Normal atmosphere degreasing crude glycerine pretreatment method for separating wood fiber biomass components

Abstract

The invention relates to a normal pressure degreased crude glycerin pre-treatment method for realizing the separation of components of wood fiber biomass. The method comprises the following steps: the wood fiber biomass and the degreased crude glycerin are evenly mixed; under atmospheric pressure or micro-pressure, by auto-catalysis of the glycerin or addition of catalyst, the mixture is heated up and cooked; after cooking, the mixture is cooled down and the components of the mixture are fully dissolved; after filtering and washing, glycerin cellulose with good enzymolysis property is obtained; the filtrate is regulated to be weak acid, condensed, deposited in ethanol, and filtered for the second time to obtain semi-cellulose components; and the secondary filtrate is reclaimed by the ethanol, regulated to be strong acid, deposited and centrifuged to obtain the glycerin lignose component. The method has the advantages of not only facilitating economic utilization of low-grade crude glycerin, but also solving the potential danger of organic solvent such as low-boiling point ethanol in the magnification process of the pulping process, such as high pressure operation and easy burning and explosion of volatile gases.

Description

technical field

[0001] The invention is a method for separating and classifying the components of lignocellulosic biomass, belonging to the field of biochemical engineering of lignocellulosic biomass, and relates to the industrial and technological process of using degreased crude glycerin to pretreat lignocellulosic biomass to realize component separation. formula. Background technique

[0002] The carbohydrates in natural lignocellulosics vary widely, and their structure is extremely complex, which is manifested in the following aspects: the content of cellulose and hemicellulose in lignocellulosic biomass from different species is different; the cellulose from different species The structure of hemicellulose is different; the same wood fiber is composed of many macromolecules in a complex and compact structure. These lead to the complex and dense structure of lignocellulosic biomass, and it is difficult to directly utilize high-value, especially lignin, as the adhesive a...