Invention Grant
- Patent Title: Production of high purity precipitated calcium carbonate
-
Application No.: US14628518Application Date: 2015-02-23
-
Publication No.: US09725330B2Publication Date: 2017-08-08
- Inventor: Bahman Tavakkoli , Jörg Sötemann , Michael Pohl , Thomas Schmölzer
- Applicant: Omya International AG
- Applicant Address: CH Oftringen
- Assignee: Omya International AG
- Current Assignee: Omya International AG
- Current Assignee Address: CH Oftringen
- Agency: Amster, Rothstein & Ebenstein LLP
- Priority: EP10188840 20101026
- Main IPC: C01F11/18
- IPC: C01F11/18 ; C09C1/02 ; D21H17/67

Abstract:
The present invention relates to a process for the preparation of precipitated calcium carbonate comprising the steps of a) providing and calcining calcium carbonate comprising material; b) slaking the reaction product obtained from step a) with an aqueous ammonium chloride solution; c) separating insoluble components from the calcium chloride solution obtained from step b); d) carbonating the calcium chloride solution obtained from step c); e) separating the precipitated calcium carbonate obtained from step d); the precipitated calcium carbonate obtained by this process, as well as uses thereof.
Public/Granted literature
- US20150183654A1 PRODUCTION OF HIGH PURITY PRECIPITATED CALCIUM CARBONATE Public/Granted day:2015-07-02
Information query
IPC分类: