Method of producing pentafluoroiodoethane

FIELD: chemistry.

SUBSTANCE: invention relates to the method of producing pentafluoroiodoethane from perfluoro-propene, which includes the interaction of CF3CF=CF2 with the iodine source, such as iodine-halide I-I, I-Br, I-Cl in the presence of inorganic fluoride, or perfluoro-isopropyl-iodide, and sodium methylate in the polar aprotic solvent with the formation of 1,1,1,2,3,3-hexafluoro-2-iodine-3-methoxy-propane, its subsequent demethylation by boiling with pentachloride antimony with obtaining 2,3,3,3-tetrafluoro-2-iodopropionyl fluoride, and decarbonylation of the latter under the action of pentafluoride antimony on heating, which gives pentafluoroiodetane.

EFFECT: use of available non-explosive raw materials.

4 cl, 5 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing 1,4-diiodoperfluorobutane by reacting 1,2-diidoperfluroethane with tetrafluoroethylene, which involves heating 1,2-diidoperfluorethane, feeding tetrafluoroethylene into a reactor with 1,2-diiodoperfluoroethane, holding the obtained mixture at high temperature and pressure. The process is carried out in two steps: at the first step, temperature of the process is equal to 180-200°C and pressure of tetrafluoroethylene in the reactor is equal to 1.3-1.7 MPa, and at the second step, temperature in the reactor is equal to 150-170°C and pressure in the reactor is equal to 0.7-1.0 MPa. The obtained crude 1,4-diiodoperfluorobutane undergoes fractionation at low pressure to extract the 1,2-diiodoperfluoroethane fraction which is returned to the step for producing 1,4-diiodoperfluorobutane, and the fraction of the desired product.

EFFECT: high selectivity of the process with respect to 1,4-diiodoperfluorobutane, possibility of conducting the process without the intermediate operation for removing gaseous products during synthesis, and low consumption of raw materials.

2 cl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method for selective production of C6F13I through telomerisation of fluoroalkyl iodide of formula RfI (where Rf is a C2-4 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 RfI/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

The invention relates to organic chemistry, in particular to a method of obtaining Pentafluoroethane, which is used in the reactions telomerization and as raw material for the preparation of many organic compounds

d-arabinofuranosyl-2-amino-6-methoxy - n-purines" target="_blank">

The invention relates to 9--D-arabinofuranosyl-2-amino-6-methoxy-N-purine and its derivatives and 9--D-arabinofuranosyl-2-amino-6-methoxy-N-purine and its derivatives and pharmaceutical compositions comprising these derivatives of purine, which is active against viral infections in humans caused by the virus stays zoster (VZV)

The invention relates to a method of decarboxylation of golodnikov or esters of perfluorinated carboxylic acids in order to obtain the corresponding perfluoroolefins or perfluoroalkyl vinyl ethers, which are used as feedstock for the synthesis of polymeric materials with improved performance characteristics

FIELD: chemistry.

SUBSTANCE: invention relates to the method of producing pentafluoroiodoethane from perfluoro-propene, which includes the interaction of CF3CF=CF2 with the iodine source, such as iodine-halide I-I, I-Br, I-Cl in the presence of inorganic fluoride, or perfluoro-isopropyl-iodide, and sodium methylate in the polar aprotic solvent with the formation of 1,1,1,2,3,3-hexafluoro-2-iodine-3-methoxy-propane, its subsequent demethylation by boiling with pentachloride antimony with obtaining 2,3,3,3-tetrafluoro-2-iodopropionyl fluoride, and decarbonylation of the latter under the action of pentafluoride antimony on heating, which gives pentafluoroiodetane.

EFFECT: use of available non-explosive raw materials.

4 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method for selective production of C6F13I through telomerisation of fluoroalkyl iodide of formula RfI (where Rf is a C2-4 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 RfI/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

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing 1,4-diiodoperfluorobutane by reacting 1,2-diidoperfluroethane with tetrafluoroethylene, which involves heating 1,2-diidoperfluorethane, feeding tetrafluoroethylene into a reactor with 1,2-diiodoperfluoroethane, holding the obtained mixture at high temperature and pressure. The process is carried out in two steps: at the first step, temperature of the process is equal to 180-200°C and pressure of tetrafluoroethylene in the reactor is equal to 1.3-1.7 MPa, and at the second step, temperature in the reactor is equal to 150-170°C and pressure in the reactor is equal to 0.7-1.0 MPa. The obtained crude 1,4-diiodoperfluorobutane undergoes fractionation at low pressure to extract the 1,2-diiodoperfluoroethane fraction which is returned to the step for producing 1,4-diiodoperfluorobutane, and the fraction of the desired product.

EFFECT: high selectivity of the process with respect to 1,4-diiodoperfluorobutane, possibility of conducting the process without the intermediate operation for removing gaseous products during synthesis, and low consumption of raw materials.

2 cl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a process for preparing α,ω-diyodoperftoralkane, comprising combining the components: a diatomic iodine and perfluoroalkylene oxide represented by formula where Rf It represents a perfluoroalkyl group; and at least one of: a) the first metal compound comprising nickel and the second metal compound comprising molybdenum, compositionally different from the first metal compound; or b) a metal alloy comprising from 50 to 70 percent by weight of nickel and from 20 to 40 percent by weight of molybdenum based on the total weight of metal alloy, thereby producing a product represented by the formula I(CF2)nI, wherein n is independently an integer ranging from 1 to 11. The total mass of the at least one product, where n equals 3 or more, exceeding the total weight of at least one product, wherein n is 1 or 2, at least 4 times.

EFFECT: higher yield of the desired product with a minimum yield of C1 and C2 homologous byproducts.

22 cl, 6 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the method of producing pentafluoroiodoethane from perfluoro-propene, which includes the interaction of CF3CF=CF2 with the iodine source, such as iodine-halide I-I, I-Br, I-Cl in the presence of inorganic fluoride, or perfluoro-isopropyl-iodide, and sodium methylate in the polar aprotic solvent with the formation of 1,1,1,2,3,3-hexafluoro-2-iodine-3-methoxy-propane, its subsequent demethylation by boiling with pentachloride antimony with obtaining 2,3,3,3-tetrafluoro-2-iodopropionyl fluoride, and decarbonylation of the latter under the action of pentafluoride antimony on heating, which gives pentafluoroiodetane.

EFFECT: use of available non-explosive raw materials.

4 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a partially fluorinated compound I (CF2)xCH=CH2, where x is 3, as well as the method for its preparation, comprising the reaction of a compound of the formula I (CF2)xI with ethylene to produce a compound of the formula I (CF2)xCH2CH2I and the dehydroiodination thereof to obtain the claimed compound (the value of x in these formulas is 3). The invention relates to a fluoropolymer for vulcanization comprising a polymerized reaction product of: (a) a partially fluorinated compound and (b) a fluorinated olefin monomer; to a rubber product for sealing moulded from a vulcanized fluoropolymer; to a process for producing a fluoropolymer, comprising: (a) providing a partially fluorinated compound, a fluorinated olefin monomer, and an initiator; and (b) polymerizing a partially fluorinated compound and a fluorinated olefin monomer to produce a fluoropolymer.

EFFECT: good physical properties, vulcanization properties and curing time, long-term stability.

13 cl, 2 tbl, 4 ex

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