Pigment production based on rutile has less environmental challenges than pigment production based on ilmenite. The chloride process, using a rutile feed, generates about 0.2 ton of waste per ton of TiO2 product. For the sulphate process, using ilmenite the waste volume is 3.5 tons, and for syntetic rutile using ilmenite the waste volume is 0.7 ton. Direct chlorination of ilmenite generates 1.2 tons of waste per ton of TiO2.
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Ilmenite and Titanium |