US4096194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High purity iso-butylene recovery
Assignee: Citgo Petroleum Corp
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Filing: 1976-08-02
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Granted: 1978-06-20
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Expires: 1996-08-02
Abstract
Abstract An improved process for hydrating with liquid water over a solid catalyst and with a liquid solvent a liquid iso-olefin selected from the group consisting of C 4 iso-olefins and C 5 iso-olefins to form a corresponding product alcohol in the liquid state. The improvement comprises maintaining the liquid iso-olefins, the solvent, and the water in a single liquid phase in order to increase the conversion percentage of the iso-olefin to the corresponding alcohol.
Inventors
- 👤 David Moy
- 👤 Marvin S. Rakow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:17
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/03; C07C29/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
An improved process for hydrating, with liquid water over a solid catalyst and with a liquid solvent, isobutylene to form tertiary butyl alcohol in the liquid state, wherein the improvement comprises using a solvent selected from the group consisting of glycols, glycol ethers, and glycol diethers, and maintaining a solvent-to-water weight ratio of from about 5:1 to about 20:1, thus maintaining a single liquid phase for the reaction mixture and increasing the conversion percentage of the isobutylene to the corresponding alcohol.
Claim 2
Dependent Claim
81 words
An improved process for hydrating, with liquid water over a solid catalyst and with a liquid solvent, isobutylene to form tertiary butyl alcohol in the liquid state, wherein the improvement comprises using a solvent selected from the group consisting of glycols, glycol ethers, and glycol diethers, and maintaining a solvent-to-water weight ratio of from about 5:1 to about 20:1, thus maintaining a single liquid phase for the reaction mixture and increasing the conversion percentage of the isobutylene to the corresponding alcohol.
Claim 3
Dependent Claim
34 words
The process of claim 1 wherein said maintaining step is conducted at a pressure of between about 300 psia and 3000 psia and at a temperature of between about 80° C and 150° C.
Claim 4
Dependent Claim
65 words
The process of claim (4) 2, wherein said lycols are selected from the group consisting of dipropylene glycol and propylene glycol, said glycol ethers are selected from the group consisting of methyl cellosolve, butyl cellosolve, monomethyl ether of diethylene glycol, and monomethyl ether of propylene glycol, and said glycol diethers are selected from the group consisting of the diethyl and dimethyl ethers of diethylene glycol.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein said solid catalyst is a sulfonic acid resin.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein said water and said iso-olefin have water to iso-olefin mole ratio of from about 3 to about 30.
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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |