JPS574955A - Reducing method of benzenediazonium sulfate - Google Patents

Reducing method of benzenediazonium sulfate

Info

Publication number
JPS574955A
JPS574955A JP7853280A JP7853280A JPS574955A JP S574955 A JPS574955 A JP S574955A JP 7853280 A JP7853280 A JP 7853280A JP 7853280 A JP7853280 A JP 7853280A JP S574955 A JPS574955 A JP S574955A
Authority
JP
Japan
Prior art keywords
phenylhydrazine
reducing
benzenediazonium sulfate
ammonium
benzenediazonium
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
JP7853280A
Other languages
Japanese (ja)
Other versions
JPS599544B2 (en
Inventor
Shigeo Wake
Satoshi Taguchi
Yoshihide Mori
Michiichi Sano
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.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical 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 Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to JP7853280A priority Critical patent/JPS599544B2/en
Publication of JPS574955A publication Critical patent/JPS574955A/en
Publication of JPS599544B2 publication Critical patent/JPS599544B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain phenylhydrazine useful as an intermediate for medicine, dye, etc. in high yield, by reducing benzenediazonium sulfate with ammonium sulfite and ammonium hydrogensulfite as reducing agents under specific conditions.
CONSTITUTION: Benzenediazonium sulfate is reduced with ammonium sulfite and ammonium hydrogensulfite as reducing agents in an aqueous medium at pH 5.2W 7.0 under a pressure of the saturated vapor pressure of the reaction mixture to 10kg/cm2.gauge to give an acid salt of phenylhydrazine. The resultant compound is then reacted with a base and converted into phenylhydrazine. The reducing raction is preferably carried out at 30W50°C for 30min or longer in the initial period of the reaction and then at 80W100°C. The starting material benzenediazonium sulfate can be obtained by diazotizing aniline with nitrous acid, etc. in an aqueous solution of sulfuric acid.
COPYRIGHT: (C)1982,JPO&Japio
JP7853280A 1980-06-10 1980-06-10 Method for reducing benzenediazonium sulfate Expired JPS599544B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7853280A JPS599544B2 (en) 1980-06-10 1980-06-10 Method for reducing benzenediazonium sulfate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7853280A JPS599544B2 (en) 1980-06-10 1980-06-10 Method for reducing benzenediazonium sulfate

Publications (2)

Publication Number Publication Date
JPS574955A true JPS574955A (en) 1982-01-11
JPS599544B2 JPS599544B2 (en) 1984-03-03

Family

ID=13664514

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7853280A Expired JPS599544B2 (en) 1980-06-10 1980-06-10 Method for reducing benzenediazonium sulfate

Country Status (1)

Country Link
JP (1) JPS599544B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0424591A (en) * 1990-05-18 1992-01-28 Oki Electric Ind Co Ltd Medium detection device
JP2001233841A (en) * 2000-02-21 2001-08-28 Sumitomo Chem Co Ltd Method for producing phenylhydrazines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0424591A (en) * 1990-05-18 1992-01-28 Oki Electric Ind Co Ltd Medium detection device
JP2001233841A (en) * 2000-02-21 2001-08-28 Sumitomo Chem Co Ltd Method for producing phenylhydrazines

Also Published As

Publication number Publication date
JPS599544B2 (en) 1984-03-03

Similar Documents

Publication Publication Date Title
JPS574955A (en) Reducing method of benzenediazonium sulfate
JPS561888A (en) Preparation of concentrated aqueous solution of acrylamide with microorganism
JPS57126453A (en) Production of acetoacetic anilide
JPS5525460A (en) Preparation of red dye
JPS5352274A (en) Treating method for aqueous solution containing urea, ammonia and carbondioxide
JPS55104247A (en) Improved preparation of azo compound
SU940648A3 (en) Process for producing 4-amino-5-chloro-1-phenylpyrid-azone-(6)
JPS57155996A (en) Preparation of l-threonine
JPS5476544A (en) Preparation of p-cyanophenol
JPS5571609A (en) Obtaining method for high purity crystal of hydroxylamine sulfate from reaction solution by sulfite process
JPS5236622A (en) Process for preparation of bromoacetic acid
JPS5334703A (en) Preparation of methyl bromide from hydrobromic acid
JPS5441830A (en) Production of p-hydroxybenzaldehyde
JPS5512150A (en) Preparation of tartrazine
JPS574957A (en) Preparation of phenylhydrazine
JPS5257129A (en) Process for hydroquinone
JPS5271411A (en) Continuous preparation of methacrylic amide sulfate
JPS5331616A (en) Preparation of glycine
JPS5212127A (en) Process for recovery of methylmethacrylate
SU1047903A1 (en) 2,2,7,7-tetramethyl-5-oxohexahydro-1,4-diazepin-1-oxyl
JPS52108908A (en) Preparation of n-substituted thiolcarbamates
JPS5231017A (en) Quaternizing process
JPS5711971A (en) Preparation of pyrazinamide
JPS55127360A (en) Preparation of cystamine sulfate
JPS5259130A (en) Process for preparation of nitro-substituted benzoic amides