NOVELTY - Direct preparation of glyphosate microcapsule using glyphosate mother liquor by in-situ polymerization includes taking melamine-formaldehyde prepolymer, urea-formaldehyde resin, and gum arabic resin, adding water and triethanolamine, adjusting the pH at 4.5-5 by citric acid, adding sodium dodecylbenzene sulfonate and glyphosate mother liquor, continuously stirring, adding citric acid to adjust the pH of the reaction system at 3-4, adding water, stirring, adjusting the pH, stirring, raising the temperature, and stirring to obtain glyphosate microcapsule.    USE - Direct preparation of glyphosate microcapsule (claimed) used as slow-release herbicide.    ADVANTAGE - Compared with the traditional processes (e.g. physical and chemical-biological method, microelectrolysis treatment method, incineration, and electrocatalytic oxidation) for treating the glyphosate mother liquor, the method is energy-saving, environment-friendly, clean, and highly efficient.    DETAILED DESCRIPTION - Direct preparation of glyphosate microcapsule using glyphosate mother liquor by in-situ polymerization comprises:    (A) preparation of melamine resin by mixing 60-75 g melamine and 160-170 g of 37 vol.% formaldehyde aqueous solution, adding 2 vol.% sodium hydroxide water solution, adjusting pH at 8.5-9, reacting at 70 degrees C, when melamine is completely dissolved, adding 230-250 g water, stirring for 3 hours, and preparing into melamine-formaldehyde prepolymer A;    (B) preparing urea-formaldehyde resin by adding 60-75 g urea and 140-160 ml of 37% formaldehyde, adjusting the pH at 8-8.5 by triethanolamine, reacting at 70 degrees C for 1 hour, and preparing urea-formaldehyde prepolymer B;    (C) preparation of gum arabic resin by mixing 60-80 g gum arabic and 160-170 g of 37 vol.% formaldehyde, adding triethanolamine, adjusting the pH at 8-9, reacting for 30 minutes at 70 degrees C, adding 20-30 ml water and 40 g tetraethylenepentamine, stirring at 70 degrees C, adding 15 vol.% hydrochloric acid to adjust the pH at 3, reacting for 1 hour, adding 10% sodium hydroxide to adjust the pH at 4.5-5, continuously reacting at 55 degrees C, adding 400 g water and 10 vol.% sodium hydroxide to adjust the pH to neutral, and obtaining gum arabic resin C; and    (D) taking 15-20 g prepolymer A, 5-10 g prepolymer B, and 150-170 g prepolymer C, adding 60-80 ml water and 1-2 g triethanolamine, adjusting the pH at 4.5-5 by 10% citric acid, adding 1-5 g of 10 vol.% sodium dodecylbenzene sulfonate and 150-180 ml glyphosate mother liquor, continuously stirring at 30 degrees C, adding 10 vol.% citric acid to adjust the pH of the reaction system at 3-4, adding 200 ml water, stirring for 1 hour, adjusting the pH at 3-3.5, stirring for 2 hours, raising the temperature to 40 degrees C, and stirring for 3 hours to obtain glyphosate microcapsule.