The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2025
Filed:
Jan. 18, 2025
Institute of Agricultural Resources and Regional Planning, Caas, Beijing, CN;
Liang Yuan, Beijing, CN;
Yanting Li, Beijing, CN;
Bingqiang Zhao, Beijing, CN;
Shuiqin Zhang, Beijing, CN;
Meng Xu, Beijing, CN;
Jiukai Xu, Beijing, CN;
Yingqiang Zhang, Beijing, CN;
Abstract
An oxidant for humic acid modification and a method for preparing humic acid rich in carboxyl groups are provided. The oxidant used for humic acid modification includes cobalt-nickel catalyst loaded on biochars and hydrogen peroxide solutions. When preparing humic acid rich in carboxyl groups, first dissolving the humic acid in a 2 wt % sodium hydroxide solution to prepare a sodium humate solution; then, under stirring conditions, adding the oxidant used for humic acid modification to the sodium humate solution and react at 45-55° C. for 90-150 minutes; then freeze-drying to obtain the final product. The present disclosure selectively breaks and destroys the aromatic carbon structure of humic acid by using cobalt-nickel catalyst loaded on biochar in combination with hydrogen peroxide solution, and avoids the release of carbon dioxide generated by excessive oxidation of humic acid carbon structure, thereby directionally increasing the carboxyl content of humic acid.