Patent US3947433A successfully refreshed from Google Patents.
US3947433A
Expired / Lapsed
US
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Supported chromium oxide catalyst having mixed adjuvant
Assignee: Phillips Petroleum Co
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Filing: 1974-05-13
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Granted: 1976-03-30
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Expires: 1994-05-13
Abstract
Abstract Olefin polymers are made using a supported chromium oxide catalyst which is treated with a mixture of an organoboron compound and a hydrocarbyl aluminum hydrocarbyl oxide. This catalyst is capable of producing high shear response polymer and is of particular utility in the production of such polymer in a particle-form process.
Inventors
- 👤 Donald R. Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:55
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
68 words
A process for producing a catalyst comprising: activating a supported chromium oxide at a temperature within the range of 500°-2,000°F; thereafter treating said thus-activated supported chromium oxide with from 0.5 to 10 weight percent, based on the weight of said supported chromium oxide, of a hydrocarbyl aluminum hydrocarbyloxide and from 0.5 to 10 weight percent, based on the weight of said supported chromium oxide of an organoboron compound.
Claim 2
Dependent Claim
68 words
A process for producing a catalyst comprising: activating a supported chromium oxide at a temperature within the range of 500°-2,000°F; thereafter treating said thus-activated supported chromium oxide with from 0.5 to 10 weight percent, based on the weight of said supported chromium oxide, of a hydrocarbyl aluminum hydrocarbyloxide and from 0.5 to 10 weight percent, based on the weight of said supported chromium oxide of an organoboron compound.
Claim 3
Dependent Claim
23 words
A method according to claim 1 wherein said supported chromium oxide is treated at a temperature within the range of 0° to 130°F.
Claim 4
Dependent Claim
42 words
A method according to claim 1 wherein said hydrocarbyl aluminum hydrocarbyl oxide and said organoboron compound are in a hydrocarbon solvent and are added slowly to a slurry of said catalyst in a hydrocarbon diluent while subjecting said slurry to vigorous mixing.
Claim 5
Dependent Claim
22 words
A method according to claim 1 wherein said hydrocarbyl aluminum hydrocarbyloxide is a dialkylaluminum alkoxide and said organoboron compound is a trialkylboron.
Claim 6
Dependent Claim
21 words
A method according to claim 4 wherein said hydrocarbyl aluminum hydrocarbyl oxide is diethylaluminum ethoxide and said organoboron compound is triethylboron.
Claim 7
Dependent Claim
16 words
A method according to claim 1 wherein said chromium oxide is supported on a precipitated silica.
Claim 8
Dependent Claim
19 words
A method according to claim 6 wherein said chromium oxide is supported on silica coprecipitated with a titanium compound.
Claim 9
Dependent Claim
26 words
A method according to claim 1 wherein a mole ratio of said organoboron to said hydrocarbyl aluminum hydrocarbyloxide is within the range of 0.5:1 to 2:1.
Claim 10
Dependent Claim
90 words
A method according to claim 8 wherein said catalyst is treated at a temperature within the range of 0° to 90°F, said hydrocarbyloxide is in a hydrocarbon solvent and said organoboron compound is in a hydrocarbon solvent and said hydrocarbyloxide and organoboron compound are slowly added to a slurry of said catalyst in a hydrocarbon diluent while subjecting said slurry to vigorous mixing, and wherein said hydrocarbyloxide is diethylaluminum ethoxide and said organoboron compound is triethylboron, and wherein said chromium oxide is supported on silica coprecipitated with a titanium compound.
Claim 11
Dependent Claim
9 words
A catalyst prepared by the method of claim 1.
Claim 12
Dependent Claim
105 words
A process which comprises contacting, in a liquid diluent at a temperature such that at least a substantial part of the polymer produced is insoluble in said diluent, at least one polymerizable olefin under polymerization conditions with a catalyst which catalyst is produced by activating a supported chromium oxide at a temperature within the range of 500°-2,000°F, thereafter treating said thus-activated supported chromium oxide with from 0.05 to 10 weight percent based on the weight of said supported chromium oxide of a hydrocarbyl aluminum hydrocarbyloxide and from 0.5 to 10 weight percent based on the weight of said supported chromium oxide of an organoboron compound.
Claim 13
Dependent Claim
105 words
A process which comprises contacting, in a liquid diluent at a temperature such that at least a substantial part of the polymer produced is insoluble in said diluent, at least one polymerizable olefin under polymerization conditions with a catalyst which catalyst is produced by activating a supported chromium oxide at a temperature within the range of 500°-2,000°F, thereafter treating said thus-activated supported chromium oxide with from 0.05 to 10 weight percent based on the weight of said supported chromium oxide of a hydrocarbyl aluminum hydrocarbyloxide and from 0.5 to 10 weight percent based on the weight of said supported chromium oxide of an organoboron compound.
Claim 14
Dependent Claim
23 words
A method according to claim 11 wherein said olefin is at least one aliphatic mono-1-olefin having 2 to 8 carbon atoms per molecule.
Claim 15
Dependent Claim
25 words
A method according to claim 11 wherein said olefin is ethylene and another 1-olefin, and said polymer consists of 95 to 99 mole percent ethylene.
Claim 16
Dependent Claim
29 words
A method according to claim 11 wherein said contacting is carried out at a temperature within the range of 150°-230°F and substantially all of said polymer is in particle-form.
Claim 17
Dependent Claim
26 words
A method according to claim 11 wherein said diluent is a paraffin or cycloparaffin, or mixture thereof, having from 3 to 12 carbon atoms per molecule.
Claim 18
Dependent Claim
11 words
A method according to claim 11 wherein said diluent is isobutane.
Claim 19
Dependent Claim
20 words
A method according to claim 11 wherein said hydrocarbyl aluminum hydrocarbyloxide is diethylaluminum ethoxide and said organoboron compound is triethylboron.
Claim 20
Dependent Claim
20 words
A method according to claim 11 wherein said chromium oxide is supported on a silica coprecipitated with a titanium compound.
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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) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |