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Method for extracting cellulose from straw

A cellulose and straw technology, which is applied in cellulose raw material pulping, fiber raw material, fiber raw material processing and other directions, can solve the problems of low utilization rate, fire hazard, environmental pollution, etc., and achieve the effect of low processing temperature

Inactive Publication Date: 2018-10-16
通化县兴隆中药材专业合作社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Straw, as an important agricultural by-product in northern my country, contains rich chemical components that can be used, but its utilization rate has been very low. Except for a small p

Method used

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  • Method for extracting cellulose from straw

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Effect test

Embodiment 1

[0027] A method for extracting cellulose from straw, comprising the steps of:

[0028] 1) Pretreatment: remove impurities such as stone and soil from 5 g of straw, remove leaves and cut into small sections, wash and dry at 70-80° C. for 1-2 hours to obtain cleaned straw; The straw is crushed and passed through a 40-60 mesh sieve to obtain straw powder;

[0029] 2) Mix the straw powder and 5% aqueous sodium hydroxide solution in a mass ratio of 1:8 and soak for 48 hours to obtain the first mixed solution;

[0030] 3) Subjecting the first mixed solution to steam explosion treatment for 3 minutes under the condition of pressure ≥ 0.04Mpa, then filtering, drying the filter residue at 70-80°C for 1-2 hours to obtain a pretreated product;

[0031] 4) Mix the pretreated substance and 3-methyl-N-butylchloropyridine solution in a mass ratio of 1:10, and stir at 50°C for 5 hours; then filter to obtain the second mixed solution ;

[0032] 5) Concentrate and dry the second mixed soluti...

Embodiment 2

[0035] A method for extracting cellulose from straw, comprising the steps of:

[0036] 1) Pretreatment: Remove impurities such as stones and soil from 5 g of straw, remove leaves and cut into small sections, wash and dry at 80° C. for 2 hours to obtain cleaned straw; crush the cleaned straw , and passed through a 50-mesh sieve to obtain straw powder;

[0037] 2) Mix the straw powder and 5% sodium hydroxide solution at a mass ratio of 1:8 and soak for 48 hours; obtain the first mixed solution;

[0038] 3) Subjecting the first mixed solution to steam explosion treatment for 3 minutes under the condition of pressure ≥ 0.04 Mpa, then filtering, and drying the filter residue at 70° C. for 1 hour to obtain a pretreated product;

[0039] 4) Mix the pretreated substance and 3-methyl-N-butylchloropyridine solution in a mass ratio of 1:10, and stir at 50°C for 5 hours; then filter to obtain the second mixed solution ;

[0040] 5) Concentrate and dry the second mixed solution, wash wi...

Embodiment 3

[0042] 1) Pretreatment: remove impurities such as stones and soil from 5 g of straw, remove leaves and cut into small sections, wash and dry at 75° C. for 2 hours to obtain cleaned straw; crush the cleaned straw , and passed through a 50-mesh sieve to obtain straw powder;

[0043] 2) Mix the straw powder and 5% sodium hydroxide solution at a mass ratio of 1:8 and soak for 48 hours; obtain the first mixed solution;

[0044] 3) subjecting the first mixed solution to steam explosion treatment for 3 minutes under the condition of pressure ≥ 0.04 Mpa, then filtering, and drying the filter residue at 75° C. for 1 hour to obtain a pretreated product;

[0045] 4) Mix the pretreated substance and 3-methyl-N-butylchloropyridine solution in a mass ratio of 1:10, and stir at 50°C for 5 hours; then filter to obtain the second mixed solution ;

[0046] 5) Concentrate and dry the second mixed solution, wash with deionized water for 5 times, and dry at 80° C. for 2 hours to obtain a cellulo...

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Abstract

The invention discloses a method for extracting cellulose from a straw. The method comprises the following steps: pulverizing the cleaned straw, and screening through a 40-60 mesh sieve, thereby obtaining a straw powder; mixing the straw powder and an alkaline solution and soaking for 20-50 hours; obtaining a first mixed solution; implementing steam explosion on the first mixed solution, then filtering, and drying a filter residue, thereby obtaining a pretreatment material; mixing the pretreatment material and 3-methyl-N-butyl chlorinated pyridine solution, stirring for 3-10 hours under the condition of 40-60 DEG C; obtaining a second mixed solution; concentrating and drying the second mixed solution, cleaning with deionized water, and drying to obtain a cellulose extract. The used steam explosion pretreatment technique fulfills the purposes of destroying the steam explosion treatment and activating the cellulose as well, and meanwhile, the hemicellulose is also effectively extracted.The method is simple and feasible, and is suitable for industrialized production.

Description

technical field [0001] The present invention relates to biomass treatment technology. More specifically, it relates to a method for extracting cellulose from straw. Background technique [0002] Cellulose is a macromolecular polysaccharide composed of glucose. Insoluble in water and general organic solvents. It is the main component of plant cell wall. Cellulose is the most widely distributed and most abundant polysaccharide in nature, accounting for more than 50% of the carbon content in the plant kingdom. The cellulose content of cotton is close to 100%, making it the purest natural source of cellulose. In general wood, cellulose accounts for 40-50%, and there are 10-30% hemicellulose and 20-30% lignin. In recent years, with the decline of oil and coal reserves and the rapid growth of prices, people are forced to devote themselves to the development and utilization of renewable resources. The application of cellulose, a high-quality and cheap renewable resource, has a...

Claims

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Application Information

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IPC IPC(8): D21C5/00D21B1/36D21B1/02D21C3/00
CPCD21B1/021D21B1/36D21C3/003D21C5/00
Inventor 龙弘扬龙宏志孔庆军郉云峰
Owner 通化县兴隆中药材专业合作社
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