Method for preparing unbleached bio-mechanical pulp by hot water treatment in cooperation with bio-enzyme treatment of wheat straw and fully utilizing byproducts

A technology of hot water treatment and biological enzyme, which is applied in fiber raw material treatment, cellulose treatment with microorganisms/enzymes, textiles and paper making, etc. The utilization rate of wheat straw and the effect of saving energy consumption in refining

Active Publication Date: 2021-04-30
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In traditional pulping and papermaking, wheat straw, as a representative of grasses, is an important raw material for papermaking, but because wheat straw leaves and leaf sheaths are not easy to beat, so usually only wheat straw straw is kept in the material preparation process, while wheat straw leaves and wheat straw sheaths are not It is required to remove as much as possible, but the removal of wheat straw leaves and wheat straw sheaths not only increases the cost of material preparation, but also greatly reduces the utilization rate of wheat straw raw materials

Method used

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  • Method for preparing unbleached bio-mechanical pulp by hot water treatment in cooperation with bio-enzyme treatment of wheat straw and fully utilizing byproducts
  • Method for preparing unbleached bio-mechanical pulp by hot water treatment in cooperation with bio-enzyme treatment of wheat straw and fully utilizing byproducts
  • Method for preparing unbleached bio-mechanical pulp by hot water treatment in cooperation with bio-enzyme treatment of wheat straw and fully utilizing byproducts

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Effect test

Embodiment 1

[0037] A process for preparing biomechanical pulp by coordinating biological enzyme treatment with wheat straw hot water, this embodiment prepares biomechanical pulp, and tests its pulping performance.

[0038] (1) Cut the air-dried wheat straw after physical selection and dedusting into 5cm-long spare raw materials, put it in a normal temperature reaction kettle, and carry out hot water treatment to the wheat straw according to the liquid ratio of 1:5 (g / mL), and the temperature is at 87°C. The processing time was controlled at 17min.

[0039](2) Add a small amount of KOH to the hot water in the reactor and the wheat straw mixture, adjust the pH value of the hot water at 14, and dissolve a small amount of hemicellulose, lignin and pectin in the wheat straw. Simultaneously with the softening of the water, the pH of the wheat straw water reaches 9 at the end of the treatment.

[0040] (3) Extrude the water-saturated wheat straw on a screw extruder, and adjust the pressure of t...

Embodiment 2

[0048] A process for preparing biomechanical pulp by coordinating biological enzyme treatment with wheat straw hot water, this embodiment prepares biomechanical pulp to prepare natural color corrugated paper, and tests its pulping performance.

[0049] (1) Cut the air-dried wheat straw after physical selection and dedusting into 5 cm long spare raw materials, put it in a normal temperature reaction kettle, and carry out hot water treatment to the wheat straw according to the liquid ratio of 1:4 (g / mL), the temperature is at 100 °C, The processing time is controlled at 30min.

[0050] (2) Add a small amount of alkali KOH to the hot water in the reactor and the wheat straw mixture, adjust the pH value of the hot water at 13, and dissolve a small amount of hemicellulose, lignin and pectin in the wheat straw. Simultaneously with softening with water saturation, the pH value of the water content of the wheat straw reaches 8 at the end of the treatment.

[0051] (3) Extrude the wat...

Embodiment 3

[0059] A process for preparing biomechanical pulp by coordinating biological enzyme treatment with wheat straw hot water, this embodiment prepares natural color corrugated paper from biomechanical pulp, and tests its pulping performance.

[0060] (1) Cut the air-dried wheat straw after physical selection and dedusting into 5cm long spare raw materials, put it in a normal temperature processor or reaction kettle, and carry out hot water treatment to the wheat straw according to the liquid ratio of 1:6 (g / mL), and the temperature is at 105°C, the processing time is controlled at 25 minutes.

[0061] (2) Add a small amount of KOH to the hot water in the reactor and the wheat straw mixture, adjust the pH value of the hot water at 13, so that a small amount of hemicellulose, lignin and pectin are dissolved in the wheat straw. Simultaneously with the softening of the water, the pH of the wheat straw water reaches 8 at the end of the treatment.

[0062] (3) Extrude the water-saturat...

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Abstract

The invention relates to a method for preparing unbleached bio-mechanical pulp and fully utilizing byproducts by treating wheat straw through hot water in cooperation with alkaline bio-enzyme, and provides a method for preparing high-strength unbleached bio-mechanical pulp by taking whole wheat straw as a raw material and treating whole wheat straw through hot water in cooperation with alkaline bio-enzyme for the first time. Therefore, the requirements for producing natural-color packaging paper and paper-based materials are met, byproducts of the natural-color packaging paper and the paper-based materials are recycled to prepare the biomass compound fertilizer, solid waste emission is not needed, and high-valued full utilization of wheat straw is achieved. The preparation method is simple, green, clean and efficient, and has good practical application value and wide application prospect.

Description

technical field [0001] The disclosure belongs to the field of papermaking technology and new materials, and specifically relates to a method for fully utilizing biomechanical pulp and by-products through hot water treatment and biological enzyme treatment. Background technique [0002] 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. my country's pulp and papermaking fiber raw material import dependence is close to 50%. Foreign waste paper imports make up for the gap in my country's fiber raw materials and support China's papermaking industry development. my country is facing a serious shortage of papermaking raw materials. For this reason, the project team has developed a new technology o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00
CPCD21C5/005Y02P70/10
Inventor 吉兴香王瑞明田中建陈嘉川刘玉马浩
Owner QILU UNIV OF TECH
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