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US4255281A
Expired / Lapsed
US
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Alpha-olefin polymerization catalyst and process
Assignee: BP Corp North America Inc
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Filing: 1979-07-03
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Granted: 1981-03-10
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Expires: 1999-07-03
Abstract
Abstract Process for modifying a titanium trichloride-organoaluminum alpha-olefin polymerization catalyst to reduce production of alkane soluble products during polymerization of alpha-olefins in the presence of such catalyst without substantial decreases in catalyst activity, said process comprising combining in an inert diluent and in the substantial absence of catalyst poisons, components comprising an alkylaluminum component, a titanium trichloride, hydrogen sulfide or a bis-(trialkyltin)sulfide, a tertiary amine, and an aromatic dicarbonyl compound selected from the group consisting of dialdehydes and lower alkyl diesters of ortho-, para- and meta-phthalic acids. Polyalpha-olefins containing reduced levels of low molecular weight and amorphous components are produced by contacting the catalysts with at least one polymerizable alpha-olefin under polymerizing conditions.
Inventors
- 👤 John B. Rogan
- 👤 Charles K. Buehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:25
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
154 words
A process for modifying a titanium trichlorideorganoaluminum compound alpha-olefin polymerization catalyst to reduce production of alkane soluble products during polymerization of alpha-olefins in the presence of said catalyst without substantial decreases in catalyst activity, said process comprising combining, in an inert diluent in the substantial absence of catalyst poisons, components comprising: (a) at least one lower alkyl dialkylaluminum chloride; (b) an activated titanium trichloride; (c) an effective amount, ranging up to about 0.2 mole per mole of said titanium trichloride, of bis-(tributyltin)sulfide; (d) an effective amount, ranging up to about 0.4 mole per mole of said titanium trichloride, of 2,4,6-collidine; and (e) an effective amount, ranging up to about 0.3 mole per mole of said titanium trichloride, of at least one dimethyl or diethyl ester of phthalic, isophthalic or terephthalic acid; said effective amounts being effective to reduce levels of alkane soluble components produced during polymerization of alpha-olefins without substantial decreases in catalyst activity.
Claim 2
Dependent Claim
154 words
A process for modifying a titanium trichlorideorganoaluminum compound alpha-olefin polymerization catalyst to reduce production of alkane soluble products during polymerization of alpha-olefins in the presence of said catalyst without substantial decreases in catalyst activity, said process comprising combining, in an inert diluent in the substantial absence of catalyst poisons, components comprising: (a) at least one lower alkyl dialkylaluminum chloride; (b) an activated titanium trichloride; (c) an effective amount, ranging up to about 0.2 mole per mole of said titanium trichloride, of bis-(tributyltin)sulfide; (d) an effective amount, ranging up to about 0.4 mole per mole of said titanium trichloride, of 2,4,6-collidine; and (e) an effective amount, ranging up to about 0.3 mole per mole of said titanium trichloride, of at least one dimethyl or diethyl ester of phthalic, isophthalic or terephthalic acid; said effective amounts being effective to reduce levels of alkane soluble components produced during polymerization of alpha-olefins without substantial decreases in catalyst activity.
Claim 3
Dependent Claim
131 words
An alpha-olefin polymerization catalyst composition capable of reducing the level of alkane soluble components produced during polymerization in the presence of said catalyst without substantial decreases in catalyst activity comprising: (a) at least one lower alkyl dialkylaluminum chloride; (b) an activated titanium trichloride; (c) an effective amount, ranging up to about 0.2 mole per mole of said titanium trichloride, of bis-(tributyltin)sulfide; (d) an effective amount, ranging up to about 0.4 mole per mole of said titanium trichloride, of 2,4,6-collidine; and (e) an effective amount, ranging up to about 0.3 mole per mole of said titanium trichloride, of at least one dimethyl or diethyl ester of phthalic, isophthalic or terephthalic acid; said effective amounts being effective to reduce alkane soluble components produced during polymerization of alpha-olefins without substantial decreases in catalyst activity.
Claim 4
Dependent Claim
131 words
An alpha-olefin polymerization catalyst composition capable of reducing the level of alkane soluble components produced during polymerization in the presence of said catalyst without substantial decreases in catalyst activity comprising: (a) at least one lower alkyl dialkylaluminum chloride; (b) an activated titanium trichloride; (c) an effective amount, ranging up to about 0.2 mole per mole of said titanium trichloride, of bis-(tributyltin)sulfide; (d) an effective amount, ranging up to about 0.4 mole per mole of said titanium trichloride, of 2,4,6-collidine; and (e) an effective amount, ranging up to about 0.3 mole per mole of said titanium trichloride, of at least one dimethyl or diethyl ester of phthalic, isophthalic or terephthalic acid; said effective amounts being effective to reduce alkane soluble components produced during polymerization of alpha-olefins without substantial decreases in catalyst activity.
Claim 5
Dependent Claim
16 words
The catalyst of claim 2 wherein component (e) is dimethyl phthalate, dimethyl isophthalate or dimethyl terephthalate.
Claim 6
Dependent Claim
10 words
The catalyst of claim 2 wherein (e) is diethyl phthalate.
Claim 7
Dependent Claim
10 words
The catalyst of claim 2 wherein (e) is diethyl terephthalate.
Claim 8
Dependent Claim
26 words
The catalyst of claim 5 wherein the effective amount of diethyl terephthalate ranges from about 0.005 to about 0.1 mole per mole of said titanium trichloride.
Claim 9
Dependent Claim
25 words
The catalyst of claim 6 wherein the effective amount of 2,4,6-collidine ranges from about 0.01 to about 0.1 mole per mole of said titanium trichloride.
Claim 10
Dependent Claim
25 words
The catalyst of claim 7 wherein the effective amount of bis-(tributyltin)sulfide ranges from about 0.01 to about 0.1 mole per mole of said titanium trichloride.
References Cited (Backward Citations)
US3129256A
Cited
US3367923A
Cited
GB1128724A
Cited
US3496158A
Cited
US3549717A
Cited
US3670043A
Cited
US3950268A
Cited
US4072809A
Cited
US3984350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |