Equipment and process for preparing 4,4'-bis(dimethylamino)diphenylcarbinol through catalytic oxidation

Abstract

The invention discloses equipment and a process for preparing 4,4'-bis(dimethylamino)diphenylcarbinol through catalytic oxidation, and relates to the technical field of chemical engineering, the equipment comprises a shell, the shell is filled with a catalyst, the shell is connected with a feeding one-way valve, a feeding electromagnetic valve, a safety valve, a temperature sensor, an oxygen one-way valve and an oxygen concentration meter, and a heating belt wraps the shell; the outlet end of the shell is sequentially connected with a condenser, a gas-liquid separator, a reduced pressure distillation device and a cooling crystallizing pond through pipelines, and a temperature controller and a master controller are arranged outside the shell. According to the method, frequent loading and unloading and many repeated operations are avoided, continuous production can be achieved, and long-term stable operation can be achieved. Compared with an intermittent tank reactor, the system is higher in efficiency and better in energy saving performance; the continuous and stable automatic production can be realized by applying an accurate sensing and control system, the conversion rate and the product purity are ensured, a large amount of three wastes cannot be generated, and the device is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to equipment and a process for preparing Mie alcohol by catalytic oxidation. Background technique [0002] Today's chemical industry is more and more developed. For example, Mieter alcohol is an important pharmaceutical and dye intermediate with a wide range of uses. As the main raw material of the dye crystal violet lactone (CVL), Mieter alcohol is in great demand in the market. Usually, Methane Bess (4,4'-bisdimethylaminodiphenylmethane) and oxygen are used as raw materials to prepare Michaelis alcohol through a catalytic oxidation process. [0003] According to the public information, the domestic use of oxidation method to produce Michaelis alcohol, generally adopts batch production of reactor. The reaction was simulated in the laboratory, using a supported multi-element metal oxide catalyst, oxygen was supplied by air bubbling, and the reaction time was 120 minutes ...

AI Technical Summary

Problems solved by technology

However, the batch reaction has many repetitive operations such as frequent loading and unloading, repeated heating and cooling, etc., and the production capacity is restricted.

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