NEUE, MIT SPURENELEMENTEN DOTIERTE KATIONENAUSTAUSCHENDE ALUMINIUMSILIKATE UND VERFAHREN ZU DEREN HERSTELLUNG

摘要

The finely divided, water-insoluble Al silicates, contg. combined water, have Ca bonding capacity >=50 mgCaO/g active substance and formula xCat2/nO. Al2O3.ySiO2 (I) (where Cat is a Ca-exchangeable cation having valency n; x is 0.7-1.5; y is 0.8-6 esp. 1.3-4). Al is replaced by >=1 of trace elements Sc, La, Ga, In or Cr, in trivalent state, in a way such that trace element content is 1-5000 (5-2000) ppm, w.r.t. anhydrous active substance. (I) replace phosphate builders in detergent-, cleansing-or dish-washing compsns. Presence of trace elements ecological research to be carried out w.r.t. their remaining presence in waste waters and sediments. In an example, In-doped crystalline Na Al silicate had compsn. 0.9Na2O 1 Al2O3.1. 1.93 SiO2. 4.3 H2O. It was prepd by stirring a doped Na silicate soln. contg. 320 ppm In into an aluminate soln.