Patent US4145312A successfully refreshed from Google Patents.
US4145312A
Expired / Lapsed
US
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Polymerization catalyst
Assignee: BP Chemicals Ltd
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Filing: 1977-05-18
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Granted: 1979-03-20
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Expires: 1997-05-18
Abstract
Abstract A supported Ziegler catalyst prepared by a process comprising treating a magnesium containing support material with a titanium compound in the presence of a tin compound having the formula Sn(OR') m X 4-m wherein R' is a hydrocarbyl radical, m is 0-4 and X is halogen. The catalyst is used with a conventional co-catalyst e.g. a trialkyl aluminium compound.
Inventors
- 👤 Ian A. Matheson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:21
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
158 words
A process for preparing a supported Ziegler catalyst comprising bringing together at a temperature from about 0° to 240° C. a substantially free from moisture magnesium-containing support material selected from the group consisting of magnesium oxide, magnesium hydroxide, and magnesium hydroxy chloride having a particle size in the range 1 to 500 microns and containing at least some hydroxyl groups with a halogen-containing titanium compound having the formula Ti(OR) n Cl 4-n wherein n has any value from 0 to 3 inclusive and R is a hydrocarbon group, in the presence of an unreacted tin compound having the formula Sn(OR') m X 4-m wherein R' is a hydrocarbyl radical, m is 0-4 and X is halogen, the concentration of supported titanium being in the range of about 0.1 to 30% based on the total weight of catalyst and the quantity of tin compound being in the range of from 0.2 to 20,000 millimoles per kilogram of support material.
Claim 2
Dependent Claim
158 words
A process for preparing a supported Ziegler catalyst comprising bringing together at a temperature from about 0° to 240° C. a substantially free from moisture magnesium-containing support material selected from the group consisting of magnesium oxide, magnesium hydroxide, and magnesium hydroxy chloride having a particle size in the range 1 to 500 microns and containing at least some hydroxyl groups with a halogen-containing titanium compound having the formula Ti(OR) n Cl 4-n wherein n has any value from 0 to 3 inclusive and R is a hydrocarbon group, in the presence of an unreacted tin compound having the formula Sn(OR') m X 4-m wherein R' is a hydrocarbyl radical, m is 0-4 and X is halogen, the concentration of supported titanium being in the range of about 0.1 to 30% based on the total weight of catalyst and the quantity of tin compound being in the range of from 0.2 to 20,000 millimoles per kilogram of support material.
Claim 3
Dependent Claim
21 words
A process as claimed in claim 1 wherein the magnesium-containing support material is magnesium oxide obtained by thermally decomposing magnesium hydroxide.
Claim 4
Dependent Claim
27 words
A process as claimed in claim 1 wherein the support material is magnesium oxide having a hydroxyl group content less than 0.2 OH groups per magnesium atom.
Claim 5
Dependent Claim
26 words
A process as claimed in claim 1 wherein the titanium compound is titanium tetrachloride, Ti(OC 2 H 5 ) 2 Cl 2 or Ti(OiPr)Cl 3 .
Claim 6
Dependent Claim
36 words
A process as claimed in claim 1 wherein the quantity of titanium compound employed is sufficient to give a concentration of supported titanium in the range 0.5 to 15% based on the total weight of catalyst.
Claim 7
Dependent Claim
19 words
A process as claimed in claim 1 wherein the tin compound is trichloro stannic isopropylate or dichloro stannic di-isopropylate.
Claim 8
Dependent Claim
14 words
A process as claimed in claim 1 wherein the tin compound is stannic chloride.
Claim 9
Dependent Claim
31 words
A process as claimed in claim 6 wherein the quantity of tin compound employed is in the range 1 millimole to 1 × 10 4 millimoles per kilogram of support material.
Claim 10
Dependent Claim
27 words
A process as claimed in claim 7 wherein the quantity of stannic chloride employed is in the range 0.1 to 50 microliters per 10g of support material.
Claim 11
Dependent Claim
22 words
A process as claimed in claim 1 wherein the bringing together is carried out at a temperature in the range 60°-140° C.
Claim 12
Dependent Claim
23 words
A process as claimed in claim 7 wherein an alcohol or amine is present as an electron donor compound during the bringing together.
Claim 13
Dependent Claim
51 words
A process as claimed in claim 1 wherein the tin compound is stannic chloride and the titanium compound is titanium tetrachloride and the bringing together is carried out by adding the stannic chloride to a mixture of the titanium tetrachloride and isopropanol and refluxing the total mixture with the support material.
Claim 14
Dependent Claim
28 words
A process as defined in claim 1 wherein said tin compound is mixed with said titanium compound before bringing the titanium compound together with the magnesium-containing support material.
References Cited (Backward Citations)
US3116274A
Cited
US3163611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |