Method for preparing natural biomechanical pulp from wheat straw treated by hot steam combined with biological enzyme

A technology of mechanical pulping and hot steam, applied in the direction of using microorganism/enzyme cellulose treatment, raw material pretreatment, fiber raw material treatment, etc., can solve the problem of inability to realize the full utilization of wheat harvesting waste, and solve the shortage of papermaking fiber raw materials, Achieve economic and social benefits and avoid pollution

Active Publication Date: 2019-04-26
QILU UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current pulping and papermaking process, generally only wheat straw is used, and wheat leaves and leaf sheaths are removed, so it is impossible to realize the full utilization of wheat harvesting waste

Method used

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  • Method for preparing natural biomechanical pulp from wheat straw treated by hot steam combined with biological enzyme
  • Method for preparing natural biomechanical pulp from wheat straw treated by hot steam combined with biological enzyme
  • Method for preparing natural biomechanical pulp from wheat straw treated by hot steam combined with biological enzyme

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preparation example Construction

[0023] In a first typical embodiment of the present disclosure, a method for preparing biomechanical pulp by hot steam treatment and biological enzyme treatment is provided, the method includes the following steps:

[0024] (1) Use the waste wheat straw after obtaining wheat grain as raw material, mix it with the wheat straw according to the liquid ratio of 1:3-1:8, add a small amount of alkali, make the pH value of the water in the wheat straw 10-14, and then pass it into the hot water Water steam, the hot water steam treatment process lasts for 15-60min, and the steam temperature is 100-120°C;

[0025] (2) After the hot steam treatment is finished, the wheat straw is rubbed and divided;

[0026] (3) Acting on the divided wheat straw and the alkaline biological complex enzyme, the treatment temperature is 40-60°C, and the treatment time is 30-90min;

[0027] (4) Refining the biologically treated wheat straw.

[0028] The raw material used in this disclosure is the waste whe...

Embodiment 1

[0046] Example 1: A method of treating wheat straw with hot steam and biological enzymes to prepare uncolored biomechanical pulp. This example prepares uncolored biomechanical pulp from wheat straw and tests its pulping performance.

[0047] (1) Cut the air-dried wheat straw after physical selection and dedusting into 5cm-long spare raw materials, put it into the wheat straw processor or reaction kettle, mix the wheat straw according to the liquid ratio of 1:5 (g / mL), and add A small amount of alkali NaOH is used to adjust the pH value of the wheatgrass water to 14.

[0048] (2) Feed hot water steam at a temperature of 110°C for 20 minutes to dissolve a small amount of hemicellulose, lignin, pectin and other substances in the wheat straw, soften the wheat straw with hot saturated water, and soften the water content of the wheat straw at the end of the treatment The pH is at 8.

[0049] (3) Roll the wheat straw TSP360 thread rolling machine that is saturated and softened by ho...

Embodiment 2

[0060] Example 2: A method of treating wheat straw with hot steam and biological enzymes to prepare uncolored biomechanical pulp. This example prepares uncolored biomechanical pulp from wheat straw and tests its pulping performance.

[0061] (1) Cut the air-dried wheat straw after physical selection and dedusting into 4cm-long spare raw materials, put it into the wheat straw processor or reaction kettle, mix the wheat straw according to the liquid ratio of 1:4 (g / mL), and add A small amount of alkali KOH adjusts the pH value of the water in the wheatgrass to 14.

[0062] (2) Feed hot water steam at a temperature of 100°C for 30 minutes to dissolve a small amount of hemicellulose, lignin, pectin and other substances in the wheat straw, soften the wheat straw with hot saturated water, and soften the water content of the wheat straw at the end of the treatment The pH is at 9.

[0063] (3) Roll the wheat straw softened by hot saturated water on the TSP360 thread rolling machine, ...

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Abstract

The invention relates to a method for preparing natural biomechanical pulp from wheat straw treated by hot steam combined with biological enzyme. The method comprises the following steps: taking wasteof crop wheat as a pulping raw material, treating the wheat straw with the hot steam, further adding a trace amount of alkali to adjust the pH of hot water to be 10 to 14, after dissolving a part ofsubstances of hemicellulose, lignin, pectin and the like in the wheat straw, and after performing hot-saturated softening on the wheat straw by hot water vapor, rolling filaments, physically separating the filaments of the wheat straw, then treating with the biological enzyme, and then further softening fibers, then grinding the wheat straw into pulp to meet the requirements of producing natural packaging paper and paper-based materials.

Description

technical field [0001] The disclosure belongs to the field of papermaking technology and new materials, and in particular relates to a method for preparing uncolored biomechanical pulp by treating wheat straw with hot steam and biological enzymes. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] The paper industry is an important basic raw material industry and occupies a very important position in the national economy. Closely related to social development and social civilization, the consumption level of paper and cardboard is one of the important symbols to measure the degree of modernization and civilization of a country. In 2016, my country's pulp imports reached 21.06 million tons, and waste paper imports reached 28.5 million tons. The import dependence of paper fiber raw materials was close to 50%. The large amount of waste paper made up f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21B1/02D21B1/04D21H11/12
CPCD21B1/02D21B1/021D21B1/04D21C5/005D21H11/12
Inventor 吉兴香陈嘉川王瑞明田中建王东兴邵学军
Owner QILU UNIV OF TECH
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