Process to remove olefins from light hydrocarbon stream by mercaptanization followed by MEROX removal of mercaptans from the separated stream

A process for treating an olefin-containing light naphtha feedstock, the process comprising:

• a. introducing the light naphtha feedstock containing olefins, an internally-produced mercaptan stream and an alkali caustic solution into a mercaptan oxidation treatment zone to produce a spent caustic and alkali metal alkane thiolate mixture stream and sweet light naphtha product stream that is substantially mercaptan free and comprises olefins;
• b. passing the spent caustic and alkali metal alkane thiolate mixture stream, catalyst, and air into a wet air oxidation zone to produce a regenerated spent caustic stream and a disulfide oils product stream;
• c. recovering the disulfide oils product stream;
• d. passing the sweet light naphtha product stream and hydrogen sulfide into a mercaptanization zone containing a catalyst and catalytically reacting hydrogen sulfide with the olefins to produce a treated effluent stream that is substantially free of olefins;
• e. passing the treated effluent stream to a fractionation zone and recovering a sweet light naphtha product stream and the internally-produced mercaptan stream of step (a).