Polymerization product pressures in olefin polymerization
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-002/00
C08F-210/00
B01J-019/00
C08F-010/02
출원번호
US-0439332
(2017-02-22)
등록번호
US-9809660
(2017-11-07)
발명자
/ 주소
Hottovy, John D.
Kufeld, Scott E.
Mutchler, Joel A.
출원인 / 주소
Chevron Phillips Chemical Company, LP
대리인 / 주소
Conley Rose, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
47
초록▼
A process for making a low density polymer in a polymerization reactor system, the process comprising polymerizing an olefin monomer, and optionally an olefin comonomer, in the presence of a diluent in a polymerization reactor to make a polymerization product slurry consisting of a liquid phase and
A process for making a low density polymer in a polymerization reactor system, the process comprising polymerizing an olefin monomer, and optionally an olefin comonomer, in the presence of a diluent in a polymerization reactor to make a polymerization product slurry consisting of a liquid phase and a solid phase, wherein the solid phase comprises an olefin polymer having a density of between about 0.905 g/cm3 to about 0.945 g/cm3; and discharging the polymerization product slurry from the polymerization reactor through a continuous take-off valve to make a mixture further comprising a vapor phase. The mixture comprises a pressure less than a bubble point pressure of a component in the polymerization product slurry.
대표청구항▼
1. A process for pressure management of a polymerization product comprising a liquid phase and a solid phase, the process comprising: reducing, at a location downstream of a polymerization reactor and upstream of a flashline heater, a pressure of the polymerization product to less than a bubble poin
1. A process for pressure management of a polymerization product comprising a liquid phase and a solid phase, the process comprising: reducing, at a location downstream of a polymerization reactor and upstream of a flashline heater, a pressure of the polymerization product to less than a bubble point pressure of at least one component of the liquid phase. 2. The process of claim 1, wherein at least a portion of the liquid phase vaporizes to yield a vaporized portion of the liquid phase. 3. The process of claim 1, wherein the flashline heater is upstream of a separation vessel. 4. The process of claim 1, wherein the at least one component of the liquid phase comprises isobutane; ethylene; a comonomer comprising one or more of propylene, 1-butene, 1-hexene, and 1-octene; or combinations thereof. 5. The process of claim 1, wherein the location is within or downstream of a continuous take-off valve and is upstream of the flashline heater. 6. The process of claim 5, wherein the continuous take-off valve has a nominal diameter of about 1 inch to about 8 inches. 7. The process of claim 5, wherein the continuous take-off valve comprises more than one valve. 8. A process for pressure management of a polymerization product comprising a liquid phase and a solid phase, the process comprising: reducing, using a continuous take-off valve positioned downstream of a polymerization reactor and upstream of a flashline heater, a pressure of the polymerization product to less than a bubble point pressure of at least one component of the liquid phase. 9. The process of claim 8, wherein at least a portion of the liquid phase vaporizes to yield a vaporized portion of the liquid phase. 10. The process of claim 8, wherein the at least one component of the liquid phase comprises isobutane; ethylene; a comonomer comprising one or more of propylene, 1-butene, 1-hexene, and 1-octene; or combinations thereof. 11. The process of claim 8, wherein the continuous take-off valve has a nominal diameter of about 1 inch to about 8 inches. 12. The process of claim 8, wherein the continuous take-off valve comprises more than one valve. 13. The process of claim 8, wherein the solid phase comprises linear low-density polyethylene. 14. A process for pressure management of a polymerization product comprising about 0.001% to about 4% ethane by total weight of a liquid phase of the polymerization product, the process comprising: reducing a pressure of the polymerization product to less than a bubble point pressure of at least one component of the liquid phase of the polymerization product such that at least a portion of the liquid phase vaporizes to yield a vapor phase comprising a vaporized portion of the liquid phase and the ethane,wherein the step of reducing is performed at a location downstream of a polymerization reactor and upstream of a flashline heater. 15. The process of claim 14, wherein the flashline heater is upstream of a separation vessel. 16. The process of claim 14, wherein the location is within or downstream of a continuous take-off valve and is upstream of the flashline heater. 17. The process of claim 16, wherein the continuous take-off valve has a nominal diameter of about 1 inch to about 8 inches. 18. The process of claim 17, wherein the continuous take-off valve comprises more than one valve. 19. The process of claim 14, wherein the at least one component of the liquid phase comprises isobutane; ethylene; a comonomer comprising one or more of propylene, 1-butene, 1-hexene, and 1-octene; or combinations thereof. 20. The process of claim 14, wherein the polymerization product comprises linear low-density polyethylene.
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이 특허에 인용된 특허 (47)
Jensen, Michael D.; Hawley, Gil R.; McDaniel, Max P.; Crain, Tony; Benham, Elizabeth A.; Martin, Joel L.; Yang, Qing, Acidic activator-supports and catalysts for olefin polymerization.
Hottovy John D. (Bartlesville OK) Lawrence Frederick C. (Bartlesville OK) Lowe Barry W. (Bartlesville OK) Fangmeier James S. (Bartlesville OK), Apparatus and method for producing ethylene polymer.
Kiss, Gabor; Reynolds, Jr., Robert Patrick; Chu, John W.; Rucker, Steven P.; Lattner, James Richardson, Bulk homogeneous polymerization process for ethylene propylene copolymers.
Verser, Donald W.; Burns, David H.; Hein, James E.; Rajaendran, George K.; Hottovy, John D., Continuous withdrawal from high solids slurry polymerization.
Yang, Qing; Jayaratne, Kumudini C.; Jensen, Michael D.; McDaniel, Max P.; Martin, Joel L.; Thorn, Matthew G.; Lanier, Jerry T.; Crain, Tony R., Dual metallocene catalysts for polymerization of bimodal polymers.
Yang, Qing; Jayaratne, Kumudini C.; Jensen, Michael D.; McDaniel, Max P.; Martin, Joel L.; Thorn, Matthew G.; Lanier, Jerry T.; Crain, Tony R., Dual metallocene catalysts for polymerization of bimodal polymers.
Hottovy John D. ; Hensley Harvey D. ; Przelomski David J. ; Cymbaluk Teddy H. ; Franklin ; III Robert K. ; Perez Ethelwoldo P., High solids slurry polymerization.
Kiss, Gabor; Galuska, Alan Anthony; Reynolds, Jr., Robert Patrick; Chu, John W.; Chapman, Bryan R.; Brant, Patrick; Datta, Sudhin, In-line process for producing plasticized polymers and plasticized polymer blends.
Jenkins ; III John M. (So. Charleston WV) Jones Russell L. (Chapel Hill NC) Jones Thomas M. (So. Charleston WV) Beret Samil (Danville CA), Method for fluidized bed polymerization.
Rosch Joachim,DEX ; Bidell Wolfgang,DEX ; Langhauser Franz,DEX, Preparation of polymers of C.sub.2 -C.sub.12 -alkenes with the addition of a reaction retarder.
Kreischer Bruce E. ; Verser Donald W. ; Hein James E., Process and apparatus for recovering diluent, monomer, and comonomer from a polymerization reactor effluent.
Hanson Donald O. (Bartlesville OK), Process and apparatus for separating diluents from solid polymers utilizing a two-stage flash and a cyclone separator.
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