Invention Grant
- Patent Title: Aluminum hydroxide aggregated particles producing vessel
- Patent Title (中): 氢氧化铝凝集颗粒生产容器
-
Application No.: US10289429Application Date: 2002-11-07
-
Publication No.: US07704465B2Publication Date: 2010-04-27
- Inventor: Hisakatsu Kato , Masashi Wada , Naoyuki Eguchi , Hirofumi Sasaki
- Applicant: Hisakatsu Kato , Masashi Wada , Naoyuki Eguchi , Hirofumi Sasaki
- Applicant Address: JP Osaka
- Assignee: Sumitomo Chemical Company, Limited
- Current Assignee: Sumitomo Chemical Company, Limited
- Current Assignee Address: JP Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP.
- Priority: JP2001-342358 20011107; JP2001-342359 20011107
- Main IPC: B01J19/18
- IPC: B01J19/18

Abstract:
Aluminum hydroxide aggregated particles which have an average particle diameter of not less than 40 μm, an average particle diameter as determined after pressing at 1,000 kg/cm2 of not more than 35 μm, and an L value of slurry obtained by mixing 20 ml of glycerol and 10 g of the aluminum hydroxide aggregated particles of not more than 69, are obtained by a process comprising the steps of: (a) feeding a supersaturated aqueous sodium aluminate solution to a vessel, (b) adding aluminum hydroxide seeds to the supersaturated aqueous sodium aluminate solution, (c) stirring the seed-added solution in the vessel while continuously feeding an additional supersaturated aqueous sodium aluminate solution into the vessel to hydrolyze the supersaturated aqueous sodium aluminate solution, (d) separating the aluminum hydroxide aggregated particles from the aqueous sodium aluminate solution, and (e) continuously discharging the aqueous sodium aluminate solution out of the vessel.
Public/Granted literature
Information query