METHOD FOR SELECTIVE PRODUCTION OF CFI Russian patent published in 2010 - IPC C07C17/278 C07C19/16 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for selective production of C₆F₁₃I through telomerisation of fluoroalkyl iodide of formula R^fI (where R^f is a C_2-4 fluoroalkyl group) as telogen and tetrafluoroethylene (CF₂CF₂) as taxogen, involving a step for liquid-phase telomerisation which involves supply of a homogeneous liquid mixture of telogen and taxogen from the bottom part of tube reactor, movement of the mixture from the bottom part of the reactor towards its top part in the presence of a radical initiator with dwell time in the reactor of at least 5 minutes. The reaction system is kept in liquid-phase state under conditions where there is separation of gas and liquid, so that taxogen being fed into the reactor is considerably consumed in the reaction in the reactor and the reaction product is released from the top part of the reactor. The radical initiator is a peroxide-type or azo-compound, and molar ratio R^fI/CF₂CF₂ in the liquid mixture of reagents lies between 20 and 200.

EFFECT: high output of telomere, having one given length of the carbon chain.

7 cl, 1 dwg, 2 ex