JPS5585554A - Preparation of 2,2-dichlorohydrazobenzene - Google Patents

Preparation of 2,2-dichlorohydrazobenzene

Info

Publication number
JPS5585554A
JPS5585554A JP15815978A JP15815978A JPS5585554A JP S5585554 A JPS5585554 A JP S5585554A JP 15815978 A JP15815978 A JP 15815978A JP 15815978 A JP15815978 A JP 15815978A JP S5585554 A JPS5585554 A JP S5585554A
Authority
JP
Japan
Prior art keywords
caustic alkali
catalyst
nitrochlorobenzene
give
dichlorohydrazobenzene
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
JP15815978A
Other languages
Japanese (ja)
Other versions
JPS6227066B2 (en
Inventor
Teruyuki Nagata
Kosuke Yamamoto
Akihiro Tamaoki
Katsuji Watanabe
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP15815978A priority Critical patent/JPS5585554A/en
Publication of JPS5585554A publication Critical patent/JPS5585554A/en
Publication of JPS6227066B2 publication Critical patent/JPS6227066B2/ja
Granted 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

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

Abstract

PURPOSE: To prepare 2,2'-dichlorohydrazobenzene useful as a raw material of dyes, in a high yield, by two-stage catalytic hydrogenation of o-nitrochlorobenzene in the presence of a catalyst and a caustic alkali of a specific concentration.
CONSTITUTION: o-Nitrochlorobenzene I is reduced with molecular hydrogen in the presence of a Pd- or Pt-containing catalyst and a 3NW15N aqueous caustic alkali solution to give the intermediate II. The reaction is carried out if desired in the presence of a naphthoquinone compound as a co-catalyst and an organic solvent, e.g. benzene, etc. When most of the compound I was reacted, a part or the whole of the water layer is removed and thereafter the concentration of the caustic alkali is adjusted between 0.5N and 3N. The catalytic hydrogenation is further continued to give the desired compound III.
COPYRIGHT: (C)1980,JPO&Japio
JP15815978A 1978-12-23 1978-12-23 Preparation of 2,2-dichlorohydrazobenzene Granted JPS5585554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15815978A JPS5585554A (en) 1978-12-23 1978-12-23 Preparation of 2,2-dichlorohydrazobenzene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15815978A JPS5585554A (en) 1978-12-23 1978-12-23 Preparation of 2,2-dichlorohydrazobenzene

Publications (2)

Publication Number Publication Date
JPS5585554A true JPS5585554A (en) 1980-06-27
JPS6227066B2 JPS6227066B2 (en) 1987-06-12

Family

ID=15665551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15815978A Granted JPS5585554A (en) 1978-12-23 1978-12-23 Preparation of 2,2-dichlorohydrazobenzene

Country Status (1)

Country Link
JP (1) JPS5585554A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156724A (en) * 1962-10-25 1964-11-10 Sterling Drug Inc Preparation of 2, 2'-dichlorohydrazobenzene
JPS4828433A (en) * 1971-08-14 1973-04-14

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156724A (en) * 1962-10-25 1964-11-10 Sterling Drug Inc Preparation of 2, 2'-dichlorohydrazobenzene
JPS4828433A (en) * 1971-08-14 1973-04-14

Also Published As

Publication number Publication date
JPS6227066B2 (en) 1987-06-12

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