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A kind of method for preparing glycolic acid from glycerol

A technology of glycolic acid and glycerin, which is applied in the field of preparation of glycolic acid, achieves the effects of rapid and thorough reaction, easy control, and simple steps

Active Publication Date: 2016-03-30
湖州观辰生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are reports on the technology of preparing glycolic acid by oxidation of glycerol as raw material, it still relies on expensive noble metals as catalysts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First place 3g of glycerin in a disc-shaped glass container containing 30ml of water, and then place the container in a water bath. Then add 15 mL of hydrogen peroxide with a mass concentration of 30% and 1.5 g of zinc oxide, start magnetic stirring at a speed of 200 rpm, and place the container under ultraviolet light for 3 hours of irradiation degradation.

[0028] After the completion of the reaction, the undissolved solid was removed by filtration, and the yield of the filtrate glycolic acid was 77% after analysis.

Embodiment 2

[0030] First place 3g of glycerin in a disc-shaped glass container containing 30ml of water, and then place the container in a water bath. Then add 20 mL of hydrogen peroxide with a mass concentration of 30% and 2 g of zinc hydroxide, start magnetic stirring at a speed of 200 rpm, and place the container under ultraviolet light for 5 hours of radiation degradation.

[0031] After the reaction was completed, the undissolved solid was removed by filtration, and the yield of the filtrate glycolic acid was 71% after analysis.

Embodiment 3

[0033] First place 3g of glycerin in a disc-shaped glass container containing 30ml of water, and then place the container in a water bath. Then add 15 mL of hydrogen peroxide with a mass concentration of 30% and 3 g of basic zinc carbonate, start magnetic stirring at a speed of 200 rpm, and place the container under ultraviolet light for 5 hours of radiation degradation.

[0034] After the reaction was completed, the undissolved solid was removed by filtration, and the yield of the filtrate glycolic acid was 68% after analysis.

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Abstract

The invention discloses a method for preparing glycolic acid from glycerinum. Glycerinum used as a raw material and water used as a solvent undergo an oxidative degradation reaction in the presence of an oxidizing agent and a stabilizing agent under the condition of UV-irradiation, so as to obtain glycolic acid. The stabilizing agent is a zinc compound. According to the invention, peroxide is decomposed through ultraviolet light to generate free radical simultaneously with cooperation of the stabilizing agent, so as to realize selective regulation and control of the product. Steps for preparation of the glycolic acid by the above method are simple, heating and compression are not required, and the method is easy to control. The oxidizing agent and the stabilizing agent used in the invention are low-cost, and no organic solvent is needed in the degradation process. Under the mild condition, preparation conversion of the product is realized. In comparison with a present conversion method of a micromolecular raw material from a petroleum-base source, the method provided by the invention has obvious advantages. The method is a green, environmentally-friendly, efficient and economical glycolic acid production method which has huge potential.

Description

Technical field [0001] The invention relates to a preparation method of glycolic acid, in particular to an environment-friendly and efficient method for preparing glycolic acid from glycerin. Background technique [0002] Glycolic acid, also known as glycolic acid or glycolic acid, is the simplest aliphatic hydroxy acid. It is mainly found in sugarcane beets and immature grapes in nature, but the content is low. Glycolic acid is an important organic synthesis intermediate and chemical product with a wide range of applications: it can be used as cleaning agent, fungicide, fiber dyeing agent, detergent, welding agent ingredients, varnish ingredients, copper etching agent, adhesive Mixtures, petroleum demulsifiers and metal chelating agents, etc.; sodium salt and potassium salt of glycolic acid can be used as electroplating bath additives to produce organic synthesis platform compounds such as ethylene glycol; at the same time, glycolic acid is also used to prepare new biodegradable...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/285C07C59/06C07C53/02
CPCC07C51/285C07C59/06C07C53/02
Inventor 佘振朱锦那海宁
Owner 湖州观辰生物科技有限公司
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