Sublimation crystallization process of ethyl maltol

Abstract

The invention discloses a sublimation crystallization process of ethyl maltol. The sublimation crystallization process is characterized in that a crude product receiving kettle is heated in a sublimation section of ethyl maltol, the temperature in the crude product receiving kettle is controlled within 90-92 DEG C, and materials in the crude product receiving kettle are in a molten liquid state and are directly sent to a crystallization kettle to crystallize, so that two procedures of freezing and centrifugal throwing in a traditional process are omitted, and cost inputs in the aspects of equipment, labor, sewage treatment and the like are reduced.

Description

technical field [0001] The invention relates to a process for producing ethyl maltol, in particular to a process for sublimation and crystallization of ethyl maltol. Background technique [0002] The ethyl maltol sublimation crystallization section is to initially purify the ethyl maltol crude product, such as figure 1 As shown, in the existing process, demineralized water needs to be added to the crude product receiving tank during the sublimation process. The main purpose is to make the crude material in a fluid state in the receiving tank, so that the material can be pumped to the freezing tank, and put into the centrifuge after freezing. Crude products are obtained from the raw materials, and the added desalted water becomes sewage, which increases the processing cost. The working environment of the centrifugal dumping materials is poor, and the odor produced affects the physical and mental health of the staff. Contents of the invention [0003] In order to overcome t...

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Problems solved by technology

[0002] The sublimation and crystallization section of ethyl maltol is to initially purify the crude product of ethyl maltol, such as figure 1 As shown, in the existing process, demineralized water needs to be added to the crude product receiving tank during the sublimation process. The main purpose is to make the crude material in a fluid state in the receiving tank, so that the material can be pumped to the freezing tank, and put into the centrifuge after freezing. Crude products are obtained from the raw materials, and the added desalted water becomes sewage, which increases the processing cost. The working environment of centrifugal dumping is poor, and the odor produced affects the physical and mental health of the staff.

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