Location History:
- Niigata, JP (1996)
- Niigata-ken, JP (1999)
Company Filing History:
Years Active: 1996-1999
Title: Kazushi Hirokawa: Innovator in Chemical Processes
Introduction
Kazushi Hirokawa is a notable inventor based in Niigata, Japan. He has made significant contributions to the field of chemistry, particularly in the development of processes for synthesizing various chemical compounds. With a total of 2 patents to his name, Hirokawa's work has implications in both industrial and research settings.
Latest Patents
Hirokawa's latest patents include a process for the preparation of .alpha.-bromo, .omega.-chloroalkanes. This process allows for the easy preparation of high-purity .alpha.-bromo, .omega.-chloroalkanes represented by the formula: Br(CH.sub.2).sub.n Cl, where n is an integer from 4 to 12. The method involves reacting an .alpha., .omega.-dichloroalkane with an .alpha., .omega.-dibromoalkane in an organic solvent. Preferred solvents include aprotic nitrogen-containing or sulfur-containing organic solvents with a dielectric constant of 20 or larger, such as N,N-dimethylformamide, N,N-dimethylacetamide, or N,N-dimethylimidazolidinone. Another significant patent is for the preparation of phosphonium salts, which are useful in the synthesis of olefin compounds via the Wittig reaction. This process involves reacting a phosphine compound with chlorides.
Career Highlights
Kazushi Hirokawa is currently employed at Shin-Etsu Chemical Co., Ltd., where he continues to innovate and contribute to the field of chemical engineering. His work has been instrumental in advancing methods that enhance the efficiency and purity of chemical processes.
Collaborations
Hirokawa has collaborated with esteemed colleagues such as Takehiko Fukumoto and Hiroshi Suzuki. These partnerships have fostered a collaborative environment that encourages the exchange of ideas and expertise in chemical research.
Conclusion
Kazushi Hirokawa's contributions to chemical processes exemplify the importance of innovation in the field. His patents not only advance scientific knowledge but also have practical applications in various industries.