Process for preparing dispersible sulfate, preferably barium...

Details Process for preparing dispersible sulfate, preferably barium... Process for preparing dispersible sulfate, preferably barium...

2004-05-04

2009-08-18

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C423S551000, C423S554000, C106S461000, C106S471000, C977S773000, C977S775000

Reexamination Certificate

active

07575734

ABSTRACT:
The invention is directed to a process for the manufacture of optionally doped nanoparticulate metal sulfate wherein the metal is selected from polyvalent metals or monovalent transition metals, said process comprising the step of heating a reaction mixture comprising a) a polar organic solvent comprising at least two hydroxy groups or a polar organic solvent comprising at least one sulfoxide group, b) a source of a polyvalent metal or monovalent transition metal, a sulfate source, and optionally a dopant metal source, and c) a base selected from i) bases having an aromatic N-containing heterocycle with the exception of imidazole, ii) bases having an aliphatic N-containing heterocycle, iii) aliphatic hydroxy-substituted amines, iv) aliphatic polyamines, v) aromatic amines, vi) ammonia and ammonia-releasing compounds, and vii) metal hydroxides. The invention is also directed to the resulting metal sulfate nanoparticles.

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