JPS5524111A - Preparation of dye intermediate - Google Patents

Preparation of dye intermediate

Info

Publication number
JPS5524111A
JPS5524111A JP9624378A JP9624378A JPS5524111A JP S5524111 A JPS5524111 A JP S5524111A JP 9624378 A JP9624378 A JP 9624378A JP 9624378 A JP9624378 A JP 9624378A JP S5524111 A JPS5524111 A JP S5524111A
Authority
JP
Japan
Prior art keywords
nickel
disulfonic acid
salt
dye intermediate
reduced
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
JP9624378A
Other languages
Japanese (ja)
Inventor
Tsuneo Tanaka
Ryuichiro Kurata
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.)
Toyo Ink Mfg Co Ltd
Original Assignee
Toyo Ink Mfg Co 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 Toyo Ink Mfg Co Ltd filed Critical Toyo Ink Mfg Co Ltd
Priority to JP9624378A priority Critical patent/JPS5524111A/en
Publication of JPS5524111A publication Critical patent/JPS5524111A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PURPOSE: To obtain an amino derivative which is a dye intermediate useful for fluorescent brightening agents, by catalytically reducing 4,4'-dinitrostilbene-2,2'- disulfonic acid in the presence of a nickel catalyst in an aqueous solvent.
CONSTITUTION: 4,4'-Dinitostilbene-2,2'-disulfonic acid or its salt is reduced in the presence of a nickel catalyst, e.g. nickel formate, Raney nickel, or reduced nickel in water or an aqueous medium, preferably water, at room temperature to 200°C, preferably 50W120°C, and 2W100kg/cm2 to give 4,4'-diaminostilbene- 2,2'- disulfonic acid or its salt.
EFFECT: Enormous costs for pollution control, e.g. equipment and treatment are unnecessary.
COPYRIGHT: (C)1980,JPO&Japio
JP9624378A 1978-08-09 1978-08-09 Preparation of dye intermediate Pending JPS5524111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9624378A JPS5524111A (en) 1978-08-09 1978-08-09 Preparation of dye intermediate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9624378A JPS5524111A (en) 1978-08-09 1978-08-09 Preparation of dye intermediate

Publications (1)

Publication Number Publication Date
JPS5524111A true JPS5524111A (en) 1980-02-21

Family

ID=14159779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9624378A Pending JPS5524111A (en) 1978-08-09 1978-08-09 Preparation of dye intermediate

Country Status (1)

Country Link
JP (1) JPS5524111A (en)

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