Recovery of tantalum and/or niobium pentafluorides from a hydroc

Details Recovery of tantalum and/or niobium pentafluorides from a hydroc Recovery of tantalum and/or niobium pentafluorides from a hydroc

1976-12-03

1977-12-27

Douglas, Winston A.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

208134, 260666R, 260666P, 260671R, 26068347, 26068368, 2606837, 26068374, 423 62, 423 64, 423492, B01J 2732, C07C 354, C07C 528, C10G 3506

Patent

active

040654052

ABSTRACT:
Tantalum and/or niobium pentafluorides may be recovered from a deactivated or partially deactivated hydrocarbon conversion catalyst comprising (a) a metal pentafluoride selected from the group consisting of tantalum pentafluoride, niobium pentafluoride and mixtures thereof and (b) hydrogen fluoride, by distilling said catalyst in the presence of a Lewis acid containing neither of these Group V metals, thereby displacing a pentahalide of tantalum and/or niobium into the vapor phase from which it can be condensed. Addition of hydrogen fluoride then converts the pentahalide to the pentafluoride.

REFERENCES:
patent: 2928722 (1960-03-01), Scheller et al.
patent: 3830871 (1974-08-01), Mayer et al.
patent: 3948761 (1976-04-01), Siskin et al.

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