US4192775A
Expired / Lapsed
US
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Olefin polymerization catalyst
Assignee: National Petro-Chemicals Corp
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Filing: 1978-07-17
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Granted: 1980-03-11
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Expires: 1998-07-17
Abstract
Abstract Olefin polymerization catalysts are prepared by depositing an organophosphoryl chromium product and an aluminum acetyl acetonate on an inorganic support material, and heating the support material in a non-reducing atmosphere at a temperature above about 300° C. up to the decomposition temperature of the support material.
Inventors
- 👤 Louis J. Rekers
- 👤 Stanley J. Katzen
- 👤 Jerome H. Krekeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:18
CPC Classifications
C; C08; C08F; C08F10/00; C08F110/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
93 words
A process for preparing an olefin polymerization catalyst system which comprises: (a) depositing an organophosphoryl chromium reaction product of chromium trioxide and a phosphorus compound having the formula ##STR2## wherein R is alkyl, aralkyl, aryl, cycloalkyl, or hydrogen but at least one R is other than hydrogen, upon a solid inorganic support material; (b) depositing aluminum acetylacetonate upon said support material; and, (c) heat-activating said supported organophosphoryl chromium reaction product and aluminum acetylacetonate in a non-reducing atmosphere at a temperature above about 300° C. up to the decomposition temperature of the support material.
Claim 2
Dependent Claim
93 words
A process for preparing an olefin polymerization catalyst system which comprises: (a) depositing an organophosphoryl chromium reaction product of chromium trioxide and a phosphorus compound having the formula ##STR2## wherein R is alkyl, aralkyl, aryl, cycloalkyl, or hydrogen but at least one R is other than hydrogen, upon a solid inorganic support material; (b) depositing aluminum acetylacetonate upon said support material; and, (c) heat-activating said supported organophosphoryl chromium reaction product and aluminum acetylacetonate in a non-reducing atmosphere at a temperature above about 300° C. up to the decomposition temperature of the support material.
Claim 3
Dependent Claim
86 words
The process for preparing a catalyst system according to claim 1 wherein the aluminum acetylacetonate is first deposited upon the support material and the thus treated support is heat-activated in a non-reducing atmosphere at a temperature of at least about 130° C. up to the decomposition temperature of the support and the organophosphoryl chromium reaction product is thereafter deposited upon the support and the thus treated support is again heat-activated but at a temperature above about 300° C. up to the decomposition temperature of the support.
Claim 4
Dependent Claim
20 words
The process for preparing a catalyst system according to claim 1 or 2 wherein said support material contains silica gel.
Claim 5
Dependent Claim
69 words
The process for preparing a catalyst system according to claim 2 wherein said silica gel is a silica xerogel having a surface area in the range of about 200 to about 500 m 2 /g and a pore volume greater than about 2.0 cc/g, a major portion of the pore volume being provided by pores having diameters in the range of from about 300 to about 600 angstrom units.
Claim 6
Dependent Claim
30 words
The process for preparing a catalyst system according to claim 1 or 2 wherein the organophosphoryl chromium reaction product is derived from the reaction of chromium trioxide and triethyl phosphate.
Claim 7
Dependent Claim
26 words
The process for preparing a catalyst system according to claim 1 or 2 wherein a metallic and/or non-metallic reducing agent is added to the heat-activated catalyst.
Claim 8
Dependent Claim
43 words
The process for preparing a catalyst system according to claim 6 wherein the reducing agent is a metallic reducing agent selected from the group consisting of triethyl aluminum, triisobutyl aluminum, alkyl aluminum halide, alkyl aluminum alkoxide, dialkyl zinc, dialkyl magnesium and metal borohydride.
Claim 9
Dependent Claim
33 words
The process for preparing a catalyst system according to claim 6 in which the reducing agent is a non-metallic reducing agent selected from the group consisting of alkyl borane and hydrides of boron.
Claim 10
Dependent Claim
18 words
The process of preparing a catalyst system according to claim 8 wherein the alkyl borane is triethyl borane.
Claim 11
Dependent Claim
73 words
The process of preparing a catalyst system according to claim 1 or 2 wherein the organophosphoryl chromium reaction product is present in an amount sufficient to provide about 0.25 to about 2.5% by weight of Cr based upon the weight of the support material and the aluminum acetylacetonate is present in an amount sufficient to provide about 0.10 to about 10% by weight of Al based upon the weight of the support material.
Claim 12
Dependent Claim
14 words
The olefin polymerization catalyst system produced by the process of claim 1 or 2.
Claim 13
Dependent Claim
17 words
The olefin polymerization catalyst of claim 11 to which a metallic and/or non-metallic reducing agent is added.
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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) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |