| 摘要 |
<p>1,151,813. Urea fertilizers. ESSO RESEARCH & ENG. CO. 28 March, 1967 [14 Dec., 1966], No. 13996/67. Heading C1B. A fertilizer composition comprises urea, an inorganic urease inhibitor, and a hydrophobic substance. The inhibitor may be a copper, cobalt, silver, mercury, manganese, zinc, cadmium, nickel, lead, or sulphur compound; fluoride; cyanide; inorganic acid; phosphate; or polyphosphate. The hydrophobic substance may be a primary or secondary amine or diamine, amide, oleate, naphthenic acid, furfuryl compound, or silane. One or both additives may be incorporated in urea before prilling or applied as a coating to urea prills. The urea may be in the form of an NPK fertilizer. The composition may comprise 0À01-10% of borax and 0À01-5% of octadecylamine based on the urea.</p> |
