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Method for making paper pulp from corn husks with one-pot method

A corn husk and pulp technology, which is applied in papermaking, pulp bleaching, textiles and papermaking, etc., can solve the problems of affecting the root system development of crops, not being suitable for returning to the field, and high fiber content, so as to achieve good whiteness stability and reduce emissions , high cleanliness effect

Active Publication Date: 2016-11-16
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Agricultural and forestry waste corn husks, also known as corn husks, are the outer coating of corn ears. It has high cellulose content, compact tissue structure, high fiber content and thick waxy layer, which is not easy to rot, and will affect crops after returning to the field. The root system develops and affects cultivation, so it is not suitable for returning to the field, so most of the corn husks are directly discarded or burned on the spot, which not only causes a serious waste of resources, but also causes a certain degree of environmental pollution

Method used

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  • Method for making paper pulp from corn husks with one-pot method

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Embodiment 1

[0022] Such as figure 1 Shown, the present invention utilizes the method for the corn husk one-pot method to manufacture paper pulp, and the steps are:

[0023] a. Cut the fresh undried green corn husks into 3-5cm length segments, put them into a pulverizer and pulverize them for 10 seconds to obtain filamentous fine fibers with a length less than 1cm;

[0024] B. the maize husks after pulverizing are tiled in the reactor (reactors used in the present invention are all types of flat-bottomed heatable containers), adding a concentration of 20g / L biological laccase aqueous solution to the corn bracts The skin is just completely submerged, and the system is kept at 60°C for 24 hours;

[0025] c. adding volume in the reactor is 10% H of the total volume of material (i.e. biological laccase aqueous solution and corn husk immersed therein) in the reactor 2 o 2 As a bleaching agent, the mass is 0.3% MgSO of the total mass of the material in the reactor 4 and a mass of 3.0% Na of ...

Embodiment 2

[0029] Such as figure 1 Shown, the present invention utilizes the method for the corn husk one-pot method to manufacture paper pulp, and the steps are:

[0030] a. Cut the fresh undried green corn husks into 3-5cm length segments, put them into a pulverizer and pulverize them for 15 seconds to obtain filamentous fine fibers with a length less than 1cm;

[0031] B. the maize husks after pulverizing are tiled in the reactor (reactors used in the present invention are all types of flat-bottomed heatable containers), adding a concentration of 10g / L biological laccase aqueous solution to the corn husks in the reactor The skin is just completely submerged, and the system is kept at 50°C for 20 hours;

[0032] c. adding volume in the reactor is the total volume of 12% H of the material (i.e. biological laccase aqueous solution and corn husks immersed therein) in the reactor 2 o 2 As a bleaching agent, the mass is 0.4% MgSO of the total mass of the material in the reactor 4 and a ...

Embodiment 3

[0036] Such as figure 1 Shown, the present invention utilizes the method for the corn husk one-pot method to manufacture paper pulp, and the steps are:

[0037] a. Cut the fresh undried green corn husks into small sections with a length of 3-5cm, put them into a pulverizer and pulverize them for 20 seconds, and obtain filamentous fine fibers with a length of less than 1cm;

[0038] b. the maize husks after pulverizing are spread in the reactor (reactors used in the present invention are all types of flat-bottomed heatable containers), adding a concentration of 12g / L biological laccase aqueous solution to the corn bracts The skin is just completely submerged, and the system is kept at 55°C for 21 hours;

[0039] c. adding volume in the reactor is 15% of the total volume of material (i.e. biological laccase aqueous solution and corn husk immersed therein) in the reactor 2 o 2 As a bleaching agent, the mass is 0.5% MgSO of the total mass of the material in the reactor 4 and a...

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Abstract

The invention discloses a method for making paper pulp from corn husks with a one-pot method. The method is characterized in that fresh corn husks are crushed into thin threadlike fibers with the length smaller than 1 cm; the crushed corn husks are put into a reactor and just soaked with a biological laccase solution with concentration of 10-20 g / L, and a mixed solution is kept at the temperature of 50-60 DEG C for 20-24 h; H2O2 accounting for 10%-20% of the total volume of materials in the reactor, MgSO4 accounting for 0.3%-0.5% of the total mass of the materials in the reactor and 3.0%-5.0% of Na2SiO3 are added, pH is regulated to 9-10, and under the condition that the pH of a system is not changed, the materials are cooked and bleached at the temperature of 90-100 DEG C until the corn husks become white floccular pulp; after cooling, a product is filtered, washed and dried, and the white corn husk paper pulp is obtained. According to the method, cooking and bleaching are performed simultaneously with the one-pot method, the technology is simple, no intermediate pollution products are produced, furthermore, an early-stage preparation process only requires a step of crushing, no wastewater is produced, and accordingly, the whole technology is low in cost and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for producing paper pulp using a one-pot method of corn husks. Background technique [0002] Agricultural and forestry waste corn husks, also known as corn husks, are the outer coating of corn ears. It has high cellulose content, compact tissue structure, high fiber content and thick waxy layer, which is not easy to rot, and will affect crops after returning to the field. The root system develops and affects cultivation, so it is not suitable for returning to the field, so most of the corn husks are directly discarded or burned on the spot, which not only causes a serious waste of resources, but also causes a certain degree of environmental pollution. [0003] With the development of the economy, my country's environmental pollution has intensified in recent years, especially the frequent occurrence of atmospheric "smog", which has seriously affected people's life an...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21C9/16D21C3/00
CPCD21C3/00D21C9/163D21H11/12
Inventor 刘延湘刘君侠
Owner JIANGHAN UNIVERSITY
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