4,4-dinitrodiphenyl ethers synthesis method

Abstract

The present invention discloses the synthesis of 4, 4'-dinitro diphenyl ether. The basic synthesis route is that under the action of proper catalyst and co-catalyst monobasic alcohol or polyhydric alcohol, the material p-nitrochlorobenzene is synthesized into 4, 4'-dinitro diphenyl ether. The synthesis process has yield up to 95 %, high reaction efficiency caused by the co-catalyst, no explosive side product and no corrosive material, and is suitable for industrial production.

Description

technical field [0001] The present invention relates to a kind of synthetic method of 4,4'-dinitrodiphenyl ether. Background technique [0002] 4,4'-Dinitrodiphenyl ether is an important intermediate in organic synthesis and polymer synthesis. In terms of organic synthesis, it can be used to replace carcinogenic benzidine to produce azo dyes and reactive dyes. Using it as a raw material, direct dyes with different color levels such as scarlet, bright red, sand red, yellow brown, green, gray, blue, bright orange, black, etc. have been developed, which can be used for dyeing silk wool, cotton, linen and other fabrics. Its color fastness and exhaustion rate are superior to benzidine dyes. In terms of polymer synthesis, the main use is to prepare 4,4'-diaminodiphenyl ether, which is a monomer for preparing high-temperature-resistant engineering plastic polyimide. It is also the raw material for the synthesis of 3,3',4,4'-tetraaminodiphenyl ether, which is used to prepare a se...

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Problems solved by technology

The defect that the above-mentioned technology exists is that strong alkali is added in the initial reaction process, which means that the production equipment is greatly restricted. In addition, the drip rate of strong alkali must be controlled in the production process, and the production conditions are harsh, which is not conducive to production, so it is difficult to produce industrially