Method for preparing bio-mechanical primary color pulp from wheat straw and fully utilizing byproducts

A technology for mechanical pulp and by-products, which is applied in the recovery of pulp by-products, pulp beating/refining methods, and pulping with inorganic alkalis, etc., can solve the problem of by-products, which has not been well solved, and is not conducive to the comprehensive high-value utilization of agricultural straws. And other issues

Active Publication Date: 2021-05-11
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of by-products produced in the pulping process has not been well resolved, which is not conducive to the comprehensive high-value utilization of agricultural straw

Method used

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  • Method for preparing bio-mechanical primary color pulp from wheat straw and fully utilizing byproducts
  • Method for preparing bio-mechanical primary color pulp from wheat straw and fully utilizing byproducts
  • Method for preparing bio-mechanical primary color pulp from wheat straw and fully utilizing byproducts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 A method for preparing biomechanical primary color paste and by-products from wheat straw straw

[0049] Described method comprises the following steps:

[0050] (1) Cut the wheat straw after physical selection and dedusting into small pieces of 2 cm, put it into the reaction kettle of the normal temperature processor, and carry out hot water treatment on the wheat straw according to the liquid ratio of 1:4, the temperature is 100 ℃, and the treatment time is 30 minutes ; At the same time, the rotten wheat straw that cannot be processed and used is collected;

[0051] (2) Add 2.5% KOH to the mixture of hot water and wheat straw in the reactor or processor, adjust the pH value of the hot water to 14, process for 30 minutes, and the temperature is 100°C to dissolve a small part of the hemifiber in the wheat straw Substances such as element, lignin and pectin, while the wheat straw is saturated and softened by water heat, the pH value of the water content of the...

Embodiment 2

[0056] Example 2 A method for preparing biomechanical primary color paste and by-products from wheat straw straw

[0057] Described method comprises the following steps:

[0058] (1) Cut the wheat straw after physical selection and dedusting into small pieces of 3 cm, put it into a processor or a reaction kettle, and carry out hot water mixing treatment on the wheat straw according to the liquid ratio of 1:5, the temperature is 110°C, and the processing time is 40 minutes; At the same time, the rotten wheat straw that cannot be used for processing is collected;

[0059] (2) Add 2% KOH to the hot water and wheat straw mixture in the reactor or processor, adjust the pH value of the hot water to 13, the temperature is 95°C, and the treatment time is 30 minutes; a small part of the hemifiber is dissolved in the wheat straw Substances such as element, lignin and pectin, while the wheat straw is saturated and softened by water heat, the pH value of the water content of the wheat st...

Embodiment 3

[0064] Example 3 A method for preparing biomechanical primary color paste and by-products from wheat straw straw

[0065] (1) Cut the wheat straw after physical selection and dedusting into small pieces of 2cm, put it into a processor or a reaction kettle, and treat the wheat straw with hot water according to the liquid ratio of 1:4, the temperature is 95°C, and the treatment time is 60min ; At the same time, the rotten wheat straw that cannot be processed and used is collected;

[0066] (2) Add 1.5% KOH to the mixture of hot water and wheat straw in the reactor or processor, adjust the pH value of the hot water to 13, process for 30 minutes, and the temperature is 100°C to dissolve a small part of the hemifiber in the wheat straw Substances such as element, lignin and pectin, while the wheat straw is saturated and softened by water heat, the pH value of the water content of the wheat straw reaches 8 at the end of the treatment, and the lye wastewater is collected;

[0067] (...

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Abstract

The invention belongs to the technical field of papermaking technology and comprehensive utilization of waste, and particularly relates to a method for preparing biological mechanical primary color pulp from wheat straw and fully utilizing byproducts. The method comprises the following steps of: by taking wheat straw as a pulping raw material, treating the wheat straw with hot water, then adding a trace amount of KOH, performing thermal saturation softening on the wheat straw, then adjusting the temperature of the wheat straw, adding alkaline compound enzyme for biological treatment, and finally grinding the wheat straw into pulp. The prepared mechanical pulp can meet the requirements for producing primary-color packaging paper and paper-based materials, meanwhile, byproducts of the mechanical pulp are recycled to prepare biomass compound fertilizer, solid waste is turned into wealth, and high-value full utilization of wheat straw is achieved. Therefore, the method has a good practical application value and a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of papermaking technology and comprehensive utilization of waste, and in particular relates to a method for preparing biomechanical primary color paste from wheat straw and fully utilizing by-products. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The paper industry is not only a consumer goods industry, but also an important basic raw material industry, involving many fields such as life, culture and education, industry and agriculture, national defense and aviation. In 2016, my country's pulp imports reached 21.06 million tons, and waste paper imports reached 28.5 million tons. The import dependence o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21C1/02D21C1/06D21B1/16C05G1/00C08B37/14C08H7/00
CPCD21C5/005D21C1/02D21C1/06D21B1/16C05B7/00C08B37/0003C08H6/00C05F7/00C05F11/00C05F7/02C12P2201/00D21H11/12D21C5/00D21C3/02C12P1/00D21B1/061D21C9/02D21C11/0007D21C11/10D21D1/20
Inventor 吉兴香王瑞明田中建陈嘉川杨桂花吕高金
Owner QILU UNIV OF TECH
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