US4506027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a supported Ziegler-catalyst for the polymerization of alpha-olefins
Assignee: Anic SpA
•
Filing: 1983-11-10
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Granted: 1985-03-19
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Expires: 2003-11-10
Abstract
Abstract Method of preparing a supported Ziegler-catalyst active in the polymerization of alpha-olefins to polymers particularly suited to working by blow-moulding, by reacting: (A) an organometallic compound of aluminium, and (B) the product of the reaction of titanium and vanadium halides with a solid support obtained by the spray drying of magnesium chloride in a mixed solution of ethanol and methanol, the support containing both ethanolic and methanolic alcoholic hydroxyl groups.
Inventors
- 👤 Renzo Invernizzi
- 👤 Ferdinando Ligorati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:53
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/904
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
Method of preparing a supported Ziegler-catalyst, active in the polymerisation of alpha-olefins, characterised by reacting in an inert solvent an organometallic compound of aluminium and an activated solid support obtained by spray-drying of a solution of magnesium chloride in a mixture of ethanol and methanol in a weight ratio of ethanol to methanol from 0.5:1 to 2.5:1, to a solid support containing ethanolic and methanolic alcoholic hydroxyl groups in an amount of from 2% to 30% by weight, expressed as the sum of ethanol and methanol content, and then reacting the said solid support with a titanium halide and a vanadium halide in the presence of an inert diluent, at a temperature of from 20° C. to 120° C., for a period of time of from 2 to 120 minutes, so to fix to the said solid support an amount of from 0.7% to 12% by weight (expressed as the sum of the metals) of titanium and vanadium, the weight ratio of titanium to vanadium being from 0.5:1 to 2.5:1.
Claim 2
Dependent Claim
170 words
Method of preparing a supported Ziegler-catalyst, active in the polymerisation of alpha-olefins, characterised by reacting in an inert solvent an organometallic compound of aluminium and an activated solid support obtained by spray-drying of a solution of magnesium chloride in a mixture of ethanol and methanol in a weight ratio of ethanol to methanol from 0.5:1 to 2.5:1, to a solid support containing ethanolic and methanolic alcoholic hydroxyl groups in an amount of from 2% to 30% by weight, expressed as the sum of ethanol and methanol content, and then reacting the said solid support with a titanium halide and a vanadium halide in the presence of an inert diluent, at a temperature of from 20° C. to 120° C., for a period of time of from 2 to 120 minutes, so to fix to the said solid support an amount of from 0.7% to 12% by weight (expressed as the sum of the metals) of titanium and vanadium, the weight ratio of titanium to vanadium being from 0.5:1 to 2.5:1.
Claim 3
Dependent Claim
21 words
Method according to claim 1 characterised that the organometallic compound of aluminium is an alkyl aluminium or an alkyl aluminium halide.
Claim 4
Dependent Claim
17 words
Method according to claim 1 characterised in that the titanium halide is titanium tetrachloride or titanium tetrabromide.
Claim 5
Dependent Claim
17 words
Method according to claim 1 characterised in that the vanadium halide is vanadium tetrachloride or vanadium oxychloride.
Claim 6
Dependent Claim
22 words
Method according to claim 1 characterised in that the titanium halide and vanadium halide are separately reacted with the said solid support.
Claim 7
Dependent Claim
23 words
Method according to claim 5 characterised in that the said solid support is reacted before with titanium halide and then with vanadium halide.
Claim 8
Dependent Claim
34 words
Method according to claim 6 characterised in that the vanadium halide is reacted at a temperature of from 60° C. to 120° C. for a period of time of from 20 to 120 minutes.
Claim 9
Dependent Claim
43 words
Method according to claim 1 characterised in that the organometallic aluminium compound and the said activated solid support are reacted in quantities such as to ensure in the mixture an aluminium to (titanium+vanadium) atomic ratio in the range of from 10.1 to 1,000:1.
References Cited (Backward Citations)
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US4208304A
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US4333851A
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US4376062A
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US4316818A
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US4410451A
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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) | 1988-03-18 | 1988-09-17 | 1989-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-18 | 1992-09-17 | 1993-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-18 | 1996-09-17 | 1997-03-19 | $7700.00 | Window Closed / Lapsed |