Autoclave method for making ferric oxide
AssigneeKing Fahd University of Petroleum and Minerals
InventorsMuhammad Ramzan Saeed Ashraf JANJUA, Saba JAMIL, Shanza Rauf KHAN
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Abstract
A thermal method of forming ferric oxide nano/microparticles with predominant morphology is described using different solvents. Methods of using the Fe3O4 nano/microparticles as catalysts in the reduction of nitro compounds with sodium borohydride to the corresponding amines and decomposition of ammonium salts.
Claims9
1-2. (canceled)
The method of claim 18, wherein the ferric halide is ferric chloride.
The method of claim 18, wherein the alkali metal salt of a carboxylic acid is sodium acetate.
-9. (canceled).
The method of claim 18, wherein the heating temperature is in the range of about 195 to 205° C.
11-17. (canceled)
An autoclave method, comprising:
- heating a composition comprising a ferric halide and an alkali metal salt of a carboxylic acid in hexane at a temperature of 150-300° C. in a sealed container to form ferric oxide microparticles, wherein the ferric halide is selected from the group consisting of ferric chloride and ferric bromide;
- and
- contacting an ammonium salt with the ferric oxide microparticles,
- wherein the ferric oxide microparticles have an octahedron morphology and a particle diameter of about 4.3 μm,
- wherein on the contacting the ammonium salt is decomposed, and
- wherein the ammonium salt has a final decomposition temperature of 420° C.
(canceled)
Dependencies are inferred from the claim text.