Process for preparing high-purity butoxy ethyl phosphate

Abstract

The production method of high-purity butoxy triethyl phosphate belongs to a production method of chemical products, and is characterized in that: (1) ingredients: the reaction consisting of 1 part of phosphorus oxychloride and 3 to 10 parts of butoxyethanol The material is ready to be dropped into the reactor during synthesis; (2) synthesis: the reactant is dropped into a jacketed reactor, cooling water is passed through the jacket, and the reactant reacts in the reactor; (3 ) reflux: after synthesis, heat the temperature of the reactants in the reactor to 50°C to 90°C, and evaporate part of the reactants and products into the condenser above the reactor, and the HCl in the products is pumped out under reduced pressure. drop, the remaining condensed and fall into the reactor to participate in the reaction again; (4) recovery: after the reflux ends, recover the excess alcohol in the reactant under negative pressure; (5) neutralization: after recovering the excess alcohol , neutralize the crude product with NaOH or Na2CO3 aqueous solution. The invention can effectively improve the purity and yield of products; reduce production cost and energy consumption; and reduce pollution.

Description

technical field [0001] The invention relates to a production method of chemical products, in particular to a production method of phosphate ester products. Background technique [0002] With the rapid development of the chemical industry, the use of phosphate esters is becoming more and more extensive, and the requirements are getting higher and higher. Take triethyl phosphate as an example. It is a good flame retardant. Abroad, it has been widely used to replace chlorine-containing flame retardants, and the consumption is increasing at the level of thousands of tons per year. However, it has several disadvantages: low production yield, narrow use, hydrolysis when it meets water, many water-containing products cannot use it as a flame retardant, and so on. This requires whether people can develop a new material, which has no disadvantages of triethyl phosphate, has the advantages of triethyl phosphate, and has other functions. After a long period of research and experiment...

AI Technical Summary

Problems solved by technology

However, it has several disadvantages: low production yield, narrow use, hydrolysis when it meets water, many water-containing products cannot use it as a flame retardant, etc.

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