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Novel cellulose extraction process

A cellulose and crude cellulose technology, applied in the multi-stage pulping process, fiber raw material processing, digester and other directions, can solve the problems of large consumption of raw materials in the extraction process, low cellulose extraction rate, destruction of effective components, etc., and achieve low odor. , good growth, the effect of improving yield

Active Publication Date: 2010-06-23
BEIJING INSIGHT BIOMASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The inventors have found through experiments that the main reasons for the large consumption of raw materials, low cellulose extraction rate, poor quality, and large fluctuations in the existing pulp extraction process are the effective production of cellulose, lignin, etc. caused by excessive alkali and long-term high-temperature cooking. mass destruction of ingredients

Method used

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  • Novel cellulose extraction process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1 (Pulping of Alpine grass)

[0042] Soak 300g of Longxu grass (moisture 10.2%) in 3000ml 1.0% NaOH solution for 6 hours and then filter it out, put it in a beaker and place it in a pressure cooker at 0.2MPa, 118°C for 2 hours after steaming, take it out and polish it. The pulp is washed, filtered, and dried to constant weight at 105°C to obtain 144 g of crude cellulose. The cellulose yield is 48%, and the cellulose extraction rate is above 95%. Crude cellulose beating, papermaking and forming operations, and finally the paper performance is tested. The paper properties are as follows: tensile index 38.86N.m / g, tear index 15.77mN.m 2 / g, burst resistance index 4.03kPa×m 2 / g, the folding endurance is 49 times.

Embodiment 2

[0043] Example 2 (Pulping of Longxugrass)

[0044] Add 300g of Alpine (moisture 10.2%), about 2500ml of the remaining soaking solution in Example 1 (residual alkali content is about 0.65%) to 3000ml 1.0% NaOH solution, soak for 6 hours, and then filter out. Put it into the container and place it in a pressure cooker at 0.2MPa, 118℃, steam for 2 hours, take it out, polish, wash the pulp, filter out, and bake at 105℃ to constant weight, get 149.4g crude cellulose, cellulose yield Is 49.8%. Crude cellulose beating, papermaking and forming operations, and finally the paper performance is tested. The paper properties are as follows: tensile index 37.86N.m / g, tear index 14.77mN.m 2 / g, burst resistance index 3.93kPa×m 2 / g, the folding endurance is 47 times.

Embodiment 3

[0045] Example 3 (Pulping of Longxugrass)

[0046] Add 300g of Alpine (moisture 10.2%), about 2500ml of the remaining soaking solution in Example 2 (residual alkali content is about 0.6%) to 3000ml 1.0% NaOH solution, soak for 4 hours, and then filter out. Put it into a beaker and place it in a pressure cooker at 0.2MPa and steam at 118°C for 2 hours, then take it out, polish, wash and filter out, and bake it at 105°C to constant weight (about 10 hours) to obtain 143g crude cellulose The cellulose yield is 48%. Crude cellulose beating, papermaking and forming operations, and finally the paper performance is tested. The paper properties are as follows: tensile index 37.66N.m / g, tear index 14.57mN.m 2 / g, burst resistance index 3.73kPa×m 2 / g, 46 times of folding endurance.

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Abstract

The invention relates to a novel sectional type process which extracts cellulose from plant bodies, and comprises the following steps: the process is that dilute alkali is first used for soaking the plant bodies, and then pressurizing, steaming, polishing and pulp washing are carried out so that the cellulose is obtained. The sectional type process has the advantages that very dilute alkali can be used for soaking or evaporating the plant bodies, not only the amount of alkali is greatly saved, but also the heating temperature is reduced, the heating time is shortened, the cellulose can be obtained at yield coefficient, and the secondary pollution brought by using sulfide, anthraquinone and other high pollution auxiliary agents is avoided. The soak solution and the cleaning solution can be used together in a cycling way, so liquid or solid organic fertilizer with high concentration can be conveniently obtained.

Description

Technical field [0001] The invention relates to a segmented new process for extracting cellulose from plant raw materials. The process is that the plant raw materials are first soaked with dilute alkali, then pressurized steaming or cooking, and finally grinding and washing pulp to obtain cellulose. Background technique [0002] Currently, the most important use of cellulose is papermaking, and it may also be widely used in other fields. Paper is a necessity in national production and life. Statistics show that the consumption of paper and paperboard in my country increased from 24.3 million tons in 1994 to 54.4 million tons in 2004, and the proportion of total world consumption increased from 9.1% to 13.2%. In 2006, my country’s total consumption of paper and paperboard was 66 million tons, and imports of 32.16 million tons with an annual growth rate of 11.3% ranked second in the world, second only to the United States. In recent years, it is still showing a growth momentum. [...

Claims

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Application Information

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IPC IPC(8): D21C3/02D21C7/00D21C11/04
CPCD21C1/06D21C11/04D21C3/26
Inventor 尹应武纪桂鹏张双艳苟朝英万鹏张玉娟孙瑞张玲燕樊晓林邹鸣鸣
Owner BEIJING INSIGHT BIOMASS
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