EP0000766A1 - Procédé de préparation d'homo- et copolymères d'éthylène - Google Patents

Procédé de préparation d'homo- et copolymères d'éthylène Download PDF

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Publication number
EP0000766A1
EP0000766A1 EP7878100566A EP78100566A EP0000766A1 EP 0000766 A1 EP0000766 A1 EP 0000766A1 EP 7878100566 A EP7878100566 A EP 7878100566A EP 78100566 A EP78100566 A EP 78100566A EP 0000766 A1 EP0000766 A1 EP 0000766A1
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EP
European Patent Office
Prior art keywords
stage
polymer
ethylene
phase
liquid
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.)
Granted
Application number
EP7878100566A
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German (de)
English (en)
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EP0000766B1 (fr
Inventor
Erich Pfeiffer
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BASF SE
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BASF SE
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Publication date
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Publication of EP0000766A1 publication Critical patent/EP0000766A1/fr
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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 room 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 11 polymerization reactors, inlet and outlet elements, 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 state of the art.
  • stage (d) it has been shown that it is generally advisable to work in such a way that the pressure in stage (d) is higher than in stage (c); - ie, in general for stage (d) the gaseous phase coming from stage (c) will be compressed.
  • the pressure to be set in stage (d) can in turn be lower the lower the temperature to be set (state diagram of the alkanic hydrocarbon!)
  • the heat-absorbing medium is liquid, evaporating ethylene (which in turn is introduced into the polymerization chamber after evaporation).
  • liquid ethylene is in many cases available as such in the context of ethylene chemistry and can easily reach a temperature of -70 ° C, for example, a temperature that is desirably low, so that the use of special refrigeration-generating units can be achieved and / or spare the in-process refrigerant.
  • 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. 3) by obtaining it from gaseous ethylene by means of a heat exchanger, the heat-absorbing medium of which is more liquid and evaporating Alkanic hydrocarbon - in turn a process-specific refrigerant - is (which in turn is introduced into the polymerization space after evaporation).
  • the liquid alkanic hydrocarbon serving as the heat-absorbing medium in turn can expediently be the liquid phase from stage (d) (cf. FIG. 4).
  • stage (d) by discharging small amounts of the gaseous phase leaving there - provided this is combined with the inert gas for stage (c) - (see FIGS. 1 to 4, reference number (11) in each case) can be prevented that contaminating foreign gases, for example Oxygen, accumulate in the system ..
  • stage (e) the liquid phase from stage (d) is divided into two parts that a certain advantageously, is combined with the gaseous phase from stage (c)) and the remaining amount of the liquid phase is returned as a second portion - optionally after being present in the gaseous state - back into the polymerization space.
  • Stage (e) serves primarily to ensure that the recovered alkanic hydrocarbon to be recycled into the polymerization space is in a pure state, mainly in the sense that neither inert gas nor contaminating foreign gases adversely affecting the polymerization, such as in particular, are present in the alkanic hydrocarbon Oxygen to be dragged 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 above all 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 in such a way that the resulting from stage (d) mende liquid phase is partially evaporated (first part) and otherwise remains in the liquid state (second part), or equipped so that the liquid phase coming from stage (d) is completely evaporated with separate discharge of the first and of the second evaporated portion.
  • partial evaporators are to be considered, for example apparatus designed as horizontal double-walled 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-absorbing medium of which is liquid, evaporating ethylene, which in turn is used in 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 Procédé de préparation d'homo- et copolymères d'éthylène Expired EP0000766B1 (fr)

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 true EP0000766A1 (fr) 1979-02-21
EP0000766B1 EP0000766B1 (fr) 1981-09-16

Family

ID=25772476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100566A Expired EP0000766B1 (fr) 1977-08-05 1978-08-01 Procédé de préparation d'homo- et copolymères d'éthylène

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722953A1 (fr) * 1995-01-20 1996-07-24 Air Products And Chemicals, Inc. Récupération d'hydrocarbures à partir de gaz de puge de produit de polyalcènes

Families Citing this family (14)

* 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.
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
CN1361794A (zh) * 1999-07-15 2002-07-31 菲利浦石油公司 以开槽方式引出悬浮体
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152872A (en) * 1964-10-13 figure
DE2002806A1 (de) * 1969-01-23 1970-10-15 Phillips Petroleum Co Gewinnung von feinem pulverigen Material aus Polymerisat
NL7514733A (nl) * 1975-12-17 1977-06-21 Mitsubishi Heavy Ind Ltd Werkwijze voor het winnen van oplosmiddeldamp uit een mengsel daarvan met lucht.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU34024A1 (fr) * 1954-11-08
AT222349B (de) * 1956-06-11 1962-07-10 Phillips Petroleum Co Verfahren zur Polymerisierung wenigstens eines polymerisierbaren Kohlenwasserstoffes
BE557968A (fr) 1956-06-11
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 (fr) * 1960-12-06
US3218729A (en) * 1962-01-15 1965-11-23 Dow Chemical Co Drying wet granular solid materials
NL296063A (fr) * 1962-08-03

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152872A (en) * 1964-10-13 figure
DE2002806A1 (de) * 1969-01-23 1970-10-15 Phillips Petroleum Co Gewinnung von feinem pulverigen Material aus Polymerisat
NL7514733A (nl) * 1975-12-17 1977-06-21 Mitsubishi Heavy Ind Ltd Werkwijze voor het winnen van oplosmiddeldamp uit een mengsel daarvan met lucht.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722953A1 (fr) * 1995-01-20 1996-07-24 Air Products And Chemicals, Inc. Récupération d'hydrocarbures à partir de gaz de puge de produit de polyalcènes

Also Published As

Publication number Publication date
AT362580B (de) 1981-05-25
EP0000766B1 (fr) 1981-09-16
JPS5429388A (en) 1979-03-05
JPS6244563B2 (fr) 1987-09-21
ATA568778A (de) 1980-10-15
US4258158A (en) 1981-03-24
DE2735355A1 (de) 1979-02-15

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