US 12,257,570 B2
Autoclave method for making ferric oxide
Muhammad Ramzan Saeed Ashraf Janjua, Dhahran (SA); Saba Jamil, Dhahran (SA); and Shanza Rauf Khan, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on Jul. 22, 2024, as Appl. No. 18/779,745.
Application 18/116,666 is a division of application No. 15/992,950, filed on May 30, 2018, granted, now 11,628,423, issued on Apr. 18, 2023.
Application 18/779,745 is a continuation of application No. 18/116,666, filed on Mar. 2, 2023, granted, now 12,076,708.
Prior Publication US 2024/0408581 A1, Dec. 12, 2024
Int. Cl. B01J 23/745 (2006.01); B01J 35/23 (2024.01); B01J 35/50 (2024.01); B01J 35/51 (2024.01); B01J 37/08 (2006.01); C01G 49/06 (2006.01); C07C 213/02 (2006.01)
CPC B01J 23/745 (2013.01) [B01J 35/23 (2024.01); B01J 35/50 (2024.01); B01J 35/51 (2024.01); B01J 37/08 (2013.01); C01G 49/06 (2013.01); C07C 213/02 (2013.01); C01P 2002/72 (2013.01); C01P 2004/03 (2013.01); C01P 2004/04 (2013.01); C01P 2004/34 (2013.01); C01P 2004/38 (2013.01); C01P 2004/41 (2013.01); C01P 2004/61 (2013.01); C01P 2004/64 (2013.01)] 4 Claims
OG exemplary drawing
 
1. 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.