发明授权
- 专利标题： Aqueous solution of chromium salt and method for producing same
- 专利标题（中）： 铬盐水溶液及其制备方法
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申请号： US12646048申请日： 2009-12-23
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公开(公告)号： US08083842B2公开(公告)日： 2011-12-27
- 发明人: Hideki Kotaki , Tomohiro Banda , Takashi Hara , Nobuo Takagi
- 申请人： Hideki Kotaki , Tomohiro Banda , Takashi Hara , Nobuo Takagi
- 申请人地址： JP Tokyo
- 专利权人： Nippon Chemical Industrial Co., Ltd.
- 当前专利权人： Nippon Chemical Industrial Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Smith Patent Office
- 优先权： JP2003-412589 20031210; JP2004-132079 20040427; JP2004-142871 20040512; JP2004-259046 20040906
- 主分类号： C23C22/05
- IPC分类号： C23C22/05 ; C23C30/00 ; C23F11/00 ; C23F11/12 ; C01B9/02
摘要：
Disclosed is an aqueous solution of a chromium salt, in which the oxalic acid content is 8% by weight or less relative to chromium. In the aqueous solution of the chromium salt, the total organic carbon content is 4% by weight or less relative to chromium. The chromium salt is preferably a chromium chloride, a chromium phosphate, or a chromium nitrate. The chromium chloride preferably contains a basic chromium chloride represented by the composition formula Cr(OH)xCly (wherein 0
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