US4397762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst
Assignee: BP Chemicals Ltd
•
Filing: 1982-01-27
•
Granted: 1983-08-09
•
Expires: 2002-01-27
Abstract
Abstract A supported Ziegler catalyst prepared by the following steps, carried out under anhydrous conditions: (A) reacting a hydroxyl groups-containing support material comprising magnesium silicate or silica and magnesia with one or more organo-metallic compounds having the general formula MR 1 a Q b-a wherein M is a metal which is aluminium, boron, lithium, zinc or magnesium, R 1 is a hydrocarbyl group, Q is halogen or an oxyhydrocarbyl group, b is the valency of M and a is an integer from 1 to b, (B) removing unreacted organometallic compound, if any, from the produced solid material, (C) impregnating the solid material obtained from step B with one or more halogen-containing transition metal compounds wherein the transition metal(s) comprise titanium, vanadium or zirconium.
Inventors
- 👤 Alexander Johnstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:25
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
123 words
A supported Ziegler catalyst prepared by the following steps, carried out under anhydrous conditions: (A) reacting a hydroxyl groups-containing support material comprising magnesium silicate or silica and magnesia with one or more organometallic compounds having the general formula MR 1 a Q b-a wherein M is a metal which is aluminium, boron, lithium, zinc or magnesium, R 1 is a hydrocarbyl group, Q is halogen or an oxyhydrocarbyl group, b is the valency of M and a is an integer from 1 to b, (B) removing unreacted organometallic compound, if any, from the produced solid material, (C) impregnating the solid material obtained from step B with one or more halogen-containing transition metal compounds wherein the transition metal (s) comprise titanium, vanadium or zirconium.
Claim 2
Dependent Claim
123 words
A supported Ziegler catalyst prepared by the following steps, carried out under anhydrous conditions: (A) reacting a hydroxyl groups-containing support material comprising magnesium silicate or silica and magnesia with one or more organometallic compounds having the general formula MR 1 a Q b-a wherein M is a metal which is aluminium, boron, lithium, zinc or magnesium, R 1 is a hydrocarbyl group, Q is halogen or an oxyhydrocarbyl group, b is the valency of M and a is an integer from 1 to b, (B) removing unreacted organometallic compound, if any, from the produced solid material, (C) impregnating the solid material obtained from step B with one or more halogen-containing transition metal compounds wherein the transition metal (s) comprise titanium, vanadium or zirconium.
Claim 3
Dependent Claim
17 words
A catalyst as claimed in claim 1 wherein the hydroxyl groups-containing support material is a coprecipitated silica-magnesia.
Claim 4
Dependent Claim
27 words
A catalyst as claimed in claim 1 or claim 2 wherein the atomic ratio of silicon:magnesium in the support material is in the range 20:1 to 1:20.
Claim 5
Dependent Claim
36 words
A catalyst as claimed in claim 1 or claim 2 wherein the organometallic compound employed in step A is a trihydrocarbyl aluminium, a trihydrocarbyl boron, a dihydrocarbyl zinc, a dihydrocarbyl magnesium or a hydrocarbyl lithium compound.
Claim 6
Dependent Claim
20 words
A catalyst as claimed in claim 1 or claim 2 wherein the organometallic compound employed in step A is triethylaluminium.
Claim 7
Dependent Claim
38 words
A catalyst as claimed in claim 1 or claim 2 wherein the quantity of organometallic compound employed in step A is in the range 0.5 to 1.5 moles per mole of surface hydroxyl groups on the support material.
Claim 8
Dependent Claim
37 words
A catalyst as claimed in claim 1 or claim 2 wherein, in step B, unreacted organometallic compound is removed from the solid material produced in step A by washing the solid material with an anhydrous inert solvent.
Claim 9
Dependent Claim
83 words
A catalyst as claimed in claim 1 or claim 2 wherein the one or more halogen-containing transition metal compounds employed in step C are selected from compounds having the general formulae DX m , DOX.sub.(m-2) and D(OR 2 ) n X m-n wherein D is the titanium, vanadium or zirconium: X is halogen, O is oxygen, R 2 is a hydrocarbyl group containing 1 to 10 carbon atoms: m is the valency of D: and n is an integer from 1 to m-1.
Claim 10
Dependent Claim
21 words
A catalyst as claimed in claim 1 or claim 2 wherein the transition metal compound is titanium tetrachloride or vanadyl chloride.
Claim 11
Dependent Claim
40 words
A catalyst as claimed in claim 1 or claim 2 wherein the quantity of transition metal compound employed in step C is in the range 0.25 to 1.5 moles per mole of organometallic compound residue bound to the support surface.
Claim 12
Dependent Claim
31 words
A catalyst as claimed in claim 1 or claim 2 wherein the one or more halogen-containing transition metal compounds employed in step C comprises a mixture of titanium and vanadium compounds.
Claim 13
Dependent Claim
24 words
A catalyst as claimed in claim 11 wherein the titanium compound is titanium tetrachloride and the vanadium compound is vanadyl chloride (VOCl 3 ).
Claim 14
Dependent Claim
31 words
A catalyst as claimed in claim 1 or claim 2 wherein the catalyst product obtained from step C is washed with dry inert solvent to remove any unadsorbed transition metal compound.
References Cited (Backward Citations)
US3594330A
Cited
GB1256851A
Cited
GB1314005A
Cited
US3855324A
Cited
GB1306044A
Cited
US3745154A
Cited
GB1484254A
Cited
GB1569901A
Cited
GB1593465A
Cited
US4333851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |