METHOD FOR PROCESSING LIQUID WASTES OF TITANIUM DIOXIDE PRODUCTION

FIELD: chemical industry.SUBSTANCE: invention can be used in chemical, metallurgical, electronic industry. For the processing of liquid wastes of titanium dioxide production, scandium is extracted from hydrolized sulfuric acid (HSA) on an extractant, consisting of a mixture of di-(2-ethylhexyl) phos...

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Hauptverfasser:	Kirillov Sergej Vladimirovich, Botalov Maksim Sergeevich, Smyshlyaev Denis Valerevich, Kirillov Evgenij Vladimirovich, Rychkov Vladimir Nikolaevich, Smirnov Aleksej Leonidovich, Bunkov Grigorij Mikhajlovich, Mashkovtsev Maksim Alekseevich
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS COMPOUNDS THEREOF FERROUS OR NON-FERROUS ALLOYS INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	FIELD: chemical industry.SUBSTANCE: invention can be used in chemical, metallurgical, electronic industry. For the processing of liquid wastes of titanium dioxide production, scandium is extracted from hydrolized sulfuric acid (HSA) on an extractant, consisting of a mixture of di-(2-ethylhexyl) phosphoric acid and tributyl phosphate (TBP) to produce a saturated extractant and extraction raffinate. Saturated extractant is washed with a solution of sulfuric acid and hydrogen peroxide. Scandium is reextracted with a solution consisting of a mixture of NaOH and NaCO, to obtain a scandium concentrate. Sulfuric acid from scandium extraction raffinate is sorbed on a low-basic polycondensation anionite to obtain a sorption mother liquid of sulfuric acid and a saturated low-basic polycondensation anionite, which is directed to the desorption step with water to obtain a desorbed low-basic polycondensation anionite, sent repeatedly to the sulfuric acid sorption operation. Sorption mother liquid of sulfuric acid is directed to the sorption of titanium by a low-basic polymeric anionite to obtain a sorption mother liquid of titanium and a saturated low-basic polymeric anionite. Saturated low-basic polymeric anionite is directed to a desorption step with a solution of sulfuric acid and hydrogen peroxide to obtain a desorbed low-basic polymeric anionite, which is redirected to the sorption of titanium. Mother liquid of titanium sorption is utilized.EFFECT: invention makes it possible to increase the complexity of HSA processing, the degree of desorption and the purity of products obtained.3 cl, 1 dwg, 2 ex, 2 tbl Изобретение может быть использовано в химической, металлургической, электронной промышленности. Для переработки жидких отходов производства диоксида титана проводят экстракцию скандия из гидролизной серной кислоты (ГСК) на экстрагенте, состоящем из смеси ди(2-этилгексил)фосфорной кислоты (Ди2ЭГФК) и трибутилфосфата (ТБФ), с получением насыщенного экстрагента и рафината экстракции. Насыщенный экстрагент промывают раствором серной кислоты и перекиси водорода. Проводят реэкстракцию скандия раствором, состоящим из смеси NaOH и NaCO, с получением концентрата скандия. Серную кислоту из рафината экстракции скандия сорбируют на низкоосновном поликонденсационном анионите с получением маточника сорбции серной кислоты и насыщенного низкоосновного поликонденсационного анионита, который направляют на операцию десорбции водой с получением десорбированного низкоосновного полико