Patent US4170568A successfully refreshed from Google Patents.
US4170568A
Expired / Lapsed
US
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Polymerization catalyst
Assignee: BP Chemicals Ltd
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Filing: 1978-03-06
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Granted: 1979-10-09
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Expires: 1998-03-06
Abstract
Abstract A process for making a supported Ziegler catalyst by (i) forming a support material by heating a magnesium carboxylate to convert it at least partially to magnesium oxide and (ii) impregnating said support material with product of reacting a halo-transition metal compound with an alcohol. The transition metal is Ti, V or Zr and the halo-compound is a halide, haloalkoxide, or oxyhalide. The catalyst can be activated using conventional Ziegler catalyst activations, e.g. triethyl aluminium.
Inventors
- 👤 Kenneth C. Kirkwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:24
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/14; B01J31/143; B01J21/00; B01J21/10; B01J31/0201; B01J31/0211; B01J31/0212; B01J31/0231; B01J31/04; B01J31/16; B01J31/1616; B01J31/26; B01J31/36; B01J31/38; B01J37/00; B01J37/08; B01J37/082; B01J37/086; C; C08; C08F; C08F10/00; C08F110/00; C08F110/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
a process for the production of a supported Ziegler catalyst A (I) forming a support material by heating the magnesium salt of an organic carboxylic acid under conditions so that at least part thereof is converted to magnesium oxide, and (II) impregnating the said support material with the crude product of reacting together (a) a transition metal compound which is a halide, haloalkoxide or oxyhalide of titanium, vanadium or zirconium and (b) an aliphatic alcohol.
Claim 2
Dependent Claim
75 words
a process for the production of a supported Ziegler catalyst A (I) forming a support material by heating the magnesium salt of an organic carboxylic acid under conditions so that at least part thereof is converted to magnesium oxide, and (II) impregnating the said support material with the crude product of reacting together (a) a transition metal compound which is a halide, haloalkoxide or oxyhalide of titanium, vanadium or zirconium and (b) an aliphatic alcohol.
Claim 3
Dependent Claim
25 words
A process as claimed in claim 1 wherein the magnesium salt is magnesium formate, magnesium acetate, magnesium oxalate, magnesium malonate, magnesium maleate or magnesium benzoate.
Claim 4
Dependent Claim
20 words
A process as claimed in claim 1 wherein at least 60% of the magnesium salt is converted to magnesium oxide.
Claim 5
Dependent Claim
27 words
A process as claimed in claim 1 wherein the heating is carried out at a temperature between 5° and 100° above the decomposition temperature of the salt.
Claim 6
Dependent Claim
62 words
A process as claimed in claim 1 wherein the transition metal compound is a compound having the general formula M(OR) n Cl m-n wherein M is Ti, V or Zr; zero≦n<m; m is the valency of M; m=4 when M is Ti or Zr, or m=3, 4 or 5 when M is V; R is an alkyl group containing 1-12 carbon atoms.
Claim 7
Dependent Claim
11 words
A process as claimed in claim 5 wherein M is Ti.
Claim 8
Dependent Claim
15 words
A process as claimed in claim 1 wherein the transition metal compound is titanium tetrachloride.
Claim 9
Dependent Claim
42 words
A process as claimed in claim 1 wherein the quantity of transition metal compound employed is sufficient to give a concentration of transition metal in the catalyst in the range 1.5 to 9 wt % based on the total weight of catalyst.
Claim 10
Dependent Claim
14 words
A process as claimed in claim 1 wherein the alcohol contains 1-6 carbon atoms.
Claim 11
Dependent Claim
20 words
A process as claimed in claim 1 wherein the transition metal compound is titanium tetrachloride and the alcohol is isopropanol.
Claim 12
Dependent Claim
22 words
A process as claimed in claim 10 wherein the titanium tetrachloride and the isopropanol are reacted in the presence of a diluent.
Claim 13
Dependent Claim
26 words
A supported Ziegler catalyst prepared according to claim 1 which has been activated by the addition thereto of an activating quantity of a trialkyl aluminium compound.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |