发明授权
- 专利标题： Basic chromium aluminum sulfates and their preparation
- 专利标题（中）： 碱性硫酸铝及其制备方法
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申请号： US589769申请日： 1984-03-15
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公开(公告)号： US4629616A公开(公告)日： 1986-12-16
- 发明人: Werner Ostertag , Henning Wienand , Dietrich Lach , Erwin Hahn
- 申请人： Werner Ostertag , Henning Wienand , Dietrich Lach , Erwin Hahn
- 申请人地址： DEX
- 专利权人： BASF Aktiengesellschaft
- 当前专利权人： BASF Aktiengesellschaft
- 当前专利权人地址： DEX
- 优先权： DEX3310270 19830322
- 主分类号： C01G37/00
- IPC分类号： C01G37/00 ; C14C3/04 ; C01B17/96 ; C01G37/14 ; C14C9/00
摘要：
The invention relates to basic chromium aluminum sulfates which are soluble in cold water and are of the general formulaCr.sub.x Al.sub.2-x (OH).sub.2 y. (SO.sub.4).sub.3-y.n H.sub.2 Owhere x is from 0.1 to 1.9, y is from 0.01 to 2 and n is from 4 to 24, and a process for the preparation thereof. The process comprises reacting chromium (III)--containing waste sulfuric acid having a water content of 20-50% by weight with aluminum oxide and/or aluminum oxide hydroxide and/or aluminum hydroxide at a temperature of 100.degree. to 200.degree. C. The molten product is converted to droplet form and allowed to solidify in free fall.
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