Oxidant for humic acid modification and method for preparing carboxyl-rich humic acid

• Main Authors: XU JIUKAI, ZHAO BINGQIANG, LI YANTING, XU MENG, ZHANG YINGQIANG, YUAN LIANG, ZHANG SHUIQIN
• Format: Patent
• Language: Chinese; English
• Published: 05.07.2024
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses an oxidizing agent for humic acid modification and a method for preparing carboxyl-rich humic acid, and belongs to the technical field of humic acid modification. The oxidizing agent for humic acid modification comprises a biochar-loaded cobalt-nickel catalyst and a hydrogen peroxide solution. When the humic acid rich in carboxyl is prepared, firstly, the humic acid is dissolved in a sodium hydroxide solution with the concentration of 2wt%, and a sodium humate solution is prepared; adding an oxidizing agent for modifying humic acid into the sodium humate solution under a stirring condition, and reacting at 45-55 DEG C for 90-150 minutes; and then freeze-drying to obtain the product. The charcoal-loaded cobalt-nickel catalyst and the hydrogen peroxide solution are matched for use, the aromatic carbon structure of the humic acid can be selectively broken and damaged, the carbon structure of the humic acid can be prevented from generating carbon dioxide due to excessive oxidation to escap