Method for preparing xylose and arabinose by using simulated moving chromatography

Abstract

The invention relates to a method for preparing xylose and arabinose by using a simulated moving chromatography device. According to the method, xylose mother liquor is adopted as a raw material. The method comprises the specific steps of: a, simulated moving bed separation; b, component A purification; c, filtration; d, concentration; and e, crystallization. The entire process has low operation cost. The product obtained by separation has high purity, high concentration and high yield. Subsequent concentration cost is reduced, operation steps are simplified, production loss is reduced, continuous production can be realized, and production efficiency is improved.

Description

technical field [0001] The invention relates to a method for preparing xylose and arabinose by using simulated mobile chromatography, specifically using xylose mother liquor as a raw material and using simulated mobile chromatography separation equipment to prepare arabinose and xylose. Background technique [0002] Xylose mother liquor is the residual solution after xylose crystallization by xylose manufacturers. The main components contained in it are glucose, xylose and arabinose. Since it can no longer be crystallized, most manufacturers sell the mother liquor cheaply for the production of coke Saccharomyces, a small number of them are used to produce feed yeast. The market value of these two methods is very low, so many manufacturers have been looking for ways to separate and purify the xylose mother liquor to increase the reuse value of the mother liquor. [0003] Chinese patent 200710014175.8 discloses a method for purifying xylose mother liquor using a sequential sim...

AI Technical Summary

Problems solved by technology

[0002] Xylose mother liquor is the residual solution after xylose crystallization by xylose manufacturers. The main components contained in it are glucose, xylose and arabinose. Since it can no longer be crystallized, most manufacturers sell the mother liquor cheaply for the production of coke Saccharomyces, a small number of them are used to produce feed yeast. The market value of these two methods is very low, so many manufacturers have been looking for ways to separate and purify the xylose mother liquor to increase the reuse value of the mother liquor

[0003] Chinese patent 200710014175.8 discloses a method for purifying xylose mother liquor using a sequential simulated moving bed, which uses a sequential simulated moving bed to simultaneously separate glucose, xylose and arabinose components, wherein the purity and concentration of glucose are 5% and 75.6 %, the purity and concentration of xylose are 90.2% and 31.5%, the purity and concentration of arabinose are 85.8% and 7.5%, the results show that the purity and concentration of xylose and arabinose are not high, and the advantages of sequential simulated moving bed have not been fully utilized , part of xylose and arabinose are lost in the extraction of glucose component, resulting in a decrease in the yield of these two components, and a certain decline in the overall economic benefit

Chinese patent 200510040433.0 discloses a method for purifying xylose mother liquor. It uses Saccharomyces cerevisiae to ferment xylose mother liquor to remove glucose, and then uses a simulated moving bed to separate the fermented xylose mother liquor. The amount of yeast consumed in the whole process is very small. At the same time, the processing capacity of the fermentation liquid increases, which leads to the high operating cost of the whole process and is difficult to promote