Company Filing History:
2 out of 16 
2 out of 2 Years Active: 2000
Title: Yoshitaka Miyawaki: Innovator in Chemical Processes
Introduction
Yoshitaka Miyawaki is a notable inventor based in Takamatsu, Japan. He has made significant contributions to the field of chemistry, particularly in the preparation of specialized chemical compounds. With a total of two patents to his name, his work has implications in various industrial applications.
Latest Patents
Miyawaki's latest patents include a process for the preparation of 5,5'-bi-1H-tetrazole salt. This innovative method involves the dropwise addition of aqueous hydrogen peroxide, combined with a weakly acidic substance, to a solution containing hydrogen cyanide or its sodium and potassium salts, along with sodium azide and copper sulfate. The process is designed to maintain a pH range of 5 to 6 while heating the reaction solution to facilitate oxidation and cyclization. The resulting ammonium salt is recovered as sparingly soluble crystals, achieving high yield and purity through a streamlined one-pot reaction. Another patent details a method for preparing 5,5'-bi-1H-tetrazole diammonium salt using dicyan, sodium azide, ammonium chloride, and water. This method is particularly advantageous for industrial applications, as it allows for the simple isolation of the desired product with a yield of not less than 90%. The 5,5'-bi-1H-tetrazole diammonium salt serves as a low-toxicity gas-generating agent for airbags, making it both safe and easy to handle.
Career Highlights
Throughout his career, Yoshitaka Miyawaki has worked with prominent companies such as Japan Hydrazine Co., Ltd. and Masuda Chemical Industry Co., Ltd. His experience in these organizations has contributed to his expertise in chemical processes and innovation.
Collaborations
Miyawaki has collaborated with notable individuals in his field, including Shunji Hyoda and Masaharu Kita. These partnerships have likely enhanced his research and development efforts, leading to successful patent applications.
Conclusion
Yoshitaka Miyawaki's contributions to the field of chemistry, particularly through his patents on 5,5'-bi-1H-tetrazole salts, highlight his innovative spirit and dedication to advancing chemical processes. His work not only demonstrates technical expertise but also addresses practical applications in safety technology.