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Examples
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Acetone, and acetic-ether (ethyl-acetate) may also be used as solvents for the nitro-cellulose.
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He incorporates these materials with nitro-cellulose, and dissolves the whole in acetone, which is afterwards distilled off.
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~Greiner's Powder~ consists of nitro-cellulose, nitro-benzol, graphite, and lampblack.
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Personally, I have never been able to obtain satisfactory results with this process in the analysis of nitro-cellulose, and I am of opinion that the process does not possess any advantage over the nitrometer method, at any rate for the analysis of gun-cotton.
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In fact, chemists are now more inclined to divide nitro-cellulose into the soluble and insoluble forms, the reason being that it is quite easy to make a nitro-cellulose entirely soluble in a mixture of ether-alcohol, and yet containing as high a percentage of nitrogen as 12.6; whereas the di-nitrate [A] should theoretically only contain 11.11 per cent.
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The diamyl phthalate is added, with or without the mineral jelly to nitro-glycerine and nitro-cellulose.
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The process of manufacture is briefly as follows: [A] -- The soluble and insoluble nitro-cellulose are dried separately at a temperature from 38° to 41° C., until they do not contain more than 0.1 per cent. of moisture.
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Nitro-lignine is only nitro-cellulose made from wood instead of cotton; and nitro-straw is also only nitro-cellulose.
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~ -- The simplest of these compounds is, of course, blasting gelatine, as it consists of nothing but nitro-cotton and nitro - glycerine, the nitro-cellulose being dissolved in the glycerine to form a clear jelly, the usual proportions being about 92 per cent. of nitro - glycerine to 8 per cent. nitro-cotton, but the cotton is found as high as
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It has no effect upon cellulose, but decomposes nitro-cellulose with the formation of a reddish brown compound, which is soluble in water.
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