A kind of production method of diaminodiphenyl ether

Abstract

The invention discloses an energy-efficient and environment-friendly novel diaminodiphenyl ether production line. The production line comprises three parts including main material adding, production flow and product production and four links including condensation reaction, reduction reaction, refined purification and crushing and packaging. The production line is characterized in that a solvent and a catalyst which are low in toxicity, efficient and reusable and the sealed flow without air and impurities are used to prepare 4, 4'-diaminodiphenyl ether with the purity being not lower than 99.9%. Compared with the prior art, the production line is simple in structure, few in reaction links, low in time consumption, high in efficiency, high in solvent and catalyst repeated reaction rate, low in pollution discharge, low in toxicity, capable of saving energy, environmentally friendly, safe, low in cost, and the like.

Description

1. Technical field [0001] The invention relates to the production of chemical raw materials, in particular to a novel diaminodiphenyl ether production line with high efficiency, energy saving and environmental protection. 2. Background technology [0002] As raw materials, additives, intermediates and crosslinking agents, diaminodiphenyl ether is more powerful and special for the production of electromechanical, electronics, plastics, resins, dyes, spices and other industries and products with special functions and properties, as well as research and development. All new products have and occupy a special and irreplaceable important position and role. Whether the above-mentioned purpose can be realized and achieved depends on whether high-purity fine products can be produced. The general flow process of prior art production diaminodiphenyl ether is: 1, condensation reaction Sodium p-nitrophenolate, p-nitrochlorobenzene, dimethylacetamide, sodium bisulfite, potassium chlorid...

AI Technical Summary

Problems solved by technology

The problems in the above production process are: 1. There are many production links, long node maintenance and interval time, and low efficiency; 2. The condensation reaction, reduction reaction and refining and purification process are complicated, difficult to control, and high technical requirements

3. The process of heating up, cooling down, and constant temperature takes a long time, with many repetitions and large energy consumption

4. The intermediate products and crude products have many washing times, large water consumption, and a lot of product sewage, and the burden of subsequent water treatment is heavy; solid waste of iron oxide sludge is generated, which seriously pollutes the environment

5. There are many nodes in the open reaction and processing process, the volatile gas overflow is serious, and the atmospheric environment is polluted

6. The sublimation process has high technical requirements, high risks and many safety factors

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