Harold Raffelson

Title: Harold Raffelson: Innovator in Catalysis

Introduction

Harold Raffelson is a notable inventor based in St. Louis, MO (US), recognized for his contributions to the field of catalysis. He holds a total of nine patents, showcasing his innovative approach to chemical processes.

Latest Patents

Raffelson's latest patents include a process for preparing phosphorus-vanadium mixed oxide oxidation catalysts. This process involves introducing a substantially pentavalent vanadium-containing compound and a pentavalent phosphorus-containing compound into an alcohol medium. This medium is capable of reducing the vanadium to a valence state less than +5 in the presence of an alcohol-modifying agent, forming a phosphorus-vanadium mixed oxide catalyst precursor. The catalyst precursor is then recovered, dried, formed into desired structures, and calcined at temperatures ranging from about 250°C to about 600°C. These catalysts are highly effective, exhibiting a weight/weight productivity of at least 70 grams of maleic anhydride per kilogram of catalyst per hour. Another significant patent involves the process for producing maleic anhydride, which is achieved by oxidizing a non-aromatic hydrocarbon with molecular oxygen in the presence of the aforementioned phosphorus-vanadium mixed oxide oxidation catalyst.

Career Highlights

Harold Raffelson has made significant strides in his career, particularly through his work at Monsanto Company. His innovative methods have contributed to advancements in chemical manufacturing and catalysis.

Collaborations

Raffelson has collaborated with notable coworkers, including Ramon A Mount and James T Wrobleski, further enhancing the impact of his work in the field.

Conclusion

Harold Raffelson's contributions to catalysis and chemical processes have established him as a prominent inventor in his field. His innovative patents continue to influence the industry and demonstrate the importance of research and development in chemical engineering.