Patent US2936302A successfully refreshed from Google Patents.
US2936302A
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Olefin polymerization with pretreated catalyst
Assignee: Petro Tex Chemical Corp
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Filing: 1957-08-12
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Granted: 1960-05-10
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Expires: 1977-08-12
Abstract
No abstract record available.
Inventors
- 👤 Robert H Jones
- 👤 Roger M Nagel
- 👤 Calvin N Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:34
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/903; Y10S526/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A PROCESS FOR PRODUCING POLYOLEFINS WHICH CONTAIN A HIGH PROPORATION OF CRYSTALLINE POLYMER COMPRISING THE STEPS OF (1) FIRST HEATING TO ABOUT 75* TO 160*C. A MIXTURE COMPRISING AN ALKYL ALUMINUM CHLORIDE WHEREIN SAID ALKYL GROUPS CONTAIN ABOUT 2 TO 8 CARBON ATOMS, A TETRAALKYL TITANIUM ESTER WHEREIN SAID ALKYL GROUP CONTAIN 3 TO 18 CARBON ATOMS, IN A MOLAR RATIO OF 3 TO 25 MOLS OF ALKYL ALUMINUM CHLORIDE COMPOUND PER MOL OF TERTRAALKYL TITANIUM ESTER, AND A SMALL AMOUNT OF AN ALPHA OLEFIN CONTAINING 2 TO 8 CARBON ATOMS, (2) COOLING SAID MIXTURE TO BELOW ABOUT 75*C. AND THEREAFTER (3) CONTACTING SAID MIXTURE WITH AN ALPHA-OLEFIN CONTAINING 2 TO 8 CARBON ATOMS AND POLYMERIZING SAID ALPHA-OLEFIN IN THE PRESENCE OF SAID MIXTURE, THE AMOUNT OF ALPHA-OLEFIN BEING CHARGED IN (1) BEING FROM ABOUT 0.1 TO ABOUT 15 PERCENT OF THE TOTAL ALPHA-OLEFIN IN (3).
Claim 2
Dependent Claim
146 words
A PROCESS FOR PRODUCING POLYOLEFINS WHICH CONTAIN A HIGH PROPORATION OF CRYSTALLINE POLYMER COMPRISING THE STEPS OF (1) FIRST HEATING TO ABOUT 75* TO 160*C. A MIXTURE COMPRISING AN ALKYL ALUMINUM CHLORIDE WHEREIN SAID ALKYL GROUPS CONTAIN ABOUT 2 TO 8 CARBON ATOMS, A TETRAALKYL TITANIUM ESTER WHEREIN SAID ALKYL GROUP CONTAIN 3 TO 18 CARBON ATOMS, IN A MOLAR RATIO OF 3 TO 25 MOLS OF ALKYL ALUMINUM CHLORIDE COMPOUND PER MOL OF TERTRAALKYL TITANIUM ESTER, AND A SMALL AMOUNT OF AN ALPHA OLEFIN CONTAINING 2 TO 8 CARBON ATOMS, (2) COOLING SAID MIXTURE TO BELOW ABOUT 75*C. AND THEREAFTER (3) CONTACTING SAID MIXTURE WITH AN ALPHA-OLEFIN CONTAINING 2 TO 8 CARBON ATOMS AND POLYMERIZING SAID ALPHA-OLEFIN IN THE PRESENCE OF SAID MIXTURE, THE AMOUNT OF ALPHA-OLEFIN BEING CHARGED IN (1) BEING FROM ABOUT 0.1 TO ABOUT 15 PERCENT OF THE TOTAL ALPHA-OLEFIN IN (3).
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) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |