Location History:
- Tokyo, JP (1993 - 1998)
- Nagasaki, JP (2001 - 2002)
Company Filing History:
5 out of 1,326 
2 out of 4,629 
Years Active: 1993-2002
Title: Shigeyasu Ishigami: Innovator in Calcium Sulfide Oxidation
Introduction
Shigeyasu Ishigami is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of chemical engineering, particularly in the oxidation of calcium sulfide. With a total of 7 patents to his name, Ishigami's work has advanced the understanding and application of oxidation processes.
Latest Patents
One of Ishigami's latest patents is the "Calcium sulfide oxidation method and apparatus." This innovative method allows for the complete oxidation of calcium sulfide (CaS) particles into calcium sulfate (CaSO) throughout the interior of the particle. The oxidation apparatus is designed with a partition that creates a first fluidized bed on the inner side and a second fluidized bed on the outer side, along with a space portion above. A heat exchanger with a baffle plate is positioned on the inner side of the partition, while an in-bed heat exchanger is located on the outer side. The process involves supplying a mixture of nitrogen, oxygen, and steam, along with coal and coal char, into the respective fluidized beds. The oxidized particles are then discharged as ash, showcasing the efficiency of this method.
Career Highlights
Throughout his career, Shigeyasu Ishigami has worked with notable companies such as Mitsubishi Jukogyo Kabushiki Kaisha and Mitsubishi Heavy Industries Limited. His experience in these organizations has contributed to his expertise in chemical processes and engineering.
Collaborations
Ishigami has collaborated with esteemed colleagues, including Yuichi Fujioka and Yoshihiko Tsuchiyama. These partnerships have fostered innovation and the sharing of knowledge in their respective fields.
Conclusion
Shigeyasu Ishigami's contributions to the field of chemical engineering, particularly through his patents on calcium sulfide oxidation, highlight his role as a significant inventor. His work continues to influence advancements in oxidation processes and chemical applications.