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. 23, 1993
Filed:
Aug. 10, 1992
Michael J O'Brien, Basking Ridge, NJ (US);
The Graver Company, Union, NJ (US);
Abstract
A method for regenerating exhausted anion and cation exchange resins for service in an associated mixed bed demineralizer. The method utilizes a portion of the exhausted anion and cation resins to form buffer zones which reduce cross-contamination between the anion and cation resins during regeneration. Alternatively, a relatively inert material having a specific density intermediate to that of the anion and cation resins can be used to form the buffer zones. The materials which form the buffer zones remain in the regeneration system and are not returned to the service vessels with the regenerated resin. The method includes an improved technique for terminating the transfer of cation resin from a separation vessel.