Diamond Shamrock Corporation

Diamond Shamrock Chemicals Company

Thomas J Gilligan, Iii

Arnold Z Gordon

Andrew D Babinsky

Thomas G Strempel

Martin M Dorio

The present invention relates to a process for scavenging hydrogen sulfide which frequently becomes entrained in drilling fluid during the course of drilling operations through subterranean formations. The process consists of introducing a solid oxidant in powdered form into the circulating drilling fluid when hydrogen sulfide is encountered. The solid oxidants are selected from the group consisting of calcium hypochlorite (Ca(OCl).sub.2), sodium perborate (NaBO.sub.3), potassium permanganate (KMnO.sub.4), and potassium peroxydisulfate (K.sub.2 S.sub.2 O.sub.8). The solid oxidants are soluble in the drilling fluid, promoting fast and complete scavenging reactions without adversely altering the drilling fluid rheology.

Removal of hydrogen sulfide from drilling fluids

A device for the simultaneous conversion of light energy into electrical energy and thermal energy utilizing a liquid-junction semiconductor photocell (PEC) utilizing a novel photoactive true solid/solid solution semiconductor mixed metal oxide material electrode so as to adjust the band gap and/or optical response properties of the electrode to be more closely attuned to the major output portion of the solar spectrum as well as lowering the cost of production and being environmentally sound.

Device for the simultaneous production of electricity and thermal energy

The invention is directed to an electrolytic process for converting alkali metal carbonates to alkali metal hydroxides at high current efficiencies.

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Painesville, OH, United States of America

Thomas J Gilligan, Iii