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Preparation method of sodium chloroacetate

A technology of sodium chloroacetate and sodium hydroxide, which is applied in the field of fine chemicals, can solve the problems of poor raw material utilization, high purification cost, and low yield, and achieve the effects of simple method, environmental friendliness, and high production efficiency

Inactive Publication Date: 2018-02-02
新乡市巨能合成材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current synthetic method has the defects of relatively low yield, poor utilization rate of raw materials, complex post-treatment process and high purification cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Add 2700L isoamyl alcohol to the reaction kettle, then add 175Kg sodium hydroxide, heat up to 130°C and reflux for 3 hours, then control the temperature at 132-143°C to evaporate 1200L isoamyl alcohol, condense and cool down to 115°C and add the above-mentioned steamed 1200L of isoamyl alcohol, continue to cool down to 80°C, add 1Kg of alumina and 185Kg of chloroacetic acid, stir to raise the temperature to 110°C and keep the temperature constant for 30 minutes. To 110°C, add 1000L of water to the reaction kettle, stir evenly, then transfer the material, then add 300L water to wash the kettle, after washing, the material transfer is completed, and finally the target product sodium chloroacetate is obtained, with a yield of 98% and a product content of 96%. .

Embodiment 2

[0011] Add 2500L isoamyl alcohol to the reaction kettle, then add 150Kg sodium hydroxide, heat up to 130°C and reflux for 3 hours, then control the temperature at 132-143°C to evaporate 1100L isoamyl alcohol, condense and cool down to 115°C, add the above-mentioned evaporated 1100L of isoamyl alcohol, continue to cool down to 80°C, add 0.5Kg of alumina and 150Kg of chloroacetic acid, stir to raise the temperature to 110°C and keep the temperature constant for 30 minutes. Cool down to 110°C, then add 800L of water to the reaction kettle, stir evenly, then transfer the material, then add 500L water to wash the kettle, after washing, the material transfer is completed, and finally the target product sodium chloroacetate is obtained, the yield is 96%, and the product content is 96% %.

Embodiment 3

[0013] Add 3000L isoamyl alcohol to the reaction kettle, then add 200Kg sodium hydroxide, heat up to 130°C and reflux for 3 hours, then control the temperature at 132-143°C to evaporate 1300L isoamyl alcohol, condense and cool down to 115°C and add the above-mentioned steamed 1300L of isoamyl alcohol, continue to cool down to 80°C, add 2Kg of alumina and 200Kg of chloroacetic acid, stir to raise the temperature to 110°C and keep the temperature constant for 30 minutes. to 110°C, then add 1200L of water to the reaction kettle, stir evenly, then transfer the material, then add 300L water to wash the kettle, after washing, the transfer is completed, and finally the target product sodium chloroacetate is obtained, with a yield of 97% and a product content of 96%. .

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PUM

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Abstract

The invention discloses a preparation method of sodium chloroacetate. The preparation method specifically includes: adding 2500-3000L of isoamylol into a reaction kettle, adding 150-200kg of sodium hydroxide, rising temperature to 130 DEG C for backflow for 3h, controlling temperature at 132-143 DEG C, evaporating part of isoamylol, condensing and cooling to 115 DEG C, adding evaporated isoamylol,continuing cooling to 80 DEG C, adding 0.5-2kg of aluminum oxide and 150-200kg of chloroacetic acid, stirring, rising temperature to 110 DEG C, and maintaining constant temperature for 30min; after constant temperature is finished, rising temperature to 120 DEG C for backflow for 30min, evaporating part of isoamylol, cooling to 110 DEG C after evaporation is finished, adding 800-1200L of water into the reaction kettle, stirring well, and then transferring materials; adding 300-500L of water to wash the kettle, and finishing material transfer after washing to finally obtain a target product sodium chloroacetate. Common industrial raw materials are selected and used, and the preparation method which is simple is adopted to prepare sodium chloroacetate. The method is simple, Environmentallyfriendly and high in production efficiency, and target product yield (96-98%) and purity (96%) are high.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a preparation method of sodium chloroacetate. Background technique [0002] Sodium chloroacetate is an important fine chemical product, which is widely used in large-scale industrial production of betaine hydrochloride, thioglycolic acid, carboxymethyl cellulose, adrenaline, H1 receptor protective agent, etc., and is also widely used in Chemicals for dyes (printing and dyeing auxiliaries, neutral brilliant blue), metal processing (rust prevention, cleaning and electroplating) and other fields. The current synthetic method has the defects of relatively low yield, poor raw material utilization rate, complicated post-treatment process and high purification cost. Contents of the invention [0003] The technical problem solved by the invention is to provide a method for preparing sodium chloroacetate with simple process and low cost. [0004] The present inventi...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C53/16
CPCC07C51/412C07C53/16
Inventor 周忠太张齐亮孟红文张小涛张学栋
Owner 新乡市巨能合成材料有限公司
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