METHOD FOR PREPARING POROUS GRANULATED AMMONIUM NITRATE Russian patent published in 2005 - IPC

FIELD: inorganic chemistry, chemical technology.

SUBSTANCE: invention relates to manufacturing explosive materials, namely, to manufacturing porous granulated ammonium nitrate used in manufacturing the simplest explosive substances and emulsion explosive substances. Invention proposes a method for preparing porous granulated ammonium nitrate involves preparing ammonium nitrate solution, addition of stabilizing additive consisting of magnesium and/or calcium nitrate to solution up to the concentration 2 wt.-% as measured for anhydrous product followed by evaporation of ammonium nitrate solution to obtain melt and addition pore-forming addition and disperser NS to it and the following granulation of product. Highly concentrated ammonium carbonate solution in ammonium nitrate is used as pore-forming additive in the amount 0.05-0.35 wt.-%, or mixture of carbamide with highly concentrated ammonium carbonate in ammonium nitrate in the amount 0.1-0.55 wt.-%. Pore-forming additive is mixed with disperser NS in melt or before their addition in melt. Invention provides the development of a method for preparing porous granulated ammonium nitrate of reduced caking and possibility for regulation of oil absorption and filled density.

EFFECT: improved preparing method.

3 cl, 1 tbl, 1 ex