Back to results
US 12,257,570 B2Granted
Autoclave method for making ferric oxide
AssigneeKing Fahd University of Petroleum and Minerals
InventorsMuhammad Ramzan Saeed Ashraf Janjua, Saba Jamil, Shanza Rauf Khan
Life of this patent
Estimating the term…
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.
Claims4
A ferric oxide synthesis 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.
3 more elements
Dependencies are inferred from the claim text.