A method of cooking and pulping Dalong bamboo pre-impregnated with diethanolamine-anthraquinone

A diethanolamine and pre-impregnation technology, which is used in digesters, textiles, and papermaking, papermaking, etc., can solve the problems of high volatility, flammability, and explosive safety hazards, and achieve good strength, high yield, and high yield. Effect

Inactive Publication Date: 2015-09-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low boiling point, high volatility and flammability of this type of low boiling point organic solvents, the pulping and cooking must be carried out under high pressure, and there are potential safety hazards of flammability, explosion and related accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: The Dalong bamboo pre-impregnated diethanolamine-anthraquinone cooking pulping method, the specific content is as follows:

[0026] In the embodiment, the Dalong bamboo is used as raw material, cut into length 2cm ~ 3cm with a guillotine, and bamboo sections with a width of 3cm or less; the bamboo sections are pre-impregnated after being screened, and placed in a 1L steel sealed small tank after pre-impregnation. Put it into the chain silicone oil bath cooking pot to carry out the diethanolamine-anthraquinone method cooking and pulping, the specific steps are as follows:

[0027] (1) Pre-soaking: The Bamboo section of Dalong bamboo is soaked in fresh diethanolamine solvent with the ratio of dry mass of initial raw material: total diethanolamine volume = 1:10, and soaked at 60°C for 36 hours;

[0028] (2) Take the bamboo segment after pre-impregnation in step (1) and part of the pre-impregnation solution (diethanolamine solvent used in the pre-impregnation ...

Embodiment 2

[0040] Embodiment 2: The Dalong bamboo pre-impregnated diethanolamine-anthraquinone cooking pulping method, the specific content is as follows:

[0041]In the embodiment, the Dalong bamboo is used as raw material, cut into length 2cm ~ 3cm with a guillotine, and bamboo sections with a width of 3cm or less; the bamboo sections are pre-impregnated after being screened, and placed in a 1L steel sealed small tank after pre-impregnation. Put it into the chain silicone oil bath cooking pot to carry out the diethanolamine-anthraquinone method cooking and pulping, the specific steps are as follows:

[0042] (1) Pre-soaking: The Bamboo section of Dalong bamboo is soaked in the diethanolamine-anthraquinone cooking waste liquid after ultrafiltration and water separation with the ratio of the absolute dry mass of the original raw material:total solution volume=1:15, Immerse at a temperature of 60°C for 24 hours;

[0043] (2) Bamboo segments pre-impregnated in step (1) and part of the pr...

Embodiment 3

[0055] Embodiment 3: The Dalong bamboo pre-impregnated diethanolamine-anthraquinone cooking pulping method, the specific content is as follows:

[0056] In the embodiment, the Dalong bamboo is used as raw material, cut into length 2cm ~ 3cm with a guillotine, and bamboo sections with a width of 3cm or less; the bamboo sections are pre-impregnated after being screened, and placed in a 1L steel sealed small tank after pre-impregnation. Put it into the chain silicone oil bath cooking pot to carry out the diethanolamine-anthraquinone method cooking and pulping, the specific steps are as follows:

[0057] (1) Pre-soaking: The Bamboo section of Dalong bamboo is soaked in the diethanolamine-anthraquinone cooking waste liquid after ultrafiltration and water separation with the ratio of the absolute dry mass of the original raw material:total solution volume=1:20, Immerse at a temperature of 40°C for 48h;

[0058] (2) Bamboo segments pre-impregnated in step (1) and part of the pre-im...

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Abstract

The invention discloses a dendrocalamus hamiltonii pre-impregnated diethanol amine-anthraquinone cooking and pulping method. According to the method, a special wood assortment dendrocalamus hamiltonii of Yunnan is adopted and is pre-impregnated; then the dendrocalamus hamiltonii is cooked and pulped by a diethanol amine solvent and an anthraquinone auxiliary agent. Paper pulp prepared by the method disclosed by the invention has the characteristics of high yield, high viscosity and good strength; separated waste liquid can be directly used as a pre-impregnating solution and a cooking solvent to be circularly utilized.

Description

technical field [0001] The invention belongs to the technical field of organic solvent pulping of bamboo raw materials, in particular to the field of pre-impregnated diethanolamine-anthraquinone cooking pulping of Dalong bamboo raw materials. Background technique [0002] Dalong bamboo has an average fiber length of 2.72mm, an average width of 26.37μm, and an aspect ratio of 103.2. It is one of the bamboo species with the largest cultivation area, the widest range of uses, and the highest economic value in Yunnan Province. It has broad development and utilization prospects . [0003] And since the development of the pulp and paper industry, kraft pulping and caustic soda pulping have become the mainstream of the pulping industry, but the main disadvantages of this type of pulping are serious pollution and high investment costs. The purpose of organic solvent pulping is to replace the traditional pulping process and seek new methods to improve paper quality and output. At p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/00D21C7/00
Inventor 何洁刘其星杨光丽字学奇李春丽
Owner KUNMING UNIV OF SCI & TECH
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