Environmental-protection preparation method of betaine hydrochloride

Abstract

The invention belongs to the technical field of fine chemical engineering, in particular to an environmental-protection preparation method of betaine hydrochloride, which is characterized by comprising the following steps: firstly, carrying out neutralization reaction by taking calcium hydroxide or calcium oxide, chloroacetic acid, trimethylamine and sulfuric acid as raw materials to generate calcium chloroacetate; carrying out quaternization reaction with the trimethylamine; and then acidizing with the sulfuric acid to prepare the betaine hydrochloride. The invention does not need expensive alkali and salt, and therefore, the cost is 15-20 percent lower than that of the traditional process; the product has simple and sufficient separation, and three wastes can not be generated, and therefore, the betaine hydrochloride has higher economy and environment protection.

Description

(1) Technical field

[0001] The invention belongs to the technical field of fine chemicals, and in particular relates to an environment-friendly preparation method of betaine hydrochloride. (2) Background technology

[0002] The chemical name of betaine hydrochloride is trimethylglycine hydrochloride, which is a quaternary ammonium alkaloid with the molecular formula C 5 h 11 NO 2 ·HCL, can be dissolved in water and alcohol, the aqueous solution becomes acidic, can withstand high temperature below 200 ℃, and has strong oxidation resistance. As a new livestock and poultry feed additive, betaine hydrochloride has a profound impact on the growth and carcass quality of livestock and poultry.

[0003] The preparation methods of betaine hydrochloride include natural beet molasses extraction method and chemical synthesis method. The former has certain limitations in its application and promotion due to the limited source of raw materials; the traditional chemical synthesis metho...