Patent US4092220A successfully refreshed from Google Patents.
US4092220A
Expired / Lapsed
US
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Process for manufacture of L(+)-tartaric acid or salts thereof
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1976-04-16
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Granted: 1978-05-30
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Expires: 1996-04-16
Abstract
Abstract Conversion of cis-epoxysuccinic acid or salts thereof into L(+)-tartaric acid or salts thereof is obtained by the agency of hydrolase.
Inventors
- 👤 Yoshihiro Tsurumi
- 👤 Tomio Fujioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:40
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/367; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/823; Y10S435/843
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
A process for the manufacture of L(+)-tartaric acid or salts thereof, which comprises contacting cis-epoxysuccinic acid or a salt thereof with a substance containing cells of a microorganism belonging to the genus Acetobacter or the genus Corynebacterium having cis-epoxysuccinic acid-hydrolyzing activity, or a treated product thereof, in an aqueous medium, and subsequently collecting the produced L(+)-tartaric acid or salts thereof.
Claim 2
Dependent Claim
60 words
A process for the manufacture of L(+)-tartaric acid or salts thereof, which comprises contacting cis-epoxysuccinic acid or a salt thereof with a substance containing cells of a microorganism belonging to the genus Acetobacter or the genus Corynebacterium having cis-epoxysuccinic acid-hydrolyzing activity, or a treated product thereof, in an aqueous medium, and subsequently collecting the produced L(+)-tartaric acid or salts thereof.
Claim 3
Dependent Claim
54 words
The process according to claim 1, wherein the microorganism belonging to the genus Acetobacter possesses the ability to effect hydrolysis and ring cleavage of the epoxy group of cis-epoxysuccinic acid or salts thereof and is selected from the group consisting of Acetobacter curtus No. 4, Acetobacter curtus No. 10 and Acetobacter curtus No. 21.
Claim 4
Dependent Claim
37 words
The process according to claim 1, wherein the microorganism belonging to the genus Corynebacterium possesses the ability to effect hydrolysis and ring cleavage of the epoxy group of cis-epoxysuccinic acid or salts thereof and is Corynebacterium S-13.
Claim 5
Dependent Claim
50 words
The process according to claim 1, wherein the salt of cis-epoxysuccinic acid is selected from the group consisting of the sodium salts, potassium salts, sodium-potassium salts, calcium salts, sodium-calcium salts, magnesium salts, iron salts, aluminum salts, zinc salts, manganese salts, ammonium salts, sodium-ammonium salts, methylamine salts and triethylamine salts thereof.
Claim 6
Dependent Claim
19 words
The process according to claim 1, wherein said contacting is conducted at a pH of from 4 to 10.
Claim 7
Dependent Claim
20 words
The process according to claim 1, wherein said contacting is conducted at a temperature of not more than 65° C.
Claim 8
Dependent Claim
35 words
The process according to claim 1, wherein the substance containing the microorganism cells is a gel obtained by allowing an acrylic acid amide type monomer to undergo polymerization in a reaction mixture containing said microorganism.
Claim 9
Dependent Claim
18 words
The process according to claim 7, wherein the polymerization is conducted in the presence of a polymerization accelerator.
Claim 10
Dependent Claim
26 words
The process according to claim 7, wherein the polymerization is conducted in the presence of a polymerization is conducted in the presence of a polymerization initiator.
Claim 11
Dependent Claim
14 words
The process according to claim 1, wherein the microorganism belongs to the genus Acetobacter.
Claim 12
Dependent Claim
12 words
The process according to claim 10, wherein said Acetobacter microorganism is catalase-negative.
Claim 13
Dependent Claim
14 words
The process according to claim 1, wherein the microorganism belongs to the genus Corynebacterium.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |