US4284748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization
Assignee: Phillips Petroleum Co
•
Filing: 1979-09-07
•
Granted: 1981-08-18
•
Expires: 1999-09-07
Abstract
Abstract Polymerization of olefins in the presence of a catalyst system comprising a titanium-containing composition associated with silica and a cocatalyst comprising a metal hydride or organic metal compound derived from an element of Groups I-III of the Periodic Table.
Inventors
- 👤 Melvin B. Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:43
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
131 words
A catalyst for the polymerization of olefins consisting essentially of two components wherein component A is formed in an inert hydrocarbon diluent by (1) reacting a silicon-containing finely divided solid in which the silica content ranges from about 80-100 weight percent with a tetravalent titanium alkoxide compound in which the alkyl group of the alkoxide contains from 1 to about 12 carbon atoms; (2) contacting the product obtained in step (1) with an organomagnesium compound wherein the organo portion is a hydrocarbyl group of 1 to about 12 carbon atoms; and (3) treating the product obtained in step (2) with a titanium tetrahalide; and component B is a metallic hydride or organometallic compound wherein said metal is selected from a metal of Groups IA, IIA, and IIIA of the Periodic Table.
Claim 2
Dependent Claim
131 words
A catalyst for the polymerization of olefins consisting essentially of two components wherein component A is formed in an inert hydrocarbon diluent by (1) reacting a silicon-containing finely divided solid in which the silica content ranges from about 80-100 weight percent with a tetravalent titanium alkoxide compound in which the alkyl group of the alkoxide contains from 1 to about 12 carbon atoms; (2) contacting the product obtained in step (1) with an organomagnesium compound wherein the organo portion is a hydrocarbyl group of 1 to about 12 carbon atoms; and (3) treating the product obtained in step (2) with a titanium tetrahalide; and component B is a metallic hydride or organometallic compound wherein said metal is selected from a metal of Groups IA, IIA, and IIIA of the Periodic Table.
Claim 3
Dependent Claim
75 words
A catalyst according to claim 1 wherein the mole ratio of silica to tetravalent titanium compound in step (1) ranges from 5:1 to 100:1, the mole ratio of initial tetravalent titanium compound in step (1) to organometal compound in step (2) ranges from about 0.5:1 to about 25:1 and the mole ratio of titanium tetrahalide added in step (3) to the combined moles of components of step (2) ranges from about 100:1 to about 1:1.
Claim 4
Dependent Claim
16 words
A catalyst according to claim 1 wherein said titanium tetrahalide in step (3) is titanium tetrachloride.
Claim 5
Dependent Claim
50 words
A catalyst according to claim 1 wherein component A is formed by (1) reacting silica with titanium tetraisopropoxide or titanium tetraethoxide; (2) contacting the product of step (1) with n-butyl, sec-butyl magnesium or n-amyl-sec-butylmagnesium and (3) reacting the product of step (2) with titanium tetrachloride and component B is triethylaluminum.
Claim 6
Dependent Claim
77 words
A catalyst according to claim 1 wherein the mole ratio of silica to tetravalent titanium compound in step (1) ranges from about 10:1 to about 75:1, the mole ratio of initial tetravalent titanium compound in step (1) to organometal compound in step (2) ranges from about 1:1 to about 15:1 and the mole ratio of titanium tetrahalide added in step (3) to the combined moles of components of step (2) ranges from about 10:1 to about 1:1.
Claim 7
Independent Claim
123 words
A method of preparation of a polymerization catalyst which comprises forming a component A by sequentially reacting in an inert hydrocarbon diluent (1) a silicon-containing finely divided inorganic solid in which the silica content ranges from about 80 to 100 weight percent; (2) at least one tetravalent titanium alkoxide compound in which the alkyl group of the alkoxide contains from 1 to about 12 carbon atoms; (3) an organomagnesium compound wherein the organo portion is a hydrocarbyl group of 1 to about 12 carbons; and (4) a titanium tetrahalide; and then combining component A with component B which is a metallic hydride or organometallic compound wherein said metal is selected from a metal of Groups IA, IIA, and IIIA of the Periodic Table.
Claim 8
Independent Claim
123 words
A method of preparation of a polymerization catalyst which comprises forming a component A by sequentially reacting in an inert hydrocarbon diluent (1) a silicon-containing finely divided inorganic solid in which the silica content ranges from about 80 to 100 weight percent; (2) at least one tetravalent titanium alkoxide compound in which the alkyl group of the alkoxide contains from 1 to about 12 carbon atoms; (3) an organomagnesium compound wherein the organo portion is a hydrocarbyl group of 1 to about 12 carbons; and (4) a titanium tetrahalide; and then combining component A with component B which is a metallic hydride or organometallic compound wherein said metal is selected from a metal of Groups IA, IIA, and IIIA of the Periodic Table.
Claim 9
Dependent Claim
27 words
A method according to claim 6 wherein the final product is washed with an inert solvent to remove unreacted titanium compound prior to combining with component B.
Claim 10
Dependent Claim
14 words
A method according to claim 6 wherein the reactants are contacted under refluxing conditions.
Claim 11
Dependent Claim
95 words
A method according to claim 6 wherein component A is formed by the steps of (1) reacting a silicon-containing finely divided solid in which the silica content ranges from about 80-100 weight percent with a tetravalent titanium alkoxide compound in which the alkyl group of the alkoxide contains from 1 to about 12 carbon atoms; (2) contacting the product obtained in step (1) with an organomagnesium compound wherein the organo portion is a hydrocarbyl group of 1 to about 12 carbon atoms; and (3) treating the product obtained in step (2) with a titanium tetrahlide.
Claim 12
Dependent Claim
29 words
A method according to claim 9 wherein the product of step (3) is washed with an inert solvent to remove unreacted titanium compound prior to combining with component B.
Claim 13
Dependent Claim
16 words
A method according to claim 6 wherein said titanium tetrahalide in step (3) is titanium tetrachloride.
Claim 14
Dependent Claim
26 words
A process for the polymerization of olefins which comprises contacting at least one aliphatic 1-olefin with a catalyst as defined in claim 1 under polymerization conditions.
Claim 15
Dependent Claim
11 words
A process according to claim 12 wherein the olefin is ethylene.
Claim 16
Dependent Claim
26 words
A process for the polymerization of olefins which comprises contacting at least one aliphatic 1-olefin with a catalyst as defined in claim 4 under polymerization conditions.
Claim 17
Dependent Claim
11 words
A process according to claim 14 wherein the olefin is ethylene.
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) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |