The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1987
Filed:
Nov. 20, 1985
Applicant:
Inventor:
James L Woodhead, Didcot, GB;
Assignee:
United Kingdom Atomic Energy Authority, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; C01F / ;
U.S. Cl.
CPC ...
252314 ; 2523131 ; 25231501 ; 2523635 ; 423 215 ; 423263 ; 423D / ;
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.