Patent US3926928A successfully refreshed from Google Patents.
US3926928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst and process for the polymerization of alpha-olefins
Assignee: Standard Oil Co
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Filing: 1973-08-27
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Granted: 1975-12-16
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Expires: 1993-08-27
Abstract
Abstract A novel catalyst and process for producing crystalline polypropylene and its copolymers with other alpha-olefins which can substantially reduce the amount of low-molecular-weight and amorphous polymers formed without reduction in the polymerization rate. This novel catalyst and process are useful in slurry polymerization, bulk polymerization and polymerization techniques in which polymerization is accomplished utilizing monomer substantially in the vapor phase.
Inventors
- 👤 Nicholas M Karayannis
- 👤 Missak Khelghatian
- 👤 Sam S Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:33
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
56 words
A COMPOSITION WHICH COMPRISES: A. A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A TRIALKYL ALUMINUM, A MIXTURE OF TRIALKYL ALUMINUM AND AN ALKYLALUMINUM DICHLORIDE OR DIBROMIDE, A MIXTURE OF A TRIALKYL ALUMINUM AND A DIALKYALUMINUM CHLORIDE OR BROMIDE AND A DIALKYLALUMINUM CHLORIDE OR BROMIDE, B. TITANIUM TRICHLORIDE, C. AN ALKYLTIN SULFIDE, AND D. A TRIHYDROCARBYLPHOSPHITE.
Claim 2
Dependent Claim
56 words
A COMPOSITION WHICH COMPRISES: A. A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A TRIALKYL ALUMINUM, A MIXTURE OF TRIALKYL ALUMINUM AND AN ALKYLALUMINUM DICHLORIDE OR DIBROMIDE, A MIXTURE OF A TRIALKYL ALUMINUM AND A DIALKYALUMINUM CHLORIDE OR BROMIDE AND A DIALKYLALUMINUM CHLORIDE OR BROMIDE, B. TITANIUM TRICHLORIDE, C. AN ALKYLTIN SULFIDE, AND D. A TRIHYDROCARBYLPHOSPHITE.
Claim 3
Dependent Claim
51 words
A COMPOSITION WHICH COMPRISES: A. A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A TRIALKYL ALUMINUM. A MIXTURE OF A TRIALKYL ALUMINUM AND AN ALKYLALUMINUM DICHLORIDE, A MIXTURE OF A TRIALKYL ALUMINUM AND A DIALKYLALUMINUM CHLORIDE AND A DIALKYL-ALUMINUM CHLORIDE, B. TITANIUM TRICHLORIDE, C. AN ALKYLTIN SULFIDE, AND D. A TRIHYDROCARBYLPHOSPHITE
Claim 4
Dependent Claim
51 words
A COMPOSITION WHICH COMPRISES: A. A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A TRIALKYL ALUMINUM. A MIXTURE OF A TRIALKYL ALUMINUM AND AN ALKYLALUMINUM DICHLORIDE, A MIXTURE OF A TRIALKYL ALUMINUM AND A DIALKYLALUMINUM CHLORIDE AND A DIALKYL-ALUMINUM CHLORIDE, B. TITANIUM TRICHLORIDE, C. AN ALKYLTIN SULFIDE, AND D. A TRIHYDROCARBYLPHOSPHITE
Claim 5
Dependent Claim
21 words
A COMPOSITION WHICH COMPRISES: A. A DIALKYLALUMINUM CHLORIDE, AND B. TITANIUM TRICHLORIDE, AND C. AN ALKYLTIN SULFIDE, AND D. A TRIHYDROCARBYLPHOSPHITE.
Claim 6
Dependent Claim
21 words
A COMPOSITION WHICH COMPRISES: A. A DIALKYLALUMINUM CHLORIDE, AND B. TITANIUM TRICHLORIDE, AND C. AN ALKYLTIN SULFIDE, AND D. A TRIHYDROCARBYLPHOSPHITE.
Claim 7
Dependent Claim
16 words
The composition of claim 1 wherein (c) is a bis-(trialkyl)tin sulfide and (d) is a trialkylphosphite.
Claim 8
Dependent Claim
16 words
The composition of claim 2 wherein (c) is a bis-(trialkyl)tin sulfide and (d) is a trialkylphosphite.
Claim 9
Dependent Claim
16 words
The composition of claim 3 wherein (c) is a bis-(trialkyl)tin sulfide and (d) is a trialkylphosphite.
Claim 10
Dependent Claim
14 words
The composition of claim 6 wherein (c) is bis-(tributyl)tin sulfide and (d) is tributylphosphite.
Claim 11
Dependent Claim
97 words
A PROCESS WHEREIN PROPYLENE OR PROPYLENE AND AT LEAST 1 OTHER ALPHA-OLEFIN OF FROM 2 TO ABOUT 8 CARBON ATOMS IS CONTACTED BY AT LAST A CATALYTIC AMOUNT OF A COMPOSITION TO FORM HIGHLY-CRYSTALLINE POLYPROPYLENE OR COPOLYMER WHEREIN THE POLYPROPYLENE IS STILL SUBSTANTIALLY CRYSTALLINE COMPRISING: A. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A TRIALKYL ALUMINUM, A MIXTURE OF TRIALKYL ALUMINUM AND AN ALKYLALUMINUM DICHLORIDE OR DIBROMIDE, A MIXTURE OF A TRIALKYL ALUMINUM AND A DIALKYLALUMINUM CHLORIDE OR BROMIDE, AND A DIALKYLALUMINUM CHLORIDE OR BROMIDE, B. TITANIUM TRICHLORIDE, C. AN ALKYLTIN SULFIDE, AND D. A TRIHYDROCARBYLPHOSPHITE.
Claim 12
Dependent Claim
97 words
A PROCESS WHEREIN PROPYLENE OR PROPYLENE AND AT LEAST 1 OTHER ALPHA-OLEFIN OF FROM 2 TO ABOUT 8 CARBON ATOMS IS CONTACTED BY AT LAST A CATALYTIC AMOUNT OF A COMPOSITION TO FORM HIGHLY-CRYSTALLINE POLYPROPYLENE OR COPOLYMER WHEREIN THE POLYPROPYLENE IS STILL SUBSTANTIALLY CRYSTALLINE COMPRISING: A. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A TRIALKYL ALUMINUM, A MIXTURE OF TRIALKYL ALUMINUM AND AN ALKYLALUMINUM DICHLORIDE OR DIBROMIDE, A MIXTURE OF A TRIALKYL ALUMINUM AND A DIALKYLALUMINUM CHLORIDE OR BROMIDE, AND A DIALKYLALUMINUM CHLORIDE OR BROMIDE, B. TITANIUM TRICHLORIDE, C. AN ALKYLTIN SULFIDE, AND D. A TRIHYDROCARBYLPHOSPHITE.
Claim 13
Dependent Claim
89 words
A PROCESS WHEREIN PROPYLENE OR PROPYLENE AND AT LEAST 1 ALPHA-OLEFIN OF FROM 2 TO ABOUT 8 CARBON ATOMS IS CONTACTED BY AT LAST A CATALYTIC AMOUNT OF A COMPOSITION TO FORM HIGHLYCRYSTALLINE POLYPROPYLENE OR COPOLYMER WHEREIN THE POLYPROPYLENE IS STILL SUBSTANTIALLY CRYSTALLINE COMPRISING: A. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A TRIALKYL ALUMINUM, A MIXTURE OF A TRIALKYL ALUMINUM AND AN ALKYLALUMINUM DICHLORIDE, A MIXTURE OF TRIALKYL-ALUMINUM AND A DIALKYL-ALUMINUM CHLORIDE AND A DIALKYLALUMINUM CHLORIDE, B. TITANIUM TRICHLORIDE, C. AN ALKYLTIN SULFIDE, AND D. A TRIHYDROCARBYLPHOSPHITE.
Claim 14
Dependent Claim
89 words
A PROCESS WHEREIN PROPYLENE OR PROPYLENE AND AT LEAST 1 ALPHA-OLEFIN OF FROM 2 TO ABOUT 8 CARBON ATOMS IS CONTACTED BY AT LAST A CATALYTIC AMOUNT OF A COMPOSITION TO FORM HIGHLYCRYSTALLINE POLYPROPYLENE OR COPOLYMER WHEREIN THE POLYPROPYLENE IS STILL SUBSTANTIALLY CRYSTALLINE COMPRISING: A. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A TRIALKYL ALUMINUM, A MIXTURE OF A TRIALKYL ALUMINUM AND AN ALKYLALUMINUM DICHLORIDE, A MIXTURE OF TRIALKYL-ALUMINUM AND A DIALKYL-ALUMINUM CHLORIDE AND A DIALKYLALUMINUM CHLORIDE, B. TITANIUM TRICHLORIDE, C. AN ALKYLTIN SULFIDE, AND D. A TRIHYDROCARBYLPHOSPHITE.
Claim 15
Dependent Claim
59 words
A process wherein propylene or propylene and at least 1 alpha-olefin of from 2 to about 8 carbon atoms is contacted by at least a catalytic amount of a composition to form highly-crystalline polypropylene or copolymer wherein the polypropylene is still substantially crystalline comprising: a. a dialkylaluminum chloride, b. titanium trichloride, c. an alkyltin sulfide, and d. a trihydrocarbylphosphite.
Claim 16
Dependent Claim
59 words
A process wherein propylene or propylene and at least 1 alpha-olefin of from 2 to about 8 carbon atoms is contacted by at least a catalytic amount of a composition to form highly-crystalline polypropylene or copolymer wherein the polypropylene is still substantially crystalline comprising: a. a dialkylaluminum chloride, b. titanium trichloride, c. an alkyltin sulfide, and d. a trihydrocarbylphosphite.
Claim 17
Dependent Claim
16 words
The process of claim 8 wherein (c) is a bis-(trialkyl)tin sulfide and (d) is a trialkylphosphite.
Claim 18
Dependent Claim
16 words
The process of claim 9 wherein (c) is a bis-(trialkyl)tin sulfide and (d) is a trialkylphosphite.
Claim 19
Dependent Claim
15 words
The process of claim 10 wherein (c) is bis-(trialkyl)tin sulfide and (d) is a trialkylphosphite.
Claim 20
Dependent Claim
14 words
The process of claim 13 wherein (c) is bis-(tributyl)tin sulfide and (d) is tributylphosphite.
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 |