Richard F Jansen

Title: Richard F Jansen: Innovator in Aryl Sulfonamide Preparation

Introduction

Richard F Jansen is a notable inventor based in St. Louis, MO (US). He has made significant contributions to the field of chemistry, particularly in the preparation of arylsulfonamides. With a total of 7 patents to his name, Jansen's work has advanced processes that are crucial in various chemical applications.

Latest Patents

Jansen's latest patents include innovative methods for the preparation of arylsulfonamides. One of his notable inventions is a process improvement that avoids the multistep arylsulfonyl chloride refining operation currently in use. This method simultaneously neutralizes and removes all acidic by-products of chlorosulfonation while forming arylsulfonamides. The process involves reacting an aryl hydrocarbon with chlorosulfonic acid, combining the crude reaction product with ammonia in an aqueous medium, and maintaining specific temperature and pH conditions to yield the desired amidation reaction product. Another patent focuses on the preparation of N-substituted arylsulfonamides, which also follows a similar reaction pathway but incorporates aliphatic amines and hydroxides.

Career Highlights

Throughout his career, Richard F Jansen has worked with prominent companies such as Monsanto Company and Akzo America Inc. His experience in these organizations has allowed him to refine his skills and contribute to significant advancements in chemical processes.

Collaborations

Jansen has collaborated with various professionals in his field, including Gail H Birum, enhancing the scope and impact of his work.

Conclusion

Richard F Jansen's innovative approaches to the preparation of arylsulfonamides have made a lasting impact in the field of chemistry. His patents reflect a commitment to improving chemical processes and advancing the industry.