US4540757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization and catalyst
Assignee: Phillips Petroleum Co
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Filing: 1984-10-01
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Granted: 1985-09-10
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Expires: 2004-10-01
Abstract
Abstract Polymerization of olefins in the presence of a catalyst system comprising titanium-containing component (A) associated with a milled blend of at least two different silica-containing materials having different MI (polymer melt index) potentials in which at least one of the silicas has been treated with a chemical agent which reacts with OH groups on the surface of the silica and a dihydrocarbylmagnesium compound, and a cocatalyst component (B) comprising an organoaluminum compound. Ethylene polymers having broad molecular weight distribution are obtained using the catalysts defined herein.
Inventors
- 👤 Max P. McDaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:22
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
228 words
A process for the production of ethylene polymers having broad molecular weight distribution, which comprises contacting ethylene and mixtures of ethylene with minor amounts of at least one higher mono-1-olefin under polymerization conditions with a catalyst composition comprising: (a) a magnesium/titanium-containing catalyst component (A) supported on a milled blend of at least two different silica-containing materials which have different MI (polymer melt index) potentials in which at least two of the silica-containing materials have been chemically treated with different chemical agents with the further proviso that one of the silicas is reacted with a silating compound selected from the group consisting of (1) chlorosilanes having the formula R c 2 SiCl 4-c in which R 2 is phenyl or alkyl group of 1 to about 6 carbon atoms, and c is an integer of 1,2 or 3 and (b 2) diphenyl silanediol and at least one other of the silicas is reacted with a carboxylic acid chloride of the formula ##STR3## in which each G is selected from the group consisting of chlorine, alkyl of 1 to about 3 carbon atoms, hydrogen, and phenyl, with at least one G being chlorine, and (b) an organolauminum cocatalyst component (B) R".sub.n AlX.sub.n-3, wherein R" is a hydrocarbon radical having from 1 to about 20 carbon atoms, n is an integer of 0 to 3, and X is halogen or hydrogen.
Claim 2
Dependent Claim
228 words
A process for the production of ethylene polymers having broad molecular weight distribution, which comprises contacting ethylene and mixtures of ethylene with minor amounts of at least one higher mono-1-olefin under polymerization conditions with a catalyst composition comprising: (a) a magnesium/titanium-containing catalyst component (A) supported on a milled blend of at least two different silica-containing materials which have different MI (polymer melt index) potentials in which at least two of the silica-containing materials have been chemically treated with different chemical agents with the further proviso that one of the silicas is reacted with a silating compound selected from the group consisting of (1) chlorosilanes having the formula R c 2 SiCl 4-c in which R 2 is phenyl or alkyl group of 1 to about 6 carbon atoms, and c is an integer of 1,2 or 3 and (b 2) diphenyl silanediol and at least one other of the silicas is reacted with a carboxylic acid chloride of the formula ##STR3## in which each G is selected from the group consisting of chlorine, alkyl of 1 to about 3 carbon atoms, hydrogen, and phenyl, with at least one G being chlorine, and (b) an organolauminum cocatalyst component (B) R".sub.n AlX.sub.n-3, wherein R" is a hydrocarbon radical having from 1 to about 20 carbon atoms, n is an integer of 0 to 3, and X is halogen or hydrogen.
Claim 3
Dependent Claim
53 words
A process according to claim 1 wherein each silica is contacted with dihydrocarbylmagnesium compound and titanium compound before blending with another silica similarly treated with dihydrocarbylmagnesium and titanium compounds and then the mixture of different silicas is subjected to intensive milling to form an intimate blend of the silica, magnesium and titanium compounds.
Claim 4
Dependent Claim
31 words
A process according to claim 1 wherein said silicas are blended and intensively milled to produce an intimate milled mixture of silicas prior to contacting with said magnesium and titanium compounds.
Claim 5
Dependent Claim
24 words
A process according to claim 1 wherein said magnesium compound is dibutylmagnesium, said titanium compound is titanium tetrachloride, and said organoaluminum compound is triisobutylaluminum.
Claim 6
Dependent Claim
25 words
A process according to claim 4 wherein one silica has been treated with diphenyl silanediol and a second silica has been treated with dichloroacetyl chloride.
Claim 7
Dependent Claim
11 words
A process according to claim 5 wherein said monomer comprises ethylene.
Claim 8
Dependent Claim
24 words
A process according to claim 2 wherein said magnesium compound is dibutylmagnesium, said titanium compound is titanium tetrachloride, and said organoaluminum compound is triisobutylaluminum.
Claim 9
Dependent Claim
190 words
A solid polymerization magnesium/titanium-containing catalyst component prepared by mixing (a) a silica support comprising a blend of at least two silica-containing components having different MI (polymer melt index) potentials in which at least two of the silicas have been chemically treated with different agents which react with part or substantially all of the OH groups on the surface of the silica with the further proviso that one of the silicas is reacted with a silating compound slected from the group consisting of (1) chlorosilanes having the formula R c 2 SiCl 4-c in which R 2 is phenyl or alkyl group of 1 to about 6 carbon atoms, and c is an integer of 1,2 or 3 and (2) diphenyl silanediol and at least one other of the silicas is reacted with a carboxylic acid chloride of the formula ##STR4## in which each G is selected from the group consisting of chlorine, alkyl of 1 to about 3 carbon atoms, hydrogen, and phenyl, with at least one G being chlorine, (b) a dihydrocarbylmagnesium compound, (c) a halogenated tetravalent titanium compound, and (d) a cocatalyst component (B) comprising an organoaluminum compound.
Claim 10
Dependent Claim
190 words
A solid polymerization magnesium/titanium-containing catalyst component prepared by mixing (a) a silica support comprising a blend of at least two silica-containing components having different MI (polymer melt index) potentials in which at least two of the silicas have been chemically treated with different agents which react with part or substantially all of the OH groups on the surface of the silica with the further proviso that one of the silicas is reacted with a silating compound slected from the group consisting of (1) chlorosilanes having the formula R c 2 SiCl 4-c in which R 2 is phenyl or alkyl group of 1 to about 6 carbon atoms, and c is an integer of 1,2 or 3 and (2) diphenyl silanediol and at least one other of the silicas is reacted with a carboxylic acid chloride of the formula ##STR4## in which each G is selected from the group consisting of chlorine, alkyl of 1 to about 3 carbon atoms, hydrogen, and phenyl, with at least one G being chlorine, (b) a dihydrocarbylmagnesium compound, (c) a halogenated tetravalent titanium compound, and (d) a cocatalyst component (B) comprising an organoaluminum compound.
Claim 11
Dependent Claim
14 words
A composition according to claim 8 wherein said titanium compound is a titanium tetrahalide.
Claim 12
Dependent Claim
19 words
A composition according to claim 8 wherein said magnesium compound is dibutylmagnesium and said titanium compound is titanium tetrachloride.
Claim 13
Dependent Claim
15 words
A composition according to claim 10 which additionally contains a cocatalyst component (B) comprising triisobutylaluminum.
Claim 14
Dependent Claim
25 words
A composition according to claim 11 wherein one silica has been treated with diphenyl silanediol and a second silica has been treated with dichloroacetyl chloride.
Claim 15
Dependent Claim
204 words
A process of producing a polymerization catalyst which comprises a milled catalyst component (A) formed from (1) a blend of at least two different silica-containing having differnt MI (polymer melt index) potentials in which at least two of the silicas have been chemically treated with different agents which react with part or substantially all of the OH groups on the surface of the silica with the further proviso that one of the silicas is reacted with a silating compound selected from the group consisting of (1) chlorosilanes having the formula R c 2 SiCl 4-c in which R 2 is phenyl or alkyl group of 1 to about 6 carbon atoms, and c is an integer of 1,2 or 3 and (2) diphenyl silanediol and at least one other of the silicas is reacted with a carboxylic acid chloride of the formula ##STR5## in which each G is selected from the group consisting of chlorine, alkyl of 1 to about 3 carbon atoms, hydrogen, and phenyl, with at least one G being chlorine, and (2) dihydrocarbylmagnesium compound, and (3) a halogenated tetravalent titanium compound, isolating and purifying the product forming component (A), and (4) combining purified component (A) with an organoaluminum cocatalyst component (B).
Claim 16
Dependent Claim
204 words
A process of producing a polymerization catalyst which comprises a milled catalyst component (A) formed from (1) a blend of at least two different silica-containing having differnt MI (polymer melt index) potentials in which at least two of the silicas have been chemically treated with different agents which react with part or substantially all of the OH groups on the surface of the silica with the further proviso that one of the silicas is reacted with a silating compound selected from the group consisting of (1) chlorosilanes having the formula R c 2 SiCl 4-c in which R 2 is phenyl or alkyl group of 1 to about 6 carbon atoms, and c is an integer of 1,2 or 3 and (2) diphenyl silanediol and at least one other of the silicas is reacted with a carboxylic acid chloride of the formula ##STR5## in which each G is selected from the group consisting of chlorine, alkyl of 1 to about 3 carbon atoms, hydrogen, and phenyl, with at least one G being chlorine, and (2) dihydrocarbylmagnesium compound, and (3) a halogenated tetravalent titanium compound, isolating and purifying the product forming component (A), and (4) combining purified component (A) with an organoaluminum cocatalyst component (B).
Claim 17
Dependent Claim
32 words
A process according to claim 13 wheein said silicas are admixed and subjected to intensive milling to form an intimate mixture thereof prior to contacting with said magnesium and said titanium compounds.
Claim 18
Dependent Claim
54 words
A process according to claim 13 wherein each of said silicas forming catalyst component (A) is first treated with said magnesium and said titanium compounds prior to admixing with another silica which has been similarly treated, and combining the resulting treated silicas and subjecting same to intensive milling to form an intimate mixture thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |