Preparation of titanium dioxide pigment having the crystal structure of anatase
Abstract
Abstract 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.
Inventors
- 👤 John J Libera
- 👤 Eckard J Puetz
Bibliographic Details
Claims Analysis
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