Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing superhigh-viscosity energy-containing cellulose nitrate

A technology of cellulose nitrate and viscosity, applied in the field of preparation of cellulose ester, can solve problems such as the inability to guarantee ultra-high viscosity index and the like

Inactive Publication Date: 2011-10-19
SICHUAN NITROCELLULOSE CORP
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no other manufacturer in China that can produce ultra-high-viscosity explosive cotton products. Although the physical and chemical indicators of the products that may be produced, such as the degree of nitration and stability, meet the standards, they cannot guarantee their ultra-high viscosity indicators. Explosive cotton production is a technical problem to be solved

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 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 27.11% nitric acid, 56.87% sulfuric acid, and 15.09% moisture, and heat it in a water bath to a temperature of 15°C. Add 10g of refined cotton below % into the beaker, stir and take it out after nitration reaction for 45 minutes, then carry out acid boiling and alkali boiling in sequence. ~90°C, time 2h, control the alkalinity of alkali boiling below 0.15g / l (calculated by sodium carbonate), temperature 85°C~90°C, time 2h, after fine-cut fine washing, the ultra-high viscosity cellulose can be produced Nitrates.

[0030] The nitrogen content of the cellulose nitrate obtained in the present embodiment is 197.8ml / g, viscosity 6788mpa.s, alcohol ether solubility, fineness and stability all meet the requirements, and can be used for colloidal explosives for underwater blasting Production.

Embodiment 2

[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 26.44% nitric acid, 57.33% sulfuric acid, and 15.34% moisture, and heat it in a water bath to a temperature of 13°C, then dry the mixture with a moisture content of 10 Add 10g of refined cotton below % into the beaker, stir and take it out after nitration reaction for 45 minutes, then carry out acid boiling and alkali boiling in sequence. ~90°C, time 2h, control the alkalinity of alkali boiling below 0.15g / l (calculated as sodium carbonate), temperature 85°C~90°C, time 2h, after finely breaking, the ultra-high viscosity cellulose nitrate can be obtained.

[0033] The nitrogen content of the cellulose nitrate obtained in the present embodiment is 195.7ml / g, viscosity 7011mpa.s, alcohol ether solubility, fineness and stability all meet the requirements, and can be used for colloidal explosives for underwater blasting...

Embodiment 3

[0035] Add 500g of mixed acid into a 1000ml beaker equipped with mechanical stirring, wherein the mass fraction of each component in the mixed acid is 25.56% nitric acid, 57.51% sulfuric acid, and 15.99% moisture, and heat it in a water bath to a temperature of 13°C. Add 10g of refined cotton below % into the beaker, stir and take it out after nitration reaction for 45 minutes, then carry out acid boiling and alkali boiling in sequence. ~90°C, time 2h, control the alkalinity of alkali boiling below 0.15g / l (calculated by sodium carbonate), temperature 85°C~90°C, time 2h, after finely breaking, the ultra-high viscosity cellulose nitrate can be produced. It can be used in the production of colloidal explosives for underwater blasting.

[0036] The nitrogen content of the cellulose nitrate prepared in this embodiment is 195.4ml / g, the viscosity is 7321mpa.s, the alcohol ether solubility, fineness and stability all meet the requirements.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing superhigh-viscosity energy-containing cellulose nitrate and belongs to the technical field of cellulose ester preparation. The technical scheme of the invention is as follows: adding refined cotton in mixed acid at the temperature of 10-20 DEG C, and washing after nitration reaction so as to obtain nitrated refined cotton, wherein the mixed acid contains 26.00wt%-35.00wt% of nitric acid, 45wt%-61wt% of sulfuric acid and 13.00wt%-20.00wt% of water; after washing, boiling and washing the nitrated refined cotton at the temperature of 80-90 DEG C, and shredding so as to obtain cellulose nitrate with a nitration degree of above 194ml / g and a viscosity (an acetone solution containing 3% cellulose nitrate) of more than 6000mpa.s. The method can be used for production of gelatine explosives for underwater blasting.

Description

technical field [0001] The invention relates to a method for preparing ultra-high viscosity cellulose nitrate, belonging to the technical field of cellulose ester preparation. Background technique [0002] Traditional cellulose nitrate is often used in civilian fields such as coatings, paints, inks, plastics, and military fields such as gun propellants. The viscosity is generally low, and the highest is no more than 1500mpa.s. [0003] Ultra-high-viscosity cellulose nitrate, commonly known as explosive cotton, also known as nitrocellulose for colloidal explosives, mainly acts as a gel in colloidal explosives. It absorbs nitroglycerin and then mixes it with oxidants, combustibles, and additives. Plastomer, and kneaded into shape, widely used in rock blasting and underwater blasting engineering. [0004] Due to the great power of colloidal explosives widely used in industrial blasting, as the most critical gelling agent in colloidal explosives, blasting cotton has extremely s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08B5/02
Inventor 赵利斌王维智郭朝刚程从勇张尧蔺志强
Owner SICHUAN NITROCELLULOSE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com