Company Filing History:
1 out of 44 
1 out of 13 Years Active: 1982
Title: Shigemi Nagayoshi: Innovator in Water-Containing Coal Treatment
Introduction
Shigemi Nagayoshi is a notable inventor based in Hikari, Japan. She has made significant contributions to the field of coal treatment, particularly focusing on the processing of water-containing coal. Her innovative approach has led to the development of a patented method that enhances the efficiency of coal utilization.
Latest Patents
Nagayoshi holds a patent for the "Treatment of water-containing coal." This process involves mixing water-containing coal with a hydrocarbon oil that has a specific gravity higher than that of water. The mixture is heated at temperatures ranging from 100°C to 350°C and under pressure not lower than the saturated vapor pressure of water at that temperature. The method allows the heated mixture to settle, resulting in an upper layer of separated water and a lower layer of dehydrated coal mixed with hydrocarbon oil. This innovative treatment process is designed to improve the handling and processing of coal.
Career Highlights
Throughout her career, Shigemi Nagayoshi has worked with prominent companies in the industry. She has been associated with Mitsui Mining Co., Ltd. and Mitsui Coke Co., Ltd., where she has contributed her expertise in coal treatment technologies. Her work has been instrumental in advancing methods for coal processing and utilization.
Collaborations
Nagayoshi has collaborated with notable colleagues, including Isao Kubo and Futao Sakata. These partnerships have fostered innovation and development in the field of coal treatment, enhancing the effectiveness of their collective research efforts.
Conclusion
Shigemi Nagayoshi's contributions to the treatment of water-containing coal exemplify her innovative spirit and dedication to improving coal processing methods. Her patented process not only showcases her expertise but also highlights the importance of advancements in energy resource management.