Fumio Shimizu

Title: Fumio Shimizu: Innovator in Agricultural Chemistry

Introduction

Fumio Shimizu is a notable inventor based in Shizuoka, Japan. He has made significant contributions to the field of agricultural chemistry, particularly through his innovative patent related to thiophosphates. His work has implications for both agricultural and horticultural practices.

Latest Patents

Fumio Shimizu holds a patent for a process for the preparation of O,O-dialkyl-S-benzyl thiophosphates. This process involves reacting a diester of phosphorous acid, such as dimethyl phosphite or diethyl phosphite, with sulfur and an alkali or alkaline earth metal hydroxide or oxide. The reaction takes place in an organic solvent, such as toluene or xylene, which is sparingly soluble or insoluble in water. The resulting product is extracted with water and then reacted with a benzyl halide. This method allows for the industrial production of O,O-dialkyl-S-benzyl thiophosphates, which are useful as bactericidal and insecticidal agents in agriculture, achieving high purity and yield.

Career Highlights

Fumio Shimizu is associated with Ihara Chemical Kogyo Kabushiki Kaisha, where he has been able to apply his expertise in chemical processes. His innovative approach has contributed to advancements in agricultural chemicals, enhancing the effectiveness of pest control methods.

Collaborations

Fumio has worked alongside notable colleagues such as Zenichi Sato and Shoji Kusano. Their collaborative efforts have furthered research and development in the field of agricultural chemistry.

Conclusion

Fumio Shimizu's contributions to the field of agricultural chemistry through his patent on thiophosphates highlight his role as an innovator. His work not only advances scientific knowledge but also provides practical solutions for agricultural challenges.