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公开(公告)号：US3660021A
公开(公告)日：1972-05-02
申请号：US3660021D
申请日：1970-09-29
申请人： NL INDUSTRIES INC
CPC分类号： C01B33/22 , C01B33/24 , C01P2006/19 , C01P2006/60 , C09C1/28
摘要： A new type of finely divided calcium silicate has been produced by reacting calcium sulfate with sodium silicate an amounts to form theoretically a composition containing from about 0.7 to about 4.0 moles of SiO2 for each mole of CaO. The by-product sodium sulfate is removed from the calcium silicate by washing.
摘要翻译： 通过使硫酸钙与硅酸钠反应生成一种新型细碎的硅酸钙，其用量在理论上形成每摩尔CaO含有约0.7至约4.0摩尔SiO 2的组合物。 通过洗涤从硅酸钙中除去副产物硫酸钠。
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2.发明授权Preparation of titanium dioxide pigment having the crystal structure of anatase 失效具有晶状体晶体结构的二氧化钛颜料的制备
公开(公告)号：US3625650A
公开(公告)日：1971-12-07
申请号：US3625650D
申请日：1969-08-27
申请人： NL INDUSTRIES INC
发明人： LIBERA JOHN J , PUETZ ECKARD J
IPC分类号： C01G23/053 , C01G23/04 , C01G23/06 , C01G23/08
CPC分类号： C01G23/0532 , C01P2006/60
摘要： THIS INVENTION RELATES IN GENERAL TO A PROCESS FOR PREPARING A HIGH QUALITY TITANIUM DIOXIDE PIGMENT IN WHICH THE TITANIUM DIOXIDE IS IN THE ANATASE CRYSTAL FORM. THE PROCESS COMPRISES HYDROLYZING IN A PARTICULAR MANNER THE TITANIUM VALUES FROM A TITANIUM SULFATE-FERROUS SULFATE SOLUTION IN WHICH THE CONCENTRATION OF TITANIUM IS FROM 80 TO 180 G.P.L. CALCULATED AS TIO2 AND TREATING AND CALCINING THE HYDRATE SO FORMED TO PRODUCE A HIGH GRADE ANATASE TIO2 PIGMENT. USING THE HYDROLYSIS PROCESS OF THE INSTANT INVENTION, A HIGH GRADE ANATASE TITANIUM DIOXIDE PIGMENT MAY BE PRODUCED FROM A TITANIUM SULFATE-FERROUS SULFATE SOLUTION WITHOUT UTILIZING THE CONVENTIONAL CRYSTALLIZATION STEP FOR REMOVING MOST OF THE IRON VALUES NOR THE CONCENTRATION STEP FOR INCREASING THE TITANIUM CONTENT IN THE LIQUOR TO AT LEAST 200G.P.L. TIO2.
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公开(公告)号：US3615204A
公开(公告)日：1971-10-26
申请号：US3615204D
申请日：1969-09-22
申请人： NL INDUSTRIES INC
发明人： LIBERA JOHN J , PUETZ ECKARD J
IPC分类号： C01G23/053 , C09C1/36 , C01G23/06 , C01G23/08
CPC分类号： C01G23/0534 , C01P2006/60 , C09C1/363
摘要： This invention relates in general to a process for preparing a high-quality titanium dioxide pigment in which the titanium dioxide is in the anatase crystal form. The process comprises hydrolyzing in a particular manner the titanium values from a titanium sulfate-ferrous sulfate solution in which the concentration of titanium is from 80 to 180 g.p.l. TiO2 and the FeSO4/TiO2 ratio is from 2.20 to 2.75 and treating and calcining the hydrate so formed to produce a high-grade anatase TiO2 pigment. Using the hydrolysis process of the instant invention, a high-grade anatase titanium dioxide pigment may be produced from a solution which does not require the conventional crystallization step to remove most of the iron values and the concentration step to increase the titanium content in the liquor to at least 200 g.p.l. TiO2.
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