Company Filing History:
Years Active: 1988
Title: Satoshi Kajitani: Innovator in Anthraquinone Compounds
Introduction
Satoshi Kajitani is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of chemistry, particularly in the production of anthraquinone compounds. With a total of 2 patents, his work has implications for various applications, including dyes and thermal transfer recording.
Latest Patents
Kajitani's latest patents include a method for producing anthraquinone compounds. This method involves preparing anthraquinone compounds of the formula, wherein R is hydrogen, alkyl, or cycloalkyl. These compounds serve as intermediates for disperse dyes and sublimable dyes. The process allows the compound to react with a cyanogenating agent in an aqueous medium, utilizing polyalkylene glycols. Another significant patent is for the process of preparing 1,4-diaminoanthraquinone-2,3-disubstituted compounds. This process economically produces 1,4-diaminoanthraquinone-2,3-disulfonic acid or its salts, as well as 1,4-diaminoanthraquinone-2,3-dinitrile. The method involves reacting 1,4-diamino-2,3-dihalogenoanthraquinone with alkalimetal sulfite in an aqueous solution, while recovering quaternary ammonium or phosphonium compounds for reuse.
Career Highlights
Kajitani is currently associated with Sumitomo Chemical Company, Limited, where he continues to innovate in the field of chemical production. His work has been instrumental in advancing the understanding and application of anthraquinone compounds.
Collaborations
One of his notable collaborators is Makoto Hattori, with whom he has worked on various projects related to his patents.
Conclusion
Satoshi Kajitani's contributions to the field of anthraquinone compounds highlight his innovative spirit and dedication to advancing chemical processes. His patents reflect a commitment to improving the efficiency and effectiveness of dye production methods.