US 12,090,469 B2
Method for reducing nitrogenous phenols
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 Mar. 26, 2024, as Appl. No. 18/616,283.
Application 18/116,607 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 18/616,283 is a continuation of application No. 18/116,607, filed on Mar. 2, 2023.
Prior Publication US 2024/0246064 A1, Jul. 25, 2024
This patent is subject to a terminal disclaimer.
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)] 9 Claims
OG exemplary drawing
 
1. A method for reducing nitrogenous phenols, comprising:
contacting a solution comprising a nitrophenol and sodium borohydride with a ferric oxide octahedral particles catalyst, wherein the ferric oxide octahedral particles catalyst has an octahedron morphology in an amount that is more than any other morphology or combination of morphologies;
wherein the ferric oxide octahedral particles catalyst is formed by:
heating, in the absence of a templating agent, a composition comprising a ferric halide and an alkali metal salt of a carboxylic acid in a solvent at a temperature of 150-300° C. in a sealed container,
wherein the solvent consists of hexane.