Method for preparing triphenylphosphine

Abstract

The invention relates to a method for preparing triphenylphosphine. Phosphorus trichloride, sublimed sulfur and benzene are used as reactants to react to obtain triphenylphosphine sulfide under the condition of a catalyst, and the triphenylphosphine sulfide is reduced to obtain the triphenylphosphine under the existence of a reducing agent existing. The method for preparing the triphenylphosphine has the advantages of simple process flow and low cost and is suitable for industrial production, and reaction is easily controlled.

Description

technical field

[0001] The invention belongs to the field of preparation of triphenylphosphine, and mainly relates to a preparation method of triphenylphosphine. Background technique

[0002] Triphenylphosphine is the basic raw material of rhodium-phosphine complex catalyst, and has wide application in domestic petrochemical industry. At present, the sodium method is mainly used for the preparation of triphenylphosphine, and there are two main process routes. One is a step-by-step synthesis method, which is to first react chlorobenzene with metal sodium to produce phenyl sodium at 20-30 ° C, and then Add phosphorus trichloride and phenyl sodium to react to prepare triphenylphosphine. This method has complex reaction steps, long reaction process, many side reactions and low product yield. Another kind of method is the disclosed method of German patent Ger.offen1618116, and it is to drip chlorobenzene and phosphorus trichloride and metal sodium to react simultaneously at 50-6...

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