A kind of chlorinated aromatic compound (r 1 -x m ) dechlorination method

Abstract

Provided is a dechlorination method of a chloro-substituted aromatic compound (R 1-X m) using copper as a catalyst, comprising using R 1-X m as a substrate, adding R 2(OH) n, an alkaline substance with a pH value greater than 7, and a copper catalyst to form a mixture, in which R 1 is a substituted or unsubstituted aromatic group, X is a chloride ion, m is a positive integer, R 2 is methyl, and n is 1; stirring the mixture; and heating the mixture to perform a hydrogenation reaction to obtain R 1-X m', in which m' is less than m, and m' is an integer.

Description

technical field [0001] The present invention relates to a kind of chlorinated aromatic compound (R 1 -X m ) dechlorination method. Background technique [0002] The chemical properties of polychlorobenzene compounds and their derivatives are stable, and they are easy to accumulate in organisms. Once it enters the environment, it will pose a long-term threat to human beings and the ecological environment. It has been listed as one of the pollutants that are prioritized for global environmental control. However, polychlorobenzene by-products, including trichlorobenzene and tetrachlorobenzene, are unavoidably generated in current industrial production. The annual output of polychlorobenzene by-products is more than 10,000 tons, which not only pollutes the environment but also takes up space, coupled with high processing costs, it becomes a great burden in industrial production. [0003] Low-chlorine aromatics are chemical raw materials, organic synthesis intermediates and o...

AI Technical Summary

Problems solved by technology

Does not produce chlorinated intermediates, or generates very small amounts of chlorinated intermediates, greatly reducing the added value of the product

At the same time, the use of precious metals as catalysts also increases the processing cost

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