METHOD OF PRODUCING 4,4'-OXYDIPHTHALONITRILE Russian patent published in 2012 - IPC C07C253/30 C07C255/51 C07C255/54 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing 4,4'-oxydiphthalonitrile of formula used as a monomer for synthesis of polyhexazocylanes and polyphthalocyanines, as well as a product in synthesis of polyether imides. The method involves reaction of 4-nitrophthalonitrile with potassium nitite in the medium of an alkylaromatic solvent in the presence of potassium carbonate and a quaternary ammonium salt while heating, wherein the quaternary ammonium salt used is Adogen® 464 (trialkyl(C₈-C₁₀)-methylammonium chloride) or Aliquat® 336 (trioctylmethylammonium chloride). At the end of the reaction, the reaction mass is cooled and the product is separated. The mother solution formed during separation is used in the second and subsequent cycles of producing 4,4'-oxydiphthalonitrile.

EFFECT: method enables to significantly increase output of 4,4'-oxydiphthalonitrile.

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