Biocatalytic clean pulping agent and application process thereof

A technology of clean pulping and catalysis, applied in the regeneration of pulping liquid, pulping of cellulose raw materials, pulp bleaching, etc., can solve the problems of environmental pollution, achieve good safety, reduce pulping costs, and benefit fully The effect of using

Inactive Publication Date: 2006-10-11
石建凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The function of the present invention is to solve the serious environmental pollution problem of the existing papermaking pulping technology

Method used

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  • Biocatalytic clean pulping agent and application process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Preparation of Biocatalytic Cleaning Pulping Agent Soaked Wheat Straw

[0066] Location: Yinchuan, Ningxia, with a dosage of 9 tons

[0067] Preparation formula is as follows: (weight percentage)

[0068] Amylase 3‰

[0069] Laccase 2‰

[0070] Hydroxybenzotriazole 5‰

[0071] Calcium chloride 5‰

[0072] SL-1 paper cooking aid 5‰

[0073] Sodium dodecyl sulfonate 5‰

[0074] Sodium Carbonate 3%

[0075] the rest is water

[0076] Soaking temperature 50-60℃

[0077] soaking time

[0078] The first 5.5 hours hardness 11.2 (potassium permanganate value)

[0079] The second 5 hours hardness 12.2

[0080] The third time 5+10 hours 30 ℃ hardness 13.7

[0081] The fourth 5.5 hours 40 ℃ hardness 15.3

[0082] The bleaching rate of bleaching pulp is 6.5%, the soaking liquid ratio is 8%, and the papermaking is 18g / m 2 Toilet paper, soaked black liquor is continuously reused without discharge, and other processes are the same as the alkaline papermaking and pulping ...

Embodiment 2

[0085] Prepare 9 tons of soaked wheat straw of this biocatalytic cleaning pulping agent.

[0086] Location: Alkali production line of Kangda Paper Industry, Weixian County, Hebei Province

[0087] Catalyst preparation ratio:

[0088] Amylase 2‰

[0089] Laccase 1‰

[0090] Hydroxybenzotriazole 4‰

[0091] Calcium chloride 5‰

[0092] SL-1 paper cooking aid 1%

[0093] Sodium Carbonate 3%

[0094] aqueous solution

[0095] Soaking temperature 50-60℃

[0096] Soaking process time: 4.5-6.5 hours

[0097] Immersion implemented at 1.2m 3 in a hydropulper

[0098] Liquid ratio 12%-14%

[0099] The continuous immersion cycle is reused 32 times, and the black liquor is reused by filtration every time without any discharge. The pulp bleaching rate is 6.7%, and the yield is estimated to be 46.75% (the yield of the same batch of wheat straw in the soda production line of the factory is 38.3%)

[0100] The pulp hardness before bleaching is 13.2-14 (potassium permanganate value...

Embodiment 3

[0103] The proportioning ratio of the preparation of the biochemical catalysis pulping agent is similar to that of the above formula. The process conditions are similar, soaking, crushing and rubbing cotton stalks. After soaking for 12 hours, the pulp hardness is 13.2, the whiteness of bleached pulp is ≥73°C, the fiber bundles are obviously long and white, and the example is successful.

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Abstract

The invention relates to a biochemical catalysis cleaning slurry agent and relative application. Said invention is formed by: amylase, laccase, hydroxybenztriazole, calcii chloridum SL-1 slurry braise agent, sodium carbonate, and water. And the application comprises: 1, cutting raw material to be kneaded and dedusted; 2, preparing material with wet method; 3, dipping to remove lignin colloid; 4, extruding slurry to replaced and separated, dipping to filter the left liquid to be recycled; 5, rough milling and combing wire; 6, screening slurry to remove foreign matters; 7, washing slurry; 8, finish milling slurry; 9, poaching slurry; 10, washing poached slurry; 11, stepped treating and recycling used water. The invention is characterized in dipping said raw material in normal temperature and pressure. The left liquid is not discharged, but be recycled. And the pulp is poached pulp. The invention can support industrial production.

Description

Technical field: [0001] The invention relates to a catalyst and its application process. Specifically, it is a biochemical catalytic pulping agent for industrial papermaking and its application process. No pulping polluted black liquor is discharged during production, realizing clean production. Background technique: [0002] In my country, papermaking and pulping mainly use non-wood fiber raw materials, wood is relatively scarce, non-wood fiber raw materials are abundant, low in price, and have obvious economic advantages. The main production processes include caustic soda method, sulfate method, ammonia method, etc., among which The caustic soda method is the main method, accounting for 60% of the pulping production. [0003] The fatal defect of the existing alkaline pulping technology is that a large amount of black liquor containing alkalized organic matter is produced, which seriously pollutes the environment and is very difficult to treat. At present, the relatively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/22D21H17/07D21H17/66D21H17/14D21C3/00D21B1/02D21B1/12D21B1/14D21C1/00D21D1/20D21C9/10D21C9/02D21C11/00
Inventor 石建凯
Owner 石建凯
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