Process for the manufacture of zirconium oxide hydrate from gran

Details Process for the manufacture of zirconium oxide hydrate from gran Process for the manufacture of zirconium oxide hydrate from gran

1989-03-17

1991-03-26

Rosenberg, Peter D.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C01G 2502

Patent

active

050027492

ABSTRACT:
A process for the preparation of zirconia hydrate from zirconia by reaction of the latter with solid sodium hydroxide at 550.degree.-1,400.degree. C. to form Na zirconate; hydrolysis of the latter to form a suspension of zirconia hydrate in aqueous sodium hydroxide; separation of most of the aqueous sodium hydroxide; treatment of the zirconia hydrate containing residual aqueous sodium hydroxide with an ammonium salt; and separation, washing and dewatering of the purified zirconia hydrate obtained.
The zirconia hydrate can be used for the preparation of zirconium compounds.

REFERENCES:
patent: 1755512 (1930-04-01), Monk
patent: 4808397 (1989-02-01), Albizzati
patent: 4810680 (1989-03-01), Beckford

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