| 摘要 |
<p>The invention relates to the production of prills of ADN. Homogeneous, pore-free prills are produced by making droplets of ADN solidify at low pressure, preferably under vacuum below 25 mm Hg. The prilling can be carried out in a prill tower or in a liquid nonpolar medium. The nonpolar medium may consist of a plasticiser or a plasticiser with a polymer added for adjustment of the viscosity of the medium. Ultrasonic energy can be supplied to the medium during prilling to obtain an intense dispersion of molten ADN in the medium and, thus, small prills. ADN prills having a particle size below 40 νm can be produced in this way. The invention also concerns a polymodal mixture of ADN prills comprising prills having a particle size below 40 νm produced according to the method.</p> |
