Leonid A Oshin

Title: Leonid A. Oshin: Chemical Process Inventions

Introduction

Leonid A. Oshin is an inventor associated with Moscow, Russia. His patent work focuses on chemical manufacturing processes, including methods for producing allyl chloride and vinyl chloride. He is credited with 2 patents.

Latest Patents

Process for Preparing Allyl Chloride. This invention describes chlorinating propylene with hydrogen chloride in an upward-flowing stream containing a manganese dioxide catalyst supported on lean manganese ore. The process specifies operating temperatures of 300°C to 500°C, controlled catalyst concentration and contact time, and a defined ratio of propylene to hydrogen chloride. After chlorination, the catalyst is separated, regenerated with oxygen at 500°C to 520°C, and returned to the process. The disclosed method reports an allyl chloride yield of up to 81.5% by volume, propylene conversion of up to 98%, and selectivity of 80% to 85%. It is also designed to enable wasteless production.

Method of Preparing Vinyl Chloride. This invention produces vinyl chloride through gas-phase chlorination of a mixture containing ethane and ethylene. It determines the chlorine feed according to the quantities of those gases and introduces chlorine at multiple points in the reaction zone. The method is reported to increase vinyl chloride yield to as much as 70% by weight while reducing process energy consumption by a factor of 1.5 compared with prior methods.

Career Highlights

Oshin’s listed inventions address industrial chemical production, with an emphasis on reaction conditions, catalyst handling, product yield, and energy efficiency. The supplied information does not identify a company associated with his work.

Collaborations

The supplied information names Vagab S. Aliev and Erik V. Sonin as Oshin’s coworkers. Their specific roles in the listed inventions are not provided.

Conclusion

Leonid A. Oshin’s two patents describe approaches to producing allyl chloride and vinyl chloride, aiming to improve yields and make chemical manufacturing more efficient.