Edward L Derrenbacker

Title: The Innovative Contributions of Edward L Derrenbacker

Introduction

Edward L Derrenbacker is a notable inventor based in St. Louis, MO. He has made significant contributions to the field of chemical engineering, particularly in the purification and preparation of p-aminophenol. With a total of 2 patents to his name, Derrenbacker has demonstrated a commitment to advancing chemical processes.

Latest Patents

Derrenbacker's latest patents include a process for the purification of p-aminophenol and a process for the selective preparation of p-aminophenol from nitrobenzene. The purification process involves contacting an aqueous feed solution, prepared by catalytic reduction of nitrobenzene, with a base to adjust the pH and extracting the solution with a mixture of aniline and toluene. This method allows for the selective dissolution of 4,4'-diaminodiphenyl ether, resulting in an aqueous phase that contains primarily p-aminophenol. The process also includes back-extraction techniques to enhance the overall yield of p-aminophenol. The second patent focuses on an improved method for preparing p-aminophenol through catalytic hydrogenation in an aqueous acidic medium, which increases the reaction's rate and selectivity.

Career Highlights

Edward L Derrenbacker is currently associated with Mallinckrodt, Inc., where he continues to innovate in the field of chemical processes. His work has contributed to the development of more efficient methods for producing important chemical compounds.

Collaborations

Derrenbacker has collaborated with notable coworkers such as William R Clingan and Thomas J Dunn, further enhancing the impact of his work in the industry.

Conclusion

Edward L Derrenbacker's contributions to the field of chemical engineering, particularly through his patents, highlight his innovative spirit and dedication to improving chemical processes. His work continues to influence the industry and pave the way for future advancements.