Method for separating lignin and holocellulose from wood fiber raw materials and application thereof

Abstract

The invention relates to utilization and technology of agriculture and forestry biological data, in particular to a method for separating lignin and holocellulose from wood fiber raw materials. The method comprises the following steps: a, wood fiber raw materials are mixed with an alkali liquor and then soaked and moistened; b, the soaked and moistened wood fiber raw materials are homogenized and then filtered and separated to obtain solid residues and a filtrate I; c, the solid residues which are washed with water are added into a benzene sulfonate water solution for digestion, and the digested solid residues are filtered and separated to obtain residues containing holocellulose and a filtrate containing lignin; d, the residues containing holocellulose are washed to obtain holocellulose; e, water is added into the filtrate containing lignin to separate lignin, filtering is performed to obtain lignin residues and a filtrate II, and the lignin residues are washed and dried to obtain lignin. The method provided by the invention is simple and feasible in process, environment-friendly, and low in toxicity, the lignin extraction yield is high, and the saccharification efficiency of holocellulose obtained through separation is also high.

Description

technical field [0001] The invention relates to the utilization and technology of agricultural and forestry biological data, in particular to a method and application for separating lignin and cellulose from lignocellulosic raw materials. Background technique [0002] With the increasing tension of global fossil fuels and increasingly serious environmental pollution, the energy and environmental crisis has become a major obstacle to the sustainable development of human society in the 21st century. The use of renewable biomass as an alternative to fossil fuels has become increasingly urgent and important. Biomass fuels and bio-based products are one of the important research directions. [0003] Lignocellulosic raw materials are the most abundant and cheapest renewable resources on earth. Lignocellulosic biomass produced through photosynthesis in the world is as high as 100 billion tons every year, but 89% of it has not been utilized by humans. my country is very rich in l...

AI Technical Summary

Problems solved by technology

[0006] At present, my country's polymer materials and chemicals mainly rely on petroleum resources. Among them, the plastic market alone consumes more than 70 million tons per year, equivalent to about 80 million tons of petroleum resources. However, the biomass-based substitute products are less than 1%, so research and development are urgently needed. Petroleum-based products Biomass-based products, such as energy-saving insulation materials, thermosetting resin materials, functional polymer materials and other products, reduce oil dependence and make positive contributions to addressing climate change and energy crises

This method is only applicable to shrub red willow, and cannot be applied to most lignocellulosic raw materials, which has great limitations, and acidic substances such as sulfuric acid or hydrochloric acid need to be added

Images