Patent US4016344A successfully refreshed from Google Patents.
US4016344A
Expired / Lapsed
US
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Olefin polymerization catalyst
Assignee: Gulf Research and Development Co
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Filing: 1976-02-04
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Granted: 1977-04-05
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Expires: 1996-02-04
Abstract
Abstract In mono 1-olefin polymerization processes employing a magnesium compound supported Ziegler-type catalyst; the improvement which comprises treating the magnesium compound support with an organic peroxide prior to impregnating the support with a transition metal halide catalyst component.
Inventors
- 👤 Rajindar K. Kochhar
- 👤 Robert J. Rowatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:51
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A process for preparing a catalyst component which comprises contacting an inorganic magnesium compound selected from the group consisting of magnesium oxide and basic magnesium carbonate with an organic peroxide in the presence of an inert solvent and at an elevated temperature of at least 20° C., recovering the peroxide-treated inorganic magnesium compound from the inert solvent, drying the peroxide-treated inorganic magnesium compound at an elevated temperature of at least 50° C., and thereafter contacting the peroxide-treated inorganic magnesium compound with a transition metal halide selected from the group consisting of those vanadium and titanium halides normally liquid at room temperature.
Claim 2
Dependent Claim
101 words
A process for preparing a catalyst component which comprises contacting an inorganic magnesium compound selected from the group consisting of magnesium oxide and basic magnesium carbonate with an organic peroxide in the presence of an inert solvent and at an elevated temperature of at least 20° C., recovering the peroxide-treated inorganic magnesium compound from the inert solvent, drying the peroxide-treated inorganic magnesium compound at an elevated temperature of at least 50° C., and thereafter contacting the peroxide-treated inorganic magnesium compound with a transition metal halide selected from the group consisting of those vanadium and titanium halides normally liquid at room temperature.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein the initial contact between the organic peroxide and the inorganic magnesium compound is maintained for a period of time ranging from 10 minutes to about 1 hour.
Claim 4
Dependent Claim
30 words
The process of claim 1 wherein the concentration of the organic peroxide is maintained in the range of 0.1 to 20 grams per 100 grams of the inorganic magnesium compound.
Claim 5
Dependent Claim
24 words
The process of claim 3 wherein said organic peroxide is selected from the group consisting of dicumyl peroxide, α,α'-bis(t-butyl-peroxy) isopropyl benzene and ethyl-3,3-bis(t-butyl-peroxy) butyrate.
Claim 6
Dependent Claim
14 words
The process of claim 1 in which the transistion metal halide is titanium tetrachloride.
Claim 7
Dependent Claim
29 words
The process of claim 5 in which the titanium tetrachloride is employed in the amount of 0.05 to 10 parts per weight per part of the inorganic magnesium compound.
Claim 8
Dependent Claim
43 words
A process for preparing a polymerization catalyst which comprises contacting a catalyst component prepared by the process of claim 1 with an organometallic compound selected from the group consisting of triethyl aluminum and triisobutyl aluminum in the presence of an inert hydrocarbon solvent.
Claim 9
Dependent Claim
43 words
A process for preparing a polymerization catalyst which comprises contacting a catalyst component prepared by the process of claim 4 with an organometallic compound selected from the group consisting of triethyl aluminum and triisobutyl aluminum in the presence of an inert hydrocarbon solvent.
Claim 10
Dependent Claim
43 words
A process for preparing a polymerization catalyst which comprises contacting a catalyst component prepared by the method of claim 6 with an organometallic compound selected from the group consisting of triethyl aluminum and triisobutyl aluminum in the presence of an inert hydrocarbon solvent.
Claim 11
Dependent Claim
22 words
A process for polymerizing ethylene which consists essentially of contacting ethylene with a polymerization catalyst prepared by the method of claim 7.
References Cited (Backward Citations)
US3024227A
Cited
US3157627A
Cited
US3196116A
Cited
US3454547A
Cited
GB1140649A
Cited
US3642746A
Cited
US3647772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |