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Method for making paper pulp by using hydrogen peroxide and alkali substance reaction together

A technology of hydrogen peroxide and alkaline substances, applied in pulping with inorganic alkali, pretreatment with alkaline compounds, pulp bleaching, etc., can solve problems such as polluting the environment, affecting the development of the paper industry, and complex processes

Inactive Publication Date: 2009-07-01
张承绍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current method of using straw to produce straw pulp has the disadvantages of producing a large amount of black liquor and black water, seriously polluting the environment, complicated process, and large investment, which seriously restricts the use of straw, rice straw, corn stalks and other straws to produce straw pulp. Straw pulp, affecting the industrial development of papermaking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: Get 1000Kg of wheat straw, grind it to below 3 cm, put it into a container with a stirring device, add 150 to 300 kg of caustic soda solution with a concentration of 30%, and stir it so that the wheat straw is soaked evenly and fully reacted to generate alkali Then slowly add 200-400Kg of hydrogen peroxide solution with a concentration of 27.5%, start the stirring device at the same time, stir, make the hydrogen peroxide and the alkaline substance fully react, and generate a large amount of heat, so that the reaction temperature is controlled at Straw pulp can be produced at 70-100°C. The prepared straw pulp is cooled, ground, beaten and washed to remove lignin, which can meet the production requirements of paper. And there is no black liquor and black water discharge, and the generated wastewater does not contain toxic substances, and can be recycled with only a little treatment.

Embodiment 2

[0013] Embodiment 2: Get straw 1000Kg, grind to below 3Cm, put into the container with stirring device, add 150~300Kg of 30% caustic soda solution, stir, make wheat straw soak uniformly, then add 27.5% hydrogen peroxide The solution is 200-400Kg, then start the stirring device, stir, and fully react to generate alkaline substances; make hydrogen peroxide fully react with alkaline substances, and generate a lot of heat, so that the reaction temperature is controlled at 70-100°C, which is convenient Grass pulp can be made. After the straw pulp is cooled, it is ground, beaten and washed to remove lignin, which can also meet the production requirements of paper.

Embodiment 3

[0014] Embodiment 3: Get 1000kg of corn stalks, grind it to below 3Cm, put it into a container with a stirring device, add 200-300Kg of 30% caustic soda solution, stir, make the wheat straw soak evenly, then add 27.5% peroxide Hydrogen solution 250-350Kg, start the stirring device again, stir, and fully react to generate alkaline substances; make hydrogen peroxide fully react with alkaline substances, and generate a large amount of heat, so that the reaction temperature is controlled at 70-95°C ( Except in winter, the heat generated during the reaction can basically reach the above temperature, and it can be properly heated in winter), and straw pulp can be produced. After the straw pulp is cooled, it is ground, beaten and washed to remove lignin, which can also meet the production requirements of paper.

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Abstract

The invention relates to a method for preparing paper pulp by using straws, which uses hydrogen peroxide to react violently with alkaline substances and release heat energy to prepare paper pulp. Crush wheat straw, rice straw, corn and other stalks, add caustic soda solution and stir to generate alkaline substances; then add hydrogen peroxide and stir to make hydrogen peroxide and alkaline substances decompose violently Fully decompose and separate the fiber and lignin, and then grind, beat and wash to remove the lignin, and then produce straw pulp for papermaking. The weight ratio of straw, caustic soda and hydrogen peroxide is: straw: caustic soda: hydrogen peroxide = 1: 0.03-0.12: 0.04-0.13; the reaction temperature is controlled at 70-100°C. If additives are added, the effect will be better. The whole process is simple, easy to operate, no black liquor and black water discharge, no pollution to the environment, the discharged water can be recycled after a little treatment, less water, electricity, coal, and energy are saved.

Description

technical field [0001] The invention is a method for preparing paper pulp by using wheat straw, rice straw, corn stalk, reed stalk and other stalks as raw materials, and utilizing the principle of violent reaction between hydrogen peroxide and alkaline substances. Background technique [0002] At present, there are mainly two kinds of pulp used in papermaking, wood pulp and straw pulp. Wood pulp papermaking consumes a lot of wood. my country is a country with scarce forest resources, and wood resources are in short supply. However, there are a large amount of wheat straw, rice straw, corn stalks, etc. in rural areas. Except a small amount is used, most of them are burned, causing great waste and seriously polluting the environment. Utilize the stalks such as wheat straw, rice straw, corn stalk, reed stalk to produce straw pulp, has been paid attention to by my country. However, the current method of using straw to produce straw pulp has the disadvantages of producing a larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/22D21B1/04D21C1/06D21C3/02D21C9/16
Inventor 张承绍
Owner 张承绍
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