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Environmental-protection preparation method of betaine hydrochloride

A technology of hydrochloride and betaine, which is applied in the preparation of organic compounds, chemical instruments and methods, and the preparation of cyanide reactions. Low cost, high economy and environmental protection, simple and sufficient effect of product separation

Inactive Publication Date: 2010-10-20
山东齐鲁中牧生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former has certain limitations in its application and promotion due to the limited source of raw materials; the traditional chemical synthesis method uses sodium chloroacetate and trimethylamine to react, and the generated sodium chloride is difficult to remove
In recent years, the research on this, such as using strong cation exchange resin method, solvent method or replacing sodium hydroxide with calcium hydroxide, has many problems such as high cost, difficult post-treatment, and inability to treat high-salt wastewater. This greatly limits the development of betaine industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The following weight ratio materials are used: chloroacetic acid (content ≥ 98%) 100g, calcium oxide (content ≥ 90%) 32g, trimethylamine (content ≥ 99%) 63g, sulfuric acid 50g.

[0014] The specific operation is as follows:

[0015] Add 100g of chloroacetic acid and 120ml of water into a 500ml reaction bottle, stir well to dissolve, then add 32g of calcium oxide and react at 30-50°C for 2 hours until the pH is 4.0-9.0. After the reaction was completed, 50g of sulfuric acid was slowly added dropwise to adjust the pH to 1.0 to 2.0, the calcium sulfate was filtered, the filtrate was concentrated and crystallized and filtered, and dried to obtain 155g of pure betaine hydrochloride. The content measured by ion chromatography was 97.3 %.

Embodiment 2

[0017] The following weight ratio materials are used: chloroacetic acid (content≥98%) 100g, calcium hydroxide (content≥90%) 40g, trimethylamine (content≥99%) 70g, sulfuric acid 52g.

[0018] The specific operation is as follows:

[0019] Add 100g of chloroacetic acid and 120ml of water into a 500ml reaction bottle, stir well to dissolve, then add 40g of calcium hydroxide and react at 30-50°C for 2 hours until the pH is 4.0-9.0. Continue to stir the reaction at ℃, slowly add 52g of sulfuric acid dropwise after the reaction is completed, adjust the pH to be 1.0 to 2.0, filter calcium sulfate, concentrate and crystallize the filtrate and filter, dry to obtain 150g of pure betaine hydrochloride, and the content measured by ion chromatography is 98.5%.

Embodiment 3

[0021] The following materials are used in the weight ratio: chloroacetic acid (content ≥ 98%) 100g, calcium hydroxide (content ≥ 90%) 43g, trimethylamine (content ≥ 99%) 80g, sulfuric acid 55g.

[0022] Add 100g of chloroacetic acid and 120ml of water into a 500ml reaction bottle, stir well to dissolve, then add 43g of calcium hydroxide and react at 30-50°C for 2 hours until the pH is 4.0-9.0. Continue to stir the reaction at ℃, slowly add 55g of sulfuric acid dropwise after the reaction is completed, adjust the pH to 1.0-2.0, filter the calcium sulfate, filter the filtrate to concentrate and crystallize, and dry to obtain 149g of pure betaine hydrochloride. The content measured by ion chromatography is 99.1%.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C229/12C07C227/18C07C227/08
Inventor 陈林世
Owner 山东齐鲁中牧生物科技有限公司
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