Patent US3047622A successfully refreshed from Google Patents.
US3047622A
Expired / Lapsed
US
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Production of carboxylic acids
Assignee: Shell USA Inc
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Filing: 1958-09-16
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Granted: 1962-07-31
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Expires: 1978-09-16
Abstract
No abstract record available.
Inventors
- 👤 George A Kurhajec
- 👤 Dwight L Johnston
- 👤 Kenneth E Furman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:55
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/14; Y; Y10; Y10T; Y10T24/00; Y10T24/13; Y10T24/1321; Y10T24/1324; Y10T24/1347
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE PROCESS FOR THE PRODUCTION OF TRIMETHYLACETIC ACID WHICH COMPRISES ADMIXING ISOBUTYLENE WITH DILUTE AQUEOUS SULFURIC ACID HAVING A SULFURIC ACID CONTENT OF FROM ABOUT 60 TO 80% BY WEIGHT, COMBINING THE RESULTING ADMIXTURE WITH SUFFICIENT CONCENTRATED SULFURIC ACID UNDER CARBON MONOXIDE PRESSURE TO OBTAIN A FORTIFIED ADMIXTURE OF ISOBUTYLENE WITH SULFURIC ACID OF AT LEAST 90% CONCENTRATION, REACTING SAID FORTIFIED ADMIXTURE WITH CARBON MONOXIDE AT A TEMPERATURE OFFROM ABOUT -10 TO ABOUT 100*C., AND A CARBON MONOXIDE PRESSURE OF FROM ABOUT ATMOSPHERIC TO ABOUT 1500 P.S.I.G., REACTING THE RESULTING REACTION MIXTURE WITH WATER, THEREBY FORMING A DILUTE REACTION MIXTURE COMPRISING TRIMETHYLACETIC ACID AND DILUTE AQUEOUS SULFURIC ACID, AND SEPARATING TRIMETHYLACETIC ACID FROM SAID DILUTE REACTION MIXTURE.
Claim 2
Dependent Claim
117 words
THE PROCESS FOR THE PRODUCTION OF TRIMETHYLACETIC ACID WHICH COMPRISES ADMIXING ISOBUTYLENE WITH DILUTE AQUEOUS SULFURIC ACID HAVING A SULFURIC ACID CONTENT OF FROM ABOUT 60 TO 80% BY WEIGHT, COMBINING THE RESULTING ADMIXTURE WITH SUFFICIENT CONCENTRATED SULFURIC ACID UNDER CARBON MONOXIDE PRESSURE TO OBTAIN A FORTIFIED ADMIXTURE OF ISOBUTYLENE WITH SULFURIC ACID OF AT LEAST 90% CONCENTRATION, REACTING SAID FORTIFIED ADMIXTURE WITH CARBON MONOXIDE AT A TEMPERATURE OFFROM ABOUT -10 TO ABOUT 100*C., AND A CARBON MONOXIDE PRESSURE OF FROM ABOUT ATMOSPHERIC TO ABOUT 1500 P.S.I.G., REACTING THE RESULTING REACTION MIXTURE WITH WATER, THEREBY FORMING A DILUTE REACTION MIXTURE COMPRISING TRIMETHYLACETIC ACID AND DILUTE AQUEOUS SULFURIC ACID, AND SEPARATING TRIMETHYLACETIC ACID FROM SAID DILUTE REACTION MIXTURE.
References Cited (Backward Citations)
US2419131A
Cited
US2813877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |