Process for the production of powdery washing agents by spray-drying

Claim 1

In the process for the preparation of a powdery, trickleable washing and cleansing agent composition which comprises spray-drying an aqueous slurry of the individual constituents of a washing and cleansing agent composition including builders, and surface-active compounds and recovering said powdery, trickleable washing and cleansing agent composition, the improvement consisting of employing a previously prepared aqueous suspension having a pH of between 7 and 12 of water-insoluble, calcium-binding aluminosilicates with an improved stability against settling consisting essentially of (A) from 20% to 50% by weight on the anhydrous basis of at least one crystalline, finely divided, water-insoluble silicate compound having a calcium-binding power of at least 50 mg CaO/gm of anhydrous active substance when measured at 22° C. by the Calcium Binding Power Test Method set out in the specification, and a primary particle size of from 0.1μ to 100μ and having the formula, combined water not shown (M.sub.2 O).sub.x.Me.sub.2 O.sub.3.(SiO.sub.2).sub.y where M is a member selected from the group consisting of sodium and potassium, x is a number of from 0.7 to 1.5, Me is aluminum or boron, and y is a number from 0.8 to 6, and (B) from 0.5% to 6% by weight of at least one organic dispersing agent selected from the group consisting of the free acids and alkali-metal salts of (1) an organic, macromolecular polymer with carboxyl and/or hydroxy groups, (2) an organic phosphonic acid having at least one further acid group selected from the group consisting of phosphonic acid and carboxyl, (3) an alkyl acid phosphate emulsifier having from 3 to 20 carbon atoms in the alkyl, (4) a non-ionic surface-active compound having a turbidity point in aqueous butoxyethoxyethanol according to DIN 53917 of below 90° C. and a turbidity point of a 1% solution in water of below room temperature, and (5) an anionic surface-active sulfonate, and (C) the remainder up to 100%, water, said aqueous suspension being capable of being pumped after 24 hours of standing, as one of the ingredients in the preparation of said aqueous slurry.