Patent Number: 6,294,699

Title: Oxidation of mercaptans to organic disulfides

Abstract: A process useful for producing an organic disulfide is disclosed. The process can include contacting mercaptans with a solid catalyst selected from the group consisting of a Group IIA metal oxide; 2) an alumina material consisting essentially of alumina; 3) an impregnated alumina impregnated with a metal selected from the group consisting of cobalt, molybdenum, tungsten, nickel and combinations of any two or more thereof; 4) an acidic ion-exchange resin; 5) a basic ion-exchange resin; and 6) combinations of any two or more thereof; in the presence of sulfur dioxide and in the substantial absence of a liquid oxidation catalyst to thereby produce organic disulfides. Alternatively, the process can include contacting mercaptans with a solid catalyst selected from the group consisting of 1) a Group IIA metal oxide; 2) alumina; 3) an impregnated alumina impregnated with a metal selected from the group consisting of cobalt, molybdenum, tungsten, nickel and combinations of any two or more thereof; 4) an acidic ion-exchange resin; 5) a basic ion-exchange resin; and 6) combinations of any two or more thereof; in the presence of sulfur dioxide, in the presence of an oxygenated hydrocarbon, and, optionally, in the substantial absence of a liquid oxidation catalyst, to thereby produce organic disulfides.

Inventors: Refvik; Mitchell D. (Bartlesville, OK), Shaw; James Edward (Bartlesville, OK)

Assignee: Richmond, Hitchcock, Fish & Dollar

International Classification: C07C 319/00 (20060101); C07C 319/24 (20060101); C07C 321/00 (20060101); C07C 321/14 (20060101); C07C 321/00 ()

Expiration Date: 09/25/2018