James H Dube

Title: **James H. Dube: Innovator in Chemical Purification**

Introduction

James H. Dube, an inventor based in Mobile, Alabama, is known for his contributions to the field of chemical engineering through his innovative approach to the purification of dithiophosphoric acids. With a sole patent to his name, Dube's work stands out for its relevance in chemical processes, particularly in improving the purity of important compounds.

Latest Patents

Dube's patent, titled "Process for the purification of O,O-di(lower)alkyldithiophosphoric acids," employs a sophisticated liquid-liquid extraction method. This method is designed to recover O,O-di(lower)alkyldithiophosphoric acid from a crude mixture, enhancing its purity significantly. The process involves the intimate contact of the mixture with an acidic aqueous solution to create two liquid phases, resulting in a higher concentration of thiophosphoric acid in the aqueous phase. Subsequent steps include separating the phases, treating the aqueous phase with a volatile, organic solvent, and finally vaporizing the organic solvent to yield high-purity dithiophosphoric acid. This innovative technique showcases Dube's expertise in chemical engineering and his commitment to advancing purification methods.

Career Highlights

Throughout his career, James H. Dube has worked at Ciba-Geigy Corporation, a company recognized for its innovations in chemical and pharmaceutical products. His role at Ciba-Geigy allowed him to apply his knowledge of chemical processes, leading to significant advancements in the field. Dube's dedication to his work has established him as an inventor with valuable insights into chemical purification techniques.

Collaborations

In his professional journey, James H. Dube has collaborated with Ralph E. Miller, a fellow coworker whose contributions have furthered the understanding and development of chemical processes. Their teamwork reflects the importance of collaboration in achieving milestones in the realm of invention and innovation.

Conclusion

James H. Dube's contributions to the field of chemical purification emphasize the impact of individual inventors on broader technological advancements. His patented process for purifying O,O-di(lower)alkyldithiophosphoric acids not only demonstrates his inventiveness but also highlights the importance of refining chemical processes. With a career rooted in innovation, Dube continues to be a noteworthy figure in the landscape of chemical engineering.