METHOD FOR PRODUCTION OF PERFLUOROALKADIENE COMPOUND Russian patent published in 2022 - IPC C07C17/23 C07C21/19 B01J31/26 

FIELD: chemistry.

SUBSTANCE: invention relates to options of a method for the production of a perfluoroalkadiene compound represented by the formula (1), where n is an integer from 4 to 20. According to one of options, the method includes a reaction stage of interaction of a compound represented by the formula (2), where n has above-defined values, substitutes X¹, X², X³, and X⁴ are the same or different and are a halogen atom, provided that X¹ and X² are not a fluor atom at the same time, and X³ and X⁴ are not a fluor atom at the same time, in an organic solvent in the presence of a nitrogen-containing compound, iodine-containing inorganic material, and zinc or zinc alloy. At the same time, the reaction stage includes the first stage of mixing of the solution containing iodine-containing inorganic material, zinc or zinc alloy, and the organic solvent with the nitrogen-containing compound.

EFFECT: method allows for the production of perfuloroalkadiene compounds with higher yield at simultaneous reduction in a number of hard-to-separate impurities.

CF₂=CF-(CF₂)_n-4-CF=CF₂ (1),

CF₂X¹-CFX²-(CF₂)_n-4-CFX³-CF₂X⁴ (2),

13 cl, 3 tbl, 8 ex