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1. 发明申请

WO1998014401A1 VALUE IMPROVEMENT OF CLAYS 审中-公开
标题翻译：粘土价值改进
公开(公告)号：WO1998014401A1
公开(公告)日：1998-04-09
申请号：PCT/AU1997000636
申请日：1997-09-25
申请人： MCLAUGHLIN GEOSURVEYS PTY. LIMITED , MCLAUGHLIN, Robert, James
发明人： MCLAUGHLIN GEOSURVEYS PTY. LIMITED
IPC分类号： C01F07/46
CPC分类号： C01F7/765 , C01B33/187 , C01F7/20 , C01F7/26 , C01P2002/84 , C01P2006/80
摘要： A process which allows the conversion of clay minerals of the kalonite group, to a relatively pure form of alumina and silica respectively comprising the steps of: (a) heating the kaolinite group minerals to greater than 500 DEG C, which causes dehydroxylation of the crystallographic lattice and formation of an intermediate meta-kaolin; (b) reacting the intermediate with only one of a selection of reagents including acids, alkalines or metalliferous compounds followed by heating of the mixture to form an aluminium salt in solution and residue of silica; (c) separation of the aluminium salt solution from the residue of silica by filtration and further treatment of the silica residue to produce a relatively pure form of fine particled silica; (d) formation of an alum by addition of ammonium sulphate in solution to the aluminium salt solution and further treatment of the alum to produce a relatively pure form of aluminium hydroxide.
摘要翻译：允许将钙蓝矿的粘土矿物转化成相对纯的形式的氧化铝和二氧化硅的方法，分别包括以下步骤：（a）将高岭石矿物质加热到大于500℃，这导致晶体学的脱羟基化中间体高岭土的晶格和形成; （b）使中间体与选择的试剂（包括酸，碱或含金属化合物）中的一种反应，然后加热混合物以在溶液中形成铝盐，并将二氧化硅残余物反应; （c）通过过滤将铝盐溶液与二氧化硅残余物分离，并进一步处理二氧化硅残余物以产生相对纯的形式的细颗粒二氧化硅; （d）通过在铝盐溶液中加入硫酸铵形成明矾，并进一步处理明矾以产生相对纯的形式的氢氧化铝。

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