JPS5770859A - Optical resolution of dl-cysteine - Google Patents
Optical resolution of dl-cysteineInfo
- Publication number
- JPS5770859A JPS5770859A JP14630080A JP14630080A JPS5770859A JP S5770859 A JPS5770859 A JP S5770859A JP 14630080 A JP14630080 A JP 14630080A JP 14630080 A JP14630080 A JP 14630080A JP S5770859 A JPS5770859 A JP S5770859A
- Authority
- JP
- Japan
- Prior art keywords
- crystal
- seed crystal
- hydrochloride hydrate
- optically active
- cysteine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To separate and to obtain preferentially and selectively the same kind of an optically active substance as seed crystal, by adding crystal of hydrochloride hydrate of an optically active cysteine as seed crystal to an aqueous solution of DL-systeine converted into a hydrochloride hydrate in a saturated or supersaturated state.
CONSTITUTION: DL-Cystein is converted into a hydrochloride hydrate to give its aqueous solution, crystal (preferably having a crystal concentration of ≤30wt% and a particle size of ≥20 mesh for uniform stirring) of a hydrochloride hydrate of an optically active cysteine as seed crystal is added to the aqueous solution in the saturated or supersaturated state of the solution, or in the state of the supersaturated state (in order to give high-purity substance, the suppression to a low degree of supersaturation is important) one hydrochloride hydrate of D-or L- cysteine which exists in excess is crystallized, and the crystal as seed crystal added to the solution or the crystallized crystal is used as seed crystal. An optically active substance similar to the seed crystal is preferentially crystallized and separated from the mother liquor.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14630080A JPS6055063B2 (en) | 1980-10-21 | 1980-10-21 | Optical separation method of DL-cysteine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14630080A JPS6055063B2 (en) | 1980-10-21 | 1980-10-21 | Optical separation method of DL-cysteine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5770859A true JPS5770859A (en) | 1982-05-01 |
JPS6055063B2 JPS6055063B2 (en) | 1985-12-03 |
Family
ID=15404555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14630080A Expired JPS6055063B2 (en) | 1980-10-21 | 1980-10-21 | Optical separation method of DL-cysteine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6055063B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4569066A (en) * | 1982-08-14 | 1986-02-04 | Laurel Bank Machine Co., Ltd. | Paper sheet counting machine |
-
1980
- 1980-10-21 JP JP14630080A patent/JPS6055063B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4569066A (en) * | 1982-08-14 | 1986-02-04 | Laurel Bank Machine Co., Ltd. | Paper sheet counting machine |
Also Published As
Publication number | Publication date |
---|---|
JPS6055063B2 (en) | 1985-12-03 |
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