Processing method for mother liquid in maltol production and device thereof

A treatment method, maltol technology, applied in natural water treatment, chemical instruments and methods, extraction water/sewage treatment, etc., can solve the problems of waste, undiscovered solutions, increase the load of sewage treatment, etc., and achieve the total product yield The effect of improving and reducing sewage treatment load and increasing product output

Active Publication Date: 2008-02-20
ANHUI JINGHE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The original chlorination and neutralization mother liquor (the aqueous solution of the chlorination hydrolyzed material plus alkali neutralization, the main components of which are water, sodium chloride, maltol, etc.) Maltol, etc.) are separated by freezing and standing. After the se...

Method used

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  • Processing method for mother liquid in maltol production and device thereof
  • Processing method for mother liquid in maltol production and device thereof

Examples

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Embodiment Construction

[0027] As shown in Figure 1, the composition of the mother liquor treatment device that the present invention adopts is as follows: at first comprise an extraction tower 4; The left side of extraction tower 4 is provided with a mother liquor pump 2, and mother liquor pump 2 one ends are connected with mother liquor tank 1 with pipeline 3, in addition One end is connected with the bottom of the extraction tower 4 with the pipeline 3; Connect; a waste liquid tank 20 is set on the left side of the extraction tower 4, and the waste liquid tank 20 is connected with the top of the extraction tower 4 with a pipeline 19; an extraction agent storage tank 7 is set above the middle part of the extraction tower 4, and the extraction agent storage tank 7. The upper end is connected with the bottom of the extraction tower 4 with a pipeline 5, the lower end of the extractant storage tank 7 is connected with the inlet of the upper end of the still 9 with a pipeline 8, and the outlet at the low...

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Abstract

The invention relates to a mother liquid processing method during the production of maltol (and ethyl maltol) and a device used for realizing the method, and the invention is characterized in that mother liquid in a mother liquid tank (1) and an extractant chloroform in a chloroform tank (15) are sent respectively by a flow ratio of 20:1 into the upper part and the lower part of an extraction tower (4) by a pump (2) and another pump (17), and the two phases of the chloroform and mother liquid are countercurrently contacted in the extraction tower due to gravity difference, then little amount of maltol in the mother liquid is converted into the extractant phase and drained into an accumulator tank (7) from the bottom of the tower and the mother liquid is drained into a waste liquid tank (20) form the top of the tower. The extractant phase containing maltol is sent into a distiller (9) and heated at the temperature of 90 DEG C to steam out chloroform which is condensed in a condenser (13) and sent into the chloroform tank (15) for recycling. The surplus maltol in the distiller (9) enters a refrigerating kettle (11) and is freezed at the temperature of about 10 DEG C to crystallize out the maltol, the half-finished product of the maltol is taken out and processed through a sublimating process.

Description

Technical field: [0001] The invention relates to a method for treating mother liquor in the production of Guangpu flavor enhancer maltol (and ethyl maltol) and a device for realizing the method. Background technique: [0002] Maltol (and ethyl maltol) is a broad-spectrum flavor enhancer with a pleasant burnt-sweet aroma, widely used in daily chemical, beverage, food, medicine, tobacco, wine and other fine chemical fields. [0003] For the production of maltol, manufacturers at home and abroad mainly adopt the furfural route. The production process is as follows: magnesium and alkyl halides react to synthesize Grignard reagents in the presence of anhydrous ether or tetrahydrofuran solvents, and then Grignard reagents react with furfural. The furfuryl alcohol intermediate is obtained by hydrolysis; the furfuryl alcohol intermediate after the separation of the solvent is chlorinated with chlorine gas at a low temperature in methanol aqueous solution, and then heated and hydroly...

Claims

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Application Information

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IPC IPC(8): C07D309/40C02F1/26C02F103/36
Inventor 杨迎春
Owner ANHUI JINGHE IND
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