Patent US2506908A successfully refreshed from Google Patents.
Patent US4007133A successfully refreshed from Google Patents.
US4007133A
Expired / Lapsed
US
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Process for the manufacture of a catalyst
Assignee: Hoechst AG
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Filing: 1975-02-27
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Granted: 1977-02-08
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Expires: 1995-02-27
Abstract
Abstract A catalyst of high activity and stereospecificity in α-olefin polymerization is obtained by subjecting titanium trichloride, obtained by reduction of titanium tetrachloride with aluminum alkyl halides, to two thermal treatments, the second thermal treatment being carried out in the presence of a dialkyl ether.
Inventors
- 👤 Kurt Rust
- 👤 Erwin Schrott
- 👤 Helmut Strametz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:17
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/903; Y10S526/907
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
171 words
In the process for the manufacture of a catalyst by reacting titanium tetrachloride in an inert hydrocarbon solvent with an aluminum-organic compound selected from the group consisting of aluminum dialkyl chlorides and aluminum alkyl sesquichlorides wherein the alkyl group contains 1 to 6 carbon atoms, thermally treating the TiCl 3 -containing reaction product, separating and washing the reaction product (component A) and mixing it with an aluminum dialkyl halide (component B) the improvement which comprises preparing component A by adding said aluminum-organic compound to the TiCl 4 at a temperature of from 31 20° to +20° C in a molar proportion of aluminum dialkyl chloride to TiCl 4 of from 0.8:1 to 1.5:1, subjecting the TiCl 3 -containing solid reaction product to a thermal treatment at a temperature of from 40° to 150° C, effecting a further thermal treatment at a temperature of 70° to 150° C in the presence of a dialkyl ether at a TiCl 3 -ether molar ratio of 1:0.6 to 1:1.2 and separating the solid reaction product.
Claim 2
Dependent Claim
171 words
In the process for the manufacture of a catalyst by reacting titanium tetrachloride in an inert hydrocarbon solvent with an aluminum-organic compound selected from the group consisting of aluminum dialkyl chlorides and aluminum alkyl sesquichlorides wherein the alkyl group contains 1 to 6 carbon atoms, thermally treating the TiCl 3 -containing reaction product, separating and washing the reaction product (component A) and mixing it with an aluminum dialkyl halide (component B) the improvement which comprises preparing component A by adding said aluminum-organic compound to the TiCl 4 at a temperature of from 31 20° to +20° C in a molar proportion of aluminum dialkyl chloride to TiCl 4 of from 0.8:1 to 1.5:1, subjecting the TiCl 3 -containing solid reaction product to a thermal treatment at a temperature of from 40° to 150° C, effecting a further thermal treatment at a temperature of 70° to 150° C in the presence of a dialkyl ether at a TiCl 3 -ether molar ratio of 1:0.6 to 1:1.2 and separating the solid reaction product.
Claim 3
Dependent Claim
19 words
A process as claimed in claim 1, wherein aluminum ethyl sesquichloride is used for the reaction with titanium tetrachloride.
Claim 4
Dependent Claim
44 words
A process as claimed in claim 1, wherein at the beginning of the reaction of titanium tetrachloride with the aluminum-organic compound the molar proportion of aluminum dialkyl chloride to titanium tetrachloride is in the range of from 0.9 : 1 to 1.1 : 1.
Claim 5
Dependent Claim
35 words
A process as claimed in claim 1, wherein the first thermal treatment of the TiCl 3 -containing reaction product is carried out at a temperature of from 40° to 150° C in several temperature stages.
Claim 6
Dependent Claim
24 words
A process as claimed in claim 1, wherein the thermal treatment in the presence of a dialkyl ether lasts for 5 to 300 minutes.
Claim 7
Dependent Claim
31 words
A process as claimed in claim 1, wherein the suspension subjected to the thermal treatment in the presence of the dialkyl ether contains 0.5 to 2.5 moles TiCl 3 per liter.
Claim 8
Dependent Claim
16 words
A process as claimed in claim 1, wherein di-n-butyl ether is used for the thermal treatment.
Claim 9
Dependent Claim
33 words
A process as claimed in claim 1, wherein the molar proportion of aluminum dialkyl monochloride (component B) to component A is in the range of from 1 : 1 to 100 : 1.
Claim 10
Dependent Claim
69 words
A process as claimed in claim 1, wherein there is incorporated in the catalyst a component C which is a cyclopolyene selected from the group consisting of cycloheptatriene-1,3,5, norcaradiene and the alkyl- and alkoxy-substituted derivatives thereof having 1 to 4 carbon atoms in the alkyl radical and the molar proportion of component C to component A is in the range of from 0.1 : 1 to 1 : 1.
Claim 11
Dependent Claim
9 words
A catalyst prepared by the process of claim 1.
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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |