Patent EP0140022A1 successfully refreshed from Google Patents.
US4284831A
Expired / Lapsed
US
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Process for the production of tertiary alcohols
Assignee: Tonen General Sekiyu KK
•
Filing: 1980-05-05
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Granted: 1981-08-18
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Expires: 2000-05-05
Abstract
Abstract Tertiary alcohols are produced by the hydration of an isoolefin in the presence as catalyst of an acidic cation exchange resin such as a sulfonated styrene-divinylbenzene copolymer and in the presence of an oxy acid or lactone thereof such as γ-valerolactone. The process is useful for separating isobutylene from a hydrocarbon mixture containing its isomers via preparation of the alcohol, separation from the unreacted hydrocarbons and dehydration of the tertiary butyl alcohol to isobutylene.
Inventors
- 👤 Yoshiharu Okumura
- 👤 Katsumi Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:59
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/03; C07C29/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
64 words
In a process for the production of tertiary alcohols by causing an isoolefin or a hydrocarbon mixture containing an isoolefin to react with water in the presence of an acidic cation exchange resin, the improvement which comprises carrying out the reaction in the presence of an oxy acid ester selected from the group consisting of glycolic acid methyl ester and glycolic acid ethyl ester.
Claim 2
Dependent Claim
64 words
In a process for the production of tertiary alcohols by causing an isoolefin or a hydrocarbon mixture containing an isoolefin to react with water in the presence of an acidic cation exchange resin, the improvement which comprises carrying out the reaction in the presence of an oxy acid ester selected from the group consisting of glycolic acid methyl ester and glycolic acid ethyl ester.
Claim 3
Dependent Claim
65 words
In a process for the production of tertiary alcohols by causing an isoolefin or a hydrocarbon mixture containing an isoolefin to react with water in the presence of an acidic cation exchange resin, the improvement which comprises carrying out the reaction in the presence of a C 2 to C 5 oxy acid or the lactones, lactides, methyl or ethyl esters thereof, or mixtures thereof.
Claim 4
Dependent Claim
65 words
In a process for the production of tertiary alcohols by causing an isoolefin or a hydrocarbon mixture containing an isoolefin to react with water in the presence of an acidic cation exchange resin, the improvement which comprises carrying out the reaction in the presence of a C 2 to C 5 oxy acid or the lactones, lactides, methyl or ethyl esters thereof, or mixtures thereof.
Claim 5
Dependent Claim
69 words
In a process for the production of tertiary alcohols by causing an isoolefin or a hydrocarbon mixture containing an isoolefin to react with water in the presence of an acidic cation exchange resin, the improvement which comprises carrying out the reaction in the presence of an oxy acid selected from the group consisting of oxyacetic acid, lactic acid, 3-oxypropionic acid, β, β, β-trichlorolactic acid, oxypivalic acid and γ-oxybutyric acid.
Claim 6
Dependent Claim
69 words
In a process for the production of tertiary alcohols by causing an isoolefin or a hydrocarbon mixture containing an isoolefin to react with water in the presence of an acidic cation exchange resin, the improvement which comprises carrying out the reaction in the presence of an oxy acid selected from the group consisting of oxyacetic acid, lactic acid, 3-oxypropionic acid, β, β, β-trichlorolactic acid, oxypivalic acid and γ-oxybutyric acid.
Claim 7
Dependent Claim
59 words
In a process for the production of tertiary alcohols by causing an isoolefin or a hydrocarbon mixture containing an isoolefin to react with water in the presence of an acidic cation exchange resin, the improvement which comprises carrying out the reaction in the presence of a lactone selected from the group consisting of β-propiolactone, β,β-dimethylpropiolactone, γ-butyrolactone, γ-valerolactone and γ-valerolactone.
Claim 8
Dependent Claim
59 words
In a process for the production of tertiary alcohols by causing an isoolefin or a hydrocarbon mixture containing an isoolefin to react with water in the presence of an acidic cation exchange resin, the improvement which comprises carrying out the reaction in the presence of a lactone selected from the group consisting of β-propiolactone, β,β-dimethylpropiolactone, γ-butyrolactone, γ-valerolactone and γ-valerolactone.
Claim 9
Dependent Claim
56 words
In a process for the production of tertiary alcohols by causing an isoolefin or a hydrocarbon mixture containing an isoolefin to react with water in the presence of an acidic cation exchange resin, the improvement which comprises carrying out the reaction in the presence of a lactide selected from the group consisting of diglycolide and lactide.
Claim 10
Dependent Claim
56 words
In a process for the production of tertiary alcohols by causing an isoolefin or a hydrocarbon mixture containing an isoolefin to react with water in the presence of an acidic cation exchange resin, the improvement which comprises carrying out the reaction in the presence of a lactide selected from the group consisting of diglycolide and lactide.
Claim 11
Dependent Claim
25 words
The process as set forth in claims 3, 4 or 5 in which the hydrocarbon mixture comprises predominantly C 4 hydrocarbons including isomers of isobutylene.
Claim 12
Dependent Claim
20 words
The process as set forth in claims 3, 4 or 5 in which the resin used is a sulfonated resin.
Claim 13
Dependent Claim
21 words
The process as set forth in claims 3, 4 or 5 in which the resin used is a sulfonated styrene-divinylbenzene copolymer.
Claim 14
Dependent Claim
25 words
The process as set forth in claims 3, 4 or 5 in which the feeds contains isobutylene and tertiary butyl alcohol is recovered as product.
Claim 15
Dependent Claim
43 words
The process as set forth in claims 3, 4 or 5 in which the feed comprises isobutylene in a hydrocarbon mixture, the resin used is a sulfonated styrene-divinylbenzene copolymer and tertiary butyl alcohol produced by hydration is recovered in a substantially purified form.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |