This inventor holds 3 USPTO granted patents, plus 1 CIPO patent. Top assignees: Chiyoda Corporation, Tonen Corporation. Active years: 1999-2009.
Location History:
- Kamakura, JP (1999 - 2000)
- Yokohama, JP (2009)
Company Filing History:
Years Active: 1999-2009
Title: The Innovative Contributions of Chieko Nagasawa
Introduction
Chieko Nagasawa, a talented inventor based in Kamakura, Japan, has made significant strides in the field of chemical engineering. With a focus on improving manufacturing processes, she holds three patents that reflect her innovative approach to chemical reactions and catalyst utilization.
Latest Patents
Her most recent patents include:
1. **Method of Manufacturing Acetic Acid** - This patent outlines a process for producing acetic acid through the carbonylation of methanol with carbon monoxide using a heterogeneous catalytic reaction in a bubble column reactor. Critical parameters are defined, including a solid catalyst concentration of no less than 100 kg/m3 and a controlled range for the partial pressure of carbon monoxide between 1.0 and 2.5 MPa. The procedure also emphasizes an optimal exhaustion ratio of carbon monoxide maintained between 3% and 15% of its theoretical volume, with a liquid superficial velocity ranging from 0.2 to 1.0 m/sec.
2. **Method of Contacting Catalyst Particles with Gas and Liquid** - This invention focuses on the interaction of catalyst particles, liquid, and gas in a vertically extending cylindrical vessel. The design ensures that the gas and liquid are continuously fed from the bottom, creating an upwardly flowing mixture that allows for effective separation by gravity into different phases. This innovative method enhances the efficiency of catalyst recycling.
Career Highlights
Chieko has built her professional career within esteemed companies such as Chiyoda Corporation and Tonen Corporation. Her experience in these organizations has contributed to her extensive knowledge in chemical processes and patent development.
Collaborations
Throughout her career, Chieko has had the opportunity to collaborate with notable colleagues, including Takeshi Minami and Fumihiko Uemura. These partnerships have likely fostered a creative environment that supports innovation and the advancement of chemical engineering technologies.
Conclusion
Chieko Nagasawa is a noteworthy inventor whose contributions to the field of chemical engineering are evident in her patented methods related to acetic acid production and catalyst interactions. Her collaborative spirit, combined with her work in leading corporations, positions her as a significant figure in the realm of innovations in chemistry.