C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 15/043 (2006.01) A01N 59/00 (2006.01) C01B 15/10 (2006.01) C11D 3/37 (2006.01) C11D 3/39 (2006.01) C11D 3/395 (2006.01) C11D 17/00 (2006.01)
Patent
CA 2272743
The invention relates to a stabilized sodium carbonate peroxyhydrate (SCPH) comprising granules of sodium carbonate peroxyhydrate made of non-crystalline sodium carbonate peroxyhydrate and having a coating layer thereon, wherein said coating layer comprises sodium sulphate and a chelating agent selected from the group consisting of: (a) (poly)aminophosphonic acid derivatives, (b) (poly)aminopolycarboxylic acid derivatives, and (c) N-bis- or tris-[(1,2-dicarboxy-ethoxy)ethyl]amine derivatives. The stabilized SCPH can be prepared by fluidized bed coating. The coated SCPH has good stability when used in detergent containing zeolites.
Korvela Timo
Renvall Ilkka
Kemira Chemicals Oy
Oyen Wiggs Green & Mutala Llp
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