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Softening agent for papermaking and low-carbon pulping technology

A softener and pulping technology, applied in the field of papermaking and pulping, can solve the problems of less than 50% pulp yield, large investment and low benefit, and achieve the effects of eliminating chemical pollution sources, reducing investment and reducing water consumption.

Active Publication Date: 2015-11-25
于翔
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Second, the pulp yield is low, and the pulp yield per ton of raw material bleached pulp is less than 50%.
[0008] Fifth, the pollution is heavy. In 2012, the national paper industry produced 614.6 billion m of industrial waste gas 3 , 4.688 million tons of smoke dust, 21.68 million tons of industrial solid waste, 3.427 bill

Method used

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  • Softening agent for papermaking and low-carbon pulping technology

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Embodiment Construction

[0067] Below in conjunction with embodiment the present invention will be further described.

[0068] Take cotton stalk as raw material, adopt pulping process of the present invention as figure 1 As shown, the specific process steps are as follows:

[0069] Material preparation: crush the cotton stalks with a hammer mill to obtain crushed materials, the length of which is 15-20mm.

[0070] Softening: Use a screw conveyor to send the crushed material to the silo, add a softener 5 times the weight of the crushed material according to the ratio of material to liquid 1:5, and add a catalyst to react for 20 hours to obtain a softened material. The amount of the catalyst is the mass of the crushed material 1.8%, the formula of softener used is:

[0071] C 3 h 4 o 2 +0.18C 2 h 2 o 4 2H 2 O+0.12HF+3.2H 2 o 2 +Q

[0072] Q is a 4A nanometer molecular sieve, and its mass dosage is 0.12% of the total mass of the softener.

[0073] The formula of catalyst used is:

[0074] 9...

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Abstract

The invention provides a softening agent for papermaking and a low-carbon pulping technology. The softening agent for papermaking pulping is composed of acrylic acid, oxalic acid, aqueous hydrofluoric acid solution, aqueous hydrogen peroxide solution and a 4A nano molecular sieve. According to the softening agent, pulping and bleaching can be completed for one time, sodium hydroxide commonly used in the conventional alkaline pulping process and chlorine or chloride used in the bleaching process can be replaced by the softening agent, subsequent processing technology steps can be reduced, and energy conservation and environment protection are better achieved. Compared with a previous technology, the low-carbon pulping technology has the advantages of being capable of reducing multiple technology steps, simpler and better in processing effect.

Description

technical field [0001] The invention belongs to the technical field of papermaking and pulping, and in particular relates to a softener and a low-carbon pulping process. Background technique [0002] At present, the pulping process in the world has the following problems [0003] First, high energy consumption [0004] The electric energy equivalent of chemical pulp is more than 700 degrees / T pulp; the electric energy equivalent of mechanical pulping is 2000 degrees / T pulp. [0005] Two, the pulp yield is low, and the pulp yield per ton of raw material bleached pulp is less than 50%. [0006] Third, the water consumption is large, and the water consumption per ton of pulp is about 80m 2 [0007] Fourth, the investment is large. The annual investment of 10,000 tons of pulp is about 100 million yuan. [0008] Fifth, the pollution is heavy. In 2012, the national paper industry produced 614.6 billion m of industrial waste gas 3 , 4.688 million tons of smoke dust, 21.68 mil...

Claims

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Application Information

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IPC IPC(8): D21C3/02D21C3/22D21C9/16
CPCD21B1/16D21C1/00D21C9/163D21H11/12
Inventor 卢术林于翔
Owner 于翔
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