Polymerization product pressures in olefin polymerization
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-210/00
C08F-002/00
C08F-110/02
B01J-019/00
C08F-210/14
출원번호
US-0886893
(2013-05-03)
등록번호
US-8871886
(2014-10-28)
발명자
/ 주소
Hottovy, John D.
Kufeld, Scott E.
출원인 / 주소
Chevron Phillips Chemical Company LP
대리인 / 주소
Conley Rose, P.C.
인용정보
피인용 횟수 :
8인용 특허 :
25
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 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
1. 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; anddischarging the polymerization product slurry from the polymerization reactor through a continuous take-off valve to make a mixture further comprising a vapor phase upstream of a flashline heater, wherein the flashline heater is upstream of a separation vessel,wherein the mixture comprises, at least at one location upstream of the separation vessel, a pressure less than a bubble point pressure of a component in the polymerization product slurry. 2. The process of claim 1, wherein the component is the diluent. 3. The process of claim 1, wherein the component is the comonomer. 4. The process of claim 1, wherein a location of the mixture is downstream of the continuous take-off valve. 5. The process of claim 4, wherein the location of the mixture is upstream of a heat zone in a flashline heater. 6. The process of claim 1, wherein the vapor phase comprises ethylene, isobutane, ethane, hydrogen, or combinations thereof. 7. The process of claim 1, wherein the vapor phase comprises a vaporized portion of the liquid phase. 8. The process of claim 1, wherein the liquid phase comprises the diluent, the monomer, the comonomer, or combinations thereof. 9. The process of claim 8, wherein the diluent comprises isobutane, wherein the monomer comprises ethylene, wherein the comonomer comprises propylene, 1-butene, 1-hexene, 1-octene, or combinations thereof. 10. The process of claim 1, further comprising: conveying the mixture downstream of the continuous take-off valve at a temperature less than a melting temperature of the olefin polymer. 11. The process of claim 1, wherein the olefin polymer comprises polyethylene. 12. The process of claim 11, wherein the olefin polymer further comprises a copolymer. 13. The process of claim 1, wherein the olefin polymer comprises a linear low-density polyethylene. 14. The process of claim 1, wherein the continuous take-off valve has a nominal diameter of about 1 inch to about 8 inches. 15. A process for pressure management of a polymerization product slurry withdrawn from a loop polymerization reactor in slurry polymerization, the process comprising: conveying the polymerization product slurry through a continuous take-off valve;converting the polymerization product slurry to a mixture upstream of a flashline heater, wherein the flash line heater is upstream of a vapor-liquid separator, wherein the mixture comprises at least a portion of the liquid phase, the solid phase, and a vapor phase; andconveying the mixture through the flashline heater;wherein, at least at one location downstream of the continuous take-off valve and upstream of a vapor-liquid separator, the mixture comprises a pressure less than a bubble point pressure of the liquid phase. 16. The process of claim 15, wherein the liquid phase comprises a diluent, unreacted monomer, unreacted comonomers, or combinations thereof. 17. The process of claim 16, wherein the diluent comprises isobutane, wherein the unreacted monomer comprises ethylene, wherein the unreacted comonomer comprises propylene, 1-butene, 1-hexene, 1-octene, or combinations thereof. 18. The process of claim 15, wherein the vapor phase comprises a vaporized portion of the liquid phase. 19. The process of claim 15, wherein the solid phase comprises a solid polymer. 20. The process of claim 19, further comprising: conveying the mixture through the flashline heater at a temperature less than a melting temperature of the solid polymer. 21. The process of claim 19, wherein the solid polymer comprises polyethylene. 22. The process of claim 21, wherein the solid polymer further comprises a polyethylene copolymer. 23. The process of claim 21, wherein the polyethylene comprises a density in the range of about 0.905 g/cm3 to about 0.945 g/cm3. 24. The process of claim 21, wherein the polyethylene comprises a linear low-density polyethylene. 25. The process of claim 15, wherein the continuous take-off valve has a nominal diameter of about 1 inch to about 8 inches.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (25)
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.
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.
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.
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.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.