Preparation method of biological mechanical pulp through synergy of hot water treatment and biological enzyme treatment

A technology for hot water treatment and mechanical pulping, which is used in fiber raw material treatment, cellulose treatment with microorganisms/enzymes, textiles and papermaking, etc., can solve the problem of inability to fully utilize wheat harvesting waste, and solve the shortage of papermaking fiber raw materials. , to eliminate incineration, to achieve the effect of economic and social benefits

Active Publication Date: 2019-04-16
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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  • Preparation method of biological mechanical pulp through synergy of hot water treatment and biological enzyme treatment
  • Preparation method of biological mechanical pulp through synergy of hot water treatment and biological enzyme treatment
  • Preparation method of biological mechanical pulp through synergy of hot water treatment and biological enzyme treatment

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preparation example Construction

[0022] In a first typical embodiment of the present disclosure, a method for preparing biomechanical pulp in which hot water treatment is coordinated with biological enzyme treatment is provided, the method includes the following steps:

[0023] (1) Use the waste wheat straw after obtaining wheat grain as raw material, carry out hot water treatment to wheat straw according to the liquid ratio of 1:4-1:8, add trace alkali at the same time, adjust the pH value of hot water to be 10-14, treat The temperature is 80-100°C, and the time is 15-60min;

[0024] (2) After the hot water treatment is finished, the wheat straw is extruded and divided;

[0025] (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;

[0026] (4) Refining the biologically treated wheat straw.

[0027] The raw material used in this disclosure is the waste wheat straw after obtaining wheat grain, including whe...

Embodiment 1

[0046] A process for preparing biomechanical pulp by coordinating biological enzyme treatment with hot water from wheat straw. This example prepares biomechanical pulp 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 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), the temperature is at 90°C, The processing time is controlled at 20min.

[0048] (2) Add a small amount of NaOH 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.

[0049] (3) Extrude the water-saturated wheat straw on a screw extruder, and adjust the pressure of the...

Embodiment 2

[0059] A process for preparing biomechanical pulp by coordinating biological enzyme treatment with wheat straw hot water. In this example, biomechanical pulp is prepared to prepare primary-color corrugated paper, and its pulping performance is tested.

[0060] (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 was controlled at 25min.

[0061] (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.

[0062] (3) Extrud...

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Abstract

The invention relates to a preparation method of biological mechanical pulp through synergy of hot water treatment and biological enzyme treatment. Waste of crop wheat is used as a raw material for pulp preparation, normal-pressure hot water is adopted for treating wheat straw hoods, meanwhile, a small amount of alkali is added to adjust the pH value of hot water to be 10-14, after part of hemicellulose, lignin, pectin and other substances in the wheat straw hoods are dissolved out, the wheat straw hoods are saturated, softened and treated through spiral extrusion, wheat straw hoods are physically split, then biological enzyme treatment is conducted, then fibers are further softened, then pulp grinding is conducted on the wheat straw hoods, and the demand for producing primary-color package paper and paper-base materials is met.

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 biomechanical pulp by hot water treatment and biological enzyme treatment. 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 for the gap in my ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00
CPCD21C5/005
Inventor 吉兴香陈嘉川王东兴田中建王瑞明
Owner QILU UNIV OF TECH
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