Philippe Fresnel

Title: Philippe Fresnel: Innovator in Sulfoxide Production

Introduction

Philippe Fresnel is a notable inventor based in Castres, France. He has made significant contributions to the field of chemistry, particularly in the production of dialkyl-sulfoxides. His innovative approach addresses challenges faced in the separation of sulfoxides from their reaction mediums.

Latest Patents

Fresnel holds a patent for an improved method of producing dialkyl-sulfoxides by oxidizing corresponding dialkyl-sulfides with hydrogen peroxide in an aqueous acidic medium. This method remedies the drawbacks of similar prior art concerning the separation of the sulfoxide formed from its reaction medium. The new technique allows for the easy recovery of sulfoxides in a state of good purity. The improvement involves mixing the reaction medium with a large proportion of a solvent that can yield an azeotropic mixture with water. After oxidation, the water is removed by distillation as an azeotropic mixture. Heptane is identified as a particularly useful solvent in this process. When an excess of the solvent is used, a slurry of sulfoxide and solvent is obtained, which is easy to separate.

Career Highlights

Philippe Fresnel is associated with the Société Nationale des Pétroles d'Aquitaine, where he has applied his expertise in chemical processes. His work has contributed to advancements in the production methods of important chemical compounds.

Collaborations

Fresnel has collaborated with notable coworkers, including Bernard Tramier and Raymond Delourme, enhancing the innovative efforts within his field.

Conclusion

Philippe Fresnel's contributions to the production of dialkyl-sulfoxides demonstrate his innovative spirit and commitment to improving chemical processes. His patent reflects a significant advancement in the field, showcasing the importance of innovation in chemistry.