The invention discloses a method for recovering valuable elements from chlorination-process
titanium dioxide waste acid through sectional extraction. The method comprises the following steps: S1, adding a first organic phase into the chlorination-process
titanium dioxide waste acid to obtain a first extraction
raffinate and an iron load, and carrying out back extraction on the iron load to obtaina
ferric chloride solution; S2, adding a second organic phase into the first extraction
raffinate to obtain second extraction
raffinate and a
scandium-
titanium-
zirconium-
niobium load; S3, carrying outback extraction on the
scandium load to obtain a
scandium-titanium-
zirconium-
niobium enriched product; S4, adjusting the pH value of the second extraction raffinate to prepare a liquid; S5, adding athird organic phase after liquid preparation to obtain a
vanadium-aluminum load and a third extraction raffinate; S6, carrying out back extraction on the
vanadium-aluminum load to obtain a
vanadium-aluminum
mixed solution; S7, adjusting the pH value of the third extraction raffinate to prepare a liquid; S8, after liquid preparation, adding a fourth organic phase into
manganese extraction feed liquid to obtain a
manganese load and a fourth extraction raffinate, and carrying out back extraction on the
manganese load to obtain a manganese-containing solution; and S9, neutralizing the fourth extraction raffinate, carrying out filtering, then performing concentrating and crystallizing to obtain NaCl edible salt and water, and recycling the NaCl edible salt and water.