Process for the production of an aminophenol

Details Process for the production of an aminophenol Process for the production of an aminophenol

1985-06-18

1986-04-29

Warren, Charles F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564439, C07C 8506

Patent

active

045858969

ABSTRACT:
In a process for the production of an aminophenol which comprises reacting a divalent phenol and ammonia in the absence of a catalyst or in the presence of a water-soluble catalyst, then separating the reaction mixture after the reaction to recover a separated and recovered product containing an aminophenol and the unreacted divalent phenol, and separating and purifying the aminophenol from said separated and recovered product, the process for the production of an aminophenol which is characterized by, on separating and purifying said aminophenol, contacting said separated and recovered product with an aliphatic ether substantially incompatible with said aminophenol in an inert gas atmosphere at a temperature at which said separated and recovered product melts or higher, then cooling to induce the crystallization of the aminophenol, thereafter filtering and recovering to obtain a cake mainly composed of said aminophenol, further melting and contacting this cake with an aliphatic ether in an inert gas atmosphere in the co-presence of water and a surfactant, and then cooling to induce the crystallization of said aminophenol and recovering it. According to the invention, a high-quality aminophenol can be produced.

REFERENCES:
patent: 2029642 (1933-06-01), Semon
patent: 2559896 (1947-08-01), Patterson et al.
patent: 3845129 (1974-10-01), Reid
patent: 4478849 (1984-10-01), Ainsworth et al.

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