Unilever Patent Holdings B.v.

Crosfield Limited

Lever Brothers Company, Division of Conopco, Inc.

Theo J Osinga

Peter Willem Appel

Graham T Brown

Carolyn Angela Lanceley

Andrew T Steel

Michael J Parkingston

Joseph P Theunissen

Jelles Vincent Boskamp

Francois Delwel

Andrew P Chapple

Edwin Leo Lempers

Keith R Cockett

Christophe Michel Joyeux

Fredericus Cornelis Dobbe

Theodorus Johannes Arts

Theodorus Johannes Cornelius Arts

Ian Maurice Howarth

Jack M Vrancken

A modified aluminosilicate in powder form comprising alkali metal silicate deposited onto aluminosilicate of the zeolite P type particles presents increased Liquid Carrying Capacity.

Modified aluminosilicate

Suspension, having a high storage stability, comprising an aqueous silicate solution and a filler material, wherein the silicate solution has a silicate content of at least 20% by weight, the filler material has an average particle size of 0.8 to 15 &mgr;m and a specific weight of below 2.75 Kg/l.

Suspensions with high storage stability, comprising an aqueous silicate solution and a filler material

Granules based on silicate antiredeposition agent mixtures and method

In order to enhance the stability of sodium percarbonate bleach in particulate detergent compositions, crystalline aluminosilicate and a water-soluble alkali metal silicate in an amount of from 1-20% by weight based on the aluminosilicate are included in the non-spray dried base powder. In order to obtain the stabilizing effect, the crystalline aluminosilicate comprises zeolite MAP or the alkali metal silicate is homogeneously dispersed with respect to the aluminosilicate.

Particulate aluminosilicate-built detergent compositions comprising

Aluminosilicates in the form of P type zeolites are used as detergency builders and have a silicon to aluminium ratio not greater than 1.33, preferably above 0.9. These zeolites will usually have a calcium binding capacity of at least 150 mg CaO per gram of anhydrous aluminosilicate. A preferred form of the zeolite P has a silicon to aluminium ratio up to 1.15, and preferably above 0.9, with a tetragonally distorted cubic crystal structure. A process of the preparation of these zeolite P builders is described.

Aluminosilicates and detergent composition

The characteristics of compacted sodium silicate, in particular the bulk density, are improved by heating the material at an elevated temperature in an agitated bed. Bulk density in the region of 1 kg/liter can be obtained.

Silicate products

Type B aluminosilicates with low Si:Al ratio for detergent use

Alkali metal silicate solutions are formed into granules in a single stage. The heated solution is sprayed into a heated drum having a multiplicity of arms fixed to a rapid by rotating central shaft. A gas, preferably air, heated to 150.degree. C. to 200.degree. C. is also introduced with the silicate solution and a granulated product is obtained from the other end of the drum.

Granular alkali metal silicate production

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Cadier en Keer, Netherlands

Theo J Osinga