A method for extracting tailing acid substances in liquor brewing and liquor

CN121046174BActive Publication Date: 2026-06-23NANAN GAOJIE ELECTRONICS TECH +1
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Patent Information

Application Number
CN202511589400.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-11-03
Publication Date
2026-06-23
Estimated Expiration
2045-11-03

AI Technical Summary

Technical Problem

Existing technologies for extracting acidic substances from the tail of liquor during baijiu brewing suffer from problems such as low extraction efficiency, poor selectivity, difficulty in controlling impurities, high energy consumption, and insufficient environmental performance, which affect the flavor and quality of the liquor.

Method used

A chelation precipitation-microfiltration coupling process is used to remove metal ions and colloidal impurities. Hexanoic acid molecularly imprinted polymer adsorbent is used to specifically adsorb acidic substances. Combined with gradient pH desorption and nanofiltration membrane separation, a high-purity acid concentrate is obtained, and environmentally friendly discharge is achieved through microbial wastewater treatment.

Benefits of technology

It significantly improves the selective extraction capability of acidic substances, removes impurities, reduces energy consumption, enhances the purity and compatibility of the wine, ensures the quality of the wine, and achieves environmentally friendly wastewater treatment.

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Abstract

The application discloses a liquor tailing acid substance extraction method in liquor brewing and liquor, and comprises the following steps of pretreatment, selective adsorption, gradient desorption, membrane separation and purification and liquor body blending. The chelation precipitation-microfiltration coupling process is adopted in the pretreatment to remove metal ions and colloidal impurities; the acid substances are specifically adsorbed through a hexanoic acid molecular imprinting polymer adsorbent, and step-by-step elution is realized by combining with gradient pH desorption; high-purity acid concentrated solution is obtained through nanofiltration membrane separation and activated carbon adsorption, and after screening, the high-purity acid concentrated solution is blended with a base liquor body to improve the quality of the liquor.
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Citation Information

Patent Citations

  • A method for extracting acidic substances from brewing tail water

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  • Method for extracting acid substances in brewing after-run

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