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

1987-11-10

1989-09-05

McFarlane, Anthony

Chemistry of inorganic compounds

Boron or compound thereof

Oxygen containing

423279, 423280, 423288, 423292, 423462, 423463, 423472, 423492, 423593, C01B 3506

Patent

active

048637068

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, 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 actone.
The gel is calcined at relatively low temperatures to provide zirconia which is either very pure or stabilized in varied degrees.

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patent: 4323381 (1982-04-01), Matsuyama et al.
patent: 4731234 (1988-03-01), Wada et al.

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