METHODS FOR PREPARING WATER-RESISTANT AMMONIUM NITRATE FOR MANUFACTURING EXPLOSIVES Russian patent published in 2008 - IPC C01C1/18 C06B31/28 

FIELD: explosives.

SUBSTANCE: invention is directed to creation of special types of starting material and its production technology for manufacturing explosives. Three variants of water-resistant ammonium nitrate preparation method are proposed. Method according to variant 1 comprises treatment of ammonium nitrate granules with mineral-organic emulsion consisting of (i) mineral phase, which contains iron alum and is obtained from ammonium nitrate, ferric sulfate solution, and sodium hydroxide solution; (ii) organic phase containing solid paraffin and natural stearin; and (iii) emulsion stabilizer, followed by drying and grinding. Method according to variant 2 comprises treatment of ammonium nitrate granules with iron alum solution obtained from ferric sulfate, ammonium nitrate, and sodium hydroxide and having pH 1.5 to 2.5, followed by drying, treatment of granules with organic waterproofing agent containing solid paraffin and natural stearin, subsequent drying and grinding. Method according to variant 3 comprises treatment of ammonium nitrate granules with mineral-organic mixture containing iron alum and obtained by mixing ammonium nitrate, ferric sulfate solution, sodium hydroxide solution, solid paraffin, and natural stearin followed by drying and grinding.

EFFECT: enabled preparation of waster-resistant ammonium nitrate with increased degree of water resistance (70-90 cm torr).

3 cl, 3 tbl, 3 ex