Invention Grant
- Patent Title: Silica gel comprising guanidine carbonate
- Patent Title (中): 含有碳酸胍的硅胶
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Application No.: US10520574Application Date: 2003-07-07
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Publication No.: US08299131B2Publication Date: 2012-10-30
- Inventor: Lothar Puppe , Dietrich Pantke
- Applicant: Lothar Puppe , Dietrich Pantke
- Applicant Address: NL
- Assignee: Akzo Nobel Chemicals International B.V.
- Current Assignee: Akzo Nobel Chemicals International B.V.
- Current Assignee Address: NL
- Agency: Connolly Bove Lodge & Hutz LLP
- Priority: DE10230982 20020710
- International Application: PCT/EP03/07235 WO 20030707
- International Announcement: WO2004/007367 WO 20040122
- Main IPC: C01B33/12
- IPC: C01B33/12 ; C01B33/141
Abstract:
A process of preparing a silica sol is described. The process involves reacting a fresh sol with guanidine carbonate. The reaction may be conducted in the presence of a base (e. g. , sodium water glass), and at a pH of from 8 to 12. The process of the present invention may also include concentrating steps. The silica sol prepared by the method of the present invention has a BET surface area of greater than or equal to 100 m2/g, and contains from 0.05 to 15% by weight of gaunidinium ions, based on the total weight of the silica gel.
Public/Granted literature
- US20060013754A1 Silica gel comprising guanidine carbonate Public/Granted day:2006-01-19
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