PROCESS FOR THE PREPARATION OF AMMONIUM THIOSULFATE

摘要

The process includes the steps of; (a) oxidizing hydrogen sulfide and ammonia with air or oxygen in heterogeneous oxidation catalyst reactor(A); (b) condensing the product by condenser(B) and separating the condensed mixture solution into ammonium thiosulfate and sulfur by solid-liquid separator(c); (c) recovering the concentrated or crystallized ammonium thiosulfate by filtering and concentrating the separated ammonium thiosulfate; (d) recycling the ammonia, evaporated from the concentrator(E), and recycling the hydrogen sulfide made by hydrogenating the sulfur produced as a byproduct in hydrogenation catalyst reactor.