Method for purifying ethyl maltol

A technology of ethyl maltol and a purification method, which is applied in the field of ethyl maltol purification, can solve the problems of high labor intensity, long process time, and low production efficiency, and achieve low labor intensity, high yield, and high production efficiency Effect

Active Publication Date: 2011-03-30
广东省肇庆香料厂有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The loss of solvents and products is high, the process time is long

Method used

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  • Method for purifying ethyl maltol
  • Method for purifying ethyl maltol
  • Method for purifying ethyl maltol

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0019] Example 1

[0020] The crude ethyl maltol was sublimed, and the sublimation temperature was controlled at 210°C. Then dissolve the sublimated ethyl maltol in a 1:1.3 ethanol-water mixed solution, stir until it is completely dissolved, and the vacuum degree is between -0.095 and -0.09MPa. Then cool to 5°C, wait until ethyl maltol is fully analyzed. Then proceed to solid-liquid separation. The solid obtained after separation is dried under the conditions of 60°C and a vacuum degree of -0.095~-0.09MPa, and finally the finished product is obtained.

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Abstract

The invention discloses a method for purifying ethyl maltol, which is characterized by comprising the following steps of: (1) sublimating a crude ethyl maltol product; (2) dissolving; (3) cooling; (4) carrying out solid-liquid separation; and (5) drying to obtain the finished product. Compared with a method for purifying by adopting solvent decoloration, the method of the invention is simple and convenient to operate and has the advantages of low labor intensity, low solvent and product consumption, high yield, low cost, large production capacity, fast speed, high production efficiency as well as good and stable product quality and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for purifying ethyl maltol. Background technique [0002] The traditional purification method of ethyl maltol is to adopt solvent decolorization purification method. Such as figure 1 As shown, the crude product is dissolved in a solvent, solid-liquid separation after cooling, and then dissolved in the solvent again, repeated 4-5 times, and then dried to obtain the finished product. The loss of its solvent and products is high, the process time is long, the labor intensity is large, and the production efficiency is low. Contents of the invention [0003] In order to solve the above problems, the purpose of this invention is to provide a new method for purifying ethyl maltol, which has a simple and easy-to-control technique and high purification purity. [0004] The object of the present invention is achieved like this: a kind of purification method of ethyl maltol is...

Claims

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Application Information

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IPC IPC(8): C07D309/40
Inventor 唐惠文
Owner 广东省肇庆香料厂有限公司
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