A kind of method that utilizes old newsprint to prepare recycled newsprint

A newsprint and re-adding technology, which is applied in the field of papermaking, can solve problems such as environmental pollution and poor quality of newsprint, and achieve the effects of reducing impurity components, improving deinking effect, and reducing environmental pollution

Active Publication Date: 2019-10-22
珠海东杰科技有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing recycled newsprint from old newsprint in view of the problems that all current recycled newsprint processes not only pollute the environment, but also the quality of newsprint is not good

Method used

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  • A kind of method that utilizes old newsprint to prepare recycled newsprint

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preparation example Construction

[0023] The preparation method of deinking bacteria liquid:

[0024] A. According to the mass ratio of 1:5~7, mix paper mill wastewater sludge and sterile water, and stir evenly at 100~200r / min, let it stand for 1~2h, take the supernatant, and In total, take 70~80 parts of water, 10~15 parts of hydroxymethylcellulose sodium, 5~8 parts of ammonium sulfate, 1~2 parts of yeast extract, 1~2 parts of potassium dihydrogen phosphate, 1~2 parts of dihydrogen phosphate Sodium, 0.5~1 part of sodium chloride, 0.2~0.4 part of magnesium sulfate are mixed evenly, and then sterilized at high temperature to obtain a liquid medium. According to the mass ratio of 0.1:20~30, the supernatant and the liquid medium are mixed, and the Shake culture at 28-30°C and 150-180r / min for 2-3 days to obtain culture solution;

[0025] B. In parts by weight, take 70~80 parts of water, 10~15 parts of soluble starch, 5~8 parts of ammonium sulfate, 1~2 parts of yeast extract, 1~2 parts of potassium dihydrogen pho...

Embodiment 1

[0038] The preparation method of deinking bacteria liquid:

[0039] A. According to the mass ratio of 1:5, mix paper mill wastewater sludge and sterile water, and stir evenly at 100r / min, let it stand for 1h, take the supernatant, and take 70 parts of water by weight , 10 parts of sodium hydroxymethyl cellulose, 5 parts of ammonium sulfate, 1 part of yeast extract, 1 part of potassium dihydrogen phosphate, 1 part of disodium hydrogen phosphate, 0.5 parts of sodium chloride, 0.2 parts of magnesium sulfate, mix well, and extinguish at high temperature Bacteria, to obtain a liquid medium, according to the mass ratio of 0.1:20, the supernatant and the liquid medium were mixed, and the temperature was 28°C, 150r / min. Shaking culture was carried out for 2 days to obtain a culture medium;

[0040] B. In parts by weight, take 70 parts of water, 10 parts of soluble starch, 5 parts of ammonium sulfate, 1 part of yeast extract, 1 part of potassium dihydrogen phosphate, 1 part of disodium...

Embodiment 2

[0053] The preparation method of deinking bacteria liquid:

[0054] A. According to the mass ratio of 1:7, mix paper mill wastewater sludge and sterile water, and stir evenly at 200r / min, let it stand for 2 hours, take the supernatant, and take 80 parts of water by weight , 15 parts of sodium hydroxymethyl cellulose, 8 parts of ammonium sulfate, 2 parts of yeast extract, 2 parts of potassium dihydrogen phosphate, 2 parts of disodium hydrogen phosphate, 1 part of sodium chloride, 0.4 parts of magnesium sulfate, mix well, and extinguish at high temperature Bacteria, to obtain a liquid medium, according to the mass ratio of 0.1:30, the supernatant and the liquid medium were mixed, and the temperature was 30°C, 180r / min. Shaking culture was carried out for 3 days to obtain a culture medium;

[0055] B. In parts by weight, take 80 parts of water, 15 parts of soluble starch, 8 parts of ammonium sulfate, 2 parts of yeast extract, 2 parts of potassium dihydrogen phosphate, 2 parts of ...

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Abstract

The invention belongs to the field of papermaking and discloses a method for preparing recycled newsprint from old newsprint. A modified filler material is further prepared by taking calcium carbonateas a raw material, taking chitosan, octadecanoic acid and sodium hydroxide as coating agents and taking calcium chloride as a cross-linking agent. The surface of calcium carbonate can be well coatedwith a cross-linking agent of cationic chitosan and softened to completely combine with fibers, and accordingly binding force between modified calcium carbonate and the fibers can be enhanced, the retention rate of filler calcium carbonate is increased, newsprint production cost can be reduced, and environment pollution load can be reduced. Problems of poor newsprint quality and environment pollution caused by all existing recycled newsprint processes are solved.

Description

technical field [0001] The invention belongs to the field of papermaking, and in particular relates to a method for preparing recycled newsprint from old newsprint. Background technique [0002] With the rapid development of China's economy and the continuous improvement of people's living standards, people's requirements for cultural life are also getting higher and higher, which also promotes the vigorous development of my country's journalism. Various newspapers, magazines, advertisements, and newsprint demand With continuous improvement, printed publications with newsprint as the carrier are products with a very high reading frequency in people's daily life, and the social demand for newsprint is great. Newsprint, commonly known as white newspaper, is mainly used for printing newspapers and magazines. The paper is soft, generally without sizing, and has greater absorption properties to ensure that the ink is quickly fixed on the blot. [0003] Judging from the existing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/32D21B1/36D21H17/67
CPCD21B1/325D21B1/36D21H17/67Y02W30/64
Inventor 龙海燕乔舍程依
Owner 珠海东杰科技有限公司
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