Method for producing hemicellulose by treating straw by ammonia water steam explosion technology

A technical treatment, hemicellulose technology, applied in the field of biomass pretreatment, can solve the problems of long pretreatment time and production cycle, large environmental impact, limited application, etc., and achieve the benefits of subsequent utilization, simple equipment, and improved utilization efficiency Effect

Active Publication Date: 2012-09-12
AOWEI TIANJIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical and chemical methods have high requirements on equipment, high energy consumption, and have the disadvantages of high operating cost and great impact on the environment
Although the b

Method used

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  • Method for producing hemicellulose by treating straw by ammonia water steam explosion technology
  • Method for producing hemicellulose by treating straw by ammonia water steam explosion technology

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Embodiment 1

[0028] A method for producing hemicellulose by treating straw with ammonia steam explosion technology, the steps are as follows:

[0029] 1) Pulverize the straw into straw powder, the particle size is 100 mesh sieve;

[0030] 2) In the steam explosion reaction kettle, successively add straw scraps and ammonia solution with a concentration of 1% by weight, and the dosage ratio is 1g:15ml;

[0031] 3) Start the steam blaster, control the reaction temperature to 160°C, and hold the pressure at 0.6MPa for 10min before blasting;

[0032] 4) Take out the blasted material, filter it, dry it, and then seal it for storage, so as to obtain the pretreated straw raw material;

[0033] 5) Mix the pretreated straw raw material and the NaOH solution with a concentration of 10% by weight evenly, and the dosage ratio is 1g:75ml to obtain a mixture;

[0034] 6) The above mixture was reacted at a temperature of 50 °C for 2 hours, and the filtrate was obtained after filtration;

[0035] 7) The...

Embodiment 2

[0039] A method for producing hemicellulose by treating straw with ammonia steam explosion technology, the steps are as follows:

[0040] 1) Pulverize the straw into straw powder, the particle size is 100 mesh sieve;

[0041] 2) In the steam explosion reaction kettle, successively add straw scraps and ammonia solution with a concentration of 10% by weight, and the dosage ratio is 1g:150ml;

[0042] 3) Start the steam blaster, control the reaction temperature to 140°C, hold the pressure at 0.4MPa for 40min and then blast;

[0043] 4) Take out the blasted material, filter it, dry it, and then seal it for storage, so as to obtain the pretreated straw raw material;

[0044] 5) Mix the pretreated straw raw material and the NaOH solution with a concentration of 5% by weight evenly, and the dosage ratio is 1g:50ml to obtain a mixture;

[0045] 6) The above mixture was reacted at 90°C for 2h, and the filtrate was obtained after filtration;

[0046] 7) The filtrate obtained by filtr...

Embodiment 3

[0050] A method for producing hemicellulose by treating straw with ammonia steam explosion technology, the steps are as follows:

[0051] 1) Pulverize the straw into straw powder, the particle size is 100 mesh sieve;

[0052] 2) In the steam explosion reaction kettle, successively add straw scraps and ammonia solution with a concentration of 1% by weight, and the dosage ratio is 1g:100ml;

[0053] 3) Start the steam blaster, control the reaction temperature to 140°C, hold the pressure at 0.4MPa for 60min and then blast;

[0054] 4) Take out the blasted material, filter it, dry it, and then seal it for storage, so as to obtain the pretreated straw raw material;

[0055] 5) Mix the pretreated straw raw material and the NaOH solution with a concentration of 25% by weight evenly to obtain a mixture;

[0056] 6) The above mixture was reacted at a temperature of 40°C for 2 hours, and the filtrate was obtained after filtration;

[0057] 7) Adjust the pH of the filtrate obtained by f...

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Abstract

The invention discloses a method for producing hemicellulose by treating straw by an ammonia water steam explosion technology. The method comprises the following steps of: crushing the straw into powder, and performing ammonia water low-pressure explosion to treat the straw in a steam explosion reaction kettle; and mixing the pre-treated straw raw materials and a NaOH solution, and reacting with heating to extract hemicellulose. The straw powder is treated by the ammonia water steam explosion technology; the required equipment is simple; a process is simple and convenient; lignin is effectively removed; a large amount of hemicellulose products are extracted successfully; the straw is treated efficiently; the utilization rate of biomass resources is improved; the problems that the straw cannot be degraded easily, and cannot be recycled can be solved; and the method has extremely profound social significance and economic value.

Description

technical field [0001] The invention belongs to the field of biomass pretreatment, and in particular relates to a method for preparing hemicellulose by using ammonia steam explosion technology to treat straw. Background technique [0002] With the gradual depletion of one-time fossil fuel resources and the increasing shortage of energy and resources, how to efficiently and comprehensively utilize renewable energy—biomass energy has become a topic of widespread concern around the world. As the main biomass resource, crop straw has attracted much attention because of its abundant resources, easy production and utilization. [0003] Straw materials are mainly composed of cellulose, hemicellulose and lignin, among which lignin accounts for about 20-30%, and lignin is difficult to degrade, which not only makes the energy stored in it unusable by humans, but also in industrial production, especially. It is the production of toxic substances such as chlorophenol in the paper indus...

Claims

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Application Information

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IPC IPC(8): D21C5/00D21B1/36
Inventor 刘乐鞠美庭李维尊江洋王雁南
Owner AOWEI TIANJIN ENVIRONMENTAL PROTECTION TECH
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