Modified humic acid as well as preparation method and application thereof

• Main Authors: ZHAO BINGQIANG, LI JUN, LIU XIAOBO, QU SHUDONG, WEI YANQING, YUAN LIANG, WANG ZIHAO, ZHANG SHUIQIN, XU JIUKAI, JIAO WEIPING, LI YANTING, XU MENG, SUN YINGXIANG
• Format: Patent
• Language: Chinese; English
• Published: 23.02.2024
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; MANUFACTURE THEREOF; METALLURGY; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS; ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses modified humic acid as well as a preparation method and application thereof. The molecular weight of the modified humic acid is 80 kDa to 150 kDa, the content of acidic functional groups of the modified humic acid is greater than or equal to 20 mmol/g, the content of carboxyl groups of the modified humic acid is greater than or equal to 12 mmol/g, the content of phenolic hydroxyl groups of the modified humic acid is greater than or equal to 6 mmol/g, the O/C of the modified humic acid is greater than or equal to 0.8, and the E4/E6 of the modified humic acid is greater than or equal to 4. Therefore, the modified humic acid has a specific functional group structure, proper functional group content, relatively high oxygen-carbon ratio and proper aromatization degree, has excellent phosphorus activation performance, and is outstanding in phosphorus activation effect when being applied to phosphorus activation. 本发明公开了改性腐植酸及其制备方法、改性腐植酸的应用。所述改性腐植酸的分子量为80kDa～150kDa，所述改性腐植酸的酸性官能基团含量大于等于20mmol/g