Preparation of dispersible cerium compound

Details Preparation of dispersible cerium compound Preparation of dispersible cerium compound

1985-11-20

1987-10-13

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

2523131, 25231501, 2523635, 423 215, 423263, 423DIG14, B01J 1300, C01F 1700

Patent

active

046997326

ABSTRACT:
The invention provides a process for the preparation of a dispersible cerium compound (i.e. a cerium compound which may be dispersed in a liquid to give a colloidal dispersion (i.e. a sol)).
The process involves replacing a first species of ions associated with the cerium compound by a second species of ions (e.g. hydroxyl ions) and subsequently replacing the second species of ions of the cerium compound with a third species of ions (e.g. counter-ions).
The replacing of the ions may be effected, for example, by ion-exchange.
Cerium (IV) oxide hydrate is an example of a cerium compound which can be made dispersible in accordance with the invention.

REFERENCES:
patent: 3761571 (1973-09-01), Woodhead
patent: 4231893 (1980-11-01), Woodhead
patent: 4356106 (1982-10-01), Woodhead et al.
Danielsson: "Adsorption of a Number of Elements from HNO.sub.3 -HF and H.sub.2 SO.sub.4 -HF Solutions by Cation and Anion Exchange", Acta Chem. Scand. 19, (1965), 1859-1874.

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