Method for purifying ethyl maltol
A technology of ethyl maltol and a purification method, which is applied in the field of purification of ethyl maltol, can solve the problems of high product loss, high labor intensity, low production efficiency and the like, and achieves high production efficiency, low labor intensity and low cost. Effect
Active Publication Date: 2013-09-04
广东省肇庆香料厂有限公司
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Problems solved by technology
The loss of solvents and products is high, the process time is long, the labor intensity is high, and the production efficiency is low
Method used
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Embodiment 1
[0020] The crude product of ethyl maltol is sublimated, and the sublimation temperature is controlled at 210°C. Then the sublimated ethyl maltol is dissolved in a 1:1.3 ethanol-water mixed solution, stirred until completely dissolved, and the vacuum degree is between -0.095 ~ -0.09MPa. Then cool to 5°C until ethyl maltol is fully separated. Then carry out solid-liquid separation. The solid obtained after separation is dried at 60° C. and vacuum degree of -0.095 to -0.09 MPa to obtain a finished product.
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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. technical background [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...
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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