-08-07 2016-02-11 Linde Aktiengesellschaft Rückgewinnung von Gasen, insbesondere Permanentgasen, aus Stoffströmen, insbesondere aus Abgasströmen von Polymerisationen
CN107207650B (zh) 2014-12-22 2020-09-15 Sabic环球技术有限责任公司 不相容催化剂之间的转换方法
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US20030176634A1 (en) 2003-09-18
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