JPS5612363A - Purification of aromatic sulfinic acid - Google Patents

Purification of aromatic sulfinic acid

Info

Publication number
JPS5612363A
JPS5612363A JP8707879A JP8707879A JPS5612363A JP S5612363 A JPS5612363 A JP S5612363A JP 8707879 A JP8707879 A JP 8707879A JP 8707879 A JP8707879 A JP 8707879A JP S5612363 A JPS5612363 A JP S5612363A
Authority
JP
Japan
Prior art keywords
sulfinic acid
acid
aromatic
dichloroethane
dichloromethane
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.)
Pending
Application number
JP8707879A
Other languages
Japanese (ja)
Inventor
Masao Ogawa
Haruomi Honda
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.)
Takeda Pharmaceutical Co Ltd
Original Assignee
Takeda Chemical Industries Ltd
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 Takeda Chemical Industries Ltd filed Critical Takeda Chemical Industries Ltd
Priority to JP8707879A priority Critical patent/JPS5612363A/en
Publication of JPS5612363A publication Critical patent/JPS5612363A/en
Pending legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To purify the high-purity titled compound selectively and efficiently, by extracting an aqueous solution aromatic sulfinic acid containing with dichloromethane, chloroform, or 1,2-dichloroethane and removing by products.
CONSTITUTION: An aqueous solution containing an aromatic sulfinic acid or its salt is converted by a mineral acid into a free sulfinic acid, which is extracted with dichloromethane, chloroform, 1,2-dichloroethane, or their mixture as a solvent to separate only sulfinic acid by extraction. The titled compound with extremely small content of impurities, e.g., an inorganic acid, inorganic salt, side reaction product (e.g., aromatic sulfonic acid, etc.) is separated efficiently through extraction and can be purified in high purity by a conventional method.
COPYRIGHT: (C)1981,JPO&Japio
JP8707879A 1979-07-09 1979-07-09 Purification of aromatic sulfinic acid Pending JPS5612363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8707879A JPS5612363A (en) 1979-07-09 1979-07-09 Purification of aromatic sulfinic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8707879A JPS5612363A (en) 1979-07-09 1979-07-09 Purification of aromatic sulfinic acid

Publications (1)

Publication Number Publication Date
JPS5612363A true JPS5612363A (en) 1981-02-06

Family

ID=13904902

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8707879A Pending JPS5612363A (en) 1979-07-09 1979-07-09 Purification of aromatic sulfinic acid

Country Status (1)

Country Link
JP (1) JPS5612363A (en)

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