Carbon treatment of reclaimed ammonium perchlorate
AssigneeThiokol Corporation
InventorsKathryh F. Miks, Dennis J. Fife, Steven J. Bradley
Life of this patent
Estimating the term…
Abstract
A process for treating reclaimed ammonium perchlorate with carbon to produce rounded particles upon recrystallization is disclosed. In the process, a recovered ammonium perchlorate solution is contacted with activated carbon, preferably by passage through a packed column. Contamination that modifies the ammonium perchlorate crystal habit and causes rhombic-shaped ammonium perchlorate particles is removed by activated carbon. The carbon-treated ammonium perchlorate solution produces rounded AP particles upon recrystallization with mechanical agitation.
Claims17
A process of reclaiming ammonium perchlorate comprising the steps of:
- (a) obtaining an ammonium perchlorate solution;
- (b) contacting the ammonium perchlorate solution with activated carbon;
- and
- (c) recrystallizing the ammonium perchlorate solution.
A process of reclaiming ammonium perchlorate comprising the steps of:
- (a) obtaining an ammonium perchlorate solution containing contaminants capable of modifying the ammonium perchlorate crystal habit and forming atypical shaped ammonium perchlorate particles upon recrystallization;
- (b) contacting the ammonium perchlorate solution with activated carbon, wherein the ammonium perchlorate solution and the activated carbon are heated during the contacting step to prevent premature precipitation of ammonium perchlorate;
- and
- (c) exceeding the saturation limit of the ammonium perchlorate solution to cause recrystallization of ammonium perchlorate in the ammonium perchlorate solution.
Dependencies are inferred from the claim text.