Patent US2956215A successfully refreshed from Google Patents.
Patent EP0132893A1 successfully refreshed from Google Patents.
EP0132893A1
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Olefin polymerization catalyst and process
Assignee: Stauffer Chemical Co
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Filing: 1984-07-20
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Granted: —
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Expires: 2004-07-20
Abstract
Abstract @ Isotactic index improvement is achieved for C 3 and higher alpha olefins in systems containing a catalyst component comprising titanium supported on a magnesium halide support. The titanium component is formed by copulverizing the magnesium halide with one or more eletron donor followed by treatment with liquid titanium halide. The improvement is achieved by using a dialkylaluminum monohalide component with the trialkylaluminum cocatalyst normally used. In non- slurry polymerizatins improvements in both activity and isotactic index have been achieved. In slurry polymerizations, the isotactic index of the polymer has been improved. It is possible to achieve a variable melt flow index for polypropylene while maintaining good isotactic index. Isotactic index is retained at high levels even though the temperature and/or time of polymerization is varied.
Inventors
- 👤 Elliot Isaac Band
- 👤 Michael Joseph Breen
- 👤 Robert Ivan Mink
- 👤 Francis Anthony Via
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 12:57
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/642; C08F4/6421; C08F10/00; C08F2/00; C08F2/38; C08F4/65; C08F4/652; C08F4/654; C08F4/6543; C08F4/659; C08F4/65912
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
109 words
A catalyst for the polymerization of alpha olefins of the formula CH 2 = CHR, where R is an alkyl radical of 1-6 carbon atoms and mixtures thereof with ethylene, comprising: (a) a component containing titanium on a magnesium halide support which is obtained by copulverizing magnesium halide with one or more electron donors to form a copulverized product followed by reacting the copulverized product with a liquid titanium compound containing halogen; and (b) an organoaluminum component comprising a trialkylaluminum compound in admixture with an effective amount of a dialkylaluminum monohalide component to give improved performance characteristics to the catalyst as compared to when the component consists of trialkylaluminum.
Claim 2
Dependent Claim
109 words
A catalyst for the polymerization of alpha olefins of the formula CH 2 = CHR, where R is an alkyl radical of 1-6 carbon atoms and mixtures thereof with ethylene, comprising: (a) a component containing titanium on a magnesium halide support which is obtained by copulverizing magnesium halide with one or more electron donors to form a copulverized product followed by reacting the copulverized product with a liquid titanium compound containing halogen; and (b) an organoaluminum component comprising a trialkylaluminum compound in admixture with an effective amount of a dialkylaluminum monohalide component to give improved performance characteristics to the catalyst as compared to when the component consists of trialkylaluminum.
Claim 3
Dependent Claim
14 words
A catalyst as claimed in Claim 1 wherein a phenol electron donor is copulverized.
Claim 4
Dependent Claim
15 words
A catalyst as claimed in Claim 1 wherein polysiloxane and phenol electron donors are copulverized.
Claim 5
Dependent Claim
23 words
A catalyst as claimed in Claim 1 wherein a phenol electron donor, polysiloxane, titanium tetrahalide and a carboxylic ester electron donor are copulverized.
Claim 6
Dependent Claim
16 words
A catalyst as claimed in Claim 1 wherein the liquid titanium compound containing halogen is TiCI4.
Claim 7
Dependent Claim
22 words
A catalyst as claimed in Claim 4 wherein the organoaluminum component comprises trialkylaluminum and a dialkylaluminum monohalide with a carboxylic ester donor.
Claim 8
Dependent Claim
16 words
A catalyst as claimed in Claim 1 wherein the organoaluminum component contains triethylaluminum and diethylaluminum chloride.
Claim 9
Dependent Claim
16 words
A catalyst as claimed in Claim 5 wherein the organoaluminum component contains triethylaluminum and diethylaluminum chloride.
Claim 10
Dependent Claim
113 words
In the polymerization of alpha olefins of the formula CH 2 = CHR, where R is an alkyl radical of 1-6 carbon atoms and mixtures thereof with ethylene, using as a catalyst: (a) a component containing titanium on a magnesium halide support which is obtained by copulverizing magnesium halide with one or more electron donors to form a copulverized product followed by reacting the copulverized product with a liquid titanium compound containing halogen, and (b) a trialkylaluminum component wherein the improvement comprises using an effective amount of a dialkylaluminum monohalide compound in component (b) to give improved performance characteristics to the catalyst as compared to that produced when component (b) consists of trialkylaluminum.
Claim 11
Dependent Claim
113 words
In the polymerization of alpha olefins of the formula CH 2 = CHR, where R is an alkyl radical of 1-6 carbon atoms and mixtures thereof with ethylene, using as a catalyst: (a) a component containing titanium on a magnesium halide support which is obtained by copulverizing magnesium halide with one or more electron donors to form a copulverized product followed by reacting the copulverized product with a liquid titanium compound containing halogen, and (b) a trialkylaluminum component wherein the improvement comprises using an effective amount of a dialkylaluminum monohalide compound in component (b) to give improved performance characteristics to the catalyst as compared to that produced when component (b) consists of trialkylaluminum.
Claim 12
Dependent Claim
14 words
A process as claimed in Claim 9 wherein a phenol electron donor is copulverized.
Claim 13
Dependent Claim
15 words
A process as claimed in Claim 9 wherein polysiloxane and phenol electron donors are copulverized.
Claim 14
Dependent Claim
22 words
A process as claimed in Claim 9 wherein a phenol electron donor,polysiloxane, titanium tetrahalide and a carboxylic ester electron donor are copulverized.
Claim 15
Dependent Claim
18 words
A process as claimed in Claim 9 wherein the liquid titanium compound containing halogen is TiCl 4 .
Claim 16
Dependent Claim
18 words
A process as claimed in Claim 12 wherein the liquid titanium compound containing halogen is TiCl 4 .
Claim 17
Dependent Claim
17 words
A process as claimed in Claim 9 wherein the organoaluminum component contains trialkylaluminum and a diethylaluminum monohalide.
Claim 18
Dependent Claim
21 words
A process as claimed in Claim 14 wherein the organoaluminum component contains triethylaluminum and diethylaluminum chloride with a carboxylic ester donor.
Claim 19
Dependent Claim
32 words
A catalyst as claimed in Claim 1 wherein a phenol electron donor, a polysiloxane electron donor, TiCl 4 , and an ester of an aromatic acid are copulverized with the magnesium chloride.
Claim 20
Dependent Claim
57 words
A catalyst as claimed in any of Claims 1-8 and 17 where the total amount of aluminum in component (b) ranges from about 10:1 to about 600:1, as a molar ratio, based on the moles of titanium in component (a) and the mole ratio of trialkylaluminum to dialkylaluminum monohalide organoaluminum ranges from about 5:1 to about 1:5.
Claim 21
Dependent Claim
27 words
A catalyst as claimed in any of Claims 1-8 and 17-18 wherein the mole ratio of trialkylaluminum to dialkylaluminum monohalide ranges from about 5:1 to about 1:5.
Claim 22
Dependent Claim
32 words
A process as claimed in Claim 9 wherein a phenol electron donor, a polysiloxane electron donor, TiCl 4 , and an ester of an aromatic acid are copulverized with the magnesium chloride.
Claim 23
Dependent Claim
59 words
A process as claimed in any of Claims 9 - 16 and 20 and where the total amount of aluminum in component (b) ranges from about 10:1 to about 600:1, as a molar ratio, based on the moles of titanium in component (a) and the mole ratio of trialkylaluminum to dialkylaluminum monohalide ranges from about 5:1 to about 1:5.
Claim 24
Dependent Claim
27 words
A process as claimed in any of Claims 9-16 and 20-21 wherein the mole ratio of trialkylaluminum to dialkylaluminum monohalide ranges from about 5:1 to about 1:5.
References Cited (Backward Citations)
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