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JPS5770859A - Optical resolution of dl-cysteine - Google Patents

Optical resolution of dl-cysteine

Info

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
Application number
JP14630080A
Other languages
Japanese (ja)
Other versions
JPS6055063B2 (en
Inventor
Osami Inoue
Yoshiko Kurima
Soyao Moriguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Denko KK filed Critical Showa Denko KK
Priority to JP14630080A priority Critical patent/JPS6055063B2/en
Publication of JPS5770859A publication Critical patent/JPS5770859A/en
Publication of JPS6055063B2 publication Critical patent/JPS6055063B2/en
Expired legal-status Critical Current

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
JP14630080A 1980-10-21 1980-10-21 Optical separation method of DL-cysteine Expired JPS6055063B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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