US3026362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation and utilization of isobutylene
Assignee: Rohm and Haas Co
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Filing: 1959-06-05
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Granted: 1962-03-20
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Expires: 1979-06-05
Abstract
No abstract record available.
Inventors
- 👤 Mckeever Charles Harlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:29
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J31/10; C; C07; C07C; C07C7/00; C07C7/148; C07C7/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PROCESS FOR THE SEPARATION OF ISOBUTYLENE FROM A MIXTURE OF HYDROCARBON GASES CONTAINING ISOBUTYLENE AND NORMAL OLEFINS WHICH COMPRISES CONTACTING SAID MIXTURE WITH A LOWER ALKANOIC ACID CONTAINING 1 TO 4 CARBON ATOMS FOR FROM ABOUT FIVE MINUTES TO ABOUT SIX HOURS IN THE PRESENCE OF A DEHYDRATED SULFONIC ACID CATION EXCHANGE RESIN WHICH POSSESSES A MACRO-RETICULAR STRUCTURE AT A TEMPERATURE FROM ABOUT -10*C. TO ABOUT 50*C., WHEREBY SAID ISOBUTYLENE AND SAID LOWER ALKANOIC ACID REACT WHEREBY A T-BUTYL LOWER ALKANOATE IS FORMED, SEPARATING SAID RESIN AND SAID REACTION MIXTURE, TAKING OFF THE UNREACTED GASES FROM THE MIXTURE, DISTILLING THE REACTION MIXTURE, RECOVERING T-BUTYL LOWER ALKANOATE, HEATING UNDER REFLUX SAID T-BUTYL LOWER ALKANOATE IN THE PRESENCE OF A DEHYDRATED SULFONIC ACID TYPE CATION EXCHANGE RESIN WHICH POSSESSES A MACRO-RETICULAR STRUCTURE, AND TAKING OFF THE ISOBUTYLENE SO PRODUCED.
Claim 2
Dependent Claim
138 words
A PROCESS FOR THE SEPARATION OF ISOBUTYLENE FROM A MIXTURE OF HYDROCARBON GASES CONTAINING ISOBUTYLENE AND NORMAL OLEFINS WHICH COMPRISES CONTACTING SAID MIXTURE WITH A LOWER ALKANOIC ACID CONTAINING 1 TO 4 CARBON ATOMS FOR FROM ABOUT FIVE MINUTES TO ABOUT SIX HOURS IN THE PRESENCE OF A DEHYDRATED SULFONIC ACID CATION EXCHANGE RESIN WHICH POSSESSES A MACRO-RETICULAR STRUCTURE AT A TEMPERATURE FROM ABOUT -10*C. TO ABOUT 50*C., WHEREBY SAID ISOBUTYLENE AND SAID LOWER ALKANOIC ACID REACT WHEREBY A T-BUTYL LOWER ALKANOATE IS FORMED, SEPARATING SAID RESIN AND SAID REACTION MIXTURE, TAKING OFF THE UNREACTED GASES FROM THE MIXTURE, DISTILLING THE REACTION MIXTURE, RECOVERING T-BUTYL LOWER ALKANOATE, HEATING UNDER REFLUX SAID T-BUTYL LOWER ALKANOATE IN THE PRESENCE OF A DEHYDRATED SULFONIC ACID TYPE CATION EXCHANGE RESIN WHICH POSSESSES A MACRO-RETICULAR STRUCTURE, AND TAKING OFF THE ISOBUTYLENE SO PRODUCED.
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) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |