Method for recovering rare earth element from waste catalytic cracking catalyst containing rare earth element

Method for recovering rare earth element from waste catalytic cracking catalyst containing rare earth element

  • CN 102,453,805 A
  • Filed: 10/27/2010
  • Published: 05/16/2012
  • Est. Priority Date: 10/27/2010
  • Status: Active Application
First Claim
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1. method that from the useless catalytic cracking catalyst that contains REE, reclaims REE is characterized in that this method comprises:

  • (1) floods said useless catalytic cracking catalyst with acid steeping fluid, and carry out solid-liquid separation, obtain leach liquor;

    And(2) said leach liquor is contacted with the aqueous solution that contains alkali metal hydroxide;

    And carry out solid-liquid separation;

    Obtain the liquid product of rich rare earth ion, the amount of the alkali metal hydroxide in the aqueous solution of said alkali metal hydroxide makes the pH value of said leach liquor be 4.5-6Wherein, be benchmark with the TV of leach liquor, the content of cerium is less than 1000 mcg/ml in the said leach liquor.

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