EP 2144989 A1 20100120 - PROCESS FOR THE PREPARATION OF COATED SODIUM PERCARBONATE
Title (en)
PROCESS FOR THE PREPARATION OF COATED SODIUM PERCARBONATE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON BESCHICHTETEM NATRIUMPERCARBONAT
Title (fr)
PROCÉDÉ POUR LA PRÉPARATION DE PERCARBONATE DE SODIUM ENROBÉ
Publication
Application
Priority
- EP 2008055253 W 20080429
- EP 07107377 A 20070502
- EP 08749854 A 20080429
Abstract (en)
[origin: WO2008135461A1] A process for the preparation of coated sodium percarbonate containing particles, comprising (a) a manufacturing step of sodium percarbonate containing core particles, comprising the crystallisation of sodium percarbonate from aqueous solution and the separation from aqueous solution, (b) an at least partial drying step of the sodium percarbonate containing core particles, (c) a coating step comprising the application of a base coating on the so obtained core particles with one or more sodium percarbonate containing or generating solutions and/or suspensions, and optionally one or more additives, and (d) a drying step of the coated sodium percarbonate containing particles, wherein step (c) and/or (d), and optionally (b), are carried out in a fluid bed reactor and the global molar ratio between hydrogen peroxide and sodium carbonate in the sodium percarbonate containing or generating solutions and suspensions is below 1,35 or above 1,65.
IPC 8 full level
C01B 15/00 (2006.01); C11D 3/39 (2006.01); C11D 3/395 (2006.01)
CPC (source: EP)
C01B 15/106 (2013.01); C11D 3/3942 (2013.01); C11D 17/0039 (2013.01)
Citation (search report)
See references of WO 2008135461A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2008135461 A1 20081113; CN 101688161 A 20100331; CN 101688161 B 20120905; EP 2144989 A1 20100120
DOCDB simple family (application)
EP 2008055253 W 20080429; CN 200880023191 A 20080429; EP 08749854 A 20080429