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Method for cooking and pulping pinus khasys propylene glycol

The technology of Simao pine propylene glycol and pine propylene glycol is applied in the fields of propylene glycol cooking pulping and wood raw material organic solvent pulping, which can solve the problems of flammable and explosive safety hazards and high volatility.

Inactive Publication Date: 2014-06-04
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

[0017] Embodiment 1: the method for cooking and pulping of pine pine propylene glycol method, the specific contents are as follows:

[0018] In the embodiment, Simao pine is used as a raw material, and the length is 2cm ~ 3cm, and the width is 3cm or less with a guillotine. After the wood section is screened, it is put into a chain-type silicone oil bath cooking pot for propylene glycol cooking and pulping. The specific steps are as follows:

[0019] (1) Prepare the cooking solution: prepare the propylene glycol aqueous solution according to the volume percentage concentration of 60%, and then prepare the propylene glycol cooking solution at a liquid ratio of 1:4.5, and then add 2% citric acid and 3% sulfuric acid;

[0020] (2) Put the cooking solution prepared in step (1) and the wood section together into a 1L steel sealed small tank in a chain silicone oil bath cooking pot;

[0021] (3) After step (2), seal the small steel tank, put it into a chain silicone oil bath cooking...

Embodiment 2

[0028] Embodiment 2: the cooking and pulping method of pine pine propylene glycol method, the specific content is as follows:

[0029] In the embodiment, the Simao pine is used as a raw material, and the length is 2cm~3cm, and the wood section with a width of 3cm is cut with a guillotine; the wood section is pre-impregnated after screening, and placed in a 1L steel sealed small tank after pre-impregnation, and put into Carry out propylene glycol cooking and pulping in the chain silicone oil bath cooking pot, the specific steps are as follows:

[0030] (1) Prepare the cooking solution: prepare the propylene glycol aqueous solution according to the volume percentage concentration of 70%, and then prepare the propylene glycol cooking solution at a liquid ratio of 1:6, and then add 3% citric acid and 2% sulfuric acid;

[0031] (2) Put the cooking solution prepared in step (1) and the wood section together into a 1L steel sealed small tank in a chain silicone oil bath cooking pot;...

Embodiment 3

[0039] Embodiment 3: the cooking and pulping method of pine pine propylene glycol method, the specific content is as follows:

[0040] In the embodiment, the Simao pine is used as a raw material, and the length is 2cm~3cm, and the wood section with a width of 3cm is cut with a guillotine; the wood section is pre-impregnated after screening, and placed in a 1L steel sealed small tank after pre-impregnation, and put into Carry out propylene glycol cooking and pulping in the chain silicone oil bath cooking pot, the specific steps are as follows:

[0041] (1) Preparation of cooking solution: Prepare propylene glycol aqueous solution at a volume percentage concentration of 90% (volume percentage), then prepare propylene glycol cooking solution at a liquid ratio of 1:8, and then add 3% citric acid and 1% sulfuric acid;

[0042] (2) Put the cooking solution prepared in step (1) and the wood section together into a 1L steel sealed small tank in a chain silicone oil bath cooking pot; ...

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Abstract

The invention discloses a method for cooking and pulping pinus khasys by using a propylene glycol organic solvent. According to the method, a special wood fiber raw material pinus khasys of Yunnan is adopted and is cooked and pulped by using a propylene glycol solvent, citric acid and sulfuric acid. Paper pulp prepared by the method disclosed by the invention has the characteristics of high yield, high viscosity, good strength and good paper pulp whiteness.

Description

technical field [0001] The invention belongs to the technical field of organic solvent pulping of wood raw materials, in particular to the field of propylene glycol cooking pulping of Simao pine raw materials. Background technique [0002] Simao pine, whose scientific name is Kaxi pine, is one of the main fast-growing timber tree species in Yunnan Province. It is the fastest-growing tree species among coniferous wood papermaking raw materials currently used in China. Simao pine has a fine wood structure, long wood fibers, and good toughness. The average fiber length is 3.78mm, and the fiber wall thickness is 3.7μm, especially the latewood wall thickness is 6.7μm. It is an ideal raw material for pulp and papermaking. [0003] At present, the pulping methods of Simao pine are mainly sulfate method and caustic soda method, but the main disadvantages of this method of pulping are serious pollution, high investment costs for equipment and waste liquid treatment. The purpose of o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/20
Inventor 何洁朱勇陈克利
Owner KUNMING UNIV OF SCI & TECH
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