Company Filing History:
4 out of 776 
1 out of 137 
Years Active: 1987-1990
Title: Atsushi Sasakawa: Innovator in Chemical Processes
Introduction
Atsushi Sasakawa is a notable inventor based in Iwaki, Japan. He has made significant contributions to the field of chemical processes, holding a total of 5 patents. His work primarily focuses on the production of various chemical compounds through innovative methods.
Latest Patents
One of his latest patents is the "Preparation process of biphenyl-4,4'-dicarboxylic acid." This process involves isolating a mixture of diisopropylbiphenyls from a reaction mixture obtained by reacting biphenyl with propylene. The method includes crystallizing 4,4'-diisopropylbiphenyl from the mixture and oxidizing it with molecular oxygen in the presence of a cobalt and/or manganese catalyst. The solvent used contains at least 50 wt. % of an aliphatic monocarboxylic acid with up to three carbon atoms.
Another significant patent is the "Process for producing 2,6-naphthalenedicarboxylic acid." This invention discloses a method for oxidizing 2,6-diisopropylnaphthalene or its partially oxidized intermediate with molecular oxygen. The process utilizes a solvent containing at least 50% by weight of an aliphatic monocarboxylic acid and a catalyst composed of cobalt and/or manganese, along with bromine and a specific inorganic acid salt. This method allows for the production of 2,6-naphthalenedicarboxylic acid with high bulk density, yield, and purity.
Career Highlights
Atsushi Sasakawa has worked with prominent companies such as Kureha Kagaku Kogyo Kabushiki Kaisha and Kureha Kagaku Kogyo K.K. His experience in these organizations has contributed to his expertise in chemical processes and innovation.
Collaborations
Throughout his career, Atsushi has collaborated with notable coworkers, including Shoichiro Hayashi and Toshiharu Matsuda. These collaborations have likely enriched his work and led to further advancements in his field.
Conclusion
Atsushi Sasakawa is a distinguished inventor whose innovative approaches to chemical processes have resulted in multiple patents. His contributions continue to impact the industry positively.