[미국특허]
Silica-coated alumina activator-supports for metallocene catalyst compositions
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-210/16
C08F-010/02
C08F-110/02
C08F-210/06
C08F-210/08
C08F-004/02
C01B-033/26
B01J-027/00
B01J-027/053
B01J-027/10
B01J-027/12
B01J-027/16
B01J-031/14
B01J-031/16
B01J-031/18
B01J-031/22
B01J-035/00
C08F-004/659
C08F-004/6592
출원번호
US-0494674
(2017-04-24)
등록번호
US-10239975
(2019-03-26)
발명자
/ 주소
McDaniel, Max P.
Yang, Qing
Muninger, Randy S.
Benham, Elizabeth A.
Clear, Kathy S.
출원인 / 주소
Chevron Phillips Chemical Company LP
대리인 / 주소
Merchant & Gould P.C.
인용정보
피인용 횟수 :
0인용 특허 :
108
초록▼
Silica-coated alumina activator-supports, and catalyst compositions containing these activator-supports, are disclosed. Methods also are provided for preparing silica-coated alumina activator-supports, for preparing catalyst compositions, and for using the catalyst compositions to polymerize olefins
Silica-coated alumina activator-supports, and catalyst compositions containing these activator-supports, are disclosed. Methods also are provided for preparing silica-coated alumina activator-supports, for preparing catalyst compositions, and for using the catalyst compositions to polymerize olefins.
대표청구항▼
1. A catalyst composition comprising: (a) a metallocene compound; and(b) an activator-support comprising a silica-coated alumina treated with an electron-withdrawing anion, wherein:the silica-coated alumina has a weight ratio of alumina to silica in a range from about 1.2:1 to about 25:1,the electro
1. A catalyst composition comprising: (a) a metallocene compound; and(b) an activator-support comprising a silica-coated alumina treated with an electron-withdrawing anion, wherein:the silica-coated alumina has a weight ratio of alumina to silica in a range from about 1.2:1 to about 25:1,the electron-withdrawing anion comprises chloride, bromide, phosphate, triflate, sulfate, or any combination thereof, anda catalyst activity of the catalyst composition comprising the activator-support is greater than that of a catalyst system containing a silica-alumina treated with the electron-withdrawing anion, under the same polymerization conditions. 2. The catalyst composition of claim 1, wherein the amount of the metallocene compound in the catalyst composition is in a range from about 0.5 to about 150 micromoles of the metallocene compound per gram of the activator-support. 3. The catalyst composition of claim 1, wherein: the weight ratio of alumina to silica is in a range from about 1.5:1 to about 15:1; andthe activator-support further comprises zinc. 4. The catalyst composition of claim 1, wherein: the weight ratio of alumina to silica is in a range from about 1.5:1 to about 4:1;the electron-withdrawing anion comprises phosphate; andthe catalyst composition further comprises a co-catalyst. 5. The catalyst composition of claim 1, wherein: a catalyst activity of the catalyst composition is greater than about 1000 grams of polyethylene per gram of activator-support per hour under slurry polymerization conditions, using isobutane as a diluent, with a polymerization temperature of 90° C. and a reactor pressure of 420 psig; anda catalyst activity of the catalyst composition is greater than about 25,000 grams of polyethylene per gram of metallocene compound per hour under slurry polymerization conditions, using isobutane as a diluent, with a polymerization temperature of 90° C. and a reactor pressure of 420 psig. 6. The catalyst composition of claim 1, the catalyst activity of the catalyst composition comprising the activator-support is at least twice that of the catalyst system containing the silica-alumina treated with the electron-withdrawing anion, under the same polymerization conditions. 7. The catalyst composition of claim 1, wherein the metallocene compound comprises a bridged cyclopentadienyl-fluorenyl metallocene compound, an unbridged bis-cyclopentadienyl metallocene compound, an unbridged cyclopentadienyl-indenyl metallocene compound, or a combination thereof. 8. The catalyst composition of claim 1, wherein the catalyst composition comprises two metallocene compounds. 9. An olefin polymerization process, the process comprising: contacting the catalyst composition of claim 1 with an olefin monomer and optionally an olefin comonomer to produce an olefin polymer. 10. The process of claim 9, wherein the catalyst composition in contacted with ethylene and an olefin comonomer comprising propylene, 1-butene, 1-hexene, 1-octene, or a combination thereof. 11. The process of claim 9, wherein the olefin polymer comprises an ethylene polymer characterized by: less than about 5 long chain branches (LCB) per million total carbon atoms; anda CY-a parameter in a range from about 0.4 to about 0.7. 12. A catalyst composition comprising: (a) a metallocene compound;(b) an activator-support comprising a silica-coated alumina treated with an electron-withdrawing anion; and(c) an organoaluminum compound comprising trimethylaluminum, triethylaluminum, tri-n-propylaluminum, tri-n-butylaluminum, triisobutylaluminum, tri-n-hexylaluminum, tri-n-octylaluminum, diisobutylaluminum hydride, diethylaluminum ethoxide, diethylaluminum chloride, or any combination thereof; wherein:the silica-coated alumina has a weight ratio of alumina to silica in a range from about 1.2:1 to about 25:1,the electron-withdrawing anion comprises chloride, bromide, phosphate, triflate, sulfate, or any combination thereof, anda catalyst activity of the catalyst composition comprising the activator-support is greater than that of a catalyst system containing a silica-alumina treated with the electron-withdrawing anion, under the same polymerization conditions. 13. The catalyst composition of claim 12, wherein the amount of the metallocene compound in the catalyst composition is in a range from about 1 to about 120 micromoles of the metallocene compound per gram of the activator-support. 14. The catalyst composition of claim 12, wherein: the weight ratio of alumina to silica is in a range from about 1.5:1 to about 15:1; andthe activator-support further comprises zinc. 15. The catalyst composition of claim 12, wherein: the catalyst activity of the catalyst composition comprising the activator-support is at least about 3 times that of the catalyst system containing the silica-alumina treated with the electron-withdrawing anion, under the same polymerization conditions; andthe weight ratio of alumina to silica is in a range from about 1.5:1 to about 4:1. 16. The catalyst composition of claim 12, wherein: a catalyst activity of the catalyst composition is greater than about 1000 grams of polyethylene per gram of activator-support per hour under slurry polymerization conditions, using isobutane as a diluent, with a polymerization temperature of 90° C. and a reactor pressure of 420 psig; anda catalyst activity of the catalyst composition is greater than about 25,000 grams of polyethylene per gram of metallocene compound per hour under slurry polymerization conditions, using isobutane as a diluent, with a polymerization temperature of 90° C. and a reactor pressure of 420 psig. 17. The catalyst composition of claim 12, wherein the metallocene compound comprises a bridged cyclopentadienyl-fluorenyl metallocene compound, an unbridged bis-cyclopentadienyl metallocene compound, an unbridged cyclopentadienyl-indenyl metallocene compound, or a combination thereof. 18. The catalyst composition of claim 12, wherein the catalyst composition comprises two metallocene compounds. 19. An olefin polymerization process, the process comprising: contacting the catalyst composition of claim 12 with an olefin monomer and optionally an olefin comonomer to produce an olefin polymer. 20. The process of claim 19, wherein the catalyst composition is contacted with ethylene and an olefin comonomer comprising propylene, 1-butene, 1-hexene, 1-octene, or a combination thereof. 21. A catalyst composition comprising: (a) a metallocene compound; and(b) an activator-support comprising a silica-coated alumina treated with an electron-withdrawing anion, wherein:the silica-coated alumina has a weight ratio of alumina to silica in a range from about 1:1 to about 2:1, andthe electron-withdrawing anion comprises chloride, bromide, phosphate, triflate, sulfate, or any combination thereof. 22. The catalyst composition of claim 21, wherein: the weight ratio of alumina to silica is in a range from about 1.2:1 to about 1.8:1; andthe catalyst composition further comprises an organoaluminum co-catalyst. 23. The catalyst composition of claim 22, wherein a catalyst activity of the catalyst composition comprising the activator-support is at least twice than that of a catalyst system containing a silica-alumina treated with the electron-withdrawing anion, under the same polymerization conditions.
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