METHOD FOR PRODUCING HALOGENATED ALKENE COMPOUND AND FLUORINATED ALKYNE COMPOUND Russian patent published in 2023 - IPC C07C21/02 C07C17/25 C07C21/22 

FIELD: production of a halogenated butene.

SUBSTANCE: invention relates to variants of a method for the production of a halogenated butene compound represented by formula (2A) CX¹ X² X³ CX⁴ = CHCX⁵ X⁶ X⁷ (2A), in which X¹, X², X³, X⁴, X⁵, X⁶ and X⁷ are the same or different and each represents a halogen atom. In one embodiment, the method includes introducing a halogenated butane compound represented by formula (1A) CX¹ X² X³ CHX⁴ CFHCX⁵ X⁶ X⁷, in which X¹, X², X³, X⁴, X⁵, X⁶ and X⁷ have the meanings defined above, in the gas phase or liquid phase dehydrofluorination reaction, where the dehydrofluorination reaction is carried out in the presence of at least one catalyst, selected from the group consisting of an activated carbon catalyst, a chromium oxide catalyst, and an aluminosilicate catalyst when the dehydrofluorination reaction is carried out in the gas phase. The invention also relates to options for the production of a halogenated butyne compound.

EFFECT: use of the present invention makes it possible to obtain target compounds with a high degree of conversion and high selectivity.

14 cl, 2 dwg, 6 tbl, 20 ex