Hycon
Hycon : (1) Hydrogen Conversion. A hydrogenation process for converting high-sulfur petroleum residues to clean transport fuels. Sulfur is removed as hydrogen sulfide. Two catalytic stages are used. The first achieves demetallization with a regenerable catalyst. The second achieves HDS, HDN, and partial hydrocracking. (2) A process for making nitric acid which can provide a range of concentrations