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Method for hybrid giant napier producing in oxygen free radical doffing/bleaching integrated reactor with dried bananas stalk

A technology of dried banana stems and free radicals, applied in pulp beating/refining method, bleaching agent addition, pretreatment with oxygen-generating compounds, etc., can solve the problems of low yield, large consumption of chemicals, environmental pollution, etc.

Inactive Publication Date: 2007-10-31
BEIJING GUOLIYUAN POLYMER SCI & TECH R & D CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] As we all know, apart from the shortage of raw materials, there are many serious problems facing the pulp and paper industry in the world today, such as chemical pulping: large consumption of chemicals, large investment, low yield, difficult wastewater treatment, serious environmental pollution, etc. ;Mechanical pulping: high energy consumption, poor pulp strength, etc.

Method used

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  • Method for hybrid giant napier producing in oxygen free radical doffing/bleaching integrated reactor with dried bananas stalk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A method for producing bleached pulp in an oxygen free radical removal / bleaching integrated reaction kettle for dry banana stems, comprising the following steps:

[0054] The dry banana stems sent from the material preparation section are sent to the material preparation room by the conveyor belt for pretreatment; washed and dehydrated with 60 ° C deionized water; the slurry is input into the oxidation reaction kettle with a screw conveyor, the model is M-O·P-II, and the concentration is added. 0.1% dimethyl sulfoxide; start the rotating electron accelerator and electric stirrer, the stirring speed is 1m / s, and the softening material stabilizes at 130°C; after opening the nitrogen gas for 3 minutes, open the pre-prepared composite oxygen pressure valve , under 0.6MPa oxygen pressure, adding concentration is 0.01% magnesium sulfate, 0.12% sodium silicate and concentration is 0.45% (H 2 o 2 ) cellulose hydrogen peroxide protective agent, 0.01% ethylenediaminetetraacetic ...

Embodiment 2

[0056] Same as Example 1, the difference is that the raw material is plantain fiber, 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 stable temperature of the softened material is 140°C; Add concentration of 0.06% ferric oxide and 0.4% hydrogen peroxide (H 2 o 2 ) cellulose protective agent, a sodium polyphosphate oxygen stabilizer with a concentration of 0.3%, and a sodium percarbonate oxygen stabilizer with a concentration of 0.4%; react for 60min, and the pH value is 4; use a pulp washer in 80°C deionized water The pulp is repeatedly washed two to three times, dehydrated and left to stand, and stored in deionized water containing 0.01% N,N-dibenzylhydroxylamine to obtain a pulp with a pulp yield of 70% and a whiteness of 77.8% ISO.

Embodiment 3

[0058]Same as Example 1, the difference is that the raw material is pineapple fiber, 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 stable temperature of the softened material is 120°C; Add concentration of 0.02% ferric oxide and 0.38% hydrogen peroxide (H 2 o 2 ) cellulose protective agent, sodium polyphosphate oxygen stabilizer with a concentration of 0.25%, and sodium percarbonate oxygen stabilizer with a concentration of 0.45%; react for 60 minutes, and have a pH value of 4.5; use a pulp washer in 80°C 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 68% and a whiteness of 76.5% ISO.

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Abstract

The invention discloses a method for generating poach paper slurry in an oxygen free radical remove / poach reaction kettle via dry banana stems, 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 tropical plant as tropical plant 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): D21C3/22D21C1/08D21H21/32D21H17/63D21H17/12D21D1/30D21C11/00
Inventor 梅秀泉许越先王高升
Owner BEIJING GUOLIYUAN POLYMER SCI & TECH R & D CENT
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