| 摘要 |
<p>THE INVENTION RELATES TO A METHOD FOR PRODUCING A SPRAY POWDER CONTAINING ONE OR MORE GLYCINE-N, N-DIACETIC ACID DERIVATIVES OF THE GENERAL FORMULA (I) MOOC-CHR-N(CH2COOM)2 (I), R STANDING FOR C1-12 ALKYL AND M STANDING FOR ALKALI METAL, STARTING FROM AN AQUEOUS SOLUTION CONTAINING THE ONE OR MORE GLYCINE-N, N-DIACETIC ACID DERIVATIVES, WHICH IS SPRAY-DRIED BY ADDING AIR, CHARACTERIZED IN THAT - THE AQUEOUS SOLUTION CONTAINS THE ONE OR MORE GLYCINE-N, N-DIACETIC ACID DERIVATIVES AT A FRACTION OF ? 84 WT.% RELATIVE TO THE TOTAL WEIGHT OF THE DRY MASS, AND THAT - THE SPRAY DRYING OCCURS IN A DRYING APPARATUS, TO WHICH THE AQUEOUS SOLUTION AND THE AIR ARE FED IN PARALLEL FLOW, WITH A TEMPERATURE GRADIENT BETWEEN THE AQUEOUS SOLUTION AND THE AIR IN THE RANGE OF 70 TO 350 °C, AND THAT - IN THE DRYING APPARATUS, THE AQUEOUS SOLUTION IS ATOMIZED INTO FINE LIQUID DROPLETS BY BEING GUIDED ONTO ONE OR MORE DISKS, WHICH ROTATE AT A CIRCUMFERENTIAL SPEED OF ? 100 M/S, OR BY BEING COMPRESSED BY MEANS OF A PUMP TO A PRESSURE OF ? 20 BAR ABSOLUTE AND INTRODUCED INTO THE DRYING APPARATUS AT THIS PRESSURE BY MEANS OF ONE OR MORE NOZZLES.</p> |
