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Method for preparing cellulose nitrate for explosive from wood pulp

A technology of cellulose nitrate and gunpowder, which is applied in directions such as explosives, nitrified explosive components, nitrocellulose compositions, etc., can solve problems such as increased smoke and lower gunpowder energy, and achieves stable price, low price, and cost-solving problems. Effect

Inactive Publication Date: 2011-10-19
SICHUAN NITROCELLULOSE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

④Inorganic salts are non-energy components, too much content in nitrocellulose will reduce the energy of gunpowder and increase the smoke when shooting
So far, there is no method for the preparation of cellulose nitrate for explosives by using wood pulp as a raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 500g of mixed acid into a 1000ml beaker equipped with mechanical stirring, wherein the mass fractions of the components in the mixed acid are respectively 35.23% nitric acid, 56.87% sulfuric acid, and 7.98% moisture. Add 25g of wood pulp below % into the beaker, stir and take it out after nitration reaction for 45 minutes, then carry out acid cooking and alkali cooking in turn, the zero-time acid of acid cooking is 3.5g / l (calculated as sulfuric acid), and the temperature is controlled at 105°C ~115°C, time 3h, control the alkalinity of alkali boiling at 0.79g / l (calculated as sodium carbonate), temperature 100°C~110°C, time 5h, after fine-cut fine washing, cellulose nitric acid for explosives can be produced ester.

[0033] The nitrogen content of the cellulose nitrate obtained in the present embodiment is 199.8ml / g (measured according to the interferometer method, the same below), and the viscosity is 8.6 ° E (measured according to the capillary viscometer method,...

Embodiment 2

[0035] Add 500g of mixed acid into a 1000ml beaker equipped with mechanical stirring, wherein the mass fractions of the components in the mixed acid are respectively 42.11% nitric acid, 50.36% sulfuric acid, and 6.71% moisture, and heat it in a water bath to a temperature of 15°C. Add 30g of wood pulp below % into the beaker, stir and take it out after nitration reaction for 45 minutes, then carry out acid boiling and alkali boiling successively, the zero-time acid of acid cooking is 4.5g / l (calculated as sulfuric acid), and the temperature is controlled at 105°C ~115°C, time 3h, alkalinity of alkali boiling is controlled at 0.68g / l (calculated as sodium carbonate), temperature 100°C~110°C, time 5h, after fine cutting and fine washing, the cellulose for explosives can be obtained Nitrates.

[0036] The nitrogen content of the cellulose nitrate prepared in the present embodiment is 211.4ml / g, the viscosity is 5.2°E, and the alcohol ether solubility, fineness and stability all m...

Embodiment 3

[0038] Add 500g of mixed acid into a 1000ml beaker equipped with mechanical stirring, wherein the mass fractions of the components in the mixed acid are respectively 45.86% nitric acid, 39.34% sulfuric acid, and 13.85% moisture, and heat it in a water bath to a temperature of 20°C. 25g of wood pulp below % is dispersed and added to the beaker, stirred and taken out after 45 minutes of nitration reaction, followed by acid boiling and alkali boiling, the zero-time acid of acid cooking is 2.2g / l (calculated as sulfuric acid), and the temperature is controlled At 90°C-100°C for 3 hours, the alkalinity of alkali boiling is controlled below 0.77g / l (calculated as sodium carbonate), the temperature is 102°C-110°C, and the time is 6 hours. nitrates.

[0039] The nitrogen content of the cellulose nitrate prepared in this embodiment is 195.4ml / g, the viscosity is 6.2°E, the alcohol ether solubility, fineness and stability all meet the requirements.

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Abstract

The invention relates to a method for preparing cellulose nitrate for an explosive from wood pulp, in particular relates to a preparation method of cellulose nitrate for an explosive and belongs to the technical field of cellulose preparation. The method is characterized by comprising the following steps: adding 20-30 parts by weight of wood pulp in 500 parts by weight of mixed acid, carrying outmiddle-low temperature nitration reaction and then washing; and then successively carrying out boil washing, shredding and refine washing so as to obtain the cellulose nitrate for the explosive. In the preparation method of the cellulose nitrate, the wood pulp is used as a raw material, which is not a precedent in the field of military cellulose nitrate, thereby broadening the use range of the raw material in nitrated cellulose production, and simultaneously, the wood pulp is cheaper than cotton linter and can be used as the raw material of energy-containing nitrated cotton for production, thereby greatly solving the cost problem of the raw material; and at the same time, the environmental protection pressure problem brought by a large amount of cotton dust, black liquid and acidic wastewater which are generated in the processes of cotton opening, boiling, bleaching and drying refined cotton when a nitrated cotton product is prepared by utilizing the cotton linter as the raw material is solved.

Description

technical field [0001] The invention relates to a method for preparing cellulose nitrate by using wood pulp as a raw material, in particular to a method for preparing cellulose nitrate for explosives, and belongs to the technical field of cellulose ester preparation. Background technique [0002] Cellulose nitrate, commonly known as nitrocellulose or nitrocellulose, is the product of the reaction between cellulose and nitric acid, and is an important raw material for the manufacture of propellants, missiles, and rocket propellants. [0003] The main raw material for the production of cellulose nitrate is cotton linters. ①Cotton linters contain cellulose accompanying organisms and impurities such as cottonseed hulls, cotton boll skins and dust brought in during the ginning process. Safety, and the quality of gunpowder, etc. will have adverse effects. ②In addition, the nitration products of pectin, lignin, and pentosan remain in nitrocellulose, which will reduce the chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B5/02C08B5/04C06B25/18C06B25/28
Inventor 张仁旭张尧赵利斌程从勇王维智
Owner SICHUAN NITROCELLULOSE CORP
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