Company Filing History:
Years Active: 1983-1984
Title: Koji Nishihara: Innovator in Chemical Processes
Introduction
Koji Nishihara is a notable inventor based in Wakayama, Japan. He has made significant contributions to the field of chemical processes, holding a total of 2 patents. His work focuses on innovative methods for producing various chemical compounds.
Latest Patents
Nishihara's latest patents include a process for producing 4',4-dihydroxydiphenyl. This process involves subjecting 1 mol of 4,4'-diphenyldisulfonic acid and/or potassium 4,4'-diphenyldisulfonate to alkali fusion with 4 to 10 mol of potassium hydroxide and 0.1 to 2 mol of potassium sulfate. Alternatively, it may involve controlling the potassium hydroxide concentration in the reaction mixture to 20 to 25% while separating the dipotassium salt of 4,4'-dihydroxydiphenyl. Another patent details a process for producing 4,4'-diphenyldisulfonic acid and its monopotassium. This involves adding a sulfonating agent to molten diphenyl at a temperature between 130°C and 145°C, cooling the reaction mixture to 115°C to 127°C, and allowing the disulfonation reaction to complete.
Career Highlights
Koji Nishihara is associated with Sugai Chemical Industry Co., Ltd., where he applies his expertise in chemical processes. His innovative approaches have contributed to advancements in the production of important chemical compounds.
Collaborations
Nishihara has collaborated with notable coworkers, including Takeshi Hashimoto and Terumasa Akashi. Their combined efforts have furthered the development of innovative chemical processes.
Conclusion
Koji Nishihara is a distinguished inventor whose work in chemical processes has led to valuable patents and advancements in the field. His contributions continue to impact the industry positively.