Title:
STABILIZATION OF 4-NITROSODIPHENYLAMINE HYDROCHLORIDE SOLUTION
Document Type and Number:
Japanese Patent JP3463315
Kind Code:
B2
Abstract:
PURPOSE: To suppress the decomposition of 4-nitrosodiphenylamine hydrochloride and relatively stably keep a 4-nitrosodiphenylamine hydrochloride solution for a long period.
CONSTITUTION: Nitrogen monoxide gas is added to the vapor phase on a 4- nitrosodiphenylamine hydrochloride solution at a concentration of ≥10%. 4- Nitrosodiphenylamine hydrochloride is produced by the rearrangement of N- nitrosodiphenylamine with hydrogen chloride or the reaction of diphenylamine with a nitrosation agent (e.g. nitrosyl chloride or alkyl nitrite) and hydrogen chloride at the same time. The compound is present in the solvent used in the above production process in the form of a slurry of 10-40wt.% concentration.
Inventors:
Yasumi Katayama
Tetsuo Murata
Tetsuo Murata
Application Number:
JP11982993A
Publication Date:
November 05, 2003
Filing Date:
May 21, 1993
Export Citation:
Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
C07C209/90; C07C211/56; (IPC1-7): C07C211/56; C07C209/90
Domestic Patent References:
| JP5444622A | ||||
| JP5459236A | ||||
| JP5982349A | ||||
| JP5982350A | ||||
| JP48103553A | ||||
| JP5640654A | ||||
| JP543019A | ||||
| JP23631A | ||||
| JP5377025A |
Attorney, Agent or Firm:
Takashi Kuboyama
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