Process for preparing dazomet dustless stable fine granule

A process for preparing dazomet dust free stabilized fine granules from methylamine and carbon sulfide as raw material through the steps of, diluting methylamine with water in reactor, agitating, dropping carbon sulfide and controlling reaction temperature, continuing stirring 1-2h, stewing to obtain oil layer, thus the intermediate compound N-methyl dithiocarbamic acid is prepared, adding into reactor in turn the intermediate compound N-methyl dithiocarbamic acid prepared in the previous step and the water solution of soluble macromolecular compound, surface active agent, stirring, dropping formaldehyde solution and controlling reaction temperature, stewing for filtering, thus dazomet fine granule with 100 mesh average grain diameter can be prepared by drying the filter cake. 一种棉隆无粉尘稳定微粒剂的制备工艺，属于农用化学品领域。本发明以甲胺、二硫化碳为原材料合成中间体N-甲基二硫代氨基甲酸，然后与甲醛关环反应得棉隆：在反应器中甲胺用水稀释后开动搅拌，开始滴加二硫化碳并控制反应温度，加料毕继续搅拌1-2h，停止搅拌静置分层并分出油层，即得中间体N-甲基二硫代氨基甲酸；在反应器中依次加入第一步反应所得中间体N-甲基二硫代氨基甲酸、可溶性高分子化合物的水溶液、表面活性剂，开动搅拌，体系均匀后开始滴加甲醛溶液并控制反应温度，加料毕继续搅拌0.5-1h，停止反应静置过滤，将滤饼烘干即得平均粒径为100目棉隆微粒剂。本发明工艺成本低、收率高，还可节省设备、能源、人工和场地。