Process Engineering Design for Manufacture of Guanidine Nitrate. Volume I
HERCULES INC KENVIL NJ
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The object of this program was to develop design data and produce 40, 500 lb of guanidine nitrate GN via the catalytic reaction of ammonium nitrate AN and urea. Laboratory and pilot plant experiments confirmed the soundness of the process as described in the literature. Mathematical models and computer programs developed on the basis of laboratory kinetic and process variable data proved to be fully capable in predicting the behavior of packed bed tubular reactors. A semi-continuous pilot plant nomial capacity of 50 lb GNhr was constructed on the basis of laboratory data. About one ton of 96 purity GN was produced using a single aqueous crystallization step for product recovery. Total production was not met because of catalyst poisoning, which was traced to phosphates and perhaps borates in commercial grade AN. Sensitivity and hazards analyses show that no in-process material is capable of self-propagation. Preliminary economic studies indicate cost advantages over the British aqueous fusion process. Continuation of pilot plant operations to extend catalyst mileage data, particularly with recycle, and more detailed cost analysis are recommended.
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