METHOD FOR PREPARING NITROGEN-RICH OR NUTRITIOUS SLOW-RELEASE FERTILIZER THROUGH IN-SITU STRAW MODIFICATION/REACTIVE EXTRUSION INTEGRATED CONTINUOUS PROCESS
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United States of America Patent
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Issued Date -
Sep 15, 2022
app pub date -
May 31, 2022
filing date -
Jan 27, 2022
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Abstract
Disclosed is a method for preparing a nitrogen-rich or nutritious straw-based slow-release fertilizer through In-Situ straw modification/reactive extrusion integrated continuous process. In the method, the liquid reaction precursor of a nitrogen-containing biodegradable slow-release fertilizer is mixed with crop straw to obtain a reaction mixture, or the liquid reaction precursor of a nitrogen-containing biodegradable slow-release fertilizer, crop straw and a soluble fertilizer are mixed to obtain a reaction mixture. The reaction mixture is subjected to extrusion in a screw extruder to produce the nitrogen-rich or nutritious straw-based slow-release fertilizer.
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