EP 0139547 B1 19870401 - GRANULAR DETERGENTS WITH A LOW PHOSPHATE CONTENT, AND METHOD FOR THEIR PREPARATION
Title (en)
GRANULAR DETERGENTS WITH A LOW PHOSPHATE CONTENT, AND METHOD FOR THEIR PREPARATION
Publication
Application
Priority
FR 8315306 A 19830927
Abstract (en)
[origin: EP0139547A1] 1. A method of preparing granular detergents with a low phosphate content, that is with a content of between 10% and 25% of sodium tripolyphosphate and a combined content of sodium orthophosphate and of sodium pyrophosphate of less than about 2% by weight and preferably less than about 1% by weight, and containing non-ionic surface active agents amounting to about 10% by weight of the whole composition, the method comprising forming an essentially hot aqueous suspension with thermostable constituents, drying the suspension in an atomising tower, mixing the atomised base with sodium tripolyphosphate and the other thermosensitive constituents, and then agglomerating the solid components by pulverisation with the assistance of a non-ionic surface active agent until there are obtained essentially homogeneous granules with little tendency to glutination, and the method being characterised in that the whole of the sodium tripolyphosphate is not subjected to the phases of hot aqueous suspension or atomisation, and in that, during the agglomeration phase, the temperature of the non-ionic surface active agent is between 25 degrees C and 80 degrees C, and preferably between 50 degrees C and 70 degrees C.
IPC 1-7
IPC 8 full level
C11D 3/06 (2006.01); C11D 11/02 (2006.01); C11D 17/00 (2006.01)
CPC (source: EP)
C11D 11/02 (2013.01); C11D 17/0039 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0139547 A1 19850502; EP 0139547 B1 19870401; AT E26300 T1 19870415; DE 139547 T1 19850829; DE 3462923 D1 19870507; ES 534997 A0 19850416; ES 8504921 A1 19850416; FR 2552446 A1 19850329; FR 2552446 B1 19851220
DOCDB simple family (application)
EP 84401588 A 19840727; AT 84401588 T 19840727; DE 3462923 T 19840727; DE 84401588 T 19840727; ES 534997 A 19840809; FR 8315306 A 19830927