Method Of Separating Carbohydrate

Abstract

Disclosed is a method of separating carbohydrate, including: mixing formic acid with heteropoly acid, chloride or bromide of lithium, magnesium, calcium, zinc, or iron, or combinations thereof to form a mixing liquid, dissolving a cellulose biomass by the mixing liquid to form a solution, mixing water and the solution to hydrolyze the cellulose biomass for forming a carbohydrate solution, and mixing an extractant and the carbohydrate solution to extract the formic acid out of the carbohydrate solution. The heteropoly acid, the chloride or bromide of lithium, magnesium, calcium, zinc, or iron, or combinations thereof in the carbohydrate solution is separated out of the carbohydrate solution by ion exclusion chromatography separation to obtain a carbohydrate. The method for separating the carbohydrate has the advantages of low temperature, the high speed, the high carbohydrate yield and the like, and does not need to use a reactor made of a material resistant to strong acid corrosion.

Description

technical field [0001] The present invention relates to a method for separating saccharides, and more specifically, to a method for separating saccharides from a hydrolyzed saccharide solution. Background technique [0002] The world is facing the problem that oil reserves are gradually being exploited and exhausted, and the greenhouse effect of the earth's atmosphere will continue to expand. In order to ensure the sustainable survival of human beings, the use of fossil energy and petroleum raw materials is gradually reduced, and new renewable forms of energy and raw materials are developed and utilized. It's a recent world trend. [0003] Lignocellulose is the main component of biomass and the most abundant organic matter on earth. The composition of lignocellulose is mainly cellulose, hemicellulose, and lignin, and its weight content ratio is about 38-50%, 23-32%, and 15-25% in sequence. Glucose can be generated after cellulose is hydrolyzed. However, due to the strong h...

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Problems solved by technology

However, this method requires complex pretreatment process, low hydrolysis activity, slow speed, and expensive cellulolytic enzymes

Dilute acid hydrolysis usually uses relatively cheap sulfuric acid as a catalyst, but it needs to be operated at high temperature (greater than 200°C) in a corrosion-resistant pressure vessel, and the equipment level requirements are high; at the same time, the dilute acid hydrolysis temperature is high, there are many by-products, and the sugar yield is low

Concentrated acid hydrolysis can be carried out at lower temperature and normal pressure, but there are strong corrosiveness of concentrated acid, complicated post-treatment process of hydrolyzate, high acid consumption, and difficult recovery, etc.

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