Method of producing pulp by instant vaporization expansion-infiltration in straw sheets

A technology of instantaneous vaporization and straw flakes, which is applied to pulping with organic solvents, pulping of cellulose raw materials, and non-woody plant/crop pulp, etc. and other problems, to achieve the effect of improving the reaction rate and equilibrium conversion rate, eliminating feedback inhibition and low hardness

Active Publication Date: 2015-12-30
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the above-mentioned prior art, although it has a better pulping rate, the raw material sodium hydroxide used has a greater impact on the environment, and the waste water after pulping is still treated in a traditional way or require

Method used

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  • Method of producing pulp by instant vaporization expansion-infiltration in straw sheets
  • Method of producing pulp by instant vaporization expansion-infiltration in straw sheets

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Weigh grass slices: bagasse 100kg; organic solvent 100kg. The added sugarcane bagasse mass 0.004% surfactant Pingpingjia, 100kg of boiling water at 100°C, put Pingpingjia in boiling water and mix it for later use. Add the grass slices bagasse into the cooking pot, then add the above-mentioned weighed ethanol and mix and infiltrate the bagasse evenly. The soaking time is 10 minutes, and then add the above-mentioned 100°C boiling water with surfactant added, and the boiling water flow rate is 100kg / min. The ethanol that penetrates into the sugarcane fiber cells instantly vaporizes and expands to destroy the cell membrane, and then passes CO into the cooking pot 2 , control reaction pressure 7.1MPa, reaction temperature 80 ℃, reaction time 0.5h, using organic solvent ethanol, surfactant Pingpingjia and supercritical CO 2 Carry out self-catalytic de-lignification between fiber cells of grass slices. During the reaction, ethanol forms steam and the water vapor generated du...

Embodiment 2

[0035] The method steps of Example 1 were repeated with the components and process parameters specified in Table 1 below.

Embodiment 3

[0037] The method steps of Example 1 were repeated with the components and process parameters specified in Table 1 below.

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Abstract

The invention discloses a method of producing pulp by instant vaporization expansion-infiltration in straw sheets. The method includes the steps of adding straw sheets as a raw material into an organic solvent having a boiling point lower than 100 DEG C, according to a straw sheet to organic solvent weight ratio: 1:1 to 1:4 so as to infiltrate the straw sheets for 5-120 min, adding the straw sheets into 100 DEG C boiling water or vapor having a temperature higher than the boiling point of the organic solvent, according to a straw sheet to water weight ratio: 1:1 to 1:20, and producing pulp by boiling under supercritical CO2. cell membranes are caused to expand and break by instant vaporization of the organic solvent among fiber cells of the straw sheets, so that the speed of the removal of intercellular lignin from the straw sheets by boiling is increased by 1 to 5 times, and the usage of the organic solvent is decreased by 2 to 10 times.

Description

technical field [0001] The invention relates to a papermaking pulping process, in particular to a method for instantaneous vaporization expansion-infiltration pulping inside a grass slice. Background technique [0002] The total output of paper and paperboard in the world is about 400 million tons per year, and China's paper and paperboard production ranks first in the world. Paper and cardboard are mainly made of pulping, and the pulping process can be divided into: chemical method and mechanical method, as well as chemical mechanical method and semi-chemical method in between. At present, most paper mills in China use the chemical alkaline pulping method. Although the technology of the traditional pulping method is very mature, about 10 tons of black liquor is discharged for every ton of pulp produced, which not only causes waste of plant resources but also easily causes serious damage. environmental pollution problems. Therefore, the transformation and innovation of pap...

Claims

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Application Information

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IPC IPC(8): D21C3/20D21C3/22D21H11/12
Inventor 陈小鹏梁杰珍王琳琳王华生王剑南
Owner GUANGXI UNIV
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