Process using rare earths to remove oxyanions from aqueous...

Details Process using rare earths to remove oxyanions from aqueous... Process using rare earths to remove oxyanions from aqueous...

2008-03-04

2008-03-04

Barry, Chester T (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S683000, C210S688000, C210S263000

Reexamination Certificate

active

11190472

ABSTRACT:
Oxyanions of various contaminant elements, such as chromium, antimony, molybdenum, tungsten, vanadium and uranium, are removed from water and other aqueous feeds by treating the feed with (1) a sorbent comprising one or more rare earth compounds, usually mixed or supported on particulate solids having a cation exchange capacity less than 20 milliequivalents per 100 grams or (2) an aqueous solution of one or more soluble rare earth compounds.

REFERENCES:
patent: 3956118 (1976-05-01), Kleber et al.
patent: 4046687 (1977-09-01), Schulze
patent: 4581229 (1986-04-01), Petrow
patent: 5053139 (1991-10-01), Dodwell et al.
patent: 5603838 (1997-02-01), Misra et al.
patent: 6197201 (2001-03-01), Misra et al.
patent: 6350383 (2002-02-01), Douglas
patent: 6383395 (2002-05-01), Clarke et al.
patent: 6524487 (2003-02-01), Kulperger et al.
patent: 6800204 (2004-10-01), Harck et al.
patent: 6833123 (2004-12-01), Huang et al.
patent: 6855665 (2005-02-01), Blake et al.
patent: 6858147 (2005-02-01), Dukhin et al.
patent: 6863825 (2005-03-01), Witham et al.
patent: 2004/0144729 (2004-07-01), Witham et al.
Zhang, Yu, Yang, Min, Huang, Xia, “Arsenic(V) Removal With A Ce(IV)-Doped Iron Oxide Adsorbent,”Chemosphere, vol. 51, No. 9, Jun. 2003, pp. 945-952.
Ahmed, M. Feroze, “An Overview of Arsenic Removal Technologies in Bangladesh and India,” Buet-Unu International Workshop on Technologies for Arsenic Removal from Drinking Water, May 5-7, 2001, pp. 251-269.

Affiliated with

Also associated with

Rating

Process using rare earths to remove oxyanions from aqueous... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process using rare earths to remove oxyanions from aqueous..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process using rare earths to remove oxyanions from aqueous... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3952019