Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2006-04-07
2010-10-12
Barry, Chester T (Department: 1797)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S677000, C210S743000
Reexamination Certificate
active
07811457
ABSTRACT:
A method of regenerating N-Methyl-D-glu-camine-functional resin that has been used for boron-removal uses a closed recirculating loop for treating the conjugate acid salt of the N-Methyl-D-glucamine functionality of the resin. The new method reduces rinse water demand and improves pH control in a water treatment system. The new method can be used to improve the performance of boron-selective resins in stand-alone systems or as a second stage in a reverse osmosis seawater desalination system. The regeneration method is useful in any application where weakly basic anion exchange resin in the conjugate acid salt form is to be regenerated (neutralized) by alkaline treatment. Possible end use applications are in drinking water processing, agricultural water treatment, sweetener production, waste water processing, mining hydrometallurgy, and condensate polishing.
REFERENCES:
patent: 3531401 (1970-09-01), Crits
patent: 6258278 (2001-07-01), Tonelli et al.
patent: 2008/0173583 (2008-07-01), Boodoo et al.
patent: 60022933 (1985-02-01), None
patent: 60048150 (1985-03-01), None
patent: 10085743 (1998-04-01), None
patent: 2001314859 (2001-11-01), None
patent: 2003094051 (2003-04-01), None
Robert Kunin and Albert F. Preuss; “Characterization Of A Boronspecific Ion Exchange Resin”; Industrial and Engineering Chemistry: Product, Research and Development;1964; pp. 304-306; vol. 3; Issue 4; Rohm & Haas Co.; Philadelphia, PA.
O. Recepoglu and U. Bekker; “A Preliminary Study On Boron Removal From Kizildere/Turkey Geothermal Waste Water”; Geothermics; 1991; pp. 83-89; vol. 20; Issue 1-2; Istanbul Technical University, Faculty of Chemical an dMetallugical Engineering; Istanbul, Turkey.
Nissim Nadav; “Boron Removal From Seawater Reverse Osmosis Permeate Utilizing Selective Ion Exchange Resin”; Desalination; 1999; pp. 131-135; vol. 124; Issue 1-3; Mekorot Water Co., Desalination and Special Projects Division; Aviv, Israel.
Marie-Odile Simonnot, Christophe Castel, Miguel Nicolai, Christophe Rosin, Michel Sardin and Henri Jauffret; “Boron Removal From Drinking Water With A Boron Selective Resin: Is The Treatment Really Selective?”; Water Research; 2000; pp. 109-116; vol. 34, Issue 1; Laboratoire des Sciences du Genie Chimpque CNRS-ENSIC; Volvie Cedex, France.
Charles R. Marston et al; “International Search Report”; Patent Cooperation Treaty; PCT/US2006/013145 filed on Apr. 7, 2006.
Barry Chester T
Black Edward W.
Dow Global Technologies Inc.
LandOfFree
Alkaline regeneration of N-methyl-D-glucamine functional resins does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Alkaline regeneration of N-methyl-D-glucamine functional resins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alkaline regeneration of N-methyl-D-glucamine functional resins will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4165460