The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2016
Filed:
Nov. 16, 2013
Applicant:
Resintech, Inc., West Berlin, NJ (US);
Inventors:
Michael C. Gottlieb, Cherry Hill, NJ (US);
Peter S. Meyers, Marlton, NJ (US);
Assignee:
Resintech, Inc., West Berlin, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/42 (2006.01); B01J 41/04 (2006.01); B01J 41/12 (2006.01); B01J 47/02 (2006.01); C02F 1/66 (2006.01); C02F 1/00 (2006.01); C02F 101/22 (2006.01); C02F 103/16 (2006.01);
U.S. Cl.
CPC ...
C02F 1/42 (2013.01); B01J 41/046 (2013.01); B01J 41/125 (2013.01); B01J 47/026 (2013.01); C02F 1/66 (2013.01); C02F 1/008 (2013.01); C02F 2001/422 (2013.01); C02F 2101/22 (2013.01); C02F 2103/16 (2013.01); C02F 2209/003 (2013.01); C02F 2209/06 (2013.01); C02F 2209/44 (2013.01); C02F 2301/08 (2013.01); C02F 2303/00 (2013.01);
Abstract
A method of removing chromium from water using a weak base anion exchange resin at a pH above about 5 includes the step of periodically reducing a flow of the water through the ion exchange resin for a rest period, such that a secondary mechanism of chromium removal predominates, wherein chromium ions are removed from the weak base anion exchange groups and precipitated inside the ion exchange resin. In an alternative embodiment, rather than resting, the ion exchange resin is periodically conditioned with an acid so as to enhance the secondary mechanism.