EP 1387881 A1 20040211 - GRANULAR CARBONATE AND SILICATE-CONTAINING COMPOSITIONS
Title (en)
GRANULAR CARBONATE AND SILICATE-CONTAINING COMPOSITIONS
Title (de)
GRANULÄRE CARBONAT- UND SILIKATHALTIGEN ZUSAMMENZETZUNGEN
Title (fr)
COMPOSITIONS GRANULAIRES CONTENANT DU CARBONATE ET DU SILICATE
Publication
Application
Priority
- GB 0201892 W 20020423
- GB 0111043 A 20010508
Abstract (en)
[origin: WO02090487A1] A composition for use as a builder in detergent compositions comprises a granular material containing an alkali metal silicate and an alkali metal carbonate characterised in that the alkali metal silicate has a molar ratio, SiO2 to M2O, where M is an alkali metal, in the range 2.4 : 1 to 3.0 : 1, the amount of silicate in the granules, calculated as SiO2, is at least 30 per cent by weight, the amount of alkali metal carbonate in the granules, expressed as anhydrous material, is less than 35 per cent by weight and the amount of water in the granules is less than 25 per cent by weight. A preferred process for manufacture of such compositions comprises the steps of (a) preparing an aqueous mixture of an alkali metal silicate and an alkali metal carbonate, (b) spray-drying said aqueous mixture and (c) compacting the spray-dried powder thereby produced to form granules of said composition. In an alternative process the aqueous mixture of silicate and carbonate is dried and optionally granulated in a drum containing a multiplicy of rotating arms and into which a heated gas is introduced.
IPC 1-7
IPC 8 full level
C11D 3/08 (2006.01); C11D 3/10 (2006.01); C11D 3/12 (2006.01); C11D 7/12 (2006.01); C11D 7/14 (2006.01); C11D 11/02 (2006.01); C11D 17/06 (2006.01)
CPC (source: EP)
C11D 3/08 (2013.01); C11D 3/10 (2013.01); C11D 7/12 (2013.01); C11D 7/14 (2013.01); C11D 11/02 (2013.01); C11D 17/06 (2013.01)
Citation (search report)
See references of WO 02090487A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 02090487 A1 20021114; BR 0209504 A 20040713; EP 1387881 A1 20040211; GB 0111043 D0 20010627
DOCDB simple family (application)
GB 0201892 W 20020423; BR 0209504 A 20020423; EP 02716953 A 20020423; GB 0111043 A 20010508