Title:
【発明の名称】使用済み触媒の回収
Document Type and Number:
Japanese Patent JPH09506675
Kind Code:
A
Abstract:
A process is disclosed for converting a spent catalyst from conventional fluorination processes into a commercially useful tantalum or niobium oxide such as Ta(OH)5, Ta2O5, Nb(OH)5, or Nb2O5. The process broadly relates to dissolving the spent catalyst into water or an aqueous hydrofluoric acid solution, separating and disposing the undissolved residue, extracting the aqueous solution with a suitable solvent such as methyl isobutyl ketone (MIBK), and obtaining useful tantalum or niobium oxide products.
Inventors:
Felix, Vinch Martinis
Application Number:
JP51692295A
Publication Date:
June 30, 1997
Filing Date:
December 13, 1994
Export Citation:
Assignee:
E.I.du Pont de Nemours & Company
International Classes:
B01J27/32; B01J38/00; B01J38/48; B01J38/50; B01J38/60; C01G33/00; C01G35/00; C22B7/00; C22B34/24; (IPC1-7): C22B34/24; B01J38/00; C01G33/00; C01G35/00; C22B7/00
Attorney, Agent or Firm:
Chika Takagi (2 outside)