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Plant fiber treatment and preparation method for papermaking

A plant fiber and softening enzyme technology, applied in the field of papermaking, can solve the problems of high cost and lack of fiber affinity, and achieve the effects of improving stability, mild conditions and shortening reaction time.

Active Publication Date: 2019-08-27
苏州赛维科环保技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, chemical modification and adding yellowing inhibitors are often used to suppress the yellowing of pulp, but these methods are expensive and have no affinity with fibers, so they cannot solve this problem from the root.

Method used

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  • Plant fiber treatment and preparation method for papermaking
  • Plant fiber treatment and preparation method for papermaking
  • Plant fiber treatment and preparation method for papermaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step a0, plant fiber opening: placing the wood chips in a grinder, and grinding them until the wood chips with a particle size not greater than 5 cm account for 80% of all the wood chips;

[0033] Step a, softening with plant fiber softening enzyme: mix industrial pancreatin with a concentration of 25U / g and fiber-opened wood chips at a feeding ratio of 100g / t at a temperature of 50°C and a pH value of 9.0, and then add them to the storage In the tank, the reaction time in the storage tank is 2 hours, and the aeration device arranged at the bottom of the storage tank disturbs the softening enzyme, and the aeration rate is 2 times / min;

[0034] Step b, plant fiber purification: add water to the softened plant fiber reacted in the storage tank, centrifuge to obtain the supernatant, concentrate, the concentration temperature is 80°C, repeat the above centrifugation and concentration steps 3 times; the last obtained The supernatant is mixed with ethanol and left to stand to...

Embodiment 2

[0037]Step a0, plant fiber opening: placing the wood chips in a grinder, and grinding them until the wood chips with a particle size not greater than 5 cm account for 80% of all the wood chips;

[0038] Step a, plant fiber softening enzyme softening: mix the microbial protease with a concentration of 25U / g and the fiber-opened wood chips at a feeding ratio of 100g / t at a temperature of 50°C and a pH value of 5.0, and then add them to the storage tank Among them, the reaction time in the storage tank is 2 hours, and the aeration device arranged at the bottom of the storage tank disturbs the softening enzyme, and the aeration rate is 2 times / min;

[0039] Step b, plant fiber purification: add water to the softened plant fiber reacted in the storage tank, centrifuge to obtain the supernatant, concentrate, the concentration temperature is 80°C, repeat the above centrifugation and concentration steps 3 times; the last obtained The supernatant is mixed with ethanol and left to stand...

Embodiment 3

[0042] Step a0, plant fiber opening: placing the wood chips in a grinder, and grinding them until the wood chips with a particle size not greater than 5 cm account for 80% of all the wood chips;

[0043] Step a, plant fiber softening enzyme softening: mix the compound enzyme with a concentration of 25U / g and the fiber-opened wood chips according to the feeding ratio of 100g / t at a temperature of 50°C and a pH value of 6.0, and then add them to the storage tank Among them, the reaction time in the storage tank is 2 hours, and the aeration device arranged at the bottom of the storage tank disturbs the softening enzyme, and the aeration rate is 2 times / min;

[0044] Step b, plant fiber purification: add water to the softened plant fiber reacted in the storage tank, centrifuge to obtain the supernatant, concentrate, the concentration temperature is 80°C, repeat the above centrifugation and concentration steps 3 times; the last obtained The supernatant is mixed with ethanol and lef...

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Abstract

The invention belongs to the technical field of papermaking, and particularly relates to a plant fiber treatment and preparation method for papermaking. The method includes the following steps of plant-fiber opening, plant-fiber softening with a softening enzyme, plant-fiber purification, purified plant-fiber crushing, chemical softening, lignin removal and other related operation steps, wherein plant fiber includes wood chips or bamboo chips or straw or bagasse, and the softening enzymes includes industrial trypsin, microbial protease and compound enzyme. The plant fiber treatment and preparation method for papermaking changes the method, including mechanical crushing and hydrothermal treatment or chemical soaking, of the prior art, enzymolysis, softening and mechanical crushing are performed in sequence, the use amount of alkali, hydrogen peroxide and the like in the chemical treatment process is reduced, the grinding energy consumption and the grinding electricity consumption are reduced, splitting and fibrillating are easy to occur at the time of plant fiber grinding, the strength of obtained pulp is improved, the paper strength is increased, the whiteness of paper pulp is improved and yellowing is inhibited.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a preparation method of plant fiber treatment for papermaking. Background technique [0002] With the development and progress of society and the improvement of people's living standards, consumers' requirements for paper products are also constantly improving. Household paper requires high strength, high bulk, and good water absorption; high-grade printing paper such as Gordon coated paper and white cardboard requires high tensile strength, stiffness and bursting strength. However, these physical indicators are mutually restricted due to the differences in existing equipment and technological conditions in most paper mills. For example, the improvement of bulk is mainly achieved by hot air drying. The technology and process are very mature, but the energy consumption is very high. Chemicals such as dry strength agent, wet strength agent, and stiffness agent must...

Claims

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Application Information

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IPC IPC(8): D21D1/20D21C5/00
CPCD21C5/00D21C5/005D21D1/20
Inventor 邱振权
Owner 苏州赛维科环保技术服务有限公司
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