Location History:
- Matsuyama, JA (1976 - 1977)
- Matsuyama, JP (1979 - 1983)
Company Filing History:
9 out of 9 
1 out of 32 Years Active: 1976-1983
Title: Motoo Shigeyasu: Innovator in Aromatic Dicarboxylic Acid Production
Introduction
Motoo Shigeyasu is a prominent inventor based in Matsuyama, Japan. He has made significant contributions to the field of chemical engineering, particularly in the production of high-purity terephthalic acid and aromatic dicarboxylic acids. With a total of 9 patents to his name, Shigeyasu's work has had a lasting impact on the petrochemical industry.
Latest Patents
One of Shigeyasu's latest patents is a process for the continuous production of high-purity terephthalic acid. This innovative method involves continuously introducing p-dialkylbenzene as a feed material along with a solvent and an oxidation catalyst into a reactor. The process allows for the liquid phase oxidation of p-dialkylbenzene with oxygen, resulting in the production of terephthalic acid. The reaction mixture is then oxidized in a stabilizer for an extended period, ensuring high purity and efficiency.
Another notable patent is for a process and apparatus for producing aromatic dicarboxylic acids. This method involves oxidizing a benzene derivative with molecular oxygen in a lower aliphatic carboxylic acid solvent, using an oxidation catalyst. The starting material is fed into the reaction system in a uniformly dispersed state, leading to the production of high-purity aromatic dicarboxylic acids with excellent color quality.
Career Highlights
Shigeyasu has worked with several notable companies, including Matsuyama Petrochemicals Inc. and Maruzen Oil Co. Ltd. His expertise in chemical processes has been instrumental in advancing production techniques within these organizations.
Collaborations
Throughout his career, Shigeyasu has collaborated with esteemed colleagues such as Takehiko Kitamura and Michio Kuki. These partnerships have fostered innovation and contributed to the development of new technologies in the field.
Conclusion
Motoo Shigeyasu's contributions to the production of aromatic dicarboxylic acids and high-purity terephthalic acid have established him as a key figure in the petrochemical industry. His innovative processes and collaborations continue to influence advancements in chemical engineering.