AN 2002 0095966 Highsmith Honeywell Ammonium Sulfate Nitrate
Ammonium sulfate nitrate composite materials useful as fertilizers having desirable levels of nitrate ions, superior stability against detonation, higher density, greater resistance to moisture, and a method for their manufacture. The ammonium sulfate nitrate composites have as essential constituents ammonium sulfate and the NH4SO4.2(NH4NO3) double salt with less than 5 wt.% in combined total of the more hazardous NH4SO4.3(NH4NO3) double salt and ammonium nitrate.
The composites of the invention are formed by reacting ammonium sulfate with ammonium nitrate in a molar ratio of about 0.9:1 to about 1.1:1 in the presence of a small amount of water in a narrow range of temperatures and then cooling to solidification at a sufficiently rapid rate to prevent macroscopic segregation of the reaction products.
AN 2002 0095966 Highsmith Honeywell Ammonium Sulfate Nitrate.pdf