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A method for preparing natural color mechanical pulp by treating bagasse with laccase

A technology of natural machinery and bagasse pulp, which is applied in the use of microorganisms/enzyme cellulose treatment, fiber raw material treatment, non-woody plants/crop pulp, etc., can solve the problems of high physical properties of paper sheets, achieve good water filtration performance, Effect of improving slurry strength and increasing efficiency

Active Publication Date: 2021-03-30
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction conditions of this method are mild, and the only product is water. The whole process does not use chemicals, which solves the problem of environmental pollution. The prepared bagasse natural color mechanical pulp has good water filtration performance. high physical performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method for preparing natural color mechanical pulp by treating bagasse with laccase, the specific steps are as follows:

[0026] ①Hot water pre-extraction:

[0027] The bagasse raw material is mixed with water at a liquid ratio of 1:2, and hot water pre-extraction is carried out in a temperature-controllable digester. The process conditions for hot water pre-extraction are: from normal temperature to 85°C, and the heating time is 10min. The holding time is 5 minutes.

[0028] ②The first stage of laccase biological treatment:

[0029] Mix the bagasse after hot water pre-extraction with water at a liquid ratio of 1:5, adjust the pH=2, and the temperature is 15°C, add laccase and 1-hydroxybenzotriazole and mix evenly, and then pass air in Reacting for 1 min under stirring condition, filtering the treated bagasse pulp to obtain bagasse pulp and filtrate. Wherein, the dosage of laccase per gram of dry bagasse is 5 IU, and the dosage of 1-hydroxybenzotriazole per 100 g...

Embodiment 2

[0035] The method for preparing natural color mechanical pulp by treating bagasse with laccase, the specific steps are as follows:

[0036] ①Hot water pre-extraction:

[0037] The bagasse raw material is mixed with water at a liquid ratio of 1:10, and hot water pre-extraction is carried out in a temperature-controllable digester. The process conditions for hot water pre-extraction are: from normal temperature to 300°C, and the heating time is 100min. The holding time is 120min.

[0038] ②The first stage of laccase biological treatment:

[0039] Mix the bagasse pre-extracted by hot water with water at a liquid ratio of 1:20, adjust the pH=9, and the temperature is 75°C, add laccase and violin acid to mix evenly, and then introduce oxygen to react under stirring conditions After 100 minutes, filter the treated bagasse pulp to obtain bagasse pulp and filtrate. Wherein, the dosage of laccase per gram of dry bagasse is 200 IU, and the dosage of violuric acid corresponding to 100...

Embodiment 3

[0045] The method for preparing natural color mechanical pulp by treating bagasse with laccase, the specific steps are as follows:

[0046] ①Hot water pre-extraction:

[0047] The bagasse raw material is mixed with water at a liquid ratio of 1:8, and hot water pre-extraction is carried out in a temperature-controllable digester. The process conditions for hot water pre-extraction are: from normal temperature to 160°C, and the heating time is 30min. The holding time is 60min.

[0048] ②The first stage of laccase biological treatment:

[0049]Mix the bagasse pre-extracted by hot water with water at a liquid ratio of 1:10, adjust the pH=5, and the temperature is 60°C, add laccase and p-hydroxybenzoic acid and mix well, and then pass in oxygen under stirring conditions After reacting for 60 minutes, the treated bagasse pulp was filtered to obtain bagasse pulp and filtrate. Wherein, the dosage of laccase per gram of dry bagasse is 20 IU, and the dosage of p-hydroxybenzoic acid c...

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Abstract

The invention discloses a method for preparing natural colored mechanical pulp by utilizing laccase to treat bagasse. According to the technical scheme, the method comprises the steps that hot water pre-extraction is conducted on bagasse, laccase and an interbody are adopted to conduct first-stage laccase biotreatment on the hot water pre-extracted bagasse, the bagasse pulp obtained after first-stage laccase biotreatment is ground, then the filtrate obtained after first-stage laccase biotreatment is adopted to conduct second-stage laccase biotreatment on the ground pulp. The reaction conditions of the method are moderate, the unique product is water, no chemical agent is not used in the whole technological process, the environmental pollution problem is solved, the prepared natural coloredmechanical pulp of the bagasse has good water filtering performance, and the physical properties of prepared paper are high.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking in light industry technology, and in particular relates to a method for preparing natural color mechanical pulp by treating bagasse with laccase. Background technique [0002] my country's forest resources are few, and timber resources are seriously scarce. At present, my country's pulp and paper industry is facing a shortage of resources. Therefore, making full use of non-wood fiber raw materials has become an important method to alleviate the shortage of raw materials in the pulp and paper industry. However, it is also a good fiber raw material for pulping and papermaking. In major sugar-producing provinces such as Guangxi, Yunnan, and Guangdong, because bagasse is easy to transport in a centralized manner, it reduces the cost of collection and transportation, making the use of bagasse an advantage. pulp and paper raw materials. [0003] Traditional bagasse pulping methods mainly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/00D21H11/12
CPCD21C5/005D21H11/12
Inventor 王志伟吴明马海茼黄欢欢王双飞刘新亮鲁鹏
Owner GUANGXI UNIV
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