Reactive extrusion preparation process of weathered coal humic acid/urea formaldehyde compound and fertilization method

The invention relates to the technical field of non-metal compounds, in particular to a weathered coal humic acid/urea formaldehyde compound reaction extrusion preparation process and a fertilization method, in an alkaline environment, paraformaldehyde is depolymerized into formaldehyde micromolecul...

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Bibliographische Detailangaben
Hauptverfasser:	LIAN KAI, DUAN HAOYU, ZHOU ZIXUAN, TAI JIEYU, LI XU, MIAO RUI, TONG YINGFANG, WU CHAOYANG, ZHANG WEI, LIU YAQING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AGRICULTURE ANIMAL HUSBANDRY CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS FERTILISERS FERTILISERS CHARACTERISED BY THEIR FORM FERTILISING FISHING FORESTRY HUMAN NECESSITIES HUNTING 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 NITROGENOUS FERTILISERS ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PLANTING SOWING THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING TRAPPING
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Beschreibung
Zusammenfassung:	The invention relates to the technical field of non-metal compounds, in particular to a weathered coal humic acid/urea formaldehyde compound reaction extrusion preparation process and a fertilization method, in an alkaline environment, paraformaldehyde is depolymerized into formaldehyde micromolecules, and the formaldehyde micromolecules react with urea in a system to generate monohydroxymethyl urea and dimethylol urea. Then, under the strong shearing action of screws of the double-screw reactive extruder, macromolecular weathered coal humic acid in the system is cracked into relatively small molecular weathered coal humic acid, and a large amount of active group carboxyl is exposed; wherein one part of the humic acid and amino groups on urea formaldehyde molecules generated by polycondensation in the reaction extrusion process in the system are subjected to dehydration condensation reaction immediately to generate a weathered coal humic acid/urea formaldehyde compound, and particles of the weathered coal hum