发明授权
US07468169B2 Process for producing calcium trisulfoaluminate and apparatus for use in said process
失效
用于生产三硫铝酸钙的方法和用于所述方法的装置
- 专利标题: Process for producing calcium trisulfoaluminate and apparatus for use in said process
- 专利标题(中): 用于生产三硫铝酸钙的方法和用于所述方法的装置
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申请号: US11702017申请日: 2007-02-02
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公开(公告)号: US07468169B2公开(公告)日: 2008-12-23
- 发明人: Takayuki Kishida , Yuichi Ogawa , Yoshiki Kojima , Takuya Ono , Kenichi Mitsui , Tetsuya Hirabayashi , Masaki Nakano
- 申请人: Takayuki Kishida , Yuichi Ogawa , Yoshiki Kojima , Takuya Ono , Kenichi Mitsui , Tetsuya Hirabayashi , Masaki Nakano
- 申请人地址: JP Tokyo
- 专利权人: OJI Paper Co., Ltd.
- 当前专利权人: OJI Paper Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Alston & Bird LLP
- 优先权: JP2004-227553 20040804; JP2005-123689 20050421
- 主分类号: C01F11/00
- IPC分类号: C01F11/00
摘要:
This invention provides a production process, which can stably produce high-quality satin white (calcium trisulfoaluminate) having very small and homogeneous particulate shapes suitable for incorporation into coated paper for printing, and an apparatus for use in said process. In this process for producing calcium trisulfoaluminate, a calcium hydroxide suspension (A) is reacted with an aqueous aluminum sulfate solution (B) to produce calcium trisulfoaluminate (C). The aqueous aluminum sulfate solution (B) is added in plurality of stages to the calcium hydroxide suspension (A). At least any one stage of the plurality of stages addition, addition of the aqueous aluminum sulfate solution (B) to the calcium hydroxide suspension (A) is carried out in such a manner that the aqueous aluminum sulfate solution (B) is continuously added to the calcium hydroxide suspension (A) being continuously transferred.