Pulping process by using grasses as raw material

A grass plant and process technology, applied in the field of papermaking, can solve the problems of difficult recovery and large pollution of pulping residue, and achieve the effects of less alkali consumption, good cooking effect and short cooking time.

Inactive Publication Date: 2019-01-11
广西宏瑞泰纸浆有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a pulping process using gramineous plants as raw materials. The process uses cheap gramineous plants as raw materials and uses

Method used

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  • Pulping process by using grasses as raw material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] S1 raw material preparation, removing impurities after the reed raw material is chopped;

[0023] S2 primary cooking: carry out primary cooking according to the liquid ratio of 1:4, the cooking temperature is 80°C, the cooking time is 15min, washed with water, the cooking liquid used is composed of the following components in mass percentage: 6% sodium hydroxide, 0.5% sodium sulfite, Sodium sulfide 1.6%, anthraquinone 0.5%, sodium dodecylsulfonate 0.03%, the balance water;

[0024] S3 secondary cooking: carry out secondary cooking according to the liquid ratio of 1:5, the cooking temperature is 60°C, the cooking time is 15min, and washed with water. The cooking liquid used is a mixed enzyme liquid composed of enzyme liquid I and enzyme liquid II at a mass ratio of 1.3:1 and Composition of water, wherein, the consumption of described water is 150 times of mixed enzyme solution.

Embodiment 2

[0026] S1 raw material preparation, removing impurities after the reed raw material is chopped;

[0027] S2 primary cooking: carry out primary cooking according to the liquid ratio of 1:4, the cooking temperature is 75°C, the cooking time is 20min, washed with water, the cooking liquid used is composed of the following components in mass percentage: 6% sodium hydroxide, 0.5% sodium sulfite, Sodium sulfide 1.6%, anthraquinone 0.5%, sodium dodecylsulfonate 0.03%, the balance water;

[0028] S3 secondary cooking: carry out secondary cooking according to the liquid ratio of 1:5, the cooking temperature is 55°C, the cooking time is 15min, and washed with water. The cooking liquid used is a mixed enzyme liquid composed of enzyme liquid I and enzyme liquid II at a mass ratio of 2.1:1 and Composition of water, wherein, the consumption of described water is 150 times of mixed enzyme solution.

Embodiment 3

[0030] S1 raw material preparation, removing impurities after the reed raw material is chopped;

[0031] S2 primary cooking: carry out primary cooking according to the liquid ratio of 1:5, the cooking temperature is 85°C, the cooking time is 10min, and washed with water. The cooking liquid used is composed of the following components in terms of mass percentage: 8% sodium hydroxide, 0.6% sodium sulfite, Sodium sulfide 2%, anthraquinone 0.5%, sodium dodecyl sulfonate 0.07%, the balance water;

[0032] S3 secondary cooking: carry out secondary cooking according to the liquid ratio of 1:6, the cooking temperature is 65°C, the cooking time is 15min, and washed with water. The cooking liquid used is a mixed enzyme liquid composed of enzyme liquid I and enzyme liquid II in a mass ratio of 1.5:1, An enzyme stabilizer and water, wherein the concentration of the enzyme stabilizer (glycerol) in the cooking liquid is 1 mmol / L, and the amount of the water is 200 times that of the mixed en...

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Abstract

The invention relates to a pulping process by using grasses as a raw material, and belongs to the field of paper making. The pulping process comprises twice cooking steps, wherein the cooking liquid used in primary cooking is prepared from the following components in percentage by mass: 5-8 percent of sodium hydroxide, 0.5-1.0 percent of sodium sulfite, 1-2.5 percent of sodium sulfide, 0.3-0.5 percent of anthraquinone, 0.02-0.1 percent of sodium dodecyl sulfate and the balance of water; and the cooking liquid used in secondary cooking is a mixed enzyme liquid consisting of an enzyme liquid I and an enzyme liquid II in a mass ratio of (1-3):1. The process has small dosage of alkali and enzyme to reduce waste emission, and is environment-friendly since the mixed enzyme cooking liquid can beused repeatedly; and furthermore, the process has short cooking time and good cooking effect.

Description

technical field [0001] The invention relates to a pulping process using gramineous plants as raw materials, belonging to the field of papermaking. Background technique [0002] Paper production is divided into two basic processes: pulping and papermaking. The methods used in the pulping process include mechanical methods, chemical methods or a combination of both methods to dissociate plant fiber raw materials into natural pulp or bleached pulp. Among them, chemical pulping is a more commonly used method. Its principle is to use chemical liquid to cook the tablet, and the chemical agent reacts with the lignin in the tablet at high temperature to form water-soluble substances, so that the fibers are separated and dispersed into slurry. Pulping is further divided into alkaline pulping and acid pulping. Chemical pulping can roughly retain the natural length of the fiber, remove most of the lignin, and produce high-strength, soft high-grade paper, but its disadvantages are als...

Claims

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Application Information

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IPC IPC(8): D21C3/02D21C3/22D21C3/26D21C5/00
CPCD21C3/022D21C3/222D21C3/26D21C5/005
Inventor 不公告发明人
Owner 广西宏瑞泰纸浆有限责任公司
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