Method for preparing superhigh-viscosity energy-containing cellulose nitrate

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...