Patent US3926929A successfully refreshed from Google Patents.
US3926929A
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Process for polymerization of olefin
Assignee: Mitsubishi Chemical Corp
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Filing: 1974-03-07
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Granted: 1975-12-16
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Expires: 1994-03-07
Abstract
Abstract Olefin polymerization is conducted using a catalyst system comprising an organo-aluminum compound and a solid catalyst product prepared by reacting an organo-tin compound of the formula SnR3Y wherein R is a hydrocarbon group having 1-14 carbon atoms and Y is a halogen or alkoxy, and a halide of a Group III element of the Periodic Table, with quadrivalent titanium compound, quadrivalent vanadium compound, pentavalent vanadium compound, or a mixture or reaction product thereof. In one embodiment, the reaction may be conducted in the presence of a titanium compound having a valency of lower than quadrivalent or a vanadium compound having a valency of lower than quadrivalent or pentavalent.
Inventors
- 👤 Nobuo Enokido
- 👤 Atsushi Murakami
- 👤 Kazuo Yamaguchi
- 👤 Natsuki Kanoh
- 👤 Toru Tanaka
- 👤 Shigeaki Okano
- 👤 Masatoshi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:39
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
A PROCESS FOR THE POLYERMIZATION OF AN OLEFIN WHICH COMPRISES REACTING SAID OLEFIN IN CONTACT WITH A CATALYST SYSTEM COMPRISING (A) AN ORGANIC-ALUMINUM COMPOUND OF THE FORMULA AIRNX3-N WHEREIN R REPRESENTS A HYDROCARBON GROUP OF 1-14 CARBON ATOMS; X REPRESENTS A HYDROGEN ATOM, HALOGEN ATOM OR AN ALKOXY GROUP; AND N REPRESENTS AN INTEGER OF 1-3; AND (B) A SOLID CATALYST REACTION PRODUCT OF AN ORGANO-TIN COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
70 words
A PROCESS FOR THE POLYERMIZATION OF AN OLEFIN WHICH COMPRISES REACTING SAID OLEFIN IN CONTACT WITH A CATALYST SYSTEM COMPRISING (A) AN ORGANIC-ALUMINUM COMPOUND OF THE FORMULA AIRNX3-N WHEREIN R REPRESENTS A HYDROCARBON GROUP OF 1-14 CARBON ATOMS; X REPRESENTS A HYDROGEN ATOM, HALOGEN ATOM OR AN ALKOXY GROUP; AND N REPRESENTS AN INTEGER OF 1-3; AND (B) A SOLID CATALYST REACTION PRODUCT OF AN ORGANO-TIN COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
22 words
The process of claim 1, wherein the olefin is selected from the group consisting of ethylene, propylene, butene-1, butadiene and mixtures thereof.
Claim 4
Dependent Claim
37 words
The process of claim 1, wherein the catalyst system is dispersed in an inert medium and polymerization is conducted at a temperature of from normal temperature to 250*C, under a pressure of atmospheric pressure to 100 atm.
Claim 5
Dependent Claim
31 words
The process of claim 1, wherein 20 - 500 molar percent of hydrogen based on the moles of olefin is supplied to the polymerization reaction system to control molecular weight distribution.
Claim 6
Dependent Claim
126 words
The process of claim 1, wherein said solid catalyst reaction product is formed in the presence of a solid compound prepared by reducing a vanadium compound having the formula VO(OR)3 mXm, wherein R reppresents an alkyl group, X represents a halogen atom and m represents an integer of 0 - 3 and a titanium compound having the formula Ti(OR)nX4 n, wherein R represents alkyl, X represents halogen and n represents an integer of 0 - 4 with an organo-tin compound of the formula SnR3Y, wherein R represents a hydrocarbon group of 1 - 14 carbon atoms, Y represents halogen or an alkoxy group of 1 - 14 carbon atoms and a Group III metal halide selected from the group consisting of aluminum trihalide and boron trihalide.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |