METHOD TO PROCESS TITANIUM-SILICON-CONTAINING STOCK Russian patent published in 2009 - IPC C22B34/12 C22B1/02 C22B3/04 

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy and can be used for desiliconization of mineral stock, production of artificial rutile, silicon dioxide and modification of its surface. Proposed method comprises initial stock fluorination by fluorine-containing ammonium salt to produce fluorinated mass containing mix of silicon and titanium compounds. Fluorination over, said mix is separated to produce commercial products based on titanium and silicon dioxides. Initial stock is fluorinated at 110 to 195°C, or without heating. Aforesaid mix is separated by sublimation of ammonium silicon fluoride at 305 to 450°C, or by water leaching.

EFFECT: reduced costs and higher quality of end products.

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