Process for regenerating and protonating a weak-base anion...

Details Process for regenerating and protonating a weak-base anion... Process for regenerating and protonating a weak-base anion...

2011-01-25

2011-01-25

Savage, Matthew O (Department: 1776)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S683000

Reexamination Certificate

active

07875186

ABSTRACT:
The invention consists of a water treatment process using selective and regenerable weak base anion exchange resins to remove any number of complex anions, especially oxyanions including perchlorate, nitrate, chlorate, arsenate, selenate, and chromate, from aqueous solutions. The treatment process is comprised of three key processes including 1) pretreatment to lower pH, 2) ion exchange, and 3) post treatment to adjust pH and alkalinity. The invention also includes processes for regenerating weak base anion resins and treatment of the residuals generated. This invention employs pressurized treatment, carbon dioxide management, and reuse of regenerating solution to minimize pumping and treatment costs.

REFERENCES:
patent: 2404367 (1946-07-01), Durant et al.
patent: 3417016 (1968-12-01), Yagishita
patent: 3531401 (1970-09-01), Crits
patent: 4036751 (1977-07-01), Orita et al.
patent: 4172185 (1979-10-01), Petheram
patent: 5098579 (1992-03-01), Leigh et al.
patent: 6066257 (2000-05-01), Venkatesh et al.
patent: 6077432 (2000-06-01), Coppola et al.
patent: 6448299 (2002-09-01), Brown et al.
patent: 6878286 (2005-04-01), Jensen et al.
patent: 6905111 (2005-06-01), Nagasaka et al.
patent: 6908560 (2005-06-01), Guter
patent: 2005/0269269 (2005-12-01), Jensen et al.
patent: 2060430 (1981-05-01), None

Affiliated with

Also associated with

Rating

Process for regenerating and protonating a weak-base anion... 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 for regenerating and protonating a weak-base anion..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for regenerating and protonating a weak-base anion... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2697756