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Pinus khasys diethanol amine stewing pulping method

A technology of diethanolamine and simao pine, which is applied in the regeneration of pulping liquid, pulping with organic solvent, washing/replacing pulp treatment liquid, etc., can solve the problems of explosive safety hazards, flammability, high volatility, etc

Active Publication Date: 2017-02-15
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

[0026] Embodiment 1: the cooking and pulping method of Bensimao pine diethanolamine method, the specific content is as follows:

[0027] In the embodiment, the Simao pine is used as raw material, cut into length 23cm-33cm with a guillotine, and wood chips with a width of 3cm or less; the wood chips are screened and then subjected to microwave radiation synergistic pretreatment, and placed in a 1L steel sealed small tank after pretreatment Put it into a chain-type silicone oil bath cooking pot for diethanolamine cooking and pulping. After cooking, the obtained slurry is washed with the assistance of ultrasonic waves. The specific steps are as follows:

[0028] (1) Microwave radiation synergistic pretreatment: Simao pine wood chips are soaked in fresh diethanolamine solvent with the liquid ratio of the original raw material dry mass: total diethanolamine volume ratio = 1:15, mixed evenly, and put into the microwave reaction furnace Fix and close the door, heat up under the micro...

Embodiment 2

[0039] Embodiment 2: the cooking and pulping method of the Simao pine diethanolamine method, the specific contents are as follows:

[0040] In the embodiment, Simao pine is used as raw material, cut into wood chips with a length of 2 cm-3 cm and a width of less than 3 cm with a guillotine; after the wood chips are screened, microwave radiation synergistic pretreatment is carried out, and after pretreatment, they are placed in a 1L steel sealed small tank. And put it into a chain-type silicone oil bath cooking pot for diethanolamine cooking and pulping. After cooking, the obtained slurry is washed with the assistance of ultrasonic waves. The specific steps are as follows:

[0041] (1) Microwave radiation synergistic pretreatment: Simao pine wood chips are soaked in fresh diethanolamine solvent with the ratio of dry weight of original raw materials: total diethanolamine volume = 1:10, mixed evenly, and put into a microwave reaction furnace Fix and close the door, heat up under t...

Embodiment 3

[0052] Embodiment 3: the cooking and pulping method of Bensimao pine diethanolamine method, the specific content is as follows:

[0053] In the embodiment, the Simao pine is used as raw material, cut into wood chips with a length of 2cm-3 cm and a width of less than 3 cm with a guillotine; after the wood chips are screened, they are subjected to microwave radiation synergistic pretreatment, and after pretreatment, they are placed in a 1L steel sealed small tank. And put it into a chain-type silicone oil bath cooking pot for diethanolamine cooking and pulping. After cooking, the obtained slurry is washed with the assistance of ultrasonic waves. The specific steps are as follows:

[0054] (1) Microwave radiation synergistic pretreatment: Simao pine wood chips are soaked in the diethanolamine cooking waste liquid that has been separated from water by ultrafiltration in Example 2 and mixed Evenly, put it into the microwave reaction furnace to fix and close the door, heat up under ...

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PUM

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Abstract

The invention discloses a pinus khasys diethanol amine stewing pulping method. Pinus khasys which is a Yunnan special wood fiber raw material is used, and after microwave cooperative pretreatment, stewing pulping is carried by using a diethanol amine solvent. Pulp prepared by the method is has the characteristics of high yield, high viscosity and high strength. Separated waste liquid can be directly reused as a pretreatment solution and a stewing solvent.

Description

technical field [0001] The invention belongs to the technical field of organic solvent pulping of wood raw materials, and in particular relates to a method for cooking and pulping Simao pine raw materials with microwave synergistic pretreatment diethanolamine. 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 equi...

Claims

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Application Information

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IPC IPC(8): D21C3/20D21B1/30D21C9/02D21C11/00
CPCD21B1/306D21C3/20D21C9/02D21C11/00
Inventor 何洁陈克利
Owner KUNMING UNIV OF SCI & TECH
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