Title:
顆粒状の被覆された過炭酸ナトリウムの製造法及び該製造法により得ることができる生成物
Document Type and Number:
Japanese Patent JP2005500968
Kind Code:
A
Abstract:
The invention relates to a process for the preparation of coated granular sodium percarbonate having a low TAM value. The preparation is carried out by fluidized-bed spray granulation at a temperature TG in the range from 45 to 75° C., and the coating is effected by the spray application of an aqueous solution containing at least one coating component in a fluidized bed at a temperature TU in the range from 35 to 100° C. According to the invention, a) after the fluidized-bed spray granulation but before the coating, drying is carried out at TNT of greater than TG, or b) the fluidized-bed granulation is carried out in at least two steps at TG1, TG2 . . . TGn, TG2 or TGn being higher than TG1, and drying being unnecessary if 2/3 of the granulate have been formed at TG1, or c) drying takes place not after the granulation but after the coating, at TUNT, TUNT being at least 20° C. higher than TG.
Inventors:
Halalto jakop
Waldemar Hesberger
Jürgen Latich
Ralph Overdik
Waldemar Hesberger
Jürgen Latich
Ralph Overdik
Application Number:
JP2003523143A
Publication Date:
January 13, 2005
Filing Date:
July 04, 2002
Export Citation:
Assignee:
Degussa AG
International Classes:
C01B15/10; C11D3/39; (IPC1-7): C01B15/10
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel