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Paper pulp prepared from corn stalks and preparation method of paper pulp

A technology of corn stalks and corn stalks, applied in pulp bleaching, pulping with inorganic alkali, pulping of cellulose raw materials, etc., can solve the problems of no more detailed instructions, difficulties in removing leaves and pith, and storage, and achieve High thickness, low energy consumption and low cost

Active Publication Date: 2014-02-12
黑龙江泉林生态农业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, in view of the problems of difficult storage and difficult removal of leaves and pith in the above-mentioned prior art, there is no more detailed explanation in the prior art on how to use the whole corn stalks to prepare pulp that meets the requirements. In view of this, this paper is hereby proposed invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Crush the corn stalks to 2-2.5cm, add the crushed corn stalks to cornmeal with a weight of 0.5% of the corn stalks, add water to adjust the water content of the corn stalks to 65%, mix well, and place the processed corn stalks in the storage cellar In the medium, flattened and compacted and sealed to form anaerobic conditions, yellow storage for 30 days, pH is 3, water content is 60%.

[0074] The raw material of corn stalks for yellow storage is prepared and loaded into a spherical digester, and cooked by caustic soda-anthraquinone method. Add the cooking liquid into the spherical digester, the amount of alkali used is 10% of the absolute dry raw material in terms of sodium hydroxide, the amount of anthraquinone added is 0.08% of the absolute dry raw material, and the liquid ratio is 1:4. The tube-and-tube heat exchanger indirectly heats the cooking liquid, heats up to 120°C, and keeps it warm for 30 minutes to obtain a coarse pulp with a hardness of potassium permanga...

Embodiment 2

[0078] Crush the corn stalks to 2-2.5cm, add the crushed corn stalks to corn flour with a weight of 0.6% of the corn stalks, add water to adjust the water content of the corn stalks to 70%, mix well, and put the processed corn stalks in the storage cellar In the medium, it was flattened and compacted and sealed to form anaerobic conditions. The yellow was stored for 35 days, with a pH of 4 and a water content of 65%.

[0079] The raw material of corn stalks for yellow storage is prepared and loaded into a spherical digester, and cooked by caustic soda-anthraquinone method. Add the cooking liquid into the spherical digester, the amount of alkali used is 16% of the absolute dry raw material in terms of sodium hydroxide, the amount of anthraquinone added is 0.08% of the absolute dry raw material, and the liquid ratio is 1:2.8. The tube-and-tube heat exchanger indirectly heats the cooking liquid, and heats up to 140°C to obtain a coarse pulp with a hardness of potassium permangana...

Embodiment 3

[0083] Crush the corn stalks to 2-2.5cm, add the crushed corn stalks to cornmeal with a weight of 0.7% of the corn stalks, add water to adjust the water content of the corn stalks to 66%, mix well, and place the processed corn stalks in the storage cellar In the medium, it was flattened and compacted and sealed to form anaerobic conditions. It was stored for 33 days, with a pH of 4 and a water content of 57%.

[0084] The raw material of corn stalks for yellow storage is prepared and loaded into a spherical digester, and the ammonium method is adopted. Add the cooking liquid into the spherical digester, the amount of ammonium sulfite is 14% of the absolute dry raw material, and the liquid ratio is 1:2.8; heat it with steam, heat it up to 175°C, and keep it for 40 minutes, and the hardness is high. Coarse pulp with a potassium manganate value of 16. Black liquor extraction and pulp washing were carried out on the coarse pulp to obtain a washed pulp with a concentration of 8%, ...

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Abstract

The invention belongs to the field of papermaking, and in particular relates to a paper pulp prepared from corn stalks and a preparation method of the paper pump. The preparation method of the corn stalk paper pulp comprises the steps of crushing, yellow corn silage fermentation, stewing, black liquid extraction and after-treatment. According to the corn stalk paper pulp prepared by the preparation method disclosed by the invention, yellow corn silage stalks are used as raw materials, the pulp whiteness is 35-65% of ISO, the loose depth is 1.50-3.15cm<3> / g, the folding strength is 0-50 times, the breaking length is 1.0-7.5km, the tear strength index is 2.0-5.2mN.m<2> / g, and the ash content is 2-10%. The strength parameter of the corn stalk paper pulp provided by the invention can compete with that of hardwood pulp, so that the corn stalk paper pulp is a high-grade paper pulp and can be prepared into high-grade paper for cultural use and daily use.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a pulp prepared from corn stalks and a preparation method thereof. Background technique [0002] Due to the increasing shortage of wood resources in the world, it has become the goal pursued by various paper-making enterprises to produce pulp and paper without destroying forests and the environment. As a solution to this problem, the technology of making pulp from non-wood plant fibers using annual or biennial plants such as: farmland waste, bamboo, bagasse discarded after sugar production, rice straw, etc. as the main material has been attracting attention. [0003] Although the pulping of various annual or biennial plants has been studied in the prior art, and non-wood fiber pulps with good properties have been obtained, it is generally considered that the content of cellulose in corn stover is too low, for example, cellulose in wheat straw The content of cellulose is about 40%, whi...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21C5/00D21C3/02D21C3/22D21C9/02D21C9/10D21C9/16
Inventor 宋明信陈松涛李洪法毕衍金闫俊钦赵淑晶
Owner 黑龙江泉林生态农业有限公司
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