Syuichiro Sanpei

Title: Syuichiro Sanpei: Innovator in Diphenyl Sulfone Production

Introduction

Syuichiro Sanpei is a notable inventor based in Fukushima, Japan. He has made significant contributions to the field of chemical processes, particularly in the production of diphenyl sulfone compounds. With a total of 2 patents to his name, Sanpei's work is recognized for its productivity and efficiency.

Latest Patents

Sanpei's latest patents focus on industrial processes for producing diphenyl sulfone compounds. One of his notable inventions is a process for producing 4-isopropoxy-4'-hydroxydiphenyl sulfone, which serves as a developer for leuco dyes used in thermosensible papers. This process is distinguished by its excellent productivity, economical efficiency, and safety. It allows for the production of compounds from readily available raw materials. The innovation improves upon prior art by utilizing isopropyl iodide, which is more reactive than isopropyl bromide, thereby shortening production time. Another patent involves a process for producing compounds of general formula (II), also useful as developers for leuco dyes. This method enhances productivity and safety by incorporating an iodine recovery step, allowing for the complete recovery and reuse of iodine from manufacturing wastewater.

Career Highlights

Syuichiro Sanpei is associated with Nippon Soda Co., Ltd., where he has contributed to advancements in chemical manufacturing processes. His work has been pivotal in enhancing the efficiency and safety of industrial production methods.

Collaborations

Sanpei has collaborated with notable coworkers, including Masayuki Hanzawa and Yasuyuki Suzuki, who have also contributed to the field of chemical innovations.

Conclusion

Syuichiro Sanpei's contributions to the production of diphenyl sulfone compounds highlight his innovative spirit and commitment to improving industrial processes. His patents reflect a dedication to enhancing productivity and safety in chemical manufacturing.