US4396533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst
Assignee: BP Chemicals Ltd
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Filing: 1982-01-27
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Granted: 1983-08-02
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Expires: 2002-01-27
Abstract
Abstract A supported Ziegler catalyst prepared by the following steps: (A) heating together at a temperature in the range of 250° to 1100° C. a refractory oxide support material having surface hydroxyl groups and one or more halogen-free metal derivatives which are hydrides and/or organic derivatives of the metal. (B) reacting the product from (A) with one or more organometallic compounds having the feneral formula MR 1 a Q b-a wherein M is a metal atom, R 1 is a hydrocarbon group, Q is a halogen or an oxyhydrocarbyl group, b is the valency of M and a is an integer from 1 to b and wherein the metal atom M is aluminium, boron, lithium, zinc or magnesium, (C) impregnating the solid product from step (B) with one or more halogen-containing transition metal compounds wherein the transition metal or metals comprise titanium and/or vanadium and/or zirconium.
Inventors
- 👤 Alexander Johnstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:32
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
163 words
A supported Ziegler catalyst prepared by the following steps: (A) heating together at a temperature in the range 250° to 1100° C. a refractory oxide support material having surface hydroxyl groups and one or more halogen-free metal derivatives which are hydrides and/or organic derivatives of the metal, said metal being selected from the group consisting of titanium, aluminum, nickel, vanadium, zirconium, boron, magnesium, silicon, zinc, and tin (B) reacting the product from (A) with one or more organometallic compounds having the general formula MR a 1 Q b-a wherein M is a metal atom, R 1 is a hydrogen group, Q is halogen or an oxyhydrocarbyl group, b is the valency of M and a is an integer from 1 to b and wherein the metal atom H is aluminium, boron, lithium, zinc or magnesium, (C) impregnating the solid product from step (B) with one or more halogen-containing transition metal compounds wherein the transition metal or metals comprise titanium and/or vanadium and/or zirconium.
Claim 2
Dependent Claim
163 words
A supported Ziegler catalyst prepared by the following steps: (A) heating together at a temperature in the range 250° to 1100° C. a refractory oxide support material having surface hydroxyl groups and one or more halogen-free metal derivatives which are hydrides and/or organic derivatives of the metal, said metal being selected from the group consisting of titanium, aluminum, nickel, vanadium, zirconium, boron, magnesium, silicon, zinc, and tin (B) reacting the product from (A) with one or more organometallic compounds having the general formula MR a 1 Q b-a wherein M is a metal atom, R 1 is a hydrogen group, Q is halogen or an oxyhydrocarbyl group, b is the valency of M and a is an integer from 1 to b and wherein the metal atom H is aluminium, boron, lithium, zinc or magnesium, (C) impregnating the solid product from step (B) with one or more halogen-containing transition metal compounds wherein the transition metal or metals comprise titanium and/or vanadium and/or zirconium.
Claim 3
Dependent Claim
22 words
A catalyst as claimed in claim 1 wherein the refractory oxide support material is silica, silica-alumina, alumina, zirconia, thoria, titania or magnesia.
Claim 4
Dependent Claim
31 words
A catalyst as claimed in claim 1 or 2 wherein the refractory oxide support material is silica or silica-alumina having a mean particle diameter in the range 30 to 300 μm.
Claim 5
Dependent Claim
36 words
A catalyst as claimed in claim 1 or claim 2 wherein the metal in the halogen-free metal derivative employed in step A is selected from titanium, aluminium, nickel, vanadium, zirconium, boron, magnesium, silicon, zinc and tin.
Claim 6
Dependent Claim
25 words
A catalyst as claimed in claim 1 or claim 2 wherein the halogen-free metal derivative employed in step A contains one or more hydride atoms.
Claim 7
Dependent Claim
32 words
A catalyst as claimed in claim 1 or claim 2 wherein the halogen-free metal derivative contains one or more organic groups selected from alkyl, aryl, alkenyl, alkoxy, aryloxy, carboxylate and alkylamino groups.
Claim 8
Dependent Claim
38 words
A catalyst as claimed in claim 1 or claim 2 where the quantity of halogen-free metal compound employed in step A is 0.1 to 0.5 moles per mole of hydroxyl groups present in the refractory oxide support material.
Claim 9
Dependent Claim
29 words
A catalyst as claimed in claim 1 or claim 2 wherein the heating in step A is carried out at a temperature in the rangge 400° to 900° C.
Claim 10
Dependent Claim
22 words
A catalyst as claimed in claim 1 or claim 2 wherein the organometallic compound employed in step B is an aluminium trialkyl.
Claim 11
Dependent Claim
42 words
A catalyst as claimed in claim 1 or claim 2 wherein the quantity of organometallic compound employed in step B is in the range 0.5 to 1.5 moles per mole of surface hydroxyl groups present on the original refractory oxide support material.
Claim 12
Dependent Claim
28 words
A catalyst as claimed in claim 1 or claim 2 wherein the transition metal compound employed in step C is titanium tetrachloride, vanadyl chloride or a mixture thereof.
Claim 13
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 0.1 to 1.5 moles per mole of hydroxyl groups present in the original support material.
Claim 14
Dependent Claim
23 words
A catalyst as claimed in claim 1 or claim 2 wherein the transition metal compound comprises a mixture of titanium and vanadium compounds.
Claim 15
Dependent Claim
24 words
A supported Ziegler catalyst prepared as defined in claim 1 or claim 2 to which there is added during use a Ziegler catalyst activator.
Claim 16
Dependent Claim
24 words
A supported Ziegler catalyst as defined in claim 14 wherein said Ziegler catalyst activator is a trialkyl aluminum compound or an alkyl aluminum halide.
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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) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |