Nitro-explosives; a practical treatise concerning the properties, manufacture, and analysis of nitrated substances, including the fulminates, smokeless powders, and celluloid by Sanford P. Gerald (Percy Gerald)

Author:Sanford, P. Gerald (Percy Gerald)
Language: eng
Format: epub
Tags: Explosives, Smokeless powder, Celluloid
Publisher: New York, D. Van Nostrand Co.; London, Crosby Lockwood and son
Published: 1906-03-25T05:00:00+00:00

filtrate to dryness in a platinum dish. Dry and weigh. This equals the Ba(NO 3 ) 2 . If the sample is tonite No. 3, and contains di-nitro-benzol, treat first with ether to dissolve out this substance. Filter into a dish, and evaporate off the ether, and weigh the di-nitro-benzol, and afterwards treat residue with water as before. The residue is dried and weighed, and equals the gun-cotton present. It should then be treated with a solution of ether-alcohol in a conical flask, allowed to stand some three hours, then filtered through a weighed filter paper, dried at 40° C., and weighed. This will give the gun-cotton, and the difference between this last weight and the previous one will give the collodion-cotton. A portion of the residue containing both the gun-cotton and soluble cotton can be tested in the nitrometer, and the nitrogen determined.

Cordite. —This explosive consists of gun-cotton (with a little collodion-cotton in it as impurity), nitro-glycerine, and vaseline—the proportions being given as 58 percent, nitro-glycerine, 37 per cent, gun-cotton, and 5 per cent, vaseline. Its analysis is performed by a modification of the method given for gelatines. Five grms. may be dissolved in ether-alcohol in a conical flask, allowed to stand all night, and then filtered through a linen filter. The residue is washed with a little ether, pressed, and dried at 40° C., and weighed. It equals the gun-cotton. The solution contains the nitro-glycerine, soluble cotton, and vaseline. The cotton is precipitated with chloroform, filtered off, dried, and weighed. The two ether-alcohol solutions are mixed, and carefully evaporated down in a platinum dish upon the water bath at a low temperature. The residue is afterwards treated with strong 80 per cent, acetic acid, which dissolves out any nitro-glycerine left in it. The nitro-glycerine is then obtained by difference.

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