[미국특허]
Methods for increasing polymer production rates with halogenated hydrocarbon compounds
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-110/14
B01J-019/06
B01J-019/24
C08F-110/02
C08F-210/16
C08F-002/01
C08F-002/38
C08F-010/00
C08F-004/659
출원번호
US-0960624
(2018-04-24)
등록번호
US-10167353
(2019-01-01)
발명자
/ 주소
Ding, Errun
Beaulieu, William B.
출원인 / 주소
Chevron Phillips Chemical Company LP
대리인 / 주소
Conley Rose, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
124
초록
Methods for controlling the productivity of an olefin polymer in a polymerization reactor system using a halogenated hydrocarbon compound are disclosed. The productivity of the polymer can be increased via the addition of the halogenated hydrocarbon compound.
대표청구항▼
1. A process for producing an ethylene polymer at a target productivity, the process comprising: (a) contacting a metallocene-based catalyst system with ethylene and an optional α-olefin comonomer in a polymerization reactor system under polymerization conditions; and(b) controlling an amount of a h
1. A process for producing an ethylene polymer at a target productivity, the process comprising: (a) contacting a metallocene-based catalyst system with ethylene and an optional α-olefin comonomer in a polymerization reactor system under polymerization conditions; and(b) controlling an amount of a halogenated hydrocarbon compound introduced into the polymerization reactor system to produce the ethylene polymer at the target productivity;wherein the metallocene-based catalyst system comprises at least one metallocene compound. 2. The process of claim 1, wherein: the metallocene-based catalyst system comprises one or two metallocene compounds, an activator, and an optional co-catalyst; andthe activator comprises an aluminoxane compound, an organoboron or organoborate compound, an ionizing ionic compound, an activator-support, or any combination thereof. 3. The process of claim 1, wherein: the metallocene-based catalyst system comprises one or two metallocene compounds, an activator, and an organoaluminum co-catalyst; andthe activator comprises an aluminoxane compound, an organoboron or organoborate compound, an ionizing ionic compound, an activator-support, or any combination thereof. 4. The process of claim 3, wherein the activator comprises the activator-support, the activator-support comprising a fluorided solid oxide, a sulfated solid oxide, or a combination thereof. 5. The process of claim 1, wherein: a productivity of the ethylene polymer increases as the amount of the halogenated hydrocarbon compound added to the polymerization reactor system increases;the halogenated hydrocarbon compound comprises a halogenated aromatic compound, a halogenated alkane compound, or a combination thereof; andthe ethylene polymer comprises an ethylene homopolymer, an ethylene/1-butene copolymer, an ethylene/1-hexene copolymer, or an ethylene/1-octene copolymer. 6. The method of claim 1, wherein the polymerization reactor system comprises multiple reactors. 7. The method of claim 1, wherein the polymerization reactor system comprises: a loop slurry reactor and a gas phase reactor;multiple loop slurry reactors; ormultiple gas phase reactors. 8. A method of controlling a polymerization reaction in a polymerization reactor system, the method comprising: (i) contacting a transition metal-based catalyst system with ethylene and an optional α-olefin comonomer in the polymerization reactor system under polymerization conditions to produce an ethylene polymer, wherein the polymerization reactor system comprises a loop slurry reactor; and(ii) introducing an amount of a halogenated hydrocarbon compound into the polymerization reactor system to increase a productivity of the ethylene polymer;wherein the halogenated hydrocarbon compound is a liquid under the polymerization conditions in the loop slurry reactor, and has a boiling point, at standard temperature and pressure, in a range from 25° C. to 100° C. 9. The method of claim 8, wherein the halogenated hydrocarbon compound comprises perfluorohexane, hexafluorobenzene, or both. 10. The method of claim 8, wherein the transition metal-based catalyst system is a chromium-based catalyst system, a Ziegler-Natta based catalyst system, a metallocene-based catalyst system, or a combination thereof. 11. The method of claim 8, wherein: the introduction of the halogenated hydrocarbon compound into the polymerization reactor system increases the productivity of the ethylene polymer by from about 10% to about 150%; andthe transition metal-based catalyst system is contacted with ethylene and a comonomer comprising 1-butene, 1-hexene, 1-octene, or a mixture thereof. 12. The method of claim 8, wherein: the transition metal-based catalyst system is a Ziegler-Natta based catalyst system; andthe ethylene polymer comprises an ethylene homopolymer, an ethylene/1-butene copolymer, an ethylene/1-hexene copolymer, or an ethylene/1-octene copolymer. 13. The method of claim 8, wherein the polymerization reactor system comprises multiple reactors. 14. The method of claim 13, wherein the transition metal-based catalyst system is a Ziegler-Natta based catalyst system. 15. The method of claim 12, wherein the introduction of the halogenated hydrocarbon compound into the polymerization reactor system increases the productivity of the ethylene polymer by from about 20% to about 250%. 16. A method of controlling a polymerization reaction in a polymerization reactor system, the method comprising: (i) contacting a transition metal-based catalyst system with ethylene and an optional α-olefin comonomer in the polymerization reactor system under polymerization conditions to produce an ethylene polymer; and(ii) introducing an amount of a halogenated hydrocarbon compound into the polymerization reactor system to increase a productivity of the ethylene polymer;wherein: the polymerization reactor system comprises a loop slurry reactor;the transition metal-based catalyst system is a chromium-based catalyst system; andthe halogenated hydrocarbon compound is a liquid under the polymerization conditions in the loop slurry reactor. 17. The method of claim 16, wherein the polymerization reactor system comprises multiple reactors. 18. The method of claim 16, wherein the introduction of the halogenated hydrocarbon compound into the polymerization reactor system increases the productivity of the ethylene polymer by from about 10% to about 100%. 19. The method of claim 16, wherein the ethylene polymer comprises an ethylene homopolymer, an ethylene/1-butene copolymer, an ethylene/1-hexene copolymer, or an ethylene/1-octene copolymer. 20. The method of claim 16, wherein the halogenated hydrocarbon compound comprises perfluorohexane, hexafluorobenzene, or both. 21. The method of claim 16, wherein the percent solids in the loop slurry reactor are in a range from about 30 wt. % to about 55 wt. %.
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