Novel cellulose extraction process

A cellulose and crude cellulose technology, applied in multi-stage pulping process, fiber raw material treatment, digester, etc., can solve the problems of high raw material consumption, low cellulose extraction rate, and destruction of active ingredients in the extraction process, and achieve low odor , good growth and improved yield

Active Publication Date: 2012-07-04
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] Embodiment 1 (Asparagus pulping)

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

Embodiment 2

[0043] Embodiment 2 (Asparagus pulping)

[0044] With 300g Asparagus japonica (moisture content 10.2%), about 2500ml (residual alkali content is about 0.65%) of the soaking solution left in Example 1 is supplemented with water and supplemented alkali to 3000ml 1.0%NaOH solution Soak after 6 hours and filter out, put Put it into the container, put it in a pressure cooker, steam it at 0.2MPa and 118°C for 2 hours, take it out and polish it, wash the pulp, filter it out, and dry it at 105°C to constant weight to get 149.4g of crude cellulose, the cellulose yield was 49.8%. Crude cellulose beating, paper forming and other operations, and finally check the paper performance. Paper properties are as follows: tensile index 37.86N.m / g, tear index 14.77mN.m 2 / g, burst index 3.93kPa×m 2 / g, the folding endurance is 47 times.

Embodiment 3

[0045] Embodiment 3 (Asparagus pulping)

[0046] With 300g Asparagus japonica (moisture content 10.2%), about 2500ml (residual alkali content is about 0.6%) of the soaking solution left in Example 2 is replenished with water and added alkali to 3000ml 1.0%NaOH solution and soaked for 4 hours and then filtered out. Put it into a beaker and then place it in a pressure cooker at 0.2MPa and steam at 118°C for 2 hours, then take it out and polish it, wash the pulp, filter it out, and dry it at 105°C to constant weight (about 10 hours) to obtain 143g of crude cellulose , The cellulose yield was 48%. Crude cellulose beating, paper forming and other operations, and finally check the paper performance. 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, the folding endurance is 46 times.

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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 flow process is that the plant raw materials are first soaked in dilute alkali, steamed or boiled under pressure, and finally polished and pulp washed to obtain cellulose. Background technique [0002] At present, the most important use of cellulose is papermaking, and it may be widely used in other fields. Paper is a necessity in national production and life. Statistics show that the consumption of paper and cardboard in my country increased from 24.3 million tons in 1994 to 54.4 million tons in 2004, and the proportion of the world's total consumption increased from 9.1% to 13.2%. In 2006, the total consumption of paper and cardboard in my country was 66 million tons, and the import volume was 32.16 million tons with an annual growth rate of 11.3%, ranking second in the world, second only to the United States, and still showing a growth momentum i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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