Method for making paper-pulp by cold immersion for paper-making

A technology of cold soaking and pulp, applied in the field of papermaking, can solve the problems of increased paper cost, laid-off workers, and lack of livelihood, and achieve the effects of less pollutants, water saving and less water consumption.

Inactive Publication Date: 2009-07-08
WUYUAN DAMINCAI PAPER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the state closed tens of thousands of small and medium-sized paper mills, resulting in a large number of laid-off workers and no livelihood.
In order to maintain their survival, pulp and paper companies need to spend a lot of money on alkali recovery, but the cost is huge, which greatly increases the cost of paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Twist 4 tons of wheat straw, the raw material for papermaking, into silk so that the length of the silk is 1-5 cm, and the diameter of the silk is 0.1-0.2 cm.

[0047] (2) Prepare 40 kilograms of active agents respectively: wherein: 2.4 kilograms of 2-octyl alcohol polyoxyethylene ether, oxidized polyethylene emulsion: 2.4 kilograms, ethanol: 0.4 kilograms, sodium dodecylbenzene sulfonate: 0.4 kilograms, sodium percarbonate : 0.8 kilograms, alkaline protease: 0.4 kilograms, talcum powder: 33.2 kilograms, above-mentioned raw materials are mixed, grind, and make particle size be 200 orders;

[0048] Prepare soaking main liquid 8073.6 kilograms: wherein, water: 8000 kilograms, calcium hydroxide: 64 kilograms, anthraquinone: 0.8 kilograms, sodium percarbonate: 0.8 kilograms, sodium dodecylbenzene sulfonate: 4 kilograms, anhydrous sodium sulfite: 4 kg, mix the above raw materials, react for 2 hours, set aside;

[0049] Prepare 4008 kg of soaking auxiliary liquid, wherei...

Embodiment 2

[0055] (1) Twist 4 tons of reed, the raw material for papermaking, into silk so that the length of the silk is 1-5 cm, and the diameter of the silk is 0.1-0.2 cm.

[0056] (2) Prepare 40 kilograms of active agents respectively: wherein: 3.6 kilograms of 2-octyl alcohol polyoxyethylene ether, oxidized polyethylene emulsion: 3.6 kilograms, ethanol: 1.24 kilograms, sodium dodecylbenzene sulfonate: 1.2 kilograms, sodium percarbonate : 1.6 kilograms, alkaline protease: 0.8 kilograms, talcum powder: 28 kilograms, the above-mentioned raw materials are mixed, grind, and make particle size be 150 orders;

[0057] Prepare soaking main liquid 8108.8 kilograms: Among them, water: 8000 kilograms, calcium hydroxide: 80 kilograms, anthraquinone: 6.4 kilograms, sodium percarbonate: 6.4 kilograms, sodium dodecylbenzene sulfonate: 8 kilograms, anhydrous sodium sulfite: 8 kg, mix the above raw materials, react for 2 hours, set aside;

[0058] Prepare 4014 kg of soaking auxiliary liquid, wherein...

Embodiment 3

[0064] (1) Twist 4 tons of fast-growing poplar wood, the raw material for papermaking, into silk so that the length of the silk is 1-5 cm, and the diameter of the silk is 0.1-0.2 cm.

[0065] (2) Prepare 40 kilograms of active agents respectively: wherein: 4.8 kilograms of 2-octyl alcohol polyoxyethylene ether, oxidized polyethylene emulsion: 4.8 kilograms, ethanol: 2 kilograms, sodium dodecylbenzene sulfonate: 2 kilograms, sodium percarbonate : 3 kilograms, alkaline protease: 1.2 kilograms, talcum powder: 18.2 kilograms, above-mentioned raw materials are mixed, grind, and make particle size be 150 orders;

[0066] Prepare 8144 kg of soaking main liquid: wherein, water: 8000 kg, calcium hydroxide: 96 kg, anthraquinone: 8 kg, sodium percarbonate: 8 kg, sodium dodecylbenzenesulfonate: 16 kg, anhydrous sodium sulfite: 16 kg, mix the above raw materials, react for 2 hours, set aside;

[0067] Prepare 4028 kg of soaking auxiliary liquid, wherein, water: 4000 kg, alkaline protease:...

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Abstract

The invention relates to a method for making pulp by cold soaking for papermaking, and belongs to the technical field of papermaking. Firstly, the raw materials used for papermaking are twisted into fiber filaments; the active agent, soaking main liquid and soaking auxiliary liquid are prepared separately, and the active agent is put into the mixed liquid of soaking main liquid and soaking auxiliary liquid to obtain the soaking liquid; Soak in liquid at room temperature for 36-72 hours; grind and beat the soaked pulp to make the pulp hardness 12-18. The pulping process of the method does not use alkali, does not need a large amount of water washing, avoids the discharge of sewage, and greatly saves water. Compared with the strong alkali method, its pulp yield can be increased by 20%. The pulp produced by the method of the invention has wide sources of raw materials, less water and coal consumption, low papermaking cost, and the prepared pulp can be used to manufacture box board paper and high-strength corrugated paper.

Description

technical field [0001] The invention relates to a method for making pulp by cold soaking for papermaking, and belongs to the technical field of papermaking. Background technique [0002] The traditional papermaking technology uses strong alkali to extract lignin and other impurities in plant fibers. The principle is peeling reaction, that is, strong alkali extracts lignin and other impurities in plant fibers to saponify the fibers into pulp to achieve papermaking. paper requirements. However, the strong alkali used in the traditional process destroys the short fibers, thus reducing the pulp yield and causing serious environmental pollution. This has caused serious problems in the paper industry. On the land of China, there is even no water and no pollution, no rivers and no pollution, which has directly endangered the living environment of human beings. For this reason, the state closed tens of thousands of small and medium-sized paper mills, resulting in a large number of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/02D21H17/36D21H17/06D21H17/14D21H17/66D21H17/22D21H17/67D21H17/05
Inventor 夏思泉高立明
Owner WUYUAN DAMINCAI PAPER IND
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