Urea fertilizer containing central volatilization inhibitor particles to reduce release of ammonia and processes for making same

摘要

A urea fertilizer having reduced ammonia volatilization upon application to soil including a central particle having an outer surface and comprising ammonia volatilization inhibiting compounds containing one or more of boron and iodine, and a coating of urea on the outer surface of the central particle, and further a process of making the fertilizer including the steps of: granulating ammonia volatilization inhibiting compounds containing one or more of boron and iodine, with a binder to produce volatilization inhibitor particles; screening the inhibitor particles to a preselected particle size; spraying melted urea onto the surface of the inhibitor particles to produce a coating on the inhibitor particles; granulating the coated inhibitor particles with sprayed melted urea to produce granules of urea coated central volatilization particles; and cooling the granules.

主权项

1. A urea fertilizer having reduced ammonia volatilization upon application to soil comprising:
a central particle having an outer surface and comprising ammonia volatilization inhibiting compounds containing one or more of boron and iodine, wherein the ammonia volatilization inhibiting compounds are selected from the group consisting of disinfectants, cationic surfactants, weak acids and sulfonamides, and a coating of urea on the outer surface of the central particle.