Patent US4115532A successfully refreshed from Google Patents.
US4115532A
Expired / Lapsed
US
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Preparation of solid titanium trichloride
Assignee: Mitsubishi Chemical Corp
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Filing: 1977-08-01
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Granted: 1978-09-19
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Expires: 1997-08-01
Abstract
Abstract Solid titanium trichloride in the form of fine granules having low aluminum compound content, which is suitable as a catalyst for polymerization of alpha -olefins, especially, propylene is obtained as a precipitate by heating liquefied titanium trichloride in the presence of a liberating agent, and separating the thus formed precipitate. The liquefied titanium trichloride is preferably prepared with an reducing titanium tetrachloride by organic aluminium compound in the presence of ether and hydrocarbon.
Inventors
- 👤 Kazuo Yamaguchi
- 👤 Genjiro Kakogawa
- 👤 Masayoshi Hasuo
- 👤 Nobuaki Goko
- 👤 Yasuo Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:25
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
A process for the production of solid purple titanium trichloride suitable for use as a catalyst for polymerization of an alpha-olefin, which comprises: mixing solid titanium trichloride, an ether and a hydrocarbon solvent selected from the group consisting of aliphatic, alicyclic and aromatic hydrocarbon solvents for reaction to form a homogeneous solution or mixture comprising titanium trichloride, said ether having the generic formula R 1 --O--R 2 , wherein R 1 and R 2 are individually an alkyl or alkenyl group having at least six carbon atoms, and said ether is added in an amount so the molar ratio of ether to titanium trichloride is greater than 1; mixing said homogeneous solution or mixture and a Lewis acid to form a second mixture, said Lewis acid having higher acidity than titanium trichloride; heating said second mixture to a temperature within the range of 20°-150° C to form a purple precipitate of titanium trichloride; and separating said precipitate.
Claim 2
Dependent Claim
157 words
A process for the production of solid purple titanium trichloride suitable for use as a catalyst for polymerization of an alpha-olefin, which comprises: mixing solid titanium trichloride, an ether and a hydrocarbon solvent selected from the group consisting of aliphatic, alicyclic and aromatic hydrocarbon solvents for reaction to form a homogeneous solution or mixture comprising titanium trichloride, said ether having the generic formula R 1 --O--R 2 , wherein R 1 and R 2 are individually an alkyl or alkenyl group having at least six carbon atoms, and said ether is added in an amount so the molar ratio of ether to titanium trichloride is greater than 1; mixing said homogeneous solution or mixture and a Lewis acid to form a second mixture, said Lewis acid having higher acidity than titanium trichloride; heating said second mixture to a temperature within the range of 20°-150° C to form a purple precipitate of titanium trichloride; and separating said precipitate.
Claim 3
Dependent Claim
172 words
A process for the production of solid purple titanium trichloride suitable as a catalyst for polymerization of an alpha-olefin, which comprises: mixing said titanium trichloride, an ether and a hydrocarbon solvent selected from the group consisting of alicyclic and aromatic hydrocarbon solvents for reaction to form a homogeneous solution or mixture comprising titanium trichloride said ether having the generic formula, R 1 --O--R 2 , wherein R 1 and R 2 are individually an alkyl or alkenyl group and wherein at least one of R 1 and R 2 is an alkyl or alkenyl group having five or less carbon atoms, and said ether is added in an amount so that the molar ratio of ether to titanium trichloride is greater than 1; mixing said homogeneous solution or mixture and a Lewis acid to form a second mixture, said Lewis acid having higher acidity than titanium trichloride; heating said second mixture to a temperature within the range of 20°-150° C to form a purple precipitate of titanium trichloride; and separating said precipitate.
Claim 4
Dependent Claim
172 words
A process for the production of solid purple titanium trichloride suitable as a catalyst for polymerization of an alpha-olefin, which comprises: mixing said titanium trichloride, an ether and a hydrocarbon solvent selected from the group consisting of alicyclic and aromatic hydrocarbon solvents for reaction to form a homogeneous solution or mixture comprising titanium trichloride said ether having the generic formula, R 1 --O--R 2 , wherein R 1 and R 2 are individually an alkyl or alkenyl group and wherein at least one of R 1 and R 2 is an alkyl or alkenyl group having five or less carbon atoms, and said ether is added in an amount so that the molar ratio of ether to titanium trichloride is greater than 1; mixing said homogeneous solution or mixture and a Lewis acid to form a second mixture, said Lewis acid having higher acidity than titanium trichloride; heating said second mixture to a temperature within the range of 20°-150° C to form a purple precipitate of titanium trichloride; and separating said precipitate.
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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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |