[미국특허]
Silica-coated alumina activator-supports for metallocene catalyst compositions
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-004/06
C08F-004/44
C08F-010/02
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
C08F-110/02
C08F-210/16
출원번호
US-0980415
(2010-12-29)
등록번호
US-9346896
(2016-05-24)
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 :
12인용 특허 :
101
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) at least one metallocene compound; and(b) at least one activator-support;wherein the at least one activator-support comprises at least one silica-coated alumina treated with at least one electron-withdrawing anion, wherein:the at least one silica-coated alum
1. A catalyst composition comprising: (a) at least one metallocene compound; and(b) at least one activator-support;wherein the at least one activator-support comprises at least one silica-coated alumina treated with at least one electron-withdrawing anion, wherein:the at least one silica-coated alumina has a weight ratio of alumina to silica in a range from about 1:1 to about 100:1,the at least one electron-withdrawing anion comprises fluoride, anda catalyst activity of the catalyst composition is greater than that of a catalyst system containing the at least one metallocene compound and a silica-alumina treated with the at least one electron-withdrawing anion, under the same polymerization conditions. 2. The catalyst composition of claim 1, wherein the weight ratio of alumina to silica is in a range from about 2:1 to about 20:1. 3. The catalyst composition of claim 1, wherein the at least one activator-support comprises at least one silica-coated alumina treated with at least two electron-withdrawing anions, and wherein the at least two electron-withdrawing anions comprise fluoride and phosphate or fluoride and sulfate. 4. The catalyst composition of claim 1, wherein the at least one silica-coated alumina has a surface area in a range from about 100 to about 1000 m2/g, a pore volume greater than about 0.5 mL/g, and a particle size in a range from about 5 microns to about 150 microns. 5. The catalyst composition of claim 1, wherein the at least one silica-coated alumina is produced by a process comprising: providing at least one alumina source, the at least one alumina source comprising an alumina, a hydrated alumina, aluminum hydroxide, boehmite, or a combination thereof;contacting the at least one alumina source with a solution or suspension comprising at least one solvent and at least one silicon-containing compound capable of producing silica upon calcination;depositing a coating of the at least one silicon-containing compound on at least a portion of the at least one alumina source; andremoving the solvent. 6. The catalyst composition of claim 1, further comprising at least one organoaluminum compound having the formula: Al(X9)m(X10)3-m;wherein: X9 is a hydrocarbyl;X10 is an alkoxide or an aryloxide, a halide, or a hydride; andm is from 1 to 3, inclusive. 7. The catalyst composition of claim 1, further comprising at least one optional co-catalyst, wherein the at least one optional co-catalyst is at least one aluminoxane compound, at least one organoboron or organoborate compound, at least one ionizing ionic compound, or any combination thereof. 8. The catalyst composition of claim 1, further comprising at least one optional activator-support, wherein the at least one optional activator-support is fluorided alumina, chlorided alumina, bromided alumina, sulfated alumina, fluorided silica-alumina, chlorided silica-alumina, bromided silica-alumina, sulfated silica-alumina, fluorided silica-zirconia, chlorided silica-zirconia, bromided silica-zirconia, sulfated silica-zirconia, fluorided silica-titania, or any combination thereof. 9. 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. 10. The catalyst composition of claim 1, wherein a 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. 11. The catalyst composition of claim 1, wherein the at least one metallocene compound comprises an ansa-metallocene compound. 12. The catalyst composition of claim 1, wherein the at least one metallocene compound comprises an unbridged metallocene compound. 13. A catalyst composition comprising: (a) at least one metallocene compound;(b) at least one activator-support; and(c) at least one organoaluminum compound;wherein the at least one organoaluminum compound comprises 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 at least one activator-support comprises at least one silica-coated alumina treated with at least one electron-withdrawing anion, wherein:the at least one silica-coated alumina has a weight ratio of alumina to silica in a range from about 1.5:1 to about 20:1,the at least one electron-withdrawing anion comprises fluoride,the at least one silica-coated alumina has a surface area in a range from about 250 to about 500 m2/g and a pore volume in a range from about 0.8 to about 1.7 mL/g, anda catalyst activity of the catalyst composition is greater than that of a catalyst system containing the at least one metallocene compound, the at least one organoaluminum compound, and a silica-alumina treated with the at least one electron-withdrawing anion, under the same polymerization conditions. 14. The catalyst composition of claim 13, wherein: the weight ratio of alumina to silica is in a range from about 2:1 to about 12:1. 15. The catalyst composition of claim 14, wherein the at least one metallocene compound comprises an ansa-metallocene compound. 16. The catalyst composition of claim 11, further comprising at least one organoaluminum compound. 17. The catalyst composition of claim 16, wherein the weight ratio of alumina to silica is in a range from about 1.2:1 to about 25:1. 18. The catalyst composition of claim 13, wherein: the at least one metallocene compound comprises an ansa-metallocene compound.
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