USRE30970E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst
Assignee: BP Chemicals Ltd
•
Filing: 1980-12-03
•
Granted: 1982-06-15
•
Expires: 2000-12-03
Abstract
Abstract Process for preparing a supported Ziegler catalyst by impregnating a magnesium-containing support material with the product of reacting a halogen-containing transition metal compound (other than a fluorine-containing compound) with an aliphatic alcohol under substantially anhydrous conditions. Preferred support materials are magnesium oxide or the product of heating magnesium chloride with silica.
Inventors
- 👤 David L. Hyde
- 👤 Kenneth C. Kirkwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:40
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A process for the production of a supported Ziegler catalyst component comprising reacting a transition metal compound which is a chloride, chloro-alkoxide or oxychloride of titanium, vanadium or zirconium, with an aliphatic alcohol containing 1-6 carbon atoms and impregnating a magnesium oxide support material .Iadd.having an hydroxyl content of less than 0.2 OH groups per magnesium atom .Iaddend.with the product of said reaction, said reaction and impregnation being carried out under substantially anhydrous conditions.
Claim 2
Dependent Claim
74 words
A process for the production of a supported Ziegler catalyst component comprising reacting a transition metal compound which is a chloride, chloro-alkoxide or oxychloride of titanium, vanadium or zirconium, with an aliphatic alcohol containing 1-6 carbon atoms and impregnating a magnesium oxide support material .Iadd.having an hydroxyl content of less than 0.2 OH groups per magnesium atom .Iaddend.with the product of said reaction, said reaction and impregnation being carried out under substantially anhydrous conditions.
Claim 3
Dependent Claim
20 words
Process according to claim 1 wherein said support material is magnesium oxide prepared by the thermal decomposition of magnesium hydroxide.
Claim 4
Dependent Claim
44 words
Process according to claim 1 wherein said transition metal compound has the general formula .[.Ti(OR) n CL 4-n .]. .Iadd.Ti(OR) n Cl 4-n .Iaddend. wherein n has any value from 0 to 3 inclusive and R is an alkyl group containing 1-6 carbon atoms.
Claim 5
Dependent Claim
15 words
Process as claimed in claim 1 wherein said transition metal compound is TiCl 4 .
Claim 6
Dependent Claim
16 words
Process as claimed in claim 1 wherein said aliphatic alcohol is methanol, ethanol, isopropanol or isobutanol.
Claim 7
Dependent Claim
65 words
Process as claimed in claim 1 wherein the quantity of halogen-containing transition metal compound employed is at least sufficient to give a transition metal concentration in the final catalyst in the range 0.5 to 15% based on the total weight of catalyst, and the quantity of aliphatic alcohol employed is in the range 0.1 to 4.0 moles per mole of halogen-containing transition metal compound employed.
Claim 8
Dependent Claim
44 words
A process for the production of a supported Ziegler catalyst comprising impregnating a magnesium oxide support material .Iadd.having an hydroxyl content of less than 0.2 OH groups per magnesium atom .Iaddend.with the product of reacting together isopropanol and titanium tetrachloride under substantially anhydrous conditions.
Claim 9
Dependent Claim
44 words
A process for the production of a supported Ziegler catalyst comprising impregnating a magnesium oxide support material .Iadd.having an hydroxyl content of less than 0.2 OH groups per magnesium atom .Iaddend.with the product of reacting together isopropanol and titanium tetrachloride under substantially anhydrous conditions.
References Cited (Backward Citations)
GB969764A
Cited
GB1276345A
Cited
GB1287396A
Cited
US3781257A
Cited
US3786032A
Cited
US3989880A
Cited
US3989879A
Cited
US4087380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |