C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
252/44, 260/426.
C07F 5/00 (2006.01) B01J 31/22 (2006.01) C01F 17/00 (2006.01) C07C 59/52 (2006.01) C07C 65/03 (2006.01)
Patent
CA 1316176
15-056 PROCESS FOR PREPARING COLLOIDAL ALCOHOL-DISPERSIBLE ASSOCIATION COMPLEXES OF CERIC DIOXIDE AND A HYDROXYPHENYL CARBOXYLIC ACID AND COMPLEXES THEREOF WITH FREE ORGANIC ACIDS ABSTRACT OF THE DISCLOSURE A process is provided for preparing colloidal dispersions of alcohol-dispersible association complexes of ceric dioxide and a hydroxyphenyl carboxylic acid having from about seven to about twenty carbon atoms in a molar ratio CeO2/acid of at least about 6:1 which comprises: (1) mixing (a) ceric dioxide comprising ammonium nitrate or ammonium and nitrate ions in an amount within the range from about 3 to about 14% by weight of the ceric dioxide and a member selected from the group consisting of water, methanol, acetic acid and mixtures thereof in an amount usually from about 10 to about 60 g per mole of CeO2, sufficient to effect reaction with (b) a hydroxyphenyl carboxylic acid having from about sevent to about twenty carbon atoms (c) an aliphatic alcohol, such as methanol, isopropanol, 2-ethoxy ethanol, etc. at a temperature within the range from room temperature to about 100°C, thereby effecting dispersion of the ceric dioxide in the aliphatic alcohol; and (2) removing water, methanol, acetic acid or mixtures thereof, and separating undissolved particles of solid material such as ammonium nitrate and undissolved cerium dioxide. ii
575122
Gradeff Peter S.
Ramirez Carlos
Gowling Lafleur Henderson Llp
Gradeff Peter S.
Ramirez Carlos
Rhone-Poulenc Inc.
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