Method of treating a subsurface formation with ferrous iron...

Details Method of treating a subsurface formation with ferrous iron... Method of treating a subsurface formation with ferrous iron...

2007-01-23

2007-01-23

Upton, Christopher (Department: 1724)

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

C210S722000, C210S747300, C210S757000, C210S913000, C405S128500, C405S129250

Reexamination Certificate

active

10963607

ABSTRACT:
A method for treating a subsurface formation with a ferrous compound, to reduce a contaminant therein, involves introducing into the subsurface formation a ferrous compound in combination with sodium hydrosulfite in an amount sufficient to substantially prevent precipitation, during the introducing, of a major portion of the ferrous compound. The method was found to be useful in the reduction of hexavalent chromium to trivalent chromium at a Superfund site.

REFERENCES:
patent: 4260491 (1981-04-01), Cassidy et al.
patent: 5122279 (1992-06-01), Guess
patent: 5130051 (1992-07-01), Falk
patent: 5380441 (1995-01-01), Thornton
patent: 5397478 (1995-03-01), Pal et al.
patent: 5505857 (1996-04-01), Misra et al.
patent: 5951457 (1999-09-01), James
patent: 2003/0185630 (2003-10-01), Price et al.

Affiliated with

Also associated with

Rating

Method of treating a subsurface formation with ferrous iron... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of treating a subsurface formation with ferrous iron..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of treating a subsurface formation with ferrous iron... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3742189