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Green process for extracting fibers from plants

A green process and process technology, applied in fiber raw material processing, natural cellulose pulp/paper, non-woody plant/crop pulp, etc., can solve the problems of small scale, long time consumption, low efficiency, etc., and achieve good growth and improved Effect of fiber yield and noise reduction

Active Publication Date: 2010-12-01
BEIJING INSIGHT BIOMASS
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0010] The invention overcomes the disadvantages of long time-consuming pulping, low efficiency, and small scale of the traditional pulping process, and can make full use of the existing pulping equipment to obtain large-scale, low-cost, high-efficiency, high-yield fibers, reducing the amount of inorganic sodium in the extract. The interference of salt on biological growth makes it possible to use the extract as a biological nutrient source, and realize the goal of full-priced development and comprehensive utilization of plants

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1 (wheat straw pulping)

[0035] Test one: Dissolve 0.378g of solid calcium oxide in 150 grams of water, add 5g of wheat straw (moisture content 8.3%), soak at room temperature for 0.5 hours, then add it into an autoclave and heat it up to boil. Raise the temperature from room temperature to 150°C for 1 hour; keep warm at 150°C for 2 hours; after cooking, cool down and release the pressure, discharge the cooking material, directly beat, wash, filter, and dry at 105°C to constant weight to obtain 3.42g crude Fiber, the crude fiber yield is 74.6%, after screening through a 40-mesh sieve, 0.60 g of sieve residue is obtained, the sieve residue rate is 17.5%, and the fine pulp yield is 61.5%.

[0036] Test 2: Dissolve 0.378g of solid calcium oxide in 150 grams of water, add 5g of wheat straw (moisture content 8.3%), soak at room temperature for 24 hours, add in an autoclave, seal it, and heat it up for cooking. Raise the temperature from room temperature to 150°C...

Embodiment 2

[0037] Embodiment 2 (bamboo pulping)

[0038] Test 1: Bamboo was pre-soaked in lime water for 40 hours, after proper grinding, it was soaked in NaOH solution for the second time, and then steamed, beaten and washed to obtain coarse pulp. The yield of brown stock was 70%, and the Kappa value was 50.51.

[0039] Test 2: Bamboo was pre-soaked in lime water for 40 hours, and then soaked in lime water for a second time for 40 hours after proper grinding, steamed in a pressure cooker, beaten and washed to obtain coarse pulp. The yield of coarse pulp was 71.9%, and the Kappa value was 58.15.

Embodiment 3

[0040] Embodiment 3 (wood pulping)

[0041] Pre-soak the wood with lime water at 60°C for 20 hours, soak it in lime water for 20 hours after proper grinding, then cook it in an autoclave (160°C) for 4 hours, and finally beat and wash to obtain crude fibers. The yield of crude fibers is 65.7%. The fiber extraction rate is above 95%.

[0042] Two, caustic soda pulping

[0043] Embodiment 1 (normal temperature stirring rice straw pulping)

[0044] 10g of rice straw (moisture content 9%) was stirred and soaked in 1.5% NaOH solution at 60°C for 12 hours, filtered out, beaten, washed, and filtered to obtain 6.2g of crude fibers with a crude fiber yield of 68.1%.

[0045] Embodiment 2 (Pulping with caustic soda method in circulation of Asparagus chinensis)

[0046] Test 1: Soak 300g of asparagus (moisture content 10.2%) in 3000ml of 1.0% NaOH solution at room temperature for 6 hours, then filter out, steam at 0.19MPa, 118°C for 2 hours, take out and polish, wash pulp, and filter o...

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Abstract

The invention relates to a sectional green process for extracting fibers from plant raw materials with high efficiency and high yield, which comprises the steps of: firstly, infiltrating or / and soaking plant raw materials with lime water (or carbide slag water solution) or dilute alkali; then steaming or boiling the raw materials; and finally, beating or steaming discharge and pulp washing to prepare fibers. The green process can also be comprehensively used for exploiting the utilization of lignin and extract, so as to realize the full-rate development of plants. The extract in the process can be recycled as a nutrient source for organisms such as plants, microbes, alga and the like, which breaks through the key technical bottleneck of the green and ecological industry, has significant theoretic and application values on the recycling economy, the sustainable development strategy and acquisition of energy sources, advanced materials and biological nutrient source from biomasses, and has extremely profound social benefits, economic benefits and ecological benefits.

Description

technical field [0001] The invention relates to a segmented green process for extracting fibers from plant raw materials with high efficiency and high yield. The process is to infiltrate or / and soak the plant material with lime water (or calcium carbide slag aqueous solution) or dilute lye, then steam or boil, and finally beat or blast and wash the pulp to obtain fibers. The invention can also comprehensively develop and utilize the lignin and the extract to realize the full price development of the plant body. Background technique [0002] The most important use of fibers is to make paper, which 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 paperboard in my country was 66 million tons, and the import vol...

Claims

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Application Information

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IPC IPC(8): D21C3/02D21C7/00D21C11/04D21H11/00D21H11/12
CPCY02P40/40
Inventor 尹应武纪桂鹏张双艳苟朝英万鹏张玉娟孙瑞张玲燕樊小林周鸣鸣
Owner BEIJING INSIGHT BIOMASS
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