Company Filing History:
Years Active: 1976
Title: The Innovative Contributions of Toshiko Honda in Chemical Process Patents
Introduction: Toshiko Honda is a distinguished inventor based in Osaka, Japan, renowned for her significant contribution to the field of chemical processes. She holds a patent for a novel method of preparing cis-chrysanthemic acid that showcases her innovative approach to solving complex problems in chemical manufacturing.
Latest Patents: Toshiko Honda's patent, titled "Process for preparing cis-chrysanthemic acid," involves a well-defined three-step procedure. The process begins with the hydrolysis of trans-δ-halogenodihydrochrysanthemic acid or its ester under neutral conditions using an alkaline earth metal carbonate. Next, the resulting trans-δ-hydroxydihydrochrysanthemic acid ester is converted into a mixture containing cis-chrysanthemic acid and iso-cis-chrysanthemic acid through reaction with a strong base. Finally, cis-chrysanthemic acid is separated from the mixture by selectively converting iso-cis-chrysanthemic acid with water in the presence of an acid catalyst into cis-dihydrochrysanthemolactone, followed by the separation of cis-chrysanthemic acid using caustic alkali and acid. This innovative process holds significant value in converting trans-chrysanthemic acid into its industrially valuable cis counterpart, especially for the production of effective insecticides.
Career Highlights: In her professional journey, Toshiko Honda has established herself as a vital contributor to Sumitomo Chemical Company, Limited. Her work exemplifies a commitment to advancing the field of chemistry and enhancing industrial processes.
Collaborations: Throughout her career, Toshiko has collaborated with fellow esteemed researchers, including Nobushige Itaya and Akio Higo. Their collective efforts have pushed the boundaries of chemical research, leading to groundbreaking patents that benefit various industries.
Conclusion: Toshiko Honda's innovative work in the preparation of cis-chrysanthemic acid demonstrates her profound impact on the chemical industry. By developing efficient processes that convert raw materials into valuable compounds, she continues to pave the way for advancements in insecticide production and chemical manufacturing. Her achievements serve as an inspiration to future inventors in the field.