EP 1451283 A1 20040901 - METHOD FOR PRODUCING BLEACH ACTIVATOR GRANULES
Title (en)
METHOD FOR PRODUCING BLEACH ACTIVATOR GRANULES
Title (de)
VERFAHREN ZUR HERSTELLUNG VON BLEICHAKTIVATORGRANULATEN
Title (fr)
PROCEDE DE PRODUCTION DE GRANULES ACTIVATEURS DE BLANCHIMENT
Publication
Application
Priority
- DE 10159386 A 20011204
- EP 0213126 W 20021122
Abstract (en)
[origin: WO03048289A1] The aim of the invention is to improve a method for producing bleach activator granules whereby obtaining granules that are more stable in storage and more pourable. This is achieved, in essence, by the following steps: a) preparing an aqueous solution containing cationic nitrile and, optionally, alkali cumene sulfonate; b) optionally adjusting the solution to an acid pH value; c) atomizing and drying the solution in a fluidized bed apparatus; d) optionally dusting off the hereby obtained primary granules in the fluidized bed; e) hardening the optionally dusted off primary granules by subsequently spraying them with an aqueous hardening solution that contains, as a hardening active substance, polymeric polycarboxylate and/or alkali phosphonate while simultaneously drying in the same fluidized bed apparatus or, optionally, in a second fluidized bed apparatus connected downstream therefrom; f) removing the granules from the fluidized bed apparatus and optionally separating the granules into product granules and coarse/fine granules, particularly by sieving; g) optionally returning the fine granules and/or comminuted coarse granules into the fluidized bed in step c); h) optionally returning fine granules and/or ground up coarse granules into dusting off step d).
IPC 1-7
IPC 8 full level
C11D 11/00 (2006.01); C11D 3/26 (2006.01); C11D 3/37 (2006.01); C11D 3/39 (2006.01); C11D 3/395 (2006.01); C11D 7/20 (2006.01); C11D 7/32 (2006.01); C11D 7/34 (2006.01); C11D 7/36 (2006.01); C11D 7/54 (2006.01); C11D 11/02 (2006.01); C11D 17/06 (2006.01)
CPC (source: EP US)
C11D 3/3925 (2013.01 - EP US); C11D 11/02 (2013.01 - EP US)
Citation (search report)
See references of WO 03048289A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03048289 A1 20030612; AT E350449 T1 20070115; AU 2002352097 A1 20030617; DE 10159386 A1 20030612; DE 50209196 D1 20070215; EP 1451283 A1 20040901; EP 1451283 B1 20070103; ES 2278990 T3 20070816; JP 2005511822 A 20050428; US 2004248755 A1 20041209; US 7064100 B2 20060620
DOCDB simple family (application)
EP 0213126 W 20021122; AT 02787771 T 20021122; AU 2002352097 A 20021122; DE 10159386 A 20011204; DE 50209196 T 20021122; EP 02787771 A 20021122; ES 02787771 T 20021122; JP 2003549469 A 20021122; US 86134204 A 20040604