Method of regenerating ZrF.sub.4 pickling solutions

Details Method of regenerating ZrF.sub.4 pickling solutions Method of regenerating ZrF.sub.4 pickling solutions

1989-02-24

1990-06-26

Russel, Jeffrey E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

423390, C01G 2504, C01B 908, C01B 2146, C01D 302

Patent

active

049370545

ABSTRACT:
A process is disclosed for the regeneration of pickling solutions which contain ZrF.sub.4 by addition of a Na compound in which a charge of the pickling solution to be regenerated is analyzed and heated. The amount of Na required for the regeneration is determined in each case and is admixed with intense stirring. Then the mixture is cooled, the precipitated NaZrF compounds are separated and a regenerated pickling solution is recovered.

REFERENCES:
patent: 4105469 (1978-08-01), Megy et al.
patent: 4330342 (1982-05-01), Fennemann et al.
Levenspiel, O. "Chemical Reaction Engineering" 2nd ed. Wiley & Sons N.Y., pp. 93-96 (1972).

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