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Method for preparing natural-color biological mechanical pulp by wheat straw treatment under synergistic action of hot water and alkaline biological enzymes

A mechanical pulp and bio-enzyme technology, applied in the direction of pretreatment with alkaline compounds, microbial/enzymatic cellulose treatment, water/steam pretreatment, etc., can solve the problem of reducing the utilization rate of wheat straw raw materials, increasing the cost of material preparation, and difficult beating, etc. problems, to achieve the value of good practical application and the prospect of industrial application, good social benefits, and the effect of avoiding pollution

Active Publication Date: 2019-04-05
QILU UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional papermaking process in the past, wheat straw, as a representative of grasses, is an important papermaking raw material, 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 natural-color biological mechanical pulp by wheat straw treatment under synergistic action of hot water and alkaline biological enzymes
  • Method for preparing natural-color biological mechanical pulp by wheat straw treatment under synergistic action of hot water and alkaline biological enzymes
  • Method for preparing natural-color biological mechanical pulp by wheat straw treatment under synergistic action of hot water and alkaline biological enzymes

Examples

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Effect test

Embodiment 1

[0045] A process for preparing biological natural color biomechanical pulp from wheat straw. This implementation case prepares biomechanical pulp and tests its pulping performance.

[0046] (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, and carry out hot water treatment on the wheat straw according to the liquid ratio of 1:5, the temperature is 90°C, and the treatment time is Controlled at 20min.

[0047] (2) adding a trace amount of NaOH to the hot water in the reactor or processor and the wheat straw mixture, adjusting the pH value of the hot water to 14, so that the materials such as a small part of hemicellulose, lignin and pectin are dissolved in the wheat straw. While the wheat straw is saturated with hot water and softened, the pH value of the water in the wheat straw reaches 9 at the end of the treatment.

[0048] (3) Roll the wheat straw saturated an...

Embodiment 2

[0056] A process for preparing biological uncolored biomechanical pulp from wheat straw. This implementation case prepares uncolored biomechanical pulp to produce uncolored corrugated paper, and tests its pulping performance.

[0057] (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, and carry out hot water treatment on the wheat straw according to the liquid ratio of 1:4, the temperature is 100°C, and the treatment time is Controlled at 25min.

[0058] (2) Add a small amount of alkali 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, and dissolve a small part of hemicellulose, lignin and pectin in the wheat straw , while the wheat straw is saturated and softened by hot water, the pH value of the water in the wheat straw reaches 8 at the end of the treatment.

[0059] (3) Roll the wheat straw...

Embodiment 3

[0067] A process for preparing biological natural color biomechanical pulp from wheat straw. In this implementation case, natural color biomechanical pulp is used to prepare corrugated base paper, and its pulping performance is tested.

[0068] (1) Cut the air-dried wheat straw after physical selection and dedusting into 5cm-long spare raw materials, put it into a normal temperature processor or reaction kettle, and carry out hot water treatment on the wheat straw according to the liquid ratio of 1:6, the temperature is 100°C, and the processing time is Controlled at 30min.

[0069] (2) Add a trace amount of NaOH to the hot water in the reactor or processor 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, While the wheat straw is saturated and softened by the hot water, the pH value of the water in the wheat straw reaches 8 at the end of the treatment.

[0070] (3) Roll...

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Abstract

The invention provides a method for preparing natural-color biological mechanical pulp by wheat straw treatment under the synergistic action of hot water and alkaline biological enzymes. The method includes: S1, chopping pretreated wheat straw, adding water for hot water treatment, and adjusting solution to alkaline; S2, subjecting wheat straw treated in the step S1 to thread rolling treatment; S3, adding the alkaline biological enzymes into the wheat straw treated in the step S2 to realize enzymolysis treatment; S4, after enzymolysis treatment of the wheat straw in the step S3, subjecting thewheat straw to pulping treatment to prepare the natural-color biological mechanical pulp. The method of adopting whole wheat straw as a raw material for preparing natural-color biological mechanicalpulp by whole wheat straw treatment under the synergistic action of hot water and the alkaline biological enzymes is put forward for the first time, and requirements of production of natural-color packaging paper and paper-based materials are met. The preparation method is simple, convenient, green, clean and efficient and has a high practical application value and a promising industrial application prospect.

Description

technical field [0001] The invention belongs to the field of papermaking technology and new material technology, and in particular relates to a method for preparing uncolored biomechanical pulp by treating wheat straw with hot water and alkaline biological enzymes. 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 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 i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21C1/02D21C1/06D21B1/16D21H11/12
CPCD21B1/16D21C1/02D21C1/06D21C5/005D21H11/12Y02P70/10
Inventor 吉兴香王瑞明田中建陈嘉川王东兴邵学军
Owner QILU UNIV OF TECH
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