| 摘要 |
<p>Na tripolyphosphate compositions very rapidly hexahydrated, e.g., in water, and well suited for detergency applications, are comprised of a mass of sodium tripolyphosphate particulates prehydrated with a plurality of hexahydrated sodium tripolyphosphate crystals homogeneously distributed therethrough, (i) said particulates displaying a ratio of phase I crystalline form content to the total content of the phase I plus phase II crystalline forms of at least 50%, (ii) a homogeneous distribution of phase I crystalline form throughout both said particulates and said mass, (iii) a particle size distribution such that the average Rosen-Rambler-Bennett particle diameter ranges from 130 to 250 mu , with the maximum amount by weight of particles larger than 630 mu in diameter being about 5% and the maximum amount by weight of particles smaller than 25 mu in diameter being about 20%, (iv) a content in water ranging from about 0.4 to 4% by weight, said water content essentially consisting of the bound water constituting said hexahydrated sodium tripolyphosphate crystals, and (v) with each crystal population of particle sizes being homogeneously distributed throughout said mass.</p> |
