Katsutoshi Numano

Title: Innovations of Katsutoshi Numano in Pigment Production

Introduction

Katsutoshi Numano is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of pigment production, holding 2 patents that focus on the development of 4,4'-diamino-1,1'-dianthraquinonyl compounds. His work is essential for various applications, including paints and printing inks.

Latest Patents

Numano's latest patents include a process for producing 4,4'-diamino-1,1'-dianthraquinonyl pigments. This process involves conditioning the pigments by heating an aqueous suspension of the compound in the presence or absence of a mineral acid or alkali. The resulting pigments are known for their excellent properties and are widely used in the coloring of plastics and other materials. Another patent focuses on the purification of crude 4,4'-diamino-1,1'-dianthraquinonyl-3,3'-disulfonic acids. This method utilizes salting-out techniques to achieve high yields of usable products for pigment production.

Career Highlights

Katsutoshi Numano is associated with Sumitomo Chemical Company, Limited, where he has been able to apply his innovative ideas in a practical setting. His work has led to advancements in the production processes of high-quality pigments, contributing to the company's reputation in the chemical industry.

Collaborations

Throughout his career, Numano has collaborated with talented coworkers, including Keisuke Ito and Hiroki Inoue. These partnerships have fostered a creative environment that encourages innovation and the development of new technologies.

Conclusion

Katsutoshi Numano's contributions to pigment production through his patents demonstrate his expertise and commitment to innovation in the field. His work continues to impact various industries, showcasing the importance of research and development in creating high-quality materials.