FIELD: chemical industry. SUBSTANCE: present invention describes preparation of 1,1,1,3,3,3-hexafluoroisopropyl ether free from admixture, making it difficult to carry out purification by distillation, by reacting crude fluoromethyl- 1,1,1,3,3,3-hexafluoroisopropyl ether with Brengsted acid (acids), Lewis acid (acids) fixed on resin or similar substance. EFFECT: more efficient purification method. 5 cl
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