Title:
【発明の名称】4‐アミノフエノール製造用の改良水素化方法
Document Type and Number:
Japanese Patent JP2591786
Kind Code:
B2
Abstract:
The process for the production of 4-aminophenol by reducing nitrobenzene with hydrogen in a reaction zone at an elevated temperature and moderate pressure in the presence of aqueous sulfuric acid, a surfactant and a catalyst, is improved by using a platinum on carbon catalyst; utilizing a reaction zone which is not completely filled so that there is both a vapor space and a lower liquid space in the reaction zone and introducing the hydrogen into the vapor space part of said reaction zone; stirring the reaction mixture vigorously using an impeller placed at 40-60% of liquid depth to attain a rate of hydrogenation resulting in a performance index [expressed as grams 4-aminophenol produced per minute per liter of reaction volume] of 0.2 and higher.
Inventors:
JEIMUZU TSU FUEN KAO
DOWAITO EBERETSUTO RAFU ZA SEKANDO
DOWAITO EBERETSUTO RAFU ZA SEKANDO
Application Number:
JP9841488A
Publication Date:
March 19, 1997
Filing Date:
April 22, 1988
Export Citation:
Assignee:
NORANKO INC
International Classes:
B01J23/42; C07C67/00; C07C213/00; C07C213/02; C07B61/00; C07C213/08; C07C215/76; (IPC1-7): C07C215/76; C07C213/00
Attorney, Agent or Firm:
Heiyoshi Odashima