Hiroshi Ishimi

Title: Hiroshi Ishimi: Innovator in Aluminum Fluoride Recovery

Introduction

Hiroshi Ishimi is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of chemical engineering, particularly in the recovery of aluminum fluoride from fluorine-containing aqueous solutions. His innovative methods have implications for various industrial processes.

Latest Patents

Hiroshi Ishimi holds a patent for a method of recovering aluminum fluoride from fluorine-containing aqueous solutions. The patent describes a process for converting uranium hexafluoride (UF₆) into uranium dioxide (UO₂). In this process, UF₆ is brought into contact with an aqueous aluminum nitrate solution. The resultant product undergoes solvent extraction with tributyl phosphate to remove uranyl nitrate. The raffinate produced has a fluorine/aluminum (F/Al) weight ratio ranging from about 0.5 to about 1.2. A sufficient quantity of hydrofluoric acid is then added to minimize the solubility of aluminum fluoride (AlF₃) and maximize its precipitation potential. This treatment results in the separation of an uranium-containing aqueous solution and an AlF₃ precipitate that contains substantially no uranium.

Career Highlights

Hiroshi Ishimi is associated with Sumitomo Metal Mining Company, Ltd., where he has applied his expertise in chemical processes. His work has contributed to advancements in the recovery and processing of valuable materials, enhancing the efficiency of industrial operations.

Collaborations

Hiroshi has collaborated with notable colleagues such as Hisaaki Shimauchi and Chuzaburo Tanaka. Their combined efforts have fostered innovation and development in their respective fields.

Conclusion

Hiroshi Ishimi's contributions to the field of chemical engineering, particularly in aluminum fluoride recovery, highlight his role as an influential inventor. His patented methods demonstrate the potential for improving industrial processes and resource recovery.