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Method for controlling secondary stickies through lipase

A technology of lipase and stickies, applied in the field of waste paper pulping and papermaking, to achieve the effects of low production cost, increased authenticity rate, and low cost

Active Publication Date: 2013-05-01
TAIXING YIMING BIOLOGICAL PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for controlling secondary stickies in pulp and white water by lipase for the problem of secondary stickies in the production process of old newsprint deinking pulp, old corrugated box board pulp and mechanical pulp

Method used

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  • Method for controlling secondary stickies through lipase
  • Method for controlling secondary stickies through lipase
  • Method for controlling secondary stickies through lipase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Use lipase to control the secondary glue in the production process of waste piles.

[0035] Take 30GDIP and OCC dried pulp and dilute 3%thickness. Under the amount of different lipase adding, the old news paper DIP and OCC pulp are treated.The hydrolysis rate of triglycerides is greater than 96%, lipase transfers, and lipid synthesis rates are less than 2%.120min.

[0036]According to the literature SARJA T, Zabihian M And Kourunen P. Control of Potential Secondary Stickies in Deinked Pulp. 2003 TAPPI FALL Technology Conference, Paper 22-2-2.The sedimentation of the sedimentation of the colloidal substance caused the turbidity value of the system. The difference in turbidity difference is the change value of the turbidity and initial turbidity of the initial turbidity when the mulchic acid regulates pH.There is a positive relationship between the difference between the quantity and the turbidity.Examples filter the slurry after treatment, and take the filtering solution to ...

Embodiment 2

[0044] Use lipase to control the secondary glue in white water.

[0045] Take 200ml of old news paper DIP pulp and OCC pulp machine white water samples, and process it under different lipase added.The lipidase live 20000U / ml, the pH value is 8.0, the additional amount is 0.001 to 0.5%of the weight of the white water sample of DIP and OCC pulp machines, the temperature is 20-60 ° C, and the time is 60-120min.

[0046] After processing the paper machine, the white water of the paper machine is centrifuged 15 minutes under 2000r / min to remove the small fiber and other components; test the demand and turbidity of the cationic cation of white water after the centrifugation, and then use the sulfuric acid to adjust the pH to the turbidity to determine it.Differences of turbidity.The test results are as follows when the amount of enzymes is 0.001%, 0.05%, and 0.5%is calculated as follows.

[0047] The results are shown in Table 3. Table 4:

[0048] Table 3 Lipse processed DIP Paper Paper...

Embodiment 3

[0054] Use lipase control mechanical slurry production process in the process of production.

[0055] Take 30g of dried dry ponytail TMP pulp and dilute 3%thickness. Under different lipase adding, the slurry is processed.The hydrolysis rate is greater than 96%, the liponase transfers, the lipid synthesis rate is less than 2%.

[0056] For the processing of slurry filtering, take the filtering solution to remove small fibers and other components by centrifugal fiber at 2000r / min; test the demand and turbidity of cationic ions after centrifugal water -like, and then use sulfuric acid to regulate the turbidity and then measure it. Calculate, calculateDifferences before and after pH adjustment.The test results are as follows when the amount of enzymes is 0.001%, 0.05%, and 0.5%is calculated as follows.

[0057] The result is shown in Table 5:

[0058] Table 5 The removal effect of the secondary adhesive in ponytail TMP slop

[0059]

[0060] Resin substances in mechanical slurry are...

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Abstract

The invention discloses a method for controlling secondary stickies in paper pulp and white water during waste paper papermaking process through lipase. According to the invention, the pH (potential of hydrogen) value of lipase ranges from 7.5 to 9.0, the enzyme activity is larger than 100 U / mL, the hydrolysis rate for triglyceride is not lower than 95%, and transesterification and lipid synthesis rate of alkaline lipase is lower than 3%; a paper pulp processing method comprises the steps that lipase which is 0.001-0.5% of paper pulp dry weight is added into paper pulp with the pulp concentration which is adjusted in a range from 2% to 5%, and then the processed pulp is filtered, centrifuged and detected; and a white water processing method comprises the steps that lipase which is 0.001-0.5% of white water weight is added into papermaking white water for processing, and then the processed white water is filtered, centrifuged and detected. The method utilizes lipase to degrade the stickies thoroughly and reduce the deposition trend of the stickies, so that the removal purpose is achieved, and the problem of secondary sticky pollution is thoroughly solved; and the operation is simple, the removing effect is remarkable, the waste paper papermaking quality is improved, and the production cost is reduced.

Description

Technical field [0001] The present invention is a method of waste paper pulp, which specializes in the use of lipase to control the production of secondary glue in the production process of using lipase control. Background technique [0002] In the past ten years, the consumption of waste paper in the paper industry has increased rapidly. The proportion of waste pulp in the total global pulp consumption has been increasing. The recycling of waste paper can not only save a large amount of plant fiber raw materials, energy and reduction costs, but alsoIt is conducive to protecting the environment and reducing the destruction of the ecological environment. It has both economic benefits and good social benefits and environmental benefits.With the increase of the proportion of waste pulp and the increase in the degree of closure of white water, the adhesive problem in the reuse of waste paper has become increasingly serious. During the reuse process, the remaining chemicals, ink carri...

Claims

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Application Information

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IPC IPC(8): D21C9/08
Inventor 裴继诚郭宏明
Owner TAIXING YIMING BIOLOGICAL PRODS
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