Invention Grant
- Patent Title: Process for the preparation of a powder comprising one or more complexing agent salts
- Patent Title (中): 制备包含一种或多种络合剂盐的粉末的方法
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Application No.: US13501390Application Date: 2010-10-11
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Publication No.: US09540597B2Publication Date: 2017-01-10
- Inventor: Frank Mrzena , Ullrich Menge , Michael Schoenherr , Thomas Heidenfelder
- Applicant: Frank Mrzena , Ullrich Menge , Michael Schoenherr , Thomas Heidenfelder
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: EP09172810 20091012
- International Application: PCT/EP2010/065184 WO 20101011
- International Announcement: WO2011/045266 WO 20110421
- Main IPC: C11D11/02
- IPC: C11D11/02 ; C11D3/33 ; C11D17/06 ; C07C227/42 ; C07C229/24 ; C11D11/00
Abstract:
A process for the preparation of a powder comprising one or more complexing agent salts of the general formula comprises atomizing an aqueous solution comprising the one or more complexing agent salts in the presence of a crystalline fine dust of the same complexing agent salts and a drying step, wherein the concentration of the one or more complexing agent salt is from 10 to 80% by weight, based on the total weight of the aqueous solution, with an upper limit for the average particle diameter of the crystalline fine dust which is lower by at least a factor of 2 than the lower limit of the average particle diameter of the powder obtained after the process, and the fraction of the crystalline fine dust is from 0.1 to 20% by weight, based on the weight of the powder obtained after the process.
Public/Granted literature
- US20120202731A1 PROCESS FOR THE PREPARATION OF A POWDER COMPRISING ONE OR MORE COMPLEXING AGENT SALTS Public/Granted day:2012-08-09
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