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Production method and application of complex enzyme liquid for chemi-mechanical pulping

A technology of chemical machinery and compound enzyme liquid, which is applied in the direction of biochemical equipment and methods, oxidoreductase, and microbial/enzymatic cellulose treatment, etc., which can solve the problem of single enzyme, yellowing of pulp, high energy consumption and equipment wear and other issues, to achieve the effect of improving quality, reducing energy consumption and reducing pollution

Active Publication Date: 2014-02-05
江苏富星纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned patented method is only a bleaching method for chemical-mechanical pulp, and cannot solve the problems of high energy consumption and serious equipment wear in the process of chemical-mechanical pulping, and only uses an enzyme preparation of xylanase, an enzyme preparation Although the use of the enzyme is helpful for pulp bleaching and preventing pulp yellowing, it cannot solve other factors that cause pulp yellowing due to the single type of enzyme and the limitation of the specificity of the enzyme preparation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A production method of a compound enzyme solution for chemical mechanical pulping. The enzymes of each component are weighed, mixed and prepared in a compound tank, preserved, inspected, packaged, and then stored in a warehouse at 5°C. The enzymes of each component are alkali Alkaline pectinase, xylanase, mannanase and ligninase; the alkaline pectinase is CCTCC NO: M 2010004 bacterial strain culture, shake flask fermentation, seed tank to fermenter, filter , degerming, and antiseptic treatment; the xylanase is prepared after CGMCC NO:5466 strain culture, shake flask fermentation, seed tank to fermenter, filtration, sterilization, and antiseptic treatment; the nectar Glycanase is prepared by CGMCC NO: 6226 strain cultured by strain, shake flask fermentation, seed tank to fermenter, filtered, sterilized, and preserved; the ligninase is prepared by CGMCC NO: 6225 strain by strain Cultivate, shake flask fermentation, prepare from seed tank to fermenter, filter, sterilize, a...

Embodiment 2

[0060] The activity of alkaline pectinase in the compound enzyme liquid described in this embodiment is 1300u / ml, the activity of xylanase is 1500u / ml, the activity of mannanase is 800u / ml, and the activity of ligninase is 180u / ml.

[0061] The papermaking raw material described in this embodiment is poplar wood chips.

[0062] The chemical mechanical pulping described in this embodiment is APMP alkaline hydrogen peroxide chemical mechanical pulping.

[0063] In this example, the addition amount of the compound enzyme liquid is 1.5% of the mass percentage of the absolute dry papermaking raw material. The enzyme treatment conditions are: temperature 50°C, pH 8.0, and enzymolysis time 230 minutes. After the enzymolysis is completed, the follow-up process is carried out as usual . That is, poplar wood chips are enzymatically hydrolyzed, steamed, and DTPA and Na 2 SO 3 Extrusion prepreg, adding NaOH and H in two stages 2 o 2 Extrusion prepreg, adding NaOH and H in three sta...

Embodiment 3

[0067] The activity of alkaline pectinase in the compound enzyme liquid described in this embodiment is 1200u / ml, the activity of xylanase is 1300u / ml, the activity of mannanase is 700u / ml, and the activity of ligninase is 130u / ml.

[0068] The papermaking raw material described in this embodiment is reed.

[0069] The chemical mechanical pulping described in this embodiment is BCTMP bleached chemical thermomechanical pulping.

[0070] In this example, the amount of compound enzyme liquid added and the mass percentage of absolute dry papermaking raw materials are 1.5%, the enzyme treatment conditions are: temperature 55°C, pH 8.0, enzymolysis time 180 minutes, after the enzymolysis is completed, the subsequent process is carried out as usual . That is, the reed is pulped after enzymatic hydrolysis, steaming, chemical impregnation, preheating, pressure refining, screening, and bleaching.

[0071] After the raw materials are pretreated by the compound enzyme solution, the am...

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PUM

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Abstract

The invention discloses a production method of a complex enzyme liquid for chemi-mechanical pulping. The production method is characterized by comprising the following steps: weighing various component enzymes, mixing and compounding the various component enzymes in a compounding tank, preventing corrosion, inspecting, packaging and storing in a storeroom at 5 DEG C, wherein the various component enzymes comprise alkaline pectinase, xylanase, mannose and ligninase. The application of the complex enzyme liquid in chemi-mechanical pulping is realized as follows: before steaming paper-making raw materials, adding the complex enzyme liquid to the paper-making raw materials through a metering pump, uniformly mixing the complex enzyme liquid with the paper-making raw materials for enzymatic hydrolysis under enzymatic treatment conditions that the temperature is 40-60 DEG C and enzymatic hydrolysis duration is 30-240 minutes; after the enzymatic hydrolysis, performing following processes as normal. The production method, through coupling synergistic effect of multiple enzymes of the complex enzyme liquid in chemi-mechanical pulping, can be used for improving the whiteness of pulp by 2-5% and reducing the pulp yellowing under a condition of guaranteeing high yield and low cost of pulping; the production method can be used for reducing the dosage of chemical raw materials by 20-30% and reducing the pulp grinding energy consumption by 18-30%; meanwhile, the production method can be used for reducing pollution and improving the pulp quality.

Description

technical field [0001] The invention relates to a pulping of papermaking raw materials, in particular to a chemical mechanical pulping method of papermaking raw materials, in particular to a production method and application of a compound enzyme liquid for chemical mechanical pulping. Background technique [0002] Chemithermomechanical pulp (CTMP or BCTMP) technology has developed rapidly since the first production line was built in the 1970s, and APP / APMP and PRC were successively developed in the late 1980s and 1990s. In the late 1980s, Scott Paper invented this process for the first time, and called the pulp made by this process Alkaline Hydrogen Peroxide Pulp (APP). Andritz later developed its own process and patented it under the name Alkaline Hydroperoxide Mechanical Pulp. Both are essentially the same. The existing APP / APMP factory adds a hydrogen peroxide bleaching tower behind the refiner, forming a hybrid process that combines APP / APMP and BCTMP, that is, P-RCAPM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N9/88C12N9/42C12N9/24C12N9/02D21C5/00
CPCC12N9/0061C12N9/0065C12N9/248C12N9/2488C12N9/88C12Y110/03002C12Y111/01013C12Y111/01014C12Y402/02002D21C5/005
Inventor 李忠兴杨忠义藺小辉
Owner 江苏富星纸业有限公司
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