Method for hybrid giant napier producing in oxygen free radical doffing/bleaching integrated reactor with albefaction paper stuff

A technology of free radicals and imperial bamboo grass, applied in the direction of pretreatment with oxygen-generating compounds, paper and paper making, etc., can solve the problems of affecting the cost of raw materials, increasing demand, and increasing imports of wood pulp and waste paper.

Inactive Publication Date: 2007-10-31
BEIJING GUOLIYUAN POLYMER SCI & TECH R & D CENT
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  • Abstract
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Problems solved by technology

At the same time, my country's paper industry has adjusted its product structure. The proportion of medium and high-end products has continued to increase, the demand for wood pulp and waste paper has increased, and the increase in imports of wood pulp and waste paper has increased the pressure on the supply of raw materials. Stimulate the rise of raw material prices in the international market, affecting the raw material costs of domestic paper-making enterprises

Method used

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  • Method for hybrid giant napier producing in oxygen free radical doffing/bleaching integrated reactor with albefaction paper stuff

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A method for producing bleached pulp in an oxygen free radical de- / bleaching integrated reaction kettle comprising the following steps:

[0047] The thick fibers (tips) of the royal bamboo grass sent by the material preparation section are sent to the material preparation room by the conveyor belt for pretreatment; they are washed and dehydrated with 60°C deionized water; the slurry is fed into the oxidation reaction kettle with a screw conveyor, the model is M-O·P- Type II, and add dimethyl sulfoxide with a concentration of 0.1%; start the rotating electron accelerator and electric stirrer, the stirring speed is 1m / s, and the softening material has a stable temperature of 150°C; after opening the nitrogen gas for 3 minutes, the pre-prepared The composite oxygen pressure valve is opened, and under 0.6MPa oxygen pressure, it is 0.1% magnesium sulfate, 0.2% sodium silicate and 0.5% (H 2 o 2 ) cellulose hydrogen peroxide protective agent, 0.01% ethylenediaminetetraacetic ...

Embodiment 2

[0049] Same as Example 1, the difference is that the raw material is bamboo thick fiber (stalk), and the oxidation reactor model is M-O P-III type; it is washed and dehydrated with 80°C deionized water; the stirring speed is 0.8m / s; the softened material is stable The temperature is 170°C; 0.01% ferric oxide and 0.4% hydrogen peroxide (H 2 o 2 ) cellulose protective agent, a concentration of 0.5% sodium polyphosphate oxygen stabilizer, a concentration of 0.6% sodium peroxycarbonate oxygen stabilizer; reaction 60min, pH value is 4.5; use pulp washer in 80 ℃ deionized water The pulp is repeatedly washed two to three times, dehydrated and left standing, and stored in deionized water containing 0.01% N,N-dibenzylhydroxylamine to obtain a pulp with a pulp yield of 74% and a whiteness of 75.5% ISO.

Embodiment 3

[0051] The same as Example 1, the difference is that the raw material is the mixed crude fiber (tip + stalk) of the royal bamboo grass, and the oxidation reactor model is M-O·P-III type; it is washed and dehydrated with 70°C deionized water; the stirring speed is 0.8m / s; softening material stable temperature is at 165 ℃; Add concentration under 0.8Mpa oxygen pressure and be 0.1% MetSulphate, 0.2% sodium silicate and 0.5% hydrogen peroxide (H 2 o 2) cellulose protective agent, dimethyl sulfoxide oxygen stabilizer with a concentration of 0.3%; react for 45 minutes, and the pH value is 3.8; use a pulp washer to repeatedly wash the pulp in 70°C deionized water for two to three times, dehydrate and stand still, and Containing 0.01% N, N-dibenzylhydroxylamine and storing in deionized water, a slurry with a yield of 75% and a whiteness of 76% ISO can be obtained.

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Abstract

The invention discloses a method for producing poach paper slurry in an oxygen free radical remove/poach reaction kettle via bamboo grass, comprising that rotating an electric accelerator in the kettle to transmit electrons in an organic solution, to supply the electrons to basic oxygen, to generate the ultra-oxygen anion free radical (O2-./HOO.) in the oxidization reaction kettle to transform and separate lignin, to change the color group of the plant cell layer, to obtain slurry. The invention can be applied on hard plants as bamboo, reed or the like. The invention completely changes the chemical slurry technique with serious pollutions as acid, alkali or the like, which avoids recycling alkali to save cost, and avoids boiling process and poaching tower with serious pollution, to utilize abundant resource, save water and reduce cost.

Description

technical field [0001] The invention relates to the fields of pulping and papermaking technology, oxygen free radical biology, electrochemistry, resource environment and the like. Background technique [0002] The paper industry is a basic raw material industry that is not significantly affected by the economic cycle. Although it is affected by the continued high prices of energy and transportation costs and the recent bank interest rate hike, the rapid growth momentum of the paper industry will not change. The main reason is that there is a huge gap in my country's paper industry market. At present, my country's per capita consumption of paper products is less than 33 kg, which is far lower than the world's per capita consumption of 52 kg. According to experts' prediction, it will reach about 70 million tons by 2010, and the gap between output and demand is expected to be more than 10 million tons. However, the huge market is in stark contrast to my country's backward pape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C1/08D21C3/00D21H17/63D21H17/12
Inventor 梅秀泉王高升赵志爽孙立丽田海燕
Owner BEIJING GUOLIYUAN POLYMER SCI & TECH R & D CENT
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