David O DePree

Title: David O DePree: Innovator in Water Demineralization Technologies

Introduction

David O DePree is a notable inventor based in Loomis, CA (US). He has made significant contributions to the field of water demineralization, holding a total of 3 patents. His innovative approaches have the potential to enhance the efficiency of water treatment processes.

Latest Patents

One of his latest patents involves the use of buffering agents in an improved process for water demineralization. This process utilizes a first separate column of weakly acidic cation exchange resin, a second separate column of weakly basic anion exchange resin, and a third separate column of weakly acidic cation exchange resin. The cation resin is buffered with a dihydroxy-substituted amine. When saline feed is passed through the system, the cations of the feed are exchanged for the buffer, releasing buffered salts. The buffered salts, when passed through the anion exchange column, are split, releasing the buffer that is then deposited on the third cation resin column. This innovative method allows for the efficient use of weak cation and anion exchange resins in a separate, fixed-bed configuration.

Another significant patent focuses on the recovery of ion-exchange regenerants and the precipitation of mineral salts. The spent cation and anion regenerant streams are combined to form a weak dissociable complex of the regenerants, which helps to reconstitute the removed inorganic mineral salt. The mixture is adjusted stoichiometrically to balance the anion and cation of the removed salt. The salt is precipitated by limiting solubility, either by concentrating the mixture or by reducing the solubility of the salts through the addition of a water-miscible solvent such as methanol. This process allows for the recovery and reuse of regenerants, enhancing the sustainability of water treatment systems.

Career Highlights

David O DePree is currently associated with Aerojet-General Corporation, where he continues to develop innovative solutions in water treatment technologies. His work has been instrumental in advancing the efficiency and effectiveness of water demineralization processes.

Collaborations

David has collaborated with various professionals in his field, including his coworker Arthur Katzakian, Jr. Their combined expertise contributes to the development of cutting-edge technologies in water treatment.

Conclusion