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Purification method for betaine hydrochloride

A purification method and technology of betaine, which is applied in chemical instruments and methods, organic chemistry, cyanide reaction preparation, etc., can solve the problems of incomplete removal, lack of research and reports, high content of burnt residue, etc., and achieve significant economic and social benefits , simple operation steps, the effect of reducing solubility

Active Publication Date: 2014-11-19
CHEM TECH ACAD OF SHANDONG PROVINCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still has a small amount of calcium sulfate that can be dissolved in the supersaturated aqueous solution of betaine hydrochloride and cannot be completely removed, resulting in a product with a burnt residual content of up to 2-3%, exceeding the national standard (NY399-2009, betaine salt The burnt residual content of betaine hydrochloride is 0.2%) more than ten times, which has seriously affected the quality of betaine hydrochloride produced by the calcium process and greatly limited the popularization and use of the calcium process. Sodium process with large discharge of three wastes
[0007] Therefore, the development of a suitable refining and purification process to efficiently remove the calcium sulfate doped in the betaine hydrochloride produced by the calcium method is of great significance to the large-scale production of the calcium process, and it also has significant economic and economic benefits. social benefits, but at present there is a lack of research and reports in the relevant direction at home and abroad

Method used

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  • Purification method for betaine hydrochloride
  • Purification method for betaine hydrochloride

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Take 100g of crude betaine hydrochloride (2.66% of the residue on ignition), add it to 110 grams of water at 50°C, and dissolve it completely; then, add 22 grams of ethanol, raise the temperature to reflux, and a small amount of white solid forms are precipitated; after hot filtration, 0.5 g of filter cake was obtained, 22 g of concentrated hydrochloric acid was added to the filtrate, the system gradually dropped to room temperature, and a large amount of white solid was precipitated, filtered and dried to obtain 68 g of betaine hydrochloride with a content of 99.21% and a residual content of 0.12%.

Embodiment 2

[0031] Take 100 grams of crude betaine hydrochloride (2.66% of the residue on ignition), add it to 110 grams of water at 50°C, and just dissolve it completely; After filtering, 0.5 g of filter cake was obtained, 22 g of concentrated hydrochloric acid was added to the filtrate, the system gradually dropped to room temperature, and a large amount of white solid was precipitated, filtered and dried to obtain 70 g of betaine hydrochloride with a content of 99.28% and a residual content of 0.11 %.

Embodiment 3

[0033] Take 100 grams of crude betaine hydrochloride (burning residue 2.66%), add it to 110 grams of water at 50 ° C, and just dissolve completely; then, add 22 grams of ethanol, heat up to reflux, and a small amount of white solids are precipitated; after hot filtration , Obtain 0.5 gram filter cake, add 22 gram acetic acid in the filtrate, system is down to room temperature gradually, separate out a large amount of white solids, filter, dry, obtain 83 gram betaine hydrochlorides, content 99.35%, burning residue content is 0.09%.

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Abstract

The invention discloses a method for purifying betaine hydrochloride. The steps are as follows: the crude product of betaine hydrochloride obtained by the calcium method is firstly added to an aqueous solution of alcohol to remove part of the calcium sulfate, and then acid is added to make the betaine hydrochloride Precipitate to purify betaine hydrochloride. The method has simple operation steps, does not produce three wastes, and meets environmental protection requirements. The refined betaine hydrochloride has a purity of more than 99%, and the content of burning residue is reduced to less than 0.2%, which meets the national quality standard, and has remarkable economic and social benefits.

Description

technical field [0001] The invention relates to a method for purifying betaine hydrochloride, in particular to a method for purifying crude betaine hydrochloride prepared by a calcium method, and belongs to the technical field of fine chemicals. Background technique [0002] Betaine hydrochloride, chemical name: Trimethylglycine lactone hydrochloride, trimethylbetaine hydrochloride, English name: (Carboxymethyl) trimethylammonium hydrochloride, white to light yellow crystalline powder, melting point 241-242°C , taste sour, hygroscopic, soluble in water, ethanol, insoluble in ether, chloroform, reaction with alkali. [0003] Betaine hydrochloride is mainly used as a feed additive. It is a nutritional additive widely used in livestock, poultry and aquaculture to induce food and promote growth. In addition, betaine hydrochloride can also be used to prepare veterinary drug "tylosin". [0004] At present, the preparation methods of betaine hydrochloride mainly include the calc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C229/12C07C227/40
Inventor 赵景瑞冯维春胡波鲁琳琳杨旭刘丽秀王灏孟宪兴
Owner CHEM TECH ACAD OF SHANDONG PROVINCE