Recovery of an yttrium europium oxide phosphor from waste fluorescent tubes using a Brønsted acidic ionic liquid, 1‐methylimidazolium hydrogen sulfate

BACKGROUND Spent fluorescent lamps, classified as hazardous waste in the EU, are segregated at source. Processes for the recovery of critical rare‐earth (RE) elements from the phosphor powder waste, however, often involve use of aggressive acid or alkali digestion, multi‐stage separation procedures,...

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