Method for preparing betaine hydrochloride through catalytic hydrolysis reaction

Abstract

The invention discloses a method for preparing betaine hydrochloride through catalytic hydrolysis reaction. The method comprises the following steps: adding betaine ester hydrochloride in a reaction vessel, then adding water and a Ti-SiO2-Al2O3 molecular sieve catalyst, carrying out hydrolysis reaction at a certain temperature, carrying out suction filtration after completing reaction, and drying,thus obtaining the betaine hydrochloride, wherein a mass ratio of the water to the betaine ester hydrochloride is (1 to 2):1, and a molar ratio of Ti to SiO2 to Al2O3 in the Ti-SiO2-Al2O3 molecular sieve catalyst is 1:1:1. According to the method disclosed by the invention, preparation of the betaine hydrochloride is realized through high-efficiency catalytic hydrolysis of the betaine ester hydrochloride, the yield of a product is up to 98 percent or more, the quality is stable, the content of burning residue of the product is lower than 0.1 percent, the catalyst can be recycled, alcohol obtained through hydrolysis can be recycled and reutilized, industrial production can be conveniently carried out, and many problems of large chloroacetic acid consumption, long production period, high burning residue of the product, large emission of three wastes and the like existing in a traditional technology are overcome.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for effective chemical reaction between gamma-butylamine (BAM) or other amines with bicarboxallic acids called betaines that are used as starting materials during synthesis of certain medications like beta blockers. These products have better stability compared to previous methods due to their specific structure. They also contain fewer impurities from older methods. Overall this process helps create higher yields while reducing waste generated through these conventional techniques.

Problems solved by technology

This patented technology describes an improved chemical reaction called betaine hydroxychloridization that has potential uses for producing higher levels of betain hydrochiorides than current methods like sodium or lithocholride processes. However, this technique requires expensive reagents and produces waste material during its manufacturing process due to their poor yielding capacity compared to other techniques currently available at home.

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