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Oxidation method prepared whole-cotton stalk newspaper pulp and its preparation method

Inactive Publication Date: 2006-12-27
梅秀泉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, 54% of paper mills in the world turn their attention to chlorine dioxide as a bleaching agent, but 91% of chlorine dioxide is combined with dioxane compounds and other organic compounds, and the remaining 9% of chlorine gas emissions are still harmful to human living environment

Method used

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  • Oxidation method prepared whole-cotton stalk newspaper pulp and its preparation method
  • Oxidation method prepared whole-cotton stalk newspaper pulp and its preparation method
  • Oxidation method prepared whole-cotton stalk newspaper pulp and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 100kg of cotton stalks are removed with pods and calyx by cracking machine, cut into 10cm long and 1.5cm thick material, after cracking with hammer chip cracker, dust is removed by wind, pith core is removed, impurities are sieved, washed with circulating water, and input into belt In the immersion tank with an automatic stirrer, the temperature of the immersion tank is 50-80°C, the pH value of the water in the pool is 2.5, add 0.01kg of magnesium carbonate and 0.1kg of dimethyldioxirane (DMD), and the stirring speed is 60 / min , add H after 1h 2 o 2 Solution, control the concentration at about 0.2%, add a stirrer to accelerate 80 / min, pH=5.5, temperature 80°C, after 1.5 hours, observe that the material in the pool is soaked and the softness rate reaches 98%, and the material in the pool changes from dark yellow to light White, whiteness 48-52°, the material is washed repeatedly, squeezed dry and concentrated, the water content is 30%, and the washed material is added d...

Embodiment 2

[0050] With the original coarse slurry 100kg in the embodiment one, the screw feeder is evenly and continuously sent into the mill, the first time of fine grinding, in the fine grinding process, drop the prepared 0.4% H 2 o 2 , dripping amount and slurry ratio 1:0.12, mixed grinding with slurry, mill speed 1300 / min, mill gap adjusted to 0.20mm, temperature 60°C, slurry concentration up to 30%, pH value 2.5, slurry flow The speed is 1.5-2h, the whiteness of the pulp is observed to be 76-86°, the feeder feeds the finely refined pulp into the refiner, the speed is 1300 / min, the gap between the mills is adjusted to 0.20mm, the pulp concentration is 35%, and the feeding is about 10umol / L ozone and 0.02umol / L horseradish peroxidase, the acting pressure is 0.6MPa, mixed with the slurry for 0.5-1h, the pH value is 2.5, the slurry concentration is 35%, the temperature is 80°C, and the whiteness should be equal. 85°, enter the conventional fine screening, purification, cylinder thicken...

Embodiment 3

[0053] Repeat Example 1 to obtain the original coarse pulp.

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Abstract

The invention discloses a full-cotton stalk news pulp and preparing method through full-sealing, non-polluting, self-circulating and zero-discharge oxidizing method, which is characterized by the following: utilizing electron reducing reaction in the ion reaction of oxygen molecular to produce free radical of active oxygen to transmit and separate lignin; making chromogenic gene change in the plant cell interlayer to obtain pulp. The invention changes chemical pulping technology without polluting acid, alkaline and anthraquinone, which saves boiling and bleaching procedures.

Description

field of invention [0001] The invention relates to a kind of newsprint pulp made from cotton stalks by an oxidation process and a preparation method thereof, more specifically to a fully enclosed self-circulation without acid, alkali, chlorine, anthraquinone, no cooking, no bleaching, zero discharge, no anthraquinone. Pollution of green pulping methods. Background of the invention [0002] Today's long-term shortage of papermaking raw materials does not refer to a certain region but to the global papermaking industry. Forests are the lungs of life on earth. In addition to conserving water sources, preventing soil erosion, and regulating climate, forests can also absorb carbon dioxide and release oxygen. Forests not only have ecological value but also economic value. However, the world is currently trading at 700×10 8 m 2 The speed decreases, and the tropical rainforest is 50×10 per minute 4 m 2 If the deforestation continues without strict control, 40 years later, the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/00
Inventor 梅秀泉谢来苏
Owner 梅秀泉
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