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US5616665A
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Supported polymerization catalyst systems, their production and use
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1996-01-16
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Granted: 1997-04-01
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Expires: 2016-01-16
Abstract
Abstract This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst able to produce polymers having broader molecular weight distribution and a higher molecular weight. Not only are such polymers easily processable as compared with metallocene polymers produced with other support methods but the methods of this invention provides for a supported catalyst with increased activity.
Inventors
- 👤 Moses O. Jejelowo
- 👤 Robert L. Bamberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:46
CPC Classifications
C; C08; C08F; C08F10/00; C08F210/00; C08F210/16; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/639; C08F4/63904; C08F4/63908; C08F4/63912; C08F4/63916; C08F4/6392; C08F4/64; C08F4/659; C08F4/6592; C08F4/65922; C08F4/65925; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
A process for polymerizing olefins alone or in combination with one or more other olefins, said process comprising polymerizing in the presence of a supported catalyst system, said supported catalyst system prepared by the method comprising the steps of: a) contacting a porous inorganic carrier having labile protons with an organometallic compound; b) adding at least one metallocene of Group 4, 5, or 6; and c) introducing a cocatalyst or an activator for said metallocene, wherein the mole ratio of the organometallic compound to the labile protons is less than 2:1.
Claim 2
Dependent Claim
91 words
A process for polymerizing olefins alone or in combination with one or more other olefins, said process comprising polymerizing in the presence of a supported catalyst system, said supported catalyst system prepared by the method comprising the steps of: a) contacting a porous inorganic carrier having labile protons with an organometallic compound; b) adding at least one metallocene of Group 4, 5, or 6; and c) introducing a cocatalyst or an activator for said metallocene, wherein the mole ratio of the organometallic compound to the labile protons is less than 2:1.
Claim 3
Dependent Claim
22 words
The process according to claim 1 wherein said cocatalyst or activator is an alumoxane or an ionic activator or a combination thereof.
Claim 4
Dependent Claim
14 words
The process according to claim 1 wherein said organometallic compound is an aluminum alkyl.
Claim 5
Dependent Claim
35 words
The process according to claim 1 wherein said organometallic compound is selected from the group consisting of aluminum alkyls, magnesium alkyls, magnesium alkyl halides, lithium alkyls and silicon alkyls, silicon alkoxides and silicon alkyl halides.
Claim 6
Dependent Claim
14 words
The process according to claim 1 wherein said porous carrier is an inorganic oxide.
Claim 7
Dependent Claim
179 words
The process according to claim 1 wherein said metallocene is represented by the formulas: (C.sub.5 R'.sub.m).sub.p R".sub.s (C.sub.5 R'.sub.m)MeQ.sub.3-p or R".sub.s (C.sub.5 R'.sub.m).sub.2 MeQ' wherein Me is a Group 4, 5, or 6 transition metal, C 5 R' m is a substituted cyclopentadienyl, each R', which can be the same or different is hydrogen, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two carbon atoms joined together to form a part of a C 4 to C 6 ring, R" a carbon, a germanium, a silicon, a phosphorous or a nitrogen containing radical substituting on and bridging two (C 5 R' m ) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1.
Claim 8
Dependent Claim
17 words
The process according to claim 1 wherein said porous carrier is silica, or alumina or mixtures thereof.
Claim 9
Dependent Claim
31 words
The process of claim 1 wherein the mole ratio of said organometallic compound to the labile protons of said carrier is in the range of from about 0.9:1 to about 2:1.
Claim 10
Dependent Claim
24 words
The process according to claim 1 wherein the mole ratio of the labile protons of said carrier to said organometallic compound is about 1:1.
Claim 11
Dependent Claim
27 words
The process according to claim 1 wherein the labile protons of said carrier is selected from the group consisting of a hydroxide groups and a water groups.
References Cited (Backward Citations)
EP0279863B1
Cited
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