Vanadium and tungsten recovered from scrap selective catalytic reduction catalyst

Vanadium and tungsten recovered from scrap selective catalytic reduction catalyst

  • CN 104,561,554 A
  • Filed: 12/25/2013
  • Published: 04/29/2015
  • Est. Priority Date: 10/22/2013
  • Status: Active Application
First Claim
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1. from discarded selective catalytic reduction catalysts, reclaim a method for vanadium and tungsten, it is characterized in that it comprises:

  • The discarded selective catalytic reduction catalysts comprising vanadium source and tungsten source is provided;

    Pre-treatment step, comprises calcination steps and impregnation steps;

    Described calcination steps is mixed with calcination agent by described discarded selective catalytic reduction catalysts and carries out calcination process, to form the discarded selective catalytic reduction catalysts through calcination process, described vanadium source and tungsten source are carried out reacting with described calcination agent respectively and form vanadic salts and tungsten salt, andDescribed impregnation steps be impregnated in by the described discarded selective catalytic reduction catalysts through calcination process in the liquid of described vanadic salts that calcination process described in solubilized formed and tungsten salt, to dissolve described vanadic salts and tungsten salt and to form steeping fluid;

    Remove impurity step, remove the impurity in described steeping fluid, to form the steeping fluid of purifying;

    AndIon-exchange step, is adjusted to 1 to 3 by the pH value range of the steeping fluid of described purifying, forms liquid to be separated, with the vanadic salts in liquid to be separated described in Anion exchange resin separation and tungsten salt, obtains the solution containing vanadium, and the anionite-exchange resin of tungstenic.

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