The Merox process is an efficient and economical catalytic process developed for the chemical treatment of petroleum fractions to remove sulfur present as mercaptans (Merox extraction) or to directly convert mercaptan sulfur to less objectionable disulfides (Merox sweetening). This process is used for liquid-phase treating of liquefied petroleum gases (LPG), natural-gas liquids (NGL), naphtha, gasolines, kerosene, jet fuels, and heating oils. It also can be used to sweeten natural gas, refinery gas, and synthetic gas in conjunction with conventional pretreatment and posttreatment processes.