EP0000766B1 - Verfahren zum Herstellen von Homo- und Copolymerisaten des Äthylens - Google Patents

Verfahren zum Herstellen von Homo- und Copolymerisaten des Äthylens Download PDF

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Publication number
EP0000766B1
EP0000766B1 EP78100566A EP78100566A EP0000766B1 EP 0000766 B1 EP0000766 B1 EP 0000766B1 EP 78100566 A EP78100566 A EP 78100566A EP 78100566 A EP78100566 A EP 78100566A EP 0000766 B1 EP0000766 B1 EP 0000766B1
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EP
European Patent Office
Prior art keywords
phase
stage
ethylene
liquid
gaseous
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP78100566A
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German (de)
English (en)
French (fr)
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EP0000766A1 (de
Inventor
Erich Pfeiffer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
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BASF SE
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Publication date
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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
    • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F10/02—Ethene
    • 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
    • Y—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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • a preferred variant of the process according to the invention is characterized in that the amount of heat required for lowering the temperature and for condensation is removed in stage (d) by means of a heat exchanger, the heat-absorbing medium of which is liquid, evaporating ethylene, which in turn evaporates into the polymerization space is introduced.
  • a special embodiment of the above-mentioned preferred variant of the process according to the invention is characterized in that the liquid ethylene serving as the heat-absorbing medium is obtained from gaseous ethylene by means of a heat exchanger, the heat-absorbing medium of which is liquid, evaporating alkane hydrocarbon, which in turn evaporates in the Polymerization space is introduced.
  • a further special embodiment of the preferred variant of the process according to the invention is characterized in that the liquid ethylene serving as the heat-absorbing medium is obtained from gaseous ethylene by means of a heat exchanger, the heat-absorbing medium of which is the liquid phase from stage (d).
  • the devices required for the process such as polymerization reactors, inlet and outlet members, valves for reducing the pressure (expansion valves), expansion tanks, dryers, flushing devices, pumps and compressors for increasing the pressure and for conveying, condensers and evaporators in turn have no special features and belong to the well-known prior art.
  • step (d ) dissipates the amount of heat required for lowering the temperature and for condensation by means of a heat exchanger, the heat-absorbing medium of which is liquid, evaporating ethylene (which in turn is introduced into the polymerization space after evaporation).
  • Liquid ethylene is available as such in the context of ethylene chemistry in many cases and can easily reach a temperature of e.g. Reach -70 ° C, that is, a temperature which is desirably low, so that one can save the use of special cold-generating units and / or non-proprietary refrigerants. If liquid ethylene is not available anyway, it can be obtained as an integrated component in the process according to the invention in a simple and advantageous manner (see FIG.
  • stage (d) it should finally be noted that discharging small amounts of the gaseous phase leaving there (see FIGS. 1 to 4, reference number (11) in each case) can prevent contaminating foreign gases, e.g. Acid, enrich in the system.
  • contaminating foreign gases e.g. Acid
  • stage (e) the liquid phase from stage (d) is broken down into two portions such that a certain amount of the liquid phase is evaporated at a certain pressure, forming a first portion (the one with the gaseous phase from stage (c) is combined) and the remaining amount of the liquid phase is returned to the polymerization space as a second portion - possibly after being present in the gaseous state as an intermediate agent.
  • Stage (e) primarily serves to ensure that the recovered alkanic hydrocarbon which is to be recycled into the polymerization space is in a pure state, specifically in the sense that neither inert gas nor contaminating foreign gases which adversely affect the polymerization, such as in particular, are present in the alkanic hydrocarbon Acid substance to be carried along.
  • part (e) of the liquid phase coming from stage (d) is evaporated in stage (e), and the undesired gases are thereby also driven off.
  • the remaining liquid, freed from unwanted gases, part of the alkanic hydrocarbon is either easily returned in the liquid state in the polymerization space or is evaporated as an intermediate and only then returned to the polymerization space.
  • the latter procedure will be chosen especially if one wants to use the negative heat potential of the liquid alkanic hydrocarbon directly, for example to liquefy gaseous ethylene; - As explained in more detail in step (d) (see also FIG. 4). Since the liquid alkane hydrocarbon is generally completely evaporated during such use, any serious foreign substances can also be removed from the system as evaporation residue.
  • Evaporators known from distillation technology are suitable for carrying out stage (e). Appropriately, they are either equipped so that the liquid phase coming from stage (d) is partially evaporated (first portion) and otherwise remains in the liquid state (second portion), or are equipped so that the liquid phase coming from stage (d) is completely evaporated with separate discharge of the first and the second evaporated portion.
  • partial evaporators should be considered, e.g. apparatus designed as horizontal jacketed tube evaporators.
  • this procedure is designed so that in stage (d) the amount of heat required for lowering the temperature and for condensation is removed by means of a condenser (heat exchanger), the heat of which is absorbed medium is liquid, evaporating ethylene, which in turn is used in the process by the process Polymerization room is introduced.
  • a condenser heat exchanger
  • the liquid ethylene which acts as a heat-absorbing medium, is in turn obtained from gaseous ethylene under 60 bar excess pressure by means of a condenser (heat exchanger), the heat-absorbing medium of which is liquid, evaporating i-butane, which in turn evaporates into the polymerization chamber is introduced.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Polymerisation Methods In General (AREA)
EP78100566A 1977-08-05 1978-08-01 Verfahren zum Herstellen von Homo- und Copolymerisaten des Äthylens Expired EP0000766B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2735355 1977-08-05
DE19772735355 DE2735355A1 (de) 1977-08-05 1977-08-05 Verfahren zum herstellen von homo- und copolymerisaten des aethylens
US05/930,058 US4258158A (en) 1977-08-05 1978-08-01 Manufacture of ethylene homopolymers and copolymers

Publications (2)

Publication Number Publication Date
EP0000766A1 EP0000766A1 (de) 1979-02-21
EP0000766B1 true EP0000766B1 (de) 1981-09-16

Family

ID=25772476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100566A Expired EP0000766B1 (de) 1977-08-05 1978-08-01 Verfahren zum Herstellen von Homo- und Copolymerisaten des Äthylens

Country Status (5)

Country Link
US (1) US4258158A (enrdf_load_stackoverflow)
EP (1) EP0000766B1 (enrdf_load_stackoverflow)
JP (1) JPS5429388A (enrdf_load_stackoverflow)
AT (1) AT362580B (enrdf_load_stackoverflow)
DE (1) DE2735355A1 (enrdf_load_stackoverflow)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS578205A (en) * 1980-06-17 1982-01-16 Showa Denko Kk Production of ethylenic polymer
US4372758A (en) * 1980-09-02 1983-02-08 Union Carbide Corporation Degassing process for removing unpolymerized monomers from olefin polymers
JPS5767612A (en) * 1980-10-15 1982-04-24 Mitsui Petrochem Ind Ltd Preparation of ethylene copolymer
JPS6198705A (ja) * 1984-10-20 1986-05-17 Mitsui Petrochem Ind Ltd ポリオレフインの連続的製造法
DE3815487A1 (de) * 1988-05-06 1989-11-16 Basf Ag Verfahren zur niederdruckcopolymerisation von ethylen mit (alpha)-olefinen und ethylencopolymerisate mit niederem restmonomerengehalt
JPH02190094A (ja) * 1989-01-19 1990-07-26 Tokyo Electric Power Co Inc:The 送電線の張力監視システム
US6545088B1 (en) 1991-12-30 2003-04-08 Dow Global Technologies Inc. Metallocene-catalyzed process for the manufacture of EP and EPDM polymers
US5391656A (en) * 1993-09-24 1995-02-21 Union Carbide Chemicals & Plastics Technology Corporation Recovery of unreacted monomers in an olefin polymerization process
FR2719847B1 (fr) * 1994-05-16 1996-08-09 Bp Chemicals Snc Procédé de polymérisation d'oléfine en phase gazeuse.
US5533437A (en) * 1995-01-20 1996-07-09 Air Products And Chemicals, Inc. Recovery of hydrocarbons from polyalkene product purge gas
US5861474A (en) * 1996-07-23 1999-01-19 The Dow Chemical Company Polymer devolatilization
US6239235B1 (en) * 1997-07-15 2001-05-29 Phillips Petroleum Company High solids slurry polymerization
WO2001005842A1 (en) * 1999-07-15 2001-01-25 Phillips Petroleum Company Slotted slurry take off
DE102005005506A1 (de) * 2005-02-04 2006-08-10 Basell Polyolefine Gmbh Verfahren und Vorrichtung zur Polymerisation von Ethylen
US10029230B1 (en) 2017-01-24 2018-07-24 Chevron Phillips Chemical Company Lp Flow in a slurry loop reactor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152872A (en) * 1964-10-13 figure
DE1251027B (de) * 1954-11-08 1967-09-28 Phillips Petroleum Company Bart-Iesville OkIa (V St A) Verfahren zur Gewinnung von hochmolekularen Polyolefinen
BE557968A (enrdf_load_stackoverflow) 1956-06-11
AT222349B (de) * 1956-06-11 1962-07-10 Phillips Petroleum Co Verfahren zur Polymerisierung wenigstens eines polymerisierbaren Kohlenwasserstoffes
US3242150A (en) * 1960-03-31 1966-03-22 Phillips Petroleum Co Method and apparatus for the recovery of solid olefin polymer from a continuous path reaction zone
BE611135A (enrdf_load_stackoverflow) * 1960-12-06
US3218729A (en) * 1962-01-15 1965-11-23 Dow Chemical Co Drying wet granular solid materials
NL296063A (enrdf_load_stackoverflow) * 1962-08-03
NL7514733A (nl) * 1975-12-17 1977-06-21 Mitsubishi Heavy Ind Ltd Werkwijze voor het winnen van oplosmiddeldamp uit een mengsel daarvan met lucht.

Also Published As

Publication number Publication date
EP0000766A1 (de) 1979-02-21
ATA568778A (de) 1980-10-15
JPS5429388A (en) 1979-03-05
JPS6244563B2 (enrdf_load_stackoverflow) 1987-09-21
AT362580B (de) 1981-05-25
DE2735355A1 (de) 1979-02-15
US4258158A (en) 1981-03-24

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