Method for extracting high-purity scandium oxide from scandium-containing nickel-cobalt hydroxide through short process

The invention discloses a method for extracting high-purity scandium oxide from scandium-containing nickel-cobalt hydroxide through a short process. The method comprises the following steps: curing and leaching scandium-containing nickel-cobalt hydroxide by using concentrated sulfuric acid to obtain scandium-containing nickel-cobalt leachate; performing scandium extraction treatment on the scandium-containing nickel cobalt leaching solution by using an organic extraction agent to obtain a nickel cobalt sulfate solution and a scandium-containing organic phase; performing countercurrent washing on the scandium-containing organic phase by using a detergent to obtain a washing solution and a purified scandium-containing organic phase; subjecting the purified scandium-containing organic phase to first countercurrent reverse extraction treatment through a first reverse extraction agent, so as to obtain first scandium-containing reverse extraction liquid and a first reverse extraction organic phase; performing secon