发明授权
- 专利标题： Sulfate removal from alkali metal chlorate solutions
- 专利标题（中）： 从碱金属氯酸盐溶液中除去硫酸盐
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申请号： US781176申请日： 1985-09-30
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公开(公告)号： US4636376A公开(公告)日： 1987-01-13
- 发明人: Bernard A. Maloney , John E. Carbaugh
- 申请人： Bernard A. Maloney , John E. Carbaugh
- 申请人地址： PA Pittsburgh
- 专利权人： PPG Industries, Inc.
- 当前专利权人： PPG Industries, Inc.
- 当前专利权人地址： PA Pittsburgh
- 主分类号： C01B11/14
- IPC分类号： C01B11/14 ; C01F11/00
摘要：
A process for the removal of essentially chromium-free sulfate from a chromate and sulfate-containing chlorate liquor which includes mixing the chlorate liquor having a pH of between about 2.0 and 6.0 with a calcium-containing material at a temperature and for a time sufficient to form a sulfate-containing precipitate predominantly of glauberite, Na.sub.2 Ca(SO.sub.4).sub.2, and separating the substantially chromium-free glauberite from the chlorate liquor.