US 11,702,374 B2
Biochar product, its use in fertilizers, and methods of making the biochar
Santanu Bakshi, Ames, IA (US); Robert C. Brown, Ames, IA (US); and Ryan G. Smith, Ames, IA (US)
Assigned to IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC., Ames, IA (US)
Filed by IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC., Ames, IA (US)
Filed on Jun. 2, 2021, as Appl. No. 17/336,804.
Claims priority of provisional application 63/040,222, filed on Jun. 17, 2020.
Prior Publication US 2021/0395159 A1, Dec. 23, 2021
Int. Cl. C05D 9/00 (2006.01); C05G 3/80 (2020.01)
CPC C05D 9/00 (2013.01) [C05G 3/80 (2020.02)] 11 Claims
OG exemplary drawing
 
1. An iron impregnated biochar, wherein the biochar has a ratio of iron (III) to iron (II) ranging from 5:1 to 10:1, and wherein the biochar comprises an adsorbed phosphate anion.