Industrial synthesis method of tris(butoxyethyl)phosphate and device thereof

Abstract

The invention relates to an industrial synthesis method of tris(butoxyethyl)phosphate (TBEP) and a device thereof. Specifically, the method consists of: in the presence of a water absorbent and a catalyst, reacting ethylene glycol monobutyl ether with phosphorus oxychloride to generate a TBEP crude product, letting the TBEP crude product enter a washing tower to conduct multistage countercurrent extraction washing, then bringing the crude product into a stratification pot to conduct standing stratification, removing a saponification and aqueous layer from an upper material layer, then subjecting the obtained material layer to a distillation kettle, carrying out reduced pressure water vapor dealcoholization, introducing water vapor to the kettle bottom, conducting water vapor distillation for 0.9-1.2h, removing residual ethylene glycol monobutyl ether, and then carrying out reduced pressure dehydration and filtering to obtain a TBEP finished product. The product obtained by the method has low sodium ion content, and the tris(butoxyethyl)phosphate purity is high, the method reduces the probability of tris(butoxyethyl)phosphate degradation or loss, improves the yield, also reduces the environmental pressure, and can lower the content of sodium ions in the product without harsh distillation conditions, thereby greatly reducing the production cost, improving product quality, and increasing the economic benefits of enterprises.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to an industrial synthesis method of tri(butoxyethyl) phosphate and a device thereof. Background technique [0002] Tris(butoxyethyl)phosphate (abbreviated as TBEP) is a flame retardant plasticizer, which is a colorless and transparent liquid with the molecular formula C 18 h 39 PO 7 , it is mainly used for flame retardancy and plasticization of polyurethane resin rubber, cellulose, polyvinyl alcohol, etc., and its molecular structure is: [0003] . [0004] The current synthesis methods are mainly: ① acid-binding method, FMC’s patents US3020303 and EP0091426 describe the production process of tris (alkoxyalkyl) phosphate, the production process adopts the reaction of alkoxy alkyl alcohol and alkali metal oxide, And through the dehydration reaction, the alkali metal alkoxide is reacted with phosphorus oxychloride to generate the product of tri(alkoxyalky...

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Problems solved by technology

[0007] 2) The process yield of products on the existing market is generally 87-89%, and about 10% of the organic by-products f

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