US3318913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing alpha-methylgamma-butyrolactone
Assignee: Shell USA Inc
•
Filing: 1966-02-18
•
Granted: 1967-05-09
•
Expires: 1986-02-18
Abstract
No abstract record available.
Inventors
- 👤 Jurgen F Falbe
- 👤 Huppes Nicolaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:14
CPC Classifications
C; C07; C07D; C07D315/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE PROCESS OF PRODUCING A-METHYL-$-BUTYROLACTONE WHICH COMPRISES INITIALLY INTIMATELY CONTACTING (A) LOWER ALKYL ESTER OF METHACRYLIC ACID, (B) CARBON MONOXIDE, AND (C) FROM ABOUT 0.25 MOLES TO ABOUT 4 MOLES OF HYDROGEN PER MOLE OF CARBON MONOXIDE, IN LIQUID-PHASE SOLUTION IN INERT SOLVENT IN THE PRESENCE OF FROM ABOUT 0.0001 GRAM-ATOM TO ABOUT 0.01 GRAM-ATOM OF RHODIUM CATALYST PER MOLE OF THE METHACRYLATE ESTER AND UP TO ABOUT 10% BY WEIGHT BASED ON THE METHACRYLATE ESTER OF A TERTIARY AMINE AT A TEMPERATURE FROM ABOUT 120*C. TO ABOUT 180*C. AND A PRESSURE OF FROM ABOUT 75 ATMOSPHERES TO ABOUT 1000 ATMOSPHERES; AND SUBSEQUENTLY MAINTAINING THE RESULTING MIXTURE AT A TEMPERATURE FROM ABOUT 180* C. TO ABOUT 250*C., THEREBY HYDROGENATING AND LACTONIZING THE B-FORMYLISOBUTYRATE ESTER PRODUCT RESULTING FROM SAID INITIAL INTIMATE CONTACTING.
Claim 2
Dependent Claim
131 words
THE PROCESS OF PRODUCING A-METHYL-$-BUTYROLACTONE WHICH COMPRISES INITIALLY INTIMATELY CONTACTING (A) LOWER ALKYL ESTER OF METHACRYLIC ACID, (B) CARBON MONOXIDE, AND (C) FROM ABOUT 0.25 MOLES TO ABOUT 4 MOLES OF HYDROGEN PER MOLE OF CARBON MONOXIDE, IN LIQUID-PHASE SOLUTION IN INERT SOLVENT IN THE PRESENCE OF FROM ABOUT 0.0001 GRAM-ATOM TO ABOUT 0.01 GRAM-ATOM OF RHODIUM CATALYST PER MOLE OF THE METHACRYLATE ESTER AND UP TO ABOUT 10% BY WEIGHT BASED ON THE METHACRYLATE ESTER OF A TERTIARY AMINE AT A TEMPERATURE FROM ABOUT 120*C. TO ABOUT 180*C. AND A PRESSURE OF FROM ABOUT 75 ATMOSPHERES TO ABOUT 1000 ATMOSPHERES; AND SUBSEQUENTLY MAINTAINING THE RESULTING MIXTURE AT A TEMPERATURE FROM ABOUT 180* C. TO ABOUT 250*C., THEREBY HYDROGENATING AND LACTONIZING THE B-FORMYLISOBUTYRATE ESTER PRODUCT RESULTING FROM SAID INITIAL INTIMATE CONTACTING.
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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |