Process for recovering catalyst transition metals from salt-containing reaction mixtures
AssigneeDegussa AG
InventorsFrank Bauer, Uwe Prange, Christoph Theis
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Abstract
Transition metals may be recovered from a salt-containing mixture containing at least one transition metal compound, salts, and organic compounds by separating from the salt-containing mixture a mixture of the transition metal compound and the salts. This mixture, together with any organic impurities, is introduced into a combustion zone, and the flue gas/salt mixture leaving the combustion zone is quenched with water. The combustion residue, containing the transition metal, is separated from the resulting quench solution, dried, and converted to fresh catalyst.
Claims26
A process for recovering at least one transition metal compound from a salt-containing mixture, comprising:
- separating a mixture comprising at least one transition metal compound and a least one salt from said salt-containing mixture by distillation, thereby obtaining a pulverulent residue;
- conveying said pulverulent residue to a combustion zone maintained at a temperature of from 900 to 2000° C., thereby forming a flue gas/salt mixture;
- quenching said flue gas/salt mixture with water, thereby forming a quench solution;
- separating a combustion residue comprising said at least one transition metal compound from said quench solution;
- and
- drying said combustion residue at a temperature of from 80 to 180° C.,
- wherein said salt-containing mixture comprises at least one transition metal compound, at least one salt, and at least one organic compound.
Dependencies are inferred from the claim text.