Patent US3625864A successfully refreshed from Google Patents.
US3625864A
Expired / Lapsed
US
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Polymerization catalyst system additives
Assignee: Phillips Petroleum Co
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Filing: 1969-04-23
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Granted: 1971-12-07
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Expires: 1989-04-23
Abstract
Abstract A method of preparing a polymerization catalyst which involves impregnating a catalyst support with chromium oxide and a titanium complex formed by reacting a titanium alkoxide a compound selected from the group consisting of R''xSn(OH)m and R''''pB(OH)q in which R'' and R'''' are selected from the group consisting of alkyl, aryl, and cycloalkyl radicals and combinations thereof.
Inventors
- 👤 Bertalan Horvath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:24
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
18 words
The method of claim 1 wherein the titanium complex is formed in the presence of an organic medium.
Claim 2
Dependent Claim
29 words
The method of claim 1 wherein the titanium complex is contained in the polymerization catalyst from about 1 to about 10 weight percent of the weight of the catalyst.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein the titanium complex contains the titanium compound and the boron compound is molal ratios of about 0.1/1 to about 10/1.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein the titanium complex contains the titanium compound and the tin compound in molal ratios of about 0.1/1 to about 10/1.
Claim 5
Dependent Claim
32 words
The method of claim 1 wherein the catalyst support is impregnated with the titanium reaction product by introducing the support into the hydrocarbon medium in which the titanium reaction product is formed.
Claim 6
Dependent Claim
33 words
The method of claim 6 wherein the impregnation is carried out by refluxing the titanium reaction product and the catalyst support in the hydrocarbon medium in which the titanium reaction product is formed.
Claim 7
Dependent Claim
37 words
The method of claim 7 in which chromium oxide in an organic solvent is introduced in contact with the catalyst support impregnated with the titanium reaction product and the mixture evaporated to dryness and the catalyst recovered.
Claim 8
Dependent Claim
53 words
The method of claim 1 wherein titanium isopropoxide is contacted with triphenyl tin hydroxide in equi-mol proportions in anhydrous toluene, the catalyst support is introduced into the toluene containing the titanium-tin complex, said support being thereby impregnated with said complex, the impregnated support being separated from the toluene and impregnated with chromium oxide.
Claim 9
Dependent Claim
53 words
The method of claim 1 wherein titanium isopropoxide is contacted with diphenyl boron hydroxide in equi-mol proportions in anhydrous toluene, the catalyst support is introduced into the toluene containing the boron-tin complex, said support being thereby impregnated with said complex, the impregnated support being separated from the toluene and impregnated with chromium oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |