Process for producing zirconium sols and gels, and process for p

Details Process for producing zirconium sols and gels, and process for p Process for producing zirconium sols and gels, and process for p

1986-12-24

1988-03-15

Davis, Curtis R.

Chemistry of inorganic compounds

Boron or compound thereof

Oxygen containing

502202, 502349, 423277, 423411, 423608, C01B 3510, C01B 3514

Patent

active

047312343

ABSTRACT:
A process for producing acidic boratozirconium chloride sols which comprises: reacting a zirconium compound with a boron compound in molar ratios of B/Zr of 0.3-1.2 together with a compound of a metal M other than boron, the metal M being selected from the group consisting of divalent, trivalent, tetravalent and pentavalent metals in molar ratios of M/Zr of about 0.01-1 in water in the presence of chloride ions in molar ratios of Cl/Zr of not less than about 1.
The acidic boratozirconium chloride sol may be converted to basic boratozirconium sols by reacting the acidic sol with a basic carbonate compound such as ammonium carbonate.
The sols, either acidic or basic, are readily gelled by contact with a dehydration solvent such as methanol or acetone.
The gel is calcined at relatively low temperatures to provide zirconia which is either very pure or stabilized in varied degrees.

REFERENCES:
patent: 3024085 (1962-03-01), Habernickel et al.
patent: 3085893 (1963-04-01), Buckman et al.
patent: 3352637 (1967-11-01), Heymer et al.
patent: 3423193 (1969-01-01), Stynes
patent: 3545922 (1970-12-01), Nevenschwander
patent: 4283377 (1981-08-01), Fenner

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