Hisaya Miki

Title: Hisaya Miki: Patent Contributions in Chemical Processes and Recording Materials.

Introduction

Hisaya Miki is an inventor associated with Iwakuni, Japan, and Mitsui Petrochemical Industries, Ltd. His patent portfolio includes 9 patents, covering technologies such as color-forming recording materials and chemical processes for producing useful naphthalene compounds.

Latest Patents

One of Miki’s listed patents concerns a color-forming recording material. The available description identifies the material as a subject of the invention but does not provide further details about its composition or operation.

Another listed patent describes a process for oxidizing 2,6-diisopropylnaphthalene to produce 2,6-dihydroxynaphthalene. The process uses a specified proportion of a basic compound to promote hydroxylation or hydroperoxylation at high conversion, followed by acid cleavage in the presence of hydrogen peroxide. The description notes that purification, dehydration, or the addition of acetone before acid cleavage can increase the product yield. The resulting 2,6-dihydroxynaphthalene can also be reacted with acetic anhydride to produce 2,6-diacetoxynaphthalene.

Career Highlights

Miki’s listed inventions span recording materials and chemical manufacturing processes. The oxidation process focuses on improving conversion and yield while providing a route to compounds used as chemical intermediates.

Collaborations

Miki’s listed coworkers include Masatoshi Nitabaru and Yutaka Haneda. The supplied information does not specify their roles or the details of their collaboration.

Conclusion

Hisaya Miki’s patent record reflects work in both recording-material technology and chemical process development, including a described method for producing 2,6-dihydroxynaphthalene.