Betzdearborn, Inc.

Betz Laboratories, Inc.

William L Witzig

Bruce E Wright

William S Carey

Alan E Goliaszewski

Scott Eric Lehrer

Jeffrey H Peltier

Methods are provided for cleaning and inhibiting the formation of fouling deposits on jet engine components during the combustion of turbine combustion fuel oils. Methods are also provided for inhibiting the formation and emission of soot and smoke from jet engine exhaust during turbine combustion fuel oil combustion. The methods employ a derivative of polyalkenylthiophosphonic acid added to the turbine combustion fuel oil. The preferred derivative is pentaerythritol ester of polyisobutenylthiophosphonic acid.

Methods for reducing fouling deposit formation in jet engines

A method for inhibiting hydrogen sulfite evolution from molten sulfur is disclosed. The method involves adding a hypohalide to molten sulfur containing hydrogen sulfite. The hypohalide, such as hypochlorite, hyprobromite, and their sodium or calcium salts inhibit the evolution of hydrogen sulfite from molten sulfur.

Selective oxidation of hydrogen sulfide in molten sulfur

Methods are provided for cleaning and inhibiting the formation of fouling deposits on jet engine components during the combustion of turbine combustion fuel oils. Methods are also provided for inhibiting the formation and emission of soot and smoke from jet engine exhaust during turbine combustion fuel oil combustion. The methods employ a derivative of polyalkenylthiophosphonic acid added to the turbine combustion fuel oil. The preferred derivative is pentaerythritol ester of polyisobutenylthio-phosphonic acid.

Methods and compositions are provided for cleaning and inhibiting the formation of fouling deposits on jet engine components during the combustion of turbine combustion fuel oils. Methods and compositions are also provided for inhibiting the formation and emission of soot and smoke from jet engine exhaust during turbine combustion fuel oil combustion. The methods employ a derivative of (thio)phosphonic acid added to the turbine combustion fuel oil. The preferred derivative is pentaerythritol ester of polyisobutenylthiophosphonic acid.

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Montgomery, TX, United States of America

William L Witzig