[특허]Mitigation of catalyst inhibition in olefin polymerization

[미국특허] Mitigation of catalyst inhibition in olefin polymerization 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08F-210/18 C08F-006/02 C08F-002/04 C08F-006/00 C08F-210/02
출원번호	US-0426670 (2017-02-07)
등록번호	US-10047178 (2018-08-14)
발명자 / 주소	Reed, Aaron H. Ravishankar, Periagaram S. Barsan, Florin
출원인 / 주소	ExxonMobil Chemical Patents Inc.
인용정보	피인용 횟수 : 0 인용 특허 : 18

초록 ▼

This disclosure relates to a process for polymerization, and in particular to minimizing undesired polymerization reactions downstream of a polymerization reaction zone, for instance by use of a quenching agent that enables fast reaction rates with active polymerization catalyst in the polymerization effluent, so as to quench the catalyst quickly, thereby preventing uncontrolled polymerization reactions. A preferred quenching agent is methanol. Also provided are means for treating polymer recycle streams containing oxygenates, which may result from the use of such quench agents, particularly in polymerization processes including polyene (e.g., diene) monomers.

대표청구항 ▼

1. A process comprising: (a) feeding one or more monomers and a polymerization solvent to a solution polymerization reaction zone;(b) polymerizing at least a portion of the one or more monomers in the presence of a polymerization catalyst in the solution polymerization reaction zone;(c) withdrawing a polymerization effluent from the polymerization reaction zone, wherein the polymerization effluent comprises active polymerization catalyst and one or more unreacted monomers;(d) adding a quenching agent which consists of methanol and water to the polymerization effluent so as to quench the active polymerization catalyst in the polymerization effluent, thereby forming a quenched polymer stream; and(e) recovering solid polymer product from the quenched polymer stream, wherein the quenching agent quenches the active polymerization catalyst at a quenching rate such that the solid polymer product, when extruded as a cast film, has a mean gel count of 10 m−2 or less. 2. The process of claim 1, wherein recovering solid polymer product comprises: (I) separating the quenched polymer stream into a polymer product stream and a polymer recycle stream; and (II) devolatilizing the polymer product stream so as to recover the solid polymer product. 3. The process of claim 2, further comprising: (I-a) contacting at least a portion of the polymer recycle stream with an adsorbent bed comprising at least two adsorbents so as to produce a treated recycle stream. 4. The process of claim 1, wherein the one or more monomers comprise one or more polyenes. 5. The process of claim 4, wherein the one or more monomers comprise ethylene, propylene, and a diene. 6. The process of claim 4, wherein the quenched polymer stream comprises C10 and C19 oxygenates. 7. The process of claim 3, wherein the adsorbent bed comprises a zeolitic molecular sieve and a hybrid zeolite in alumina. 8. The process of claim 7, wherein the adsorbent bed further comprises at least one silica adsorbent. 9. The process of claim 7, wherein the zeolitic molecular sieve comprises material selected from the group consisting of zeolite X, zeolite Y, zeolite A, faujasite, mordenite, ferrierite, and mixtures thereof. 10. The process of claim 1, wherein the quenching rate is such that the solid polymer product has a mean gel count of 9 m−2 or less.

이 특허에 인용된 특허 (18) 인용/피인용 타임라인 분석

deRosset Armand J. (Sarasota FL), Adsorptive separation of contaminants from naphtha.
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Kanazirev, Vladislav I., Composite adsorbents for purifying hydrocarbon streams.
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Herskovits Lily E. (Glenview IL), Etherification process with sorptive treating of hydrocarbon recycle stream.
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Eisinger,Ronald Steven; Zilker, Jr.,Daniel Paul; Swecker, II,James Leland, Feed purification at ambient temperature.
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Yon Carmen M. (Carmel NY) Quock Joe (Hopewell Junction NY) Rastelli Henry (New Fairfield CT) Reel Wim P. (Emblem BEX), Liquid phase adsorption process.
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Vizzini,James Charles; Powell,Ted Alexander; Ju,Shiaw Tzuu, Methods of feed purification for olefin polymerization.
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Ho, Suzzy C.; Canich, Jo Ann M.; Mertens, Machteld M.; Ravishankar, Periagaram S.; Byrne, Patrick S.; Stefaniak, Lisa B. V., Mitigation of catalyst inhibition in olefin polymerization.
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Murakami,Toshio; Murakami,Hidetatsu; Takano,Yasuhiro; Doi,Kenji; Kumagae,Akira; Hasada,Yasuhiro; Nishimura,Toshizi, Non-conjugated cyclic diene, non-conjugated cyclic diene composition and method of producing polymer based on non-conjugated cyclic diene.
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Sparks Allen K. (Des Plaines IL), Process for producing alkylaromatics.
상세보기
Kulprathipanja, Santi; Priegnitz, James W.; Sohn, Stephen W., Process for removal of oxygenates from a paraffin stream.
상세보기
Kulprathipanja,Santi; Priegnitz,James W.; Sohn,Stephen W.; Glover,Bryan K.; Vora,Bipin V., Process for removal of oxygenates from a paraffin stream.
상세보기
Kulprathipanja,Santi; Priegnitz,James W.; Sohn,Stephen W.; Glover,Bryan K.; Vora,Bipin V., Process for removal of oxygenates from a paraffin stream.
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Rossini Stefano,ITX ; Piccoli Valerio,ITX, Process for removing oxygenated contaminants from hydrocarbon streams.
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Kahn Henry (5603 Rutherglen Houston TX 77096), Process for the manufacture of elastomers in particulate form.
상세보기
Hottovy John D., Process for treating fluid streams.
상세보기
Diaz Zaida (Houston TX) Tsiang Raymond C. (Taipei TWX), Removal of alkali metal methoxide catalyst residue from hydroxy-terminated conjugated diene polymers.
상세보기
Risch,Michael A.; Ou,John Di Yi, Removal of oxygenate from an olefin stream.
상세보기
Kallenbach Lyle R. (Bartlesville OK) Johnson Marvin M. (Bartlesville OK), Separation of polar substances from hydrocarbons.
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A	생활필수품
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[미국특허] Mitigation of catalyst inhibition in olefin polymerization 원문보기