Kiyoshi Shirasuna

Title: Kiyoshi Shirasuna: Innovator in Hydrophobic Silica Production

Introduction

Kiyoshi Shirasuna is a notable inventor based in Annaka, Japan. He has made significant contributions to the field of materials science, particularly in the production of hydrophobic silica fine powder. With a total of 3 patents to his name, Shirasuna's work has implications for various industrial applications.

Latest Patents

Shirasuna's latest patents focus on innovative methods for producing hydrophobic silica fine powder. One of his patents describes a process where hydrophobic silica fine powder is created by pyrolyzing a silane compound to form silica fine powder. This powder is then hydrophobized using an organohalosilane in a fluidization vessel. The method allows for the collection of hydrophobized silica fine powder using a cyclone and bag filter, which operate at temperatures between 100-500°C. This process not only increases the yield of the product but also reduces the burden on waste gas treatment.

Another patent outlines a similar method, where a portion of the silica fine powder is bypassed to a waste gas line from the fluidization vessel. This collected powder is then fed back into the fluidization vessel for hydrophobization, which helps in reducing the amount of unreacted organohalosilane in the waste gases. This feedback mechanism enhances the reaction efficiency of the organohalosilane, making the process more effective.

Career Highlights

Kiyoshi Shirasuna is currently employed at Shin-Etsu Chemical Co., Ltd., a leading company in the chemical industry. His work at Shin-Etsu has allowed him to focus on advancing the production techniques of silica materials, contributing to the company's reputation for innovation.

Collaborations

Shirasuna has collaborated with notable colleagues such as Hidekazu Uehara and Susumu Ueno. These collaborations have fostered a productive environment for research and development, leading to advancements in their respective fields.

Conclusion

Kiyoshi Shirasuna's contributions to the production of hydrophobic silica fine powder demonstrate his innovative spirit and commitment to advancing materials science. His patents reflect a deep understanding of chemical processes and their industrial applications.