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Method of preparing pulp by anaerobic fermenting Spartina alterniflora and cooking soda, anthraquinone and fermented Spartina alterniflora

A technology of Spartina alterniflora and anaerobic fermentation, which is applied in papermaking, digesters, textiles and papermaking, etc., can solve problems such as limitations, large pollution load, and poor efficiency of lignin extraction by alkali recovery, so as to alleviate the pressure of raw materials and the environment The effect of pressure

Inactive Publication Date: 2007-02-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional papermaking process uses raw materials to make paper directly. For Spartina alterniflora, only 35-40% of the cellulose can be obtained, while 60-65% of other components enter the papermaking black liquor. Due to the large impurities in the black liquor, the black liquor Alkali recovery or lignin extraction benefits are relatively poor, and the N and P elements inherent in the biomass of Spartina alterniflora also melt into the black liquor, resulting in a very large pollution load and high treatment costs
This has caused great restrictions on the use of Spartina alterniflora as an important fiber resource in the paper industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Take 200 g of dry weight of Spartina alterniflora chopped into small sections of 2 to 3 cm, add 4 g of urea, mix, adjust the carbon-nitrogen ratio to 25:1, put the resulting mixture into a fermentation device, and inoculate with a water content of 80% Add 200g of water to 600g of sludge, and carry out anaerobic biogas fermentation at 35°C for 30 days; then take out the fermentation residue for washing and dehydration to obtain 400g of raw materials for making Spartina alterniflora pulp with a water content of 70%; Spartina pulp manufacturing raw material 44.027, equivalent to absolute dry weight 13.2081g, mixing 1.0652g of sodium hydroxide with a purity of 96% and anthraquinone 0.0066g to obtain the cooking raw material, the cooking raw material is put into a small stainless steel cooking tank, without adding to the cooking raw material Add water, put it directly into the cooking pot and cook with 0.3MPa steam. When the pressure in the cooking pot is 0.08MPa a...

Embodiment 2

[0022] Example 2: Get 300 g of dry weight of Spartina alterniflora chopped into small sections of 2 to 3 cm, add 6 g of ammonium bicarbonate, mix, adjust the carbon-nitrogen ratio to 25:1, put the resulting mixture into a fermentation device, and inoculate the water-containing 900g of 80% sludge, add 300g of water, and carry out anaerobic biogas fermentation at 35°C for 40 days; then take out the fermentation residue for washing and dehydration to obtain 400g of raw materials for making Spartina alterniflora pulp with a water content of 60%; take the above Spartina alterniflora pulp manufacturing raw material 33.0203, equivalent to dry weight 13.2081g, mixing 1.4202g of sodium hydroxide with a purity of 96% and anthraquinone 0.0066g to obtain the cooking raw material, put it into a small stainless steel cooking tank, and add 66.0405g of water to the cooking raw material , put it into the cooking pot and cook with 0.3MPa steam. When the pressure in the cooking pot is 0.08MPa, an...

Embodiment 3

[0023]Example 3: Get 200 g of dry weight of Spartina alterniflora chopped into small sections of 2 to 3 cm, add 4 g of ammonium bicarbonate, mix, adjust the carbon-to-nitrogen ratio to 20:1, put the resulting mixture into a fermentation device, and inoculate the water-containing Add 200 g of water to 60 g of 80% biogas residue, and carry out anaerobic bioacidification at 35°C for 15 days; then take out the fermentation residue for washing and dehydration to obtain 360 g of Spartina alterniflora pulp manufacturing raw materials with a water content of 65%; Take 37.7374 g of the above Spartina alterniflora pulp manufacturing raw material, which is equivalent to 13.2081 g of absolute dry weight, mix 1.7752 g of sodium hydroxide with a purity of 96% and 0.0026 g of anthraquinone to obtain the cooking raw material, add 132.081 g of water to the cooking raw material, and put into a small stainless steel Cooking tank, put it into the cooking pot and cook with 0.3MPa steam. When the pr...

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PUM

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Abstract

The invention relates to a method to produce paper with rice flower via anaerobic fermentation-soda anthraquinone, wherein it comprises: pretreating the rice flower, to generate acid in anaerobic condition or generate methane to ferment for 15-60days; then washing and dewatering the fermented slag; mixing the caustic soda at 6-14% and the anthraquinone at 0.01-0.05%, to be put into slurry boiler; adding water as the ratio at 1:3-1:10; sealing boiler to boil with high-pressure steam to 0.07MP to discharge gas; then closing the discharge valve; at 120-160Deg. C, boiling for 0.5-2 hours to wash slurry, to obtain the rough slurry to produce paper.

Description

technical field [0001] The invention belongs to the technical field of resources and light industry, and specifically relates to a method for producing pulp by anaerobic fermentation-soda anthraquinone cooking of Spartina alterniflora. Background technique [0002] Spartina aterniflora, native to the United States, is a perennial salt marsh plant that grows in the intertidal zone. In the early 1980s, Spartina alterniflora was introduced into China to protect beaches, promote siltation and build land. The introduction of Spartina alterniflora once played a role in protecting seawall safety, promoting economic development in coastal areas, improving ecological environment, and reducing disasters. made a major contribution. However, after more than 20 years of development, Spartina alterniflora has formed a community of 800,000 to 1,000,000 mu in coastal areas of my country. With the dominant community formed by this alien invasive species, it has brought a series of negative ...

Claims

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Application Information

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IPC IPC(8): D21C3/02D21C1/00D21C3/26D21C7/00D21H17/05D21B1/04
Inventor 朱洪光陈小华王彪朱鹏
Owner TONGJI UNIV
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