Location History:
- Tokyo, JA (1977)
- Tokyo, JP (1985)
- Chiba, JP (1995)
- Minato-ku, JP (2014 - 2015)
Company Filing History:
Years Active: 1977-2015
Title: The Innovative Contributions of Hidejiro Yokoo
Introduction
Hidejiro Yokoo, located in Minato-ku, Japan, is a prolific inventor recognized for his significant contributions to chemical engineering through his innovative processes. With a total of five patents to his name, Yokoo has made strides in the efficient production of important chemical compounds.
Latest Patents
Among Yokoo's latest patents are two notable processes:
1. **Process for Producing Carbonyl Sulfide** - This patent showcases an efficient method for producing carbonyl sulfide by reacting sulfur with carbon monoxide in a liquid phase. The process involves introducing carbon monoxide continuously into a reactor where sulfur is dissolved or suspended in an organic solvent. By maintaining specific pressure (0.2-3.0 MPa) and temperature (40-120°C), carbonyl sulfide is produced, which is then condensed and withdrawn continuously from the reactor.
2. **Process for Producing Carbonyl Difluoride** - In this invention, Yokoo developed a simple and cost-effective process for creating carbonyl difluoride, an essential compound in semiconductor fabrication. The process entails the gas-phase reaction of phosgene and hydrogen fluoride in the presence of a fluorination catalyst, followed by the separation of carbonyl difluoride using an azeotropic distillation method.
Career Highlights
Throughout his career, Yokoo has worked with esteemed companies such as Showa Denko K.K. and Showa Denko Kabushiki Kaisha. His work in these organizations has allowed him to refine his expertise and contribute to advancements in chemical processes.
Collaborations
Yokoo has collaborated with notable colleagues, including Hiromoto Ohno and Kohei Morikawa. These partnerships have fostered an environment of shared knowledge and innovation, further enhancing the quality of his inventions.
Conclusion
Hidejiro Yokoo stands out as a leading inventor, demonstrating a remarkable capability to innovate within the chemical industry. His patented processes not only contribute to advancements in chemical manufacturing but also highlight the importance of collaborative efforts in scientific research and development. As the field continues to evolve, Yokoo's contributions will undoubtedly influence future innovations in chemical processing.