Glycerine dynamite

As already mentioned above, the purity of the glycerine exerts a fundamental influence on the efficiency and safety of nitroglycerine manufacture. The so-called dynamite glycerine, a very pure water-free product, distilled several times under reduced pressure is produced for manufacture of nitroglycerine. 

According to the standards applicable in different countries, dynamite glycerine should meet the following requirements ... 

Treatment of Lyes—Evaporation to Crude Glycerine—Distillation—Distilled and Dynamite Glycerine—Chemically Pure Glycerine—Animal Charcoal for De-colorisation—Glycerine obtained by other Methods of Saponification—Yield of Glycerine from Fats and Oils. 

When sufficiently concentrated the glycerine may be decolorised, if necessary, by treating with 1 per cent, animal charcoal and passing through a filter press, from which it issues as dynamite glycerine... 

Dynamite glycerine should bo free from arsenic, lime, chlorides, and fatty acids, the inorganic matter should not amount to more than 0 1 per cent., and a K)rtion diluted and treated with nitrate of silver solution should give no turbidity or discoloration in ten minutes. The specific gravity should he 1 262 at 15 0. (59 T.) and the colour somewhat yellow. 

Theoretically 100 grm. glycerine should yield 246-7 grm. nitro-glycerine. But dynamite glycerine is never pure, and there is besides sonie loss in nitration, but the yield should be at least 207 to... 

Under the title Ein Beitrag zur Benrteilung des Dynamit-glycerins, Franz Hofwimmer, Vienna, publishes in the Chemiker Zeitung, No. 5, 1912, the following —... 

Although most dynamite glycerines answer these requirements, they notwithstanding often leave much to be desired on nitration as regards yield cf nitroglycerine, for which reason the usual tuethods of... 

The apparatus permits in an hour an exact estimation to be easily carried out, which represents an advantage over other methods not to be despised, and, since in the purchase cf dynamite glycerine... 

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