Yoshiro Ashina

Title: Yoshiro Ashina: Innovator in Zeolite Catalysts

Introduction:

Yoshiro Ashina, a renowned inventor and researcher in the field of zeolite catalysts, hails from Zushi, Japan. With an impressive portfolio of patents and a prominent role in Nitto Kagaku Kogyo Kabushiki Kaisha, he has made significant contributions to the catalytic production of methylamines and the selective production of dimethylamine. This article explores Ashina's latest patents, career highlights, and notable collaborations.

Latest Patents:

Yoshiro Ashina has obtained a total of four patents throughout his career, highlighting his expertise in the field of zeolite catalysts. His recent patents demonstrate his innovative approach to maintaining catalyst activity and achieving selective production.

1. Method for maintaining the activity of zeolite catalysts:

In this patent, Ashina presents a method for maintaining the activity of a zeolite catalyst used in the catalytic production of methylamines from methanol and ammonia. By controlling the amount of aldehyde compounds, specifically formaldehyde, flowing into the catalyst layer, Ashina recommends a maximum impurity level of 0.15 g/hr.kg-cat. This technique ensures the optimal functioning of the zeolite catalyst, improving its overall efficiency.

2. Process for producing dimethylamine in preference to mono- and trimethylamines:

Ashina's second patent focuses on a specific process for the selective production of dimethylamine compared to mono- and trimethylamines. Through a catalytic vapor phase reaction between ammonia and methanol, Ashina proposes the use of mordenite, clinoptilolite, or erionite zeolites. The crucial improvement lies in the steam contact with the zeolite at temperatures ranging from 250°C to 700°C, enhancing the desired dimethylamine yield.

Career Highlights:

Yoshiro Ashina's career showcases his dedication to advancing the field of zeolite catalysts. His accomplishments include:

1. Prominent role in Nitto Kagaku Kogyo Kabushiki Kaisha:

Ashina currently works at Nitto Kagaku Kogyo Kabushiki Kaisha, a leading chemical company based in Japan. His contributions have strengthened the company's research and development efforts in catalysis technology, solidifying their position as pioneers in the industry.

Collaborations:

Yoshiro Ashina's work often involves collaboration with other experts in the field. Notable colleagues include:

1. Takeyuki Fujita:

Fujita is a respected researcher and co-worker of Ashina. Their collaborative efforts have contributed to various breakthroughs in zeolite catalysts, leading to advancements in catalytic production processes.

2. Michio Fukatsu:

Fukatsu's expertise in catalytic reactions complements Ashina's research interests. Together, they have published influential studies on zeolite catalysts, paving the way for further developments in the field.

Conclusion:

Yoshiro Ashina's contributions to the field of zeolite catalysts have significantly impacted the catalytic production of methylamines and selective production of dimethylamine. Through his patents and collaborations, Ashina has demonstrated his commitment to innovation and improving the efficiency of catalytic processes. His work continues to inspire researchers and scientists in the quest for advancements in zeolite catalyst technology.