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Patent US3236785A successfully refreshed from Google Patents.
US3236785A
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Polymerization of epoxides using a pyrophosphoric acid-metal halide reaction productas catalyst
Assignee: ExxonMobil Oil Corp
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Filing: 1962-09-21
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Granted: 1966-02-22
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Expires: 1982-09-21
Abstract
No abstract record available.
Inventors
- 👤 Paul A Naro
- 👤 Robert D Offenhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:35
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2654; C08G65/269
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS WHICH COMPRISES POLYMERIZING A VICINAL MONOEPOXIDE COMPOUND CONTAINING FROM 2 TO 18 CARBON ATOMS AND FREE FROM ETHYLENIC AND ACETYLENIC UNSATURATION IN THE PRESENCE OF ABOUT 0.005 TO ABOUT 15 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE MONOEPOXIDE COMPOUND, OF THE SOLID REACTION PRODUCT OF PYROPHOSPHORIC ACID AND A METAL HALIDE WHEREIN THE METAL PORTION OF SAID METAL HALIDE IS SELECTED FROM THE GROUP CONSISTING OF BORON, ALUMINUM, GALLIUM, INDIUM AND THALLIUM, THE REACTION PRODUCT BEING PREPARED BY REACTING PYROPHOSPHORIC ACID WITH AT LEAST ABOUT A MOLAR EQUIVALENT OF THE METAL HALIDE, NEUTRALIZING TO A PH BETWEEN ABOUT 5 AND ABOUT 7, AND DRYING AND CALCINING TO PRODUCE A CATALYTICALLY ACTIVE PRODUCT; AT A POLYMERIZATION TEMPERATURE FROM ABOUT 20*C. TO ABOUT 150*C. FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE A SOLID POLYMER.
Claim 2
Dependent Claim
136 words
A PROCESS WHICH COMPRISES POLYMERIZING A VICINAL MONOEPOXIDE COMPOUND CONTAINING FROM 2 TO 18 CARBON ATOMS AND FREE FROM ETHYLENIC AND ACETYLENIC UNSATURATION IN THE PRESENCE OF ABOUT 0.005 TO ABOUT 15 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE MONOEPOXIDE COMPOUND, OF THE SOLID REACTION PRODUCT OF PYROPHOSPHORIC ACID AND A METAL HALIDE WHEREIN THE METAL PORTION OF SAID METAL HALIDE IS SELECTED FROM THE GROUP CONSISTING OF BORON, ALUMINUM, GALLIUM, INDIUM AND THALLIUM, THE REACTION PRODUCT BEING PREPARED BY REACTING PYROPHOSPHORIC ACID WITH AT LEAST ABOUT A MOLAR EQUIVALENT OF THE METAL HALIDE, NEUTRALIZING TO A PH BETWEEN ABOUT 5 AND ABOUT 7, AND DRYING AND CALCINING TO PRODUCE A CATALYTICALLY ACTIVE PRODUCT; AT A POLYMERIZATION TEMPERATURE FROM ABOUT 20*C. TO ABOUT 150*C. FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE A SOLID POLYMER.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |