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A method of producing cellulose, lignin and xylose by biomass materials

A biomass raw material, cellulose technology, applied in the field of bioengineering, can solve the problems of difficult recovery of waste acid, high discharge of waste and waste liquid, low recycling rate, etc., and achieve the effect of high purity

Inactive Publication Date: 2009-03-04
深圳市利世隆科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After searching the literature of the prior art, it was found that the invention of Chinese Patent No. 02145150.8, titled "Method for Preparing Reducing Monosaccharides by Hydrolysis of Biomass", proposed the following technical scheme: using biomass as raw material and dilute acid as catalyst, Hydrolyze in the temperature range of 100-200°C to obtain fermentable monosaccharides. Since this method uses inorganic acid to hydrolyze biomass like other concentrated acid hydrolysis processes, it is difficult to recover waste acid or the recovery rate is low in the production process. , high waste and waste liquid discharge, not taking advantage of the disadvantages of environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Preparation of xylose and xylooligosaccharides, cellulose and lignin from wheat straw

[0018] Take wheat straw and crush it through a 64-mesh sieve, weigh 1g and put it into a round bottom flask, add 8ml of trifluoroacetic acid, cover and seal, soak in a sand bath at 60°C for 12h, then cool to 18°C, then add 80ml of isoamyl alcohol and mix thoroughly , stand still for 12 hours to precipitate a precipitate, separate the precipitate, wash and dry to obtain 0.46g of amorphous cellulose, distill the cellulose precipitation mother liquor to collect the fraction at 75-85°C to recover trifluoroacetic acid, collect the fraction at 115-125°C to obtain the acetic acid generated by the reaction , then cool the distilled cellulose precipitation mother liquor to 18°C ​​and let it stand for 12 hours to precipitate the precipitate, separate, wash and dry the precipitate to obtain 0.15g of xylose and xylooligosaccharides, and distill the xylose and xylooligosaccharide precipi...

Embodiment 2

[0019] Example 2 Preparation of xylose and xylooligosaccharides, cellulose and lignin from wheat straw

[0020] Take wheat straw and crush it through an 8-mesh sieve, weigh 1g and put it into a round-bottomed flask, add 4ml of trifluoroacetic acid, cover and seal, soak in a sand bath at 75°C for 6h, then cool to 25°C, then add 20ml of n-pentanol to fully Mix and let stand for 6 hours to precipitate precipitate, separate, wash and dry the precipitate to obtain 0.43g of amorphous cellulose component, distill the cellulose precipitation mother liquor to collect 75-85°C fraction to recover trifluoroacetic acid, collect 115-125°C fraction to recover raw The acetic acid generated by the decomposition of the substance, the distilled cellulose precipitation mother liquor was cooled to 25°C and then left to stand for 6 hours to precipitate the precipitate, the precipitate was separated, washed and dried to obtain 0.20g of xylose and xylooligosaccharides, distilled xylose and low Collec...

Embodiment 3

[0021] Example 3 Preparation of xylose and xylooligosaccharides, cellulose and lignin from corn stalks

[0022] Take corn stalks and crush them through an 8-mesh sieve, weigh 1g and put them into a round bottom flask, add 2ml of trifluoroacetic acid, then cover and seal, soak in a sand bath at 80°C for 8h, then cool to 30°C, and then add 20ml of isopropanol Mix well, let stand for 2 hours to precipitate precipitate, separate, wash and dry the precipitate to obtain 0.48g of amorphous cellulose, distill the cellulose precipitation mother liquor to collect 75-85°C distillate to recover trifluoroacetic acid, cool the distilled cellulose precipitation mother liquor After reaching 35°C, let stand for 12 hours to precipitate a precipitate. The precipitate is separated, washed, and dried to obtain 0.25g of xylose and xylooligosaccharides. Distill the mother liquor of xylose and xylooligosaccharides to collect the 78-88°C fraction to recover isopropyl Alcohol, collect fractions at 115-...

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PUM

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Abstract

A method for using biomass to produce cellulose, lignin and wood sugar comprises that breaking and screening the biomass, using low-boiling-point organic acid to immerge to decompose the biomass into wood sugar and oligosaccharide, and fluidize the cellulose and lignin, cools the liquid biomass after reaction, adds organic solvent, mixes uniformly and lays, after deposits completely, separating deposits and washes, dries to obtain non-shaped cellulose, distills the mother liquid of cellulose, recycles organic acid and generated volatile organics, distills mother liquid, cools and lays until complete deposition, separates deposits, washes, and dries to obtain wood sugar and oligosaccharide, evaporates to recycle the wood sugar and the organic solvent of deposited mother liquid, then separates the deposits, and dries to obtain lignin. The invention can completely circulate organic acid and organic solvent without waste discharged.

Description

technical field [0001] The invention relates to a method for refining and producing cellulose, lignin and xylose from biomass raw materials in the technical field of bioengineering. Background technique [0002] Biomass refers to a variety of biological substances that organisms use photosynthesis to synthesize carbon dioxide cycle. It can store solar energy chemically. It is carbon stored in the biosphere in a renewable form. It is an important link in the carbon cycle on the earth. The main forms of biomass are forest trees such as branches, agricultural straw such as wheat straw, rice straw, and corn stalk, and grasses such as miscanthus. These substances are mainly composed of cellulose, hemicellulose and lignin cross-linked and bonded to each other to form a dense texture, which is difficult to separate and degrade. Therefore, the dissociation processing of biomass raw materials is one of the biggest technical bottlenecks of bioutilization. The breakthrough of this te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/00C07G1/00
CPCC07G1/00D21C3/20D21C5/00C13K1/04C08H8/00C08B37/0057
Inventor 李荣秀董德贤陈德兆李彦夷孙杰
Owner 深圳市利世隆科技有限公司
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