METHOD OF OPENING PEROVSKITE CONCENTRATES Russian patent published in 2014 - IPC C22B59/00 C22B3/06 

FIELD: chemistry.

SUBSTANCE: method includes preliminary mechanical treatment of perovskite concentrates and subsequent treatment of activated concentrates with nitric acid solution HNO₃. HNO₃ treatment is carried out on activated perovskite concentrates with stored overall energy which corresponds to change in the surface of coherent scattering regions and microdeformations of not less than 16 kJ/mol perovskite. The activated concentrates are treated with 30% HNO₃ solution at temperature of 90-99°C.

EFFECT: reduced power consumption owing to lower treatment temperature of activated concentrates.

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