A kind of method that utilizes liquor lees to prepare xylose

Abstract

The invention relates to a method for preparing xylose by utilizing distiller's grains of Baijiuand belongs to the technical field of comprehensive utilization of byproducts in the white spirit processing industry. The method for preparing the xylose by utilizing the distiller's grains of the Baijiu comprises the following steps: pretreating the distiller's grains of the white spirit, carrying out acid hydrolysis on the distiller's grains of the Baijiu, carrying out alkali hydrolysis on the distiller's grains of the white spirit, regulating pH value of filtrate, carrying out low temperature enzymolysis, carrying out neutralizing treatment, carrying out activated carbon decolouration, removing impurities in decolored solution, carrying out ultrafiltration and nanofiltration, concentrating and drying. The method for preparing the xylose by utilizing the distiller's grains of the white spirit has the advantages that cellulose type materials in the distiller's grains of the Baijiu are comprehensively utilized, and hemicellulose in the distiller's grains of the white spirit can be treated and converted into the xylose, so that a xylose product with high market value is obtained, the distiller's grains of the Baijiu can be effectively treated, and solid waste substances in a white spirit enterprise production process are effectively utilized; meanwhile, a large amount of neutralizing reagent can be saved, process equipment and process cost can be reduced to the utmost extent without introducing a new substance, and product quality is high, so that the method for preparing the xylose by utilizing the distiller's grains of the Baijiu is applicable to industrial production.

Description

technical field [0001] The invention relates to a method for preparing xylose, more specifically, the invention relates to a method for preparing xylose by using liquor distiller's grains, and belongs to the technical field of comprehensive utilization of by-products in the liquor processing industry. Background technique [0002] my country is the world's largest producer and consumer of liquor. It is a brewing country with the most complete varieties of liquor, the longest brewing history, and the largest output. It has also transitioned from a traditional small workshop to a large-scale ecological brewing process. It is particularly significant in terms of enterprise scale, product output, product efficiency and social contribution. According to the data released by the National Bureau of Statistics and the China Alcoholic Drinks Association: In 2014, there were 2,602 enterprises above designated size in my country's brewing industry, with a total brewing output of 75.283 ...

AI Technical Summary

Problems solved by technology

This method pursues the yield of xylose too much, resulting in too simple process, imperfect removal of impurities, and the prepared xylose product is not easy to pass

CN103695571A "Method for preparing xylose and hydrolyzed protein using subcritical water treatment of distiller's grains" uses sulfuric acid, hydrochloric acid or carbon dioxide to prepare xylose from corn distiller's grains under subcritical water conditions. This method needs to be carried out under high temperature and high pressure conditions, and the processing capacity Less, higher energy consumption, and higher requirements for equipment, it is not easy to use in large-scale chemical industry

The acid hydrolysis object of this technology is sugary sweet sorghum stalk distiller's grains, in which high content of multi-variety yeast proteins are easily decomposed into various amino acids at high temperature, which makes the xylose solution complex and difficult to purify