[특허]Process for producing polyolefins

Chevron Phillips Chemical Company LP

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특허 상세정보

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Process for producing polyolefins

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08F-002/06
미국특허분류(USC)	526/064; 526/352; 526/082; 526/084; 526/090
출원번호	US-0923751 (2001-08-07)
발명자 / 주소	Hottovy, John D. Carter, Michael C. Bohmer, Robert W. Kufeld, Scott E. Burns, David H. Verser, Donald W. Vaidyanathan, Ragayan
출원인 / 주소	Chevron Phillips Chemical Company LP
대리인 / 주소	Williams, Morgan &
인용정보	피인용 횟수 : 13 인용 특허 : 20

초록

A process is provided that produces polyolefins.

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1. A process comprising:(1) mixing Stream 1 with Stream 2 to produce Stream 3;wherein said mixing occurs in Mixing Zone One;wherein said Mixing Zone One comprises a slurry polymerization reactor selected from the group consisting of a loop reactor and a stirred tank;wherein Stream 1 comprises at least one catalyst deactivating agent;wherein Stream 2 comprises a reaction mixture;wherein said reaction mixture comprises at least one polyolefin, at least one catalyst, at least one diluent, and at least one monomer;wherein Stream 3 comprises at least one polyolefin, at least one deactivated catalyst, at least one diluent, and at least one monomer;(2) transporting at least a portion of Stream 3 from said Mixing Zone One through Stream Zone 1 and to Separating Zone One;wherein said Separating Zone One comprises at least one flash chamber;(3) separating Stream 3 in said Separating Zone One into Stream 4 and Stream 5;wherein said Stream 4 comprises a polyolefin lean stream wherein the majority of said Stream 4 comprises at least one diluent;wherein said Stream 5 comprises a polyolefin rich stream wherein the majority of said Stream 5 comprises at least one polyolefin;(4) transporting Stream 5 from said Separating Zone One through a Stream Zone 3 to an Agglomerating Zone One;(5) agglomerating Stream 5 in said Agglomerating Zone One to produce a Stream 6, wherein Stream 6 comprises at least one agglomerated polyolefin;(6) transporting Stream 6 from said Agglomerating Zone One through Stream Zone 4 to a Product Recovery Zone.2. A process according to claim 1 wherein said deactivating agent is selected from the group consisting of water, alcohols, and other oxygen-containing materials.3. A processing according to claim 2 wherein said polyolefin is selected from the group consisting of homopolymers consisting essentially of polymerized monomers having from 2 to about 10 carbon atoms per molecule and copolymers comprising at least two different polymerized monomers having from 2 to about 16 carbon atoms per molecule.4. A process according to claim 3 wherein said catalyst is selected from the group consisting of Ziegler-Natta catalysts, Phillips catalysts, and metallocene catalysts;wherein said catalysts comprise transition metals of Groups IVB?VIII of the Periodic Table of Elements.5. A process according to claim 4 wherein said diluent is isobutane.6. A process according to claim 5 wherein the amount of deactivating agent utilized ranges from about 10?6 moles of deactivating agent per mole of catalyst to about 102 moles of deactivating agent per mole of catalyst.7. A process according to claim 6 wherein said polyolefin is a homopolymer consisting essentially of polymerized ethylene.8. A process according to claim 7 wherein said deactivating agent utilized ranges from about 0.10 moles of deactivating agent per mole of catalyst to about 5 moles of deactivating agent per mole of catalyst.9. A process according to claim 8 wherein said deactivating agent is water.10. A process according to claim 1 wherein said Separating Zone One comprises:(3.1) heating Stream 3 in Heating Zone One producing Stream 3A;wherein said Heating Zone One comprises a flash line heater;(3.2) transporting Stream 3A from said Heating Zone One through Stream Zone 1A to a High Pressure Separating Zone;wherein said High Pressure Separating Zone comprises at least one flash chamber;(3.3) separating Stream 3A in said High Pressure Separating Zone to produce Stream 4A and Stream 5A;wherein said Stream 4A comprises a polyolefin lean stream;wherein the majority of said Stream 4A comprises at least one diluent;wherein said Stream 5A comprises a polyolefin rich stream;wherein the majority of said Stream 5A comprises at least one polyolefin;(3.9) transporting Stream 5A from said High Pressure Separating Zone through Stream Zone 1B to a Purge Zone Two;(3.10) purging Stream 5A in said Purge Zone Two with a gas to separate Stream 5A into Stream 4C and Stream 5D;wherein said Purge Zone Two comprises at least one purge column;wherein said Stream 4C comprises a polyolefin lean stream;wherein the majority of said Stream 4C comprises said gas and at least one diluent;wherein said Stream 5D comprises a polyolefin rich stream;wherein the majority of said Stream 5D comprise at least one polyolefin;(3.11) transporting Stream 5D from said Purge Zone Two through a Stream Zone 3B to an Agglomerating Zone One.11. A process according to claim 1 wherein said Separating Zone One comprises:(3.1) heating Stream 3 in Heating Zone One producing Stream 3A;wherein said Heating Zone One comprises at least one flash line heater;(3.2) transporting Stream 3A from said Heating Zone One through Stream Zone 1A to a High Pressure Separating Zone;(3.3) separating Stream 3A in said High Pressure Separating Zone to produce Stream 4A and Stream 5A;wherein said High Pressure Separating Zone comprises at least one flash chamber;wherein said Stream 4A comprises a polyolefin lean stream;wherein the majority of said Stream 4A comprises at least one diluent;wherein said Stream 5A comprises a polyolefin rich stream;wherein the majority of said Stream 5A comprises at least one polyolefin;(3.4) transporting Stream 5A from said High Pressure Separating Zone through Stream Zone 1B to a Low Pressure Separating Zone;(3.5) further separating Stream 5A in said Low Pressure Separating Zone to produce Stream 4B and Stream 5B;wherein said Low Pressure Separating Zone comprises at least one flash chamber;wherein said Stream 4B comprises a polyolefin lean stream;wherein the majority of said Stream 4B comprises at least one diluent;wherein said Stream 5B comprises a polyolefin rich stream;wherein the majority of said Stream 5B comprises at least one polyolefin;(3.6) transporting Stream 5B from said Low Pressure Separating Zone through Stream Zone 1C to a Purge Zone One;(3.7) purging Stream 5B in said Purge Zone One with a gas to separate Stream 5B into Stream 4D and Stream 5C;wherein said Purge Zone One comprises at least one purge column;wherein said Stream 4D comprises a polyolefin lean stream;wherein the majority of said Stream 4D comprises said gas and at least one diluent;wherein said Stream 5C comprises a polyolefin rich stream;wherein the majority of said Stream 5C comprises at least one polyolefin;(3.8) transporting Stream 5B from said Purge Zone One through a Stream Zone 3A to an Agglomerating Zone One.wherein Stream 8 comprises a polyolefin rich stream wherein a majority of said Stream 8 comprises at least one polyolefin not suitable for agglomerating; andwherein Stream 9 comprises a polyolefin rich stream wherein a majority of said Stream 9 comprises at least one polyolefin suitable for agglomerating;(3.14) transporting Stream 9 from said Alternate Separating Zone through Stream Zone 8 to said Agglomerating Zone One.12. A process according to claim 1 wherein said Separation Zone One further comprises an Alternate Separating Zone.13. A process according to claim 12 wherein said Alternate Separating Zone comprises the following process steps:(3.12) transporting at least a portion of Stream 3 from said Mixing Zone One through Stream Zone 5 to said Alternate Separating Zone;(3.13) separating Stream 3 in said Alternate Separating Zone into Stream 7, Stream 8, and Stream 9;wherein Stream 7 comprises a polyolefin lean stream wherein a majority of said Stream 7 comprises at least one diluent;wherein Stream 8 comprises a polyolefin rich stream wherein a majority of said Stream 8 comprises at least one polyolefin not suitable for agglomerating; andwherein Stream 9 comprises a polyolefin rich stream wherein a majority of said Stream 9 comprises at least one polyolefin suitable for agglomerating;(3.14) transporting Stream 9 from said Alternate Separating Zone through Stream Zone 8 to said Agglomerating Zone One.14. A process comprising:introducing a catalyst deactivating agent into an olefin polymerization zone;wherein said olefin polymerization zone comprises a slurry polymerization reactor selected from the group consisting of a loop reactor and a stirred tank;thereafter passing polymerization zone effluent comprising deactivated catalyst, diluent and monomer to a separation zone;wherein said separation zone comprises at least one flash chamber;separating said polymerization zone effluent in said separation zone into a polyolefin lean stream comprising diluent and a polyolefin rich stream; andpassing said polyolefin rich stream to an extrusion zone.15. A process according to claim 14 wherein said polyolefin rich stream is passed directly from said separation zone to said extrusion zone.16. A process according to claim 14 wherein said separation zone comprises a high pressure separating zone and wherein said polyolefin rich stream is passed directly from said high pressure separating zone to a purge zone and then directly to said extrusion zone.

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Process for producing polyolefins

초록

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Process for producing polyolefins

초록

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이 특허에 인용된 특허 (20)

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