Haruhiko Ishikawa

Title: Haruhiko Ishikawa: Innovator in Polyacrylamide Production

Introduction

Haruhiko Ishikawa is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of chemical engineering, particularly in the production of polyacrylamide. His innovative approach has led to advancements in water treatment and paper manufacturing processes.

Latest Patents

Ishikawa holds a patent for a process for producing partially hydrolyzed polyacrylamide. This process involves polymerizing an aqueous solution of an acrylamide monomer in the presence of an alkali metal hydroxide, such as sodium hydroxide, and boric acid. The method allows for a high molecular weight and high water solubility, making it suitable for use as a flocculant in water treatment and as a size for paper manufacture. Additionally, the process includes a simultaneous partial hydrolysis of the polymer formed during polymerization. An additional embodiment of the patent describes maturing the polyacrylamide by continuing to heat the polymer solution to increase the hydrolysis percentage.

Career Highlights

Ishikawa is associated with Nitto Chemical Industry Co., Ltd., where he has been able to apply his expertise in chemical processes. His work has contributed to the development of effective solutions for industrial applications, particularly in enhancing the efficiency of water treatment methods.

Collaborations

Throughout his career, Ishikawa has collaborated with notable colleagues, including Masao Hasegawa and Akihisa Furuno. These collaborations have fostered a productive environment for innovation and have led to further advancements in their respective fields.

Conclusion

Haruhiko Ishikawa's contributions to the production of partially hydrolyzed polyacrylamide highlight his role as an innovator in chemical engineering. His patent reflects a significant advancement in processes that benefit both water treatment and paper manufacturing industries.