Green circulation method for producing ethyl maltol

An ethyl maltol, green technology, applied in the green recycling field of ethyl maltol production, can solve the problems of high energy consumption, uneconomical and the like, and achieve the effects of mild production conditions, cost saving and production cost reduction

Active Publication Date: 2020-08-18
广东省肇庆华格生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of high energy consumption and uneconomical solid waste treatment in the existing production of ethyl maltol, and provides a green environmental protection, low energy consumption, which can make full use of the waste in the production of maltol, and can obtain Higher economic returns, ultimately reducing the production cost of maltol and reducing pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of green circulation method of maltol production is characterized in that: comprises the following steps:

[0026] a: Add water to the solid waste containing basic magnesium chloride produced in the production of ethyl maltol and stir evenly, wherein the weight ratio of water to the solid waste containing basic magnesium chloride is 1.8:1 to obtain waste liquid containing basic magnesium chloride;

[0027] b: Pump the waste liquid containing basic magnesium chloride into the distillation still, distill the organic solvent in the waste liquid containing basic magnesium chloride under reduced pressure, and dry the organic solvent for recycling in the ethyl maltol production system;

[0028] c: adding dilute hydrochloric acid solution into the waste liquid containing basic magnesium chloride until the pH value of the solution is 5, wherein the mass fraction of the dilute hydrochloric acid solution is 14%;

[0029] d: pass the solution obtained in step c through a fi...

Embodiment 2

[0036] Compared with Example 1, the difference of this embodiment is that the mass fraction of dilute hydrochloric acid solution in step c is 13%, the addition of sodium hydroxide solution in step e is 1.05 times of theoretical demand, and the molar amount of sodium hydroxide solution The concentration is 2.5mol / L. After testing, the recovery rate of magnesium in this embodiment reaches 94.57%, and the product purity reaches 95.92%.

Embodiment 3

[0038] Compared with Example 2, the difference of this embodiment is that the mass fraction of dilute hydrochloric acid solution in step c is 13%, the addition of sodium hydroxide solution in step e is 1.15 times of theoretical demand, and the molar amount of sodium hydroxide solution The concentration is 4mol / L. After testing, the recovery rate of magnesium in this embodiment reaches 93.87%, and the product purity reaches 95.16%.

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Abstract

The invention requests to protect a green circulation method for producing ethyl maltol. The method is characterized in that the method comprises the following steps: adding water into the basic magnesium chloride-containing solid waste and uniformly stirring; then distilling under reduced pressure to remove the organic solvent, adding acid, then further decolorizing through a tubular filter provided with activated carbon, then dropwise adding a sodium hydroxide solution with the molar concentration of 2.5-4mol/L; and after the reaction is completed, centrifuging, drying, crushing, grading, inspecting and packaging. The method is short in technological process and mild in production condition, waste in maltol production can be fully utilized, high economic returns can be obtained, finally,the production cost of maltol is reduced, and pollution is reduced. The utilization efficiency of resources is effectively improved, and the greenness and sustainability of a maltol production process are improved.

Description

technical field [0001] The invention relates to the technical field of maltol production, in particular to a green cycle method for ethyl maltol production. Background technique [0002] Ethyl maltol, English name: ethylmaltol, chemical name: 2-ethyl-3-hydroxy-4H-pyrone (2-ethyl-3-hydroxy-4H-pyrone), molecular formula: C 7 h 8 0 3 , is a white acicular or white crystalline powder with a fragrant aroma. It is used more and more widely as a flavor improver and flavor enhancer. It is recognized as a safe, reliable, less dosage and effective food additive. It is a good fragrance synergist for tobacco, food, beverage, flavor, fruit wine, daily cosmetics, etc. It has a significant effect on improving and enhancing the fragrance of food, sweetens sweets and prolongs the storage period of foods. In 1970, ethyl maltol was officially included in the ranks of food additives by the World Health Organization and the Food and Agriculture Organization of the United Nations. With its re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/22C07D309/40C25B1/16
CPCC01F5/22C07D309/40C25B1/16C01P2006/80
Inventor 彭志强李俊召温细坤覃伟华
Owner 广东省肇庆华格生物科技有限公司
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