Method for purifying and removing iron from high-purity hafnium tetrachloride

The invention provides a method for purifying and removing iron from high-purity hafnium tetrachloride, which comprises the following steps: step 1, adding pure water into a round-bottom flask, adding high-purity hafnium oxide powder while stirring, stirring until complete reaction, and filtering to obtain a hafnium oxychloride solution; 2, preparing an extracting agent; step 3, taking the hafnium oxychloride solution and an extracting agent, and extracting to obtain low-iron hafnium oxychloride solution raffinate and a loaded organic phase; step 4, adding the loaded organic phase into a sulfuric acid solution to perform reverse extraction, regenerating the organic phase, and performing extraction operation on the regenerated organic phase to obtain raffinate; 5, the raffinate is subjected to ammonia water precipitation, washing, drying and calcination in sequence, and hafnium oxide is obtained; and 6, mixing hafnium oxide and carbon powder in proportion, adding the mixture into the tubular furnace, replacing