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Direct nitrification method of bamboo fibers

A bamboo fiber, direct technology, applied in the field of direct nitrification of bamboo fiber, can solve problems such as environmental pollution

Inactive Publication Date: 2020-10-23
江西吉润花炮新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that the whole preparation process of nitrobamboo cellulose has serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of direct nitration method of bamboo fiber, concrete steps are as follows:

[0030] Pretreatment of bamboo fiber: put 2kg of bamboo fiber in a pressure container with stirring and heating functions, seal the container and evacuate it, and heat the container to 120°C at the same time to keep the vacuum constant. After 1 hour of heat preservation, Turn off the heating; keep the vacuum constant, inject a concentration of 10% lithium carbonate solution into the container until the bamboo fiber is just submerged, then start stirring, stop stirring after 1 hour, turn off the vacuum, and make the pressure in the container return to normal After pressing, open the pressurization valve to increase the pressure in the container to 5 atmospheres, keep the pressure constant, start stirring, stop stirring after stirring for 1 hour, and return the pressure in the container to normal pressure; open the valve at the bottom of the pressure container, After discharging the lithium...

Embodiment 2

[0034] Pretreatment of bamboo fiber: put the bamboo fiber in a pressure container with stirring and heating functions, seal the container and evacuate it, and heat the container to 80°C at the same time to keep the vacuum constant. After 5 hours of heat preservation, close the Heating; keep the vacuum constant, inject a lithium carbonate solution with a concentration of 5% into the container until the bamboo fiber is just submerged, then start stirring, stop stirring after 3 hours, turn off the vacuum, and return the pressure in the container to normal pressure Finally, open the pressurization valve to increase the pressure in the container to 5 atmospheres, keep the pressure constant, start stirring, stop stirring after 2 hours, and return the pressure in the container to normal pressure; open the valve at the bottom of the pressure container, and After the lithium carbonate solution is discharged, seal the container and evacuate it, keep the vacuum state unchanged, raise the ...

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Abstract

The invention discloses a direct nitrification method of bamboo fibers, and belongs to the technical field of pyrotechnic composition preparation. The method comprises pretreating the bamboo fibers, sequentially injecting water, concentrated sulfuric acid and fuming nitric acid into a stirring kettle, stirring until the bamboo fibers are completely nitrified, discharging the mixed acid, wherein the pH value of the effluent water ranges from 6 to 7, adding water, starting stirring, heating to boil, discarding the floating nitrified bamboo fibers, discharging water until the pH value of the discharged water is 7, adding water, adding baking soda, stirring for dissolving, adjusting the pH value of the water in the barrel to 10-11, heating, filtering until the pH value range of the effluent water is 7, taking out the nitrified bamboo fiber, spin-drying, drying and taking out to obtain the nitrified bamboo fiber. According to the method, non-nitrified and incompletely nitrified bamboo cellulose components in the nitrified bamboo fiber product can be removed, the product with high purity and nitrification degree is obtained, and the bamboo fiber pretreatment method can loosen the bamboocellulose crystal structure, thereby effectively enhancing the direct nitrification efficiency of the bamboo fiber.

Description

technical field [0001] The invention relates to a direct nitration method of bamboo fiber, belonging to the technical field of pyrotechnic preparation. Background technique [0002] my country is a big bamboo-producing country in the world and has abundant bamboo resources. Nitrocellulose is made from bamboo cellulose through nitration of nitric sulfur mixed acid. It belongs to nitrate esters and is another source of nitrocellulose after nitrocellulose. . Nitrocellulose has two major application fields, military and civilian. The one with high nitrogen content is used to make single-base medicine, smokeless gunpowder, and fireworks; the one with low nitrogen content is used to make spray paint, artificial leather, film, plastic, etc. Therefore, nitrocellulose has broad production prospects. [0003] Bamboo cellulose, the main raw material of nitrobamboo cellulose, comes from bamboo and needs to go through three steps: preparing bamboo fiber from bamboo, then preparing bambo...

Claims

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Application Information

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IPC IPC(8): C08B5/02C08B5/04
CPCC08B5/02C08B5/04
Inventor 刘吉平刘克普吉伟生于保藏李琪军周天驰
Owner 江西吉润花炮新材料科技有限公司
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