Patent US3377401A successfully refreshed from Google Patents.
US3377401A
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Process for separating isobutylene from a hydrocarbon stream
Assignee: Texaco Inc
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Filing: 1965-11-17
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Granted: 1968-04-09
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Expires: 1985-11-17
Abstract
No abstract record available.
Inventors
- 👤 Stanley R Newman
- 👤 George W Eckert
- 👤 Howard V Hess
- 👤 Robert Y Heisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:56
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/17; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/932
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR SEPARATING ISOBUTYLENE FROM A MIXTURE OF C4 HYDROCARBONS WHICH COMPRISES CONTACTING SAID C4 HYDROCARBON MIXTURE WITH A HYDROCARBYL MONOCARBOXYLIC ACID IN A REACTION ZONE AT A TEMPERATURE BETWEEN 400 AND 300*F. AND A PRESSURE BETWEEN 40 AND 300 P.S.I.G. WHEREBY A T-BUTYL ESTER OF SAID MONOCARBOXYLIC ACID IS FORMED TO THE EXCLUSION OF ISOMERIC BUTYL ESTERS, SEPARATING UNREACTED C4 HYDROCARBONS FROM THE RESULTING REACTION MIXTURE TO FORM AN ACIDIC RESIDUE COMPRISING SAID T-BUTYL ESTER AND FREE MONOCARBOXYLIC ACID, HEATING SAID ACIDIC RESIDUE AT A TEMPERATURE BETWEEN 100 AND 510*F. AND AT A PRESSURE BETWEEN ATMOSPHERIC AND 30 P.S.I.G. TO DECOMPOSE SAID T-BUTYL ESTER TO MONOCARBOXYLIC ACID AND ISOBUTYLENE AND SEPARATING SAID ISOBUTYLENE FROM SAID MONOCARBOXYLIC AICD.
Claim 2
Dependent Claim
119 words
A PROCESS FOR SEPARATING ISOBUTYLENE FROM A MIXTURE OF C4 HYDROCARBONS WHICH COMPRISES CONTACTING SAID C4 HYDROCARBON MIXTURE WITH A HYDROCARBYL MONOCARBOXYLIC ACID IN A REACTION ZONE AT A TEMPERATURE BETWEEN 400 AND 300*F. AND A PRESSURE BETWEEN 40 AND 300 P.S.I.G. WHEREBY A T-BUTYL ESTER OF SAID MONOCARBOXYLIC ACID IS FORMED TO THE EXCLUSION OF ISOMERIC BUTYL ESTERS, SEPARATING UNREACTED C4 HYDROCARBONS FROM THE RESULTING REACTION MIXTURE TO FORM AN ACIDIC RESIDUE COMPRISING SAID T-BUTYL ESTER AND FREE MONOCARBOXYLIC ACID, HEATING SAID ACIDIC RESIDUE AT A TEMPERATURE BETWEEN 100 AND 510*F. AND AT A PRESSURE BETWEEN ATMOSPHERIC AND 30 P.S.I.G. TO DECOMPOSE SAID T-BUTYL ESTER TO MONOCARBOXYLIC ACID AND ISOBUTYLENE AND SEPARATING SAID ISOBUTYLENE FROM SAID MONOCARBOXYLIC AICD.
References Cited (Backward Citations)
US3026362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |