TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The hydrothermal reaction is carried out in the presence of a catalyst containing active ingredient, and support having sulfur or a sulfur compound. The catalyst is obtained by processing the catalyst with the support.Preferred Compounds: The sulfur compound is sulfide salt, sulfate, sulfite, thiosulfate, disulfate, disulfite, dithionate, dithionite, trithionic acid salt, peroxo monosulfate, tetrathionic acid salt, peroxo disulfate, polythionic acid salt, alkali metal sulfate and/or alkaline earth metal sulfate. The active ingredient is ruthenium, palladium, rhodium, platinum, gold, iridium, osmium, iron, copper, zinc, nickel, cobalt, manganese, cerium and/or its water-insoluble or poor water-soluble compound.Preferred Support: The support is titania, zirconia, titania-zirconia, alumina, silica, alumina-silica and/or activated carbon.Preferred Conditions: The hydrothermal reaction is performed at temperature of 300-500degreesC and pressure of 20-40 MPa.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The hydrothermal reaction is carried out in the presence of a catalyst containing active ingredient, and support having sulfur or a sulfur compound. The catalyst is obtained by processing the catalyst with the support.Preferred Compounds: The sulfur compound is sulfide salt, sulfate, sulfite, thiosulfate, disulfate, disulfite, dithionate, dithionite, trithionic acid salt, peroxo monosulfate, tetrathionic acid salt, peroxo disulfate, polythionic acid salt, alkali metal sulfate and/or alkaline earth metal sulfate. The active ingredient is ruthenium, palladium, rhodium, platinum, gold, iridium, osmium, iron, copper, zinc, nickel, cobalt, manganese, cerium and/or its water-insoluble or poor water-soluble compound.Preferred Support: The support is titania, zirconia, titania-zirconia, alumina, silica, alumina-silica and/or activated carbon.Preferred Conditions: The hydrothermal reaction is performed at temperature of 300-500degreesC and pressure of 20-40 MPa.