Method and device for continuously producing m-aminophenol

Abstract

A method for continuously producing m-aminophenol is implemented to produce the m-aminophenol through alkali fusion continuous reaction and specifically includes the production steps of preparing materials, wherein a sodium m-sulfamate solution and a strong base are sequentially added into a material preparing tank according to a certain ratio, and stirring and heating are conducted; conducting heating reaction, wherein the materials in the material preparing tank are continuously discharged into a heating spiral pipeline reactor, and heating reaction is conducted for a certain period of time; conducting heat preserving, wherein the materials are pushed into the heating spiral pipeline reactor through the heating spiral pipeline reactor, and heat preserving is conducted at 280-310 DEG C for a certain period of time; conducting diluting, wherein qualifiedly-diluted materials at the bottom of an impregnation and dilution tank are transferred to the subsequent process section for subsequent processing to obtain a crude m-aminophenol product. Continuous feeding, heating, heat preserving and continuous discharging are realized, the continuity of alkali fusion and the precision of temperature control in the production process of the m-aminophenol are realized, the operation intensity of alkali fusion is relieved, the requirement for the operation level of workers is lowered, and production efficiency is improved.

Description

technical field

[0001] The invention relates to a method and device for continuous production of m-aminophenol, belonging to the technical field of chemical production. Background technique

[0002] m-Aminophenol is an important organic intermediate with a wide range of uses. It can be used as a catalyst in medicine, dye industry and organic chemical reactions, as a metal anti-corrosion agent in alkaline media, and can also be used in the production of antioxidants, stabilizers, and developers. Wait.

[0003] The traditional production method of m-aminophenol is nitrobenzene sulfonation alkali fusion method. With the advancement of science and technology, through the continuous exploration and efforts of domestic and foreign scientific and technological personnel, a variety of synthetic routes have been developed, such as sodium m-sulfamate alkali fusion method, m-nitrophenol electrolysis method, m-phenylenediamine hydrolysis method, Resorcinol ammoniation method, aniline ...

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