Preparation method of rubber plasticizer tricresyl phosphate

Abstract

The invention discloses a preparation method of a rubber plasticizer tricresyl phosphate. The method includes the following steps: 1, adding mixed cresol and TiSiW12O40 / TiO2 in a three-neck flask, heating withle stirring to 60 DEG C, dropwise adding phosphorus oxychloride within 1 h, heating to 100 DEG C, and reacting for 8 h; and 2, filtering out the catalyst, and conducting reduced pressure distillation to obtain a fraction of tricresyl phosphate. According to the preparation method of the rubber plasticizer tricresyl phosphate provided by the invention, supported heteropoly acid is used to substitute Lewis acid for synthesis of tricresyl phosphate; and the catalyst has the advantages of stabilization simple post-treatment for the reaction, recyclability, green and environment-friendliness.

Description

[0001] technical field [0002] The invention relates to a method for preparing a rubber plasticizer, in particular to a method for preparing tricresyl phosphate. [0003] Background technique [0004] Tricresyl phosphate is a standard flame retardant plasticizer for synthetic rubber, polyester, and polyvinyl chloride. It can endow high polymers with good wear resistance, weather resistance, mildew resistance, radiation resistance, and electrical properties. It can also be used Used as gasoline additive, lubricating oil additive and hydraulic oil. Tricresyl phosphate is produced by one-step reaction of phosphorus oxychloride and mixed cresols. The synthesis process is simple, but the choice of catalyst is very important to the whole reaction. At present, Lewis acid is used as catalyst in the production process, but these catalysts are unstable in themselves, It is easy to decompose in the medium, the post-reaction treatment is troublesome, the separation is difficult, the ...

AI Technical Summary

Problems solved by technology

Tricresyl phosphate is produced by one-step reaction of phosphorus oxychloride and mixed cresols. The synthesis process is simple, but the choice of catalyst is very important to the whole reaction. At present, Lewis acid is used as catalyst in the production process, but these catalysts are unstable in themselves, It is easy to decompose in the medium, the post-reaction treatment is troublesome, the separation is difficult, the catalyst cannot be recycled and reused, and the environment is polluted