Norinobu Wada

Title: Norinobu Wada: Innovator in Vinyl Chloride Polymerization

Introduction

Norinobu Wada is a notable inventor based in Ibaraki, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the area of vinyl chloride polymerization. With a total of 2 patents, Wada's work focuses on improving the efficiency and safety of polymer production processes.

Latest Patents

Wada's latest patents include innovative methods for removing unreacted monomers from aqueous dispersions. One of his patents describes a method for removing unreacted residual monomer from an aqueous slurry of a vinyl chloride polymerizate. This method involves continuously feeding the monomer-containing aqueous slurry to a plate column, where it runs down through a cyclone-type mist separator and multiple perforated plates. The slurry comes into counter-current contact with steam, which is blown into the column from the bottom, allowing the monomer to dissipate as vapors. The steam carrying the dissipated monomer vapors is then subjected to mist separation and heat exchange, ultimately recovering the monomer.

Another patent outlines a method for discharging gaseous vinyl chloride monomer from a polymerization reactor. This method involves blowing steam into the reactor from the top, pushing the gaseous monomer downward and out from the bottom. This innovative approach allows the reactor to be opened to the ambient atmosphere without emitting unreacted monomer, addressing both worker health and environmental pollution concerns.

Career Highlights

Norinobu Wada is currently employed at Shin-Etsu Chemical Co., Ltd., where he continues to develop and refine his innovative methods in polymer chemistry. His work has had a significant impact on the industry, enhancing both safety and efficiency in the production of vinyl chloride polymers.

Collaborations

Wada has collaborated with notable colleagues such as Yoshitaka Okuno and Yoshihiro Shirota. Their combined expertise has contributed to the advancement of technologies in the field of polymerization.

Conclusion

Norinobu Wada's contributions to the field of vinyl chloride polymerization demonstrate his commitment to innovation and safety in chemical processes. His patents reflect a deep understanding of the challenges in polymer production and offer practical solutions that benefit both industry and the environment.