Method for splitting and deeply processing cellulose straw substance components

Abstract

The invention belongs to the technical field of splitting and deeply processing cellulose straw substance components and particularly relates to a method for splitting and deeply processing the cellulose straw substance components. The method is realized by the following steps of: adding liquid alcohol substances into the straw substances of which hemicellulose or partial hemicellulose is desorbed according to the solid-liquid quality ratio of 1: (2-8); extracting at the temperature of 60-180DEG C for 1-4 hours; carrying out solid-liquid separation, wherein the liquid phase substance is an alcohol solution containing lignin; and adding polyethylene glycol or epoxy compound into the liquid phase substance and refining to obtain biological polyol. According to the invention, by fusing the separated cellulose with biological polyol and polyether polyol produced by using the lignin, the cellulose can be separated and the polyol can be produced by using the lignin. The polyol as the polyether production raw material with extremely high value can be obtained by adopting a simple energy-saving manner and creates huge wealth for enterprises and society.

Description

technical field [0001] The invention belongs to the technical field of intensive processing of straw-like materials, and in particular relates to a method for splitting and deep-processing the components of cellulose straw-like materials. Background technique [0002] At present, with the decrease of petrochemical resources, people are beginning to seek renewable biological resources to replace petrochemical raw materials, and use renewable agricultural and forestry straw to develop a variety of chemical products. In order to make full use of straw cellulose, its components need to be split and separated. Hemicellulose is decomposed into five-carbon sugars, lignin is extracted, and cellulose is decomposed into six-carbon sugars. The technology of decomposing cellulose into five-carbon sugars has been very mature, but the extraction of lignin and the hydrolysis of cellulose have yet to be developed. At present, the decomposition of cellulose is relatively mild, and the more ...

AI Technical Summary

Problems solved by technology

At present, the decomposition of cellulose is relatively mild, and the more environmentally friendly method is cellulase hydrolysis. Although we can use dilute acid or steam explosion to convert hemicellulose into five-carbon sugar and separate it, the remaining cellulose and Lignin is still intertwined, which hinders the accessibility of cellulase, low enzyme utilization, and relatively high decomposition costs. In order to reduce the amount of cellulase and fully decompose cellulose, the best way is to first combine with fiber The lignin intertwined and wrapped together is separated, and the alcohol solvent can extract the lignin from the cellulose straw to achieve the purpose of separating cellulose and lignin, but the separation of the lignin and the extractant is currently a The lignin is precipitated and separated by adding several times of cold water. This method consumes a lot of energy and the separation is not thorough enough.