Company Filing History:
2 out of 1,888 
1 out of 1,100 
1 out of 3 Years Active: 1980-1987
Title: Innovations of Toshio Ohzawa
Introduction
Toshio Ohzawa is a notable inventor based in Kobe, Japan. He has made significant contributions to the field of coal treatment and liquefaction. With a total of 3 patents to his name, his work has advanced the efficiency of coal processing technologies.
Latest Patents
Ohzawa's latest patents include a method of treating brown coal for liquefaction. This innovative process involves creating a starting slurry composed of raw brown coal and a solvent, which is then heated and pressurized. The method includes gas-liquid separation and dehydration, followed by hydrogenation and liquefaction. A CO₂-containing gas is introduced during the preheating and dehydration steps, converting carbonate-forming metal components in the brown coal into carbonates. This approach enhances hydrogenation and liquefaction efficiency, enabling stable long-term continuous operation.
Another significant patent is the process for reforming coal. This improvement involves subjecting a mixed slurry of hydrocarbon solvent and coal fines to hydrogenation under high temperature and pressure. The process includes gas-liquid separation and distillation to produce solvent-refined coal. Key improvements focus on maintaining specific reaction temperatures and pressures, as well as controlling the residence time distribution of reactants to optimize the reaction efficiency.
Career Highlights
Throughout his career, Toshio Ohzawa has worked with prominent companies such as Kobe Steel, Ltd. and Kabushiki Kaisha Kobe Seiko Sho. His experience in these organizations has contributed to his expertise in coal processing technologies.
Collaborations
Ohzawa has collaborated with notable coworkers, including Yukio Nakako and Shizuo Yokota. Their combined efforts have furthered advancements in the field of coal treatment.
Conclusion
Toshio Ohzawa's innovative patents and career achievements highlight his significant impact on coal processing technologies. His work continues to influence the industry and improve the efficiency of coal liquefaction methods.