Jean-Francois Combes

Title: The Innovative Contributions of Jean-Francois Combes

Introduction

Jean-Francois Combes is a notable inventor based in Lyons, France. He has made significant contributions to the field of water purification and material science. With a total of 2 patents, his work focuses on innovative solutions for environmental challenges.

Latest Patents

One of his latest patents is titled "Use of grafted cellulose for purifying water." This invention relates to the use of grafted celluloses in fibrous forms, such as paper and non-woven webs, which contain quaternary ammonium functions. These materials are designed to eliminate humic substances and nitrates found in natural water or industrial sewage. The grafted cellulose is produced through radical grafting using a non-saturated monomer with quaternary ammonium functions, specifically quaternized diethyl-amino-ethyl methacrylate. The material exhibits a capacity of greater than or equal to 0.2 meq/g.

Another significant patent by Combes is the "Process for the retention of a substance dissolved in a solution." This process involves adding an excess of a polyelectrolyte to a solution, which forms an ionic association with the dissolved substance intended for retention. The solution is then brought into contact with a material possessing ionic groups that retain the polyelectrolyte. This can be achieved through filtration or tangential bathing. The polyelectrolyte can be retained by ion exchange or charge repulsion effects, and the material is typically a fibrous substance with ionic groups obtained through grafting.

Career Highlights

Throughout his career, Jean-Francois Combes has worked with esteemed organizations such as the Institut Textile De France and the Institut Textile De France-Centre Technique Industriel. His work in these institutions has allowed him to develop and refine his innovative ideas.

Collaborations

Combes has collaborated with notable individuals in his field, including Daniel Wattiez and Roger Chatelin. These partnerships have contributed to the advancement of his research and inventions.

Conclusion

Jean-Francois Combes is a distinguished inventor whose work in water purification and material science has led to valuable patents. His innovative approaches address critical environmental issues and demonstrate the importance of research and collaboration in the field of invention.