Method for preparing paper making wet end chemical addition agent by using cassava residue as raw material

A technology of chemical additives and cassava residues, which is applied in the direction of adding retention aids, etc., can solve the problems of unreported application examples, limited consumption, environmental pollution, etc., and achieves wide application range, wide PH value application range, and simple preparation process Effect

Inactive Publication Date: 2011-08-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the development of cassava residues is mainly to produce mixed feed and biological fermentation to produce alcohol, etc., but the consumption is limited, and most of the cassava residues are discarded, which not only causes waste of resources, but also seriously pollutes the environment
However, there is no report on the application of papermaking chemical additives using cassava residues as raw materials

Method used

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  • Method for preparing paper making wet end chemical addition agent by using cassava residue as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Disintegrate the wet cassava slag from the factory, wash and disperse it with clean water, and then sieve to remove the mixture composed of cassava skin and suspended coarse fibers; dehydrate the remaining settled cassava residue and fine fibers and keep them for use as sediment; After the mixture is dried and dispersed, the crude fiber is separated by winnowing; the sediment is mixed with the separated crude fiber, which is the coarsely selected cassava residue;

[0031] (2) After washing the coarsely selected cassava residue, prepare cassava residue slurry with a concentration of 7%. At 30°C, keep stirring while adding sodium hypochlorite with an available chlorine content of 3% and peroxide with a mass concentration of 2.5%. Hydrogen treatment, adding sodium hydroxide to adjust the pH of the slurry to 10, the treatment time is 30min;

[0032] (3) Use dilute hydrochloric acid to neutralize the slurry treated in step (2) to neutrality and wash it. After sieving wit...

Embodiment 2

[0037] (1) Disintegrate the air-dried cassava slag, wash and disperse it with clean water, sieve to remove the cassava skin; sieve to remove the mixture composed of cassava skin and suspended coarse fiber; dehydrate the remaining settled cassava residue and fine fibers Retaining is the sediment; the mixture is dried and dispersed, then winnowed and separated to obtain crude fibers; the sediment is mixed with the separated crude fibers, which is the coarsely selected cassava residue;

[0038] (2) Add the washed cassava residue into warm water to make a cassava slurry with a concentration of 10%. While keeping stirring, add sodium hypochlorite and hydrogen peroxide in turn for treatment. The available chlorine content is 2%, and the concentration of hydrogen peroxide is 3%. , add sodium hydroxide to adjust the pH of the slurry to 11, and the treatment time is 60 minutes;

[0039] (3) Neutralize the slurry with dilute hydrochloric acid until it is neutral, then wash it, sieve it ...

Embodiment 3

[0044] (1) Disintegrate the dried cassava slag, rinse and disperse with clean water, and sieve to remove the cassava skin;

[0045] (2) Add the washed cassava slag to warm water to make a cassava slurry with a concentration of 8%. While keeping stirring, add sodium hypochlorite and hydrogen peroxide in turn for treatment, in which the available chlorine content is 5%, and the concentration of hydrogen peroxide is 4%. , add sodium hydroxide to adjust the pH of the slurry to 9, and the treatment time is 60 minutes;

[0046] (3) Neutralize the slag slurry with dilute hydrochloric acid until it becomes neutral, then wash it, sieve it through 200 meshes, leave the residue, squeeze and dry it, and grind it with a ball mill for 5 hours after drying to obtain refined cassava slag powder;

[0047] (4) Mix and stir 10 g of refined cassava base slag powder and 50 ml of isopropanol evenly, preheat at 50°C for 5 minutes, add 25ml of sodium hydroxide solution with a concentration of 108g / L,...

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Abstract

The invention discloses a method for preparing a paper making wet end chemical addition agent by using cassava residue as a raw material; the method comprises the following steps: the cassava residue is beaten and then is washed and dispersed by clean water; after suspended cassava barks and crude fibers are removed, sedimental cassava residues and fine fibers are dehydrated for standby application, are mixed with the crude fibers obtained through winnowing and separation of the removed cassava barks and the crude fibers and are diluted into slag pulp; then the slag pulp is jointly processed by sodium hypochlorite and hydrogen peroxide; the processed slag pulp is ball-milled into powder; a modified liquid reagent is used for carrying out chemical modification on the powder, a modified synthesis mixture is washed and filtrated by an organic solvent and finally filter cakes are dried and powdered so as to obtain the modified cassava residue product. In the method, the process is simple, devices are matured, and simultaneously as a multiple-effect paper making wet end chemical addition agent, the prepared modified cassava residue product is used for reinforcing paper pulp and helping retention and filtration, has higher economic value and provides a positive approach for effectively solving environmental pollution caused by the abandon of cassava residues.

Description

technical field [0001] The invention belongs to the field of modified starch / cellulose, in particular to a method for extracting starch and cellulose from cassava slag, the leftover material of a cassava starch factory, and modifying them for use as chemical additives in the wet end of papermaking. Background technique [0002] In recent years, with the continuous reduction of the total amount of non-renewable fossil resources such as coal, oil, and natural gas, the development and utilization of new energy has become a hot spot in human research, and as an important form of solar energy, biomass energy is indispensable. Inexhaustible, with the advantages of renewable, low pollution, wide distribution, large reserves, etc., is one of the most potential ways to solve the future energy crisis. [0003] As an important agricultural resource in tropical and subtropical regions, cassava is a part of biomass energy resources. The total output of fresh cassava in the world is 202 m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/10
Inventor 武书彬陶正毅赵媛媛
Owner SOUTH CHINA UNIV OF TECH
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