Subcritical hydrolysis method for preparing hexose with soluble fiber oligosaccharide

Abstract

The invention relates to a subcritical hydrolysis method for preparing hexose with soluble fiber oligosaccharide, which comprises the following steps that: cellulose or wood fiber are pre-treated and primarily hydrolyzed to obtain mixture which contains soluble fiber oligosaccharide, and the concentration of oligosaccharide, hexose and other components in the mixture is determined. The reaction time for the maximum yield of the hexose is calculated and predicted according to the concentration of the oligosaccharide and the hexose, the set reaction temperature and other subcritical conditions with an oligosaccharide sub-critical hydrolysis kinetics law; and then oligosaccharide is hydrolyzed into glucose under the set subcritical hydrolysis conditions, the product is cooled and the reaction is terminated after the predicted reaction time is reached, and the liquid product is collected and obtained. The subcritical hydrolysis method for preparing hexose with soluble fiber oligosaccharide has simple process and quick reaction, can effectively control and optimize the subcritical process conditions, improves the yield of the target product hexose, provides a novel high-efficiency hydrolysis technical approach for turning the cellulose and the wood fiber waste into resources, is the basis for ethanol production through follow-up fermentation and other technologies, and has wide application prospect.

Description

technical field [0001] The invention relates to a thermochemical hydrolysis method for preparing six-carbon sugars from soluble oligosaccharides, in particular to a subcritical hydrolysis method for preparing fermentable six-carbon sugars from soluble cellooligosaccharides, which belongs to the utilization of biomass energy and the chemical industry technology field. Background technique [0002] Biomass waste recycling technology such as ethanol technology has received extensive attention. In lignocellulosic biomass waste, cellulose is the most important component. Cellulose is a natural polymer compound whose composition is the same as that of starch. It is composed of glucose monomers and its chemical structure is composed of many D-glucopyranose anhydrides. (1-5) Linear macromolecules linked by β(1-4) glycosidic bonds. Due to the above-mentioned polymorphic structure of cellulose, there are a large number of hydrogen bonds between molecules and within molecules and hig...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a subcritical hydrolysis method for preparing six-carbon sugars from soluble cellooligosaccharides, aiming to solve the problem of unclear process conditions, low production efficiency, and low yield of target products. In order to realize the rapid and efficient hydrolysis of soluble cellooligosaccharides to generate six-carbon sugars, it provides a new and efficient hydrolysis technology approach for the key process in the cellulose resource utilization process, which has broad application prospects

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