Company Filing History:
1 out of 2 
1 out of 2,276 
1 out of 832,912 Years Active: 2003-2005
Title: Daigo Shirota: Innovator in Polyarylene Sulfide Treatment
Introduction
Daigo Shirota is a notable inventor based in Chiba, Japan. He has made significant contributions to the field of chemical engineering, particularly in the treatment of by-products from polyarylene sulfide production. With a total of 2 patents, his work focuses on enhancing the efficiency and environmental sustainability of chemical processes.
Latest Patents
Shirota's latest patents include a "Method of treating by-product salt yielded with polyarylene sulfide." This patent discloses a process for treating a by-product salt formed during the production of polyarylene sulfide. The method involves subjecting solid matter containing an aprotic organic solvent and the by-product salt to a drying treatment, followed by a firing treatment at temperatures ranging from 500 to 1000°C. This process enhances the solubility of the by-product salt, primarily sodium chloride, in water, resulting in wastewater with reduced suspended solids (SS) and chemical oxygen demand (COD).
Another significant patent is the "Process for treating by-product of polyarylene sulfide." This invention describes a method for treating a solid mixture containing an aprotic organic solvent and the by-product salt formed during the polymerization condensation reaction of an alkali metal sulfide and a dihalogenated aromatic compound. The process allows for the efficient recovery of the aprotic organic solvent, thereby reducing production costs for polyarylene sulfide.
Career Highlights
Throughout his career, Daigo Shirota has worked with various organizations, including the Petroleum Energy Center, a Juridical Incorporated Foundation. His experience in these institutions has contributed to his expertise in chemical processes and innovations in the field.
Collaborations
Due to space constraints, the details of collaborations will not be included.
Conclusion
Daigo Shirota's innovative approaches to treating by-products in polyarylene sulfide production demonstrate his commitment to enhancing chemical processes. His patents reflect a significant advancement in both efficiency and environmental sustainability in the industry.