YIELD AND PURITY OF ADN DEPENDING ON POTASSIUM SULFAMATE

摘要

Ammonium dinitramide (ADN), which is one of the most promising oxidizers in propellants without chlorinated pollution to the atmosphere, has attracted a significant attention. Potassium sulfamate (PS) is one of key substancesthroughout the ADN synthesis as formingnitrates such as -N(NO2)2. In this work, potassium sulfamate as a starting material was prepared in a lab scale through crystallizationwith adding ethanol,methanol, acetone and isopropanol and their mixtures. The effects of PS on the ADN yield and purity were evaluated by IR, UV, XRD and TGA-DSC techniques. The lab-made PSs quite fitted to the commercial PS in its chemical structure. The PS with acetone and/or mixture of acetone and isopropanol, which was ground to 20 urn, showed the highest yield more than 48%. The purity obtained from the test PS also was better than a commercial product. It would closely be associated with crystallinity, porosity and pore size of sample PS.