Minoru Koshibe

Title: Minoru Koshibe: Innovator in Methacrylic Acid Purification

Introduction

Minoru Koshibe is a notable inventor based in Sakai, Japan. He has made significant contributions to the field of chemical engineering, particularly in the purification processes of methacrylic acid and methyl methacrylate. With a total of four patents to his name, Koshibe's work has had a substantial impact on the industry.

Latest Patents

One of his latest patents involves a purification process for methacrylic acid. This innovative process effectively removes dibasic acids and aldehydes that are present in trace amounts as impurities. The method utilizes crude methacrylic acid obtained from the vapor-phase catalytic oxidation of isobutylene, tertiary butanol, methacrolein, or isobutyl aldehyde. It treats the acid with specific compounds, followed by distillation, which may include the presence of p-phenylenediamine.

Another significant patent focuses on the purification and preparation processes for methyl methacrylate (MMA). This process involves azeotropic distillation with hexane to obtain MMA that is substantially free of water and other impurities. Additionally, it outlines a method for recovering methanol from the water phase after separation.

Career Highlights

Throughout his career, Minoru Koshibe has worked with prominent companies such as Mitsui Toatsu Chemicals, Incorporated and Kuraray Co., Ltd. His expertise in chemical processes has been instrumental in advancing the methodologies used in the industry.

Collaborations

Koshibe has collaborated with notable colleagues, including Katsuji Yoguchi and Morimasa Kuragano. Their combined efforts have contributed to the development of innovative solutions in chemical engineering.

Conclusion

Minoru Koshibe's contributions to the purification processes of methacrylic acid and methyl methacrylate highlight his role as a significant inventor in the field. His patents reflect a commitment to innovation and excellence in chemical engineering.