Abstract: The invention relates to a method for producing and purifying 2,3,3,3-tetrafluoro-1-propene using a first composition comprising 2,3,3,3-tetrafluoro-1-propene, 3,3,3-trifluoropropene (1243zf), and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), said method comprising the steps of: (a) bringing said first composition into contact with at least one organic extraction agent in order to form a second composition; (b) extractive distillation of said second composition in order to form (i) a third composition comprising said organic extraction agent, 3,3,3-trifluoropropene (1243zf), and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), and (ii) a stream comprising the 2,3,3,3-tetrafluoro-1-propene; and (c) recovery and separation of said third composition in order to form a stream comprising said organic extraction agent and a stream comprising 3,3,3-trifluoropropene (1243zf) and trans-1,3,3,3-tetra-fluoro-1-propene (1234ze-E).

Abstract: The invention concerns a method for purifying 2-chloro-3,3,3-trifluoropropene (1233xf) from a first composition comprising 2-chloro-3,3,3-trifluoropropene and at least one of the compounds chosen from the group consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zd E), 1,1,1,3,3-pentafluoropropane (245fa) and 1,1,1,3,3,3-hexafluoropropane (236fa), said method comprising the steps of bringing said first composition into contact with at least one organic extractant in order to form a second composition; extractive distillation of said second composition in order to form a third composition comprising at least one of the compounds chosen from the group consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zd E), 1,1,1,3,3-pentafluoropropane (245fa) and 1,1,1,3,3,3-hexafluoropropane (236fa), and said organic extractant; and a stream comprising 2-chloro-3,3,3-trifluoropropene.

Abstract: The invention relates to a method for purifying 1,1,1,2,2-pentafluoropropane (245cb) using a first composition comprising 1,1,1,2,2-pentafluoropropane and at least one of the compounds selected from the group consisting of 1,1-difluoroethane (152a), 1,1,1,2-tetrafluoroethane (134a), trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), cis-1,3,3,3-tetrafluoro-1-propene (1234ze-Z), trans-1,2,3,3,3-pentafluoropropene (1225ye-E), cis-1,2,3,3,3-10 pentafluoropropene (1225ye-Z) and 3,3,3-trifluoropropene (1243zf), said method comprising the steps of: a) bringing said first composition into contact with at least one organic extraction agent in order to form a second composition; b) extractive distillation of said second composition in order to form i) a third composition comprising said organic extraction agent and said at least one of the compounds selected from the group consisting of 1,1-difluoroethane (152a), 1,1,1,2-tetrafluoroethane (134a), trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), cis-1,3,3,3-tetrafluoro-1-p

Abstract: The present invention relates to an azeotropic or quasi-azeotropic composition comprising hydrogen fluoride, 2,3,3,3-tetrafluoropropene and 1,1,1,2,2-pentafluoropropane, characterized in that said composition has a boiling point above 40° C.

Abstract: A process for the production of 2,3,3,3-tetrafluoropropene including the stages: i) in a first reactor, bringing a stream A including 2-chloro-3,3,3-trifluoropropene into contact with hydrofluoric acid in the gas phase in the presence of a catalyst in order to produce a stream B including 2,3,3,3-tetrafluoropropene, HCl, HF and unreacted 2-chloro-3,3,3-trifluoropropene; and ii) in a second reactor, bringing hydrofluoric acid into contact, in the gas phase in the presence or not of a catalyst, with a stream including at least one chlorinated compound selected from the group of 1,1,1,2,3-pentachloropropane, 2,3-dichloro-1,1,1-trifluoropropane, 2,3,3,3-tetrachloropropene and 1,1,2,3-tetrachloropropene, in order to produce a stream C including 2-chloro-3,3,3-trifluoropropene, wherein the stream B obtained in stage i) feeds the second reactor used for stage ii); and wherein the electrical conductivity of the stream A provided in stage i) is less than 15 mS/cm.

Abstract: The present invention relates to a process for the production of 2-chloro-3,3,3-trifluoropropene comprising the stages of: a) providing a stream A comprising at least one of the compounds selected from the group consisting of 2,3-dichloro-1,1,1-trifluoropropane, 1,1,1,2,3-pentachloropropane, 1,1,2,3-tetrachloropropene and 2,3,3,3-tetrachloropropene; b) in a reactor, bringing said stream A into contact with HF in the presence or absence of a catalyst in order to produce a stream B comprising 2-chloro-3,3,3-trifluoropropene; characterized in that the electrical conductivity of said stream A provided in stage a) is less than 15 mS/cm.

Abstract: The present invention relates to a process for producing 2,3,3,3-tetrafluoropropene, comprising the steps of: a) providing a stream A comprising at least one of the compounds selected from the group consisting of 2-chloro-3,3,3-trifluoropropene and 2,3-dichloro-1,1,1-trifluoropropane; b) in a reactor, bringing said stream A into contact with HF in the presence or absence of a fluorination catalyst in order to produce a stream B comprising 2,3,3,3-tetrafluoropropene; characterized in that the electrical conductivity of said stream A provided in step a) is less than 15 mS/cm.

Abstract: The present invention relates to a process for the production of 2,3,3,3-tetrafluoropropene comprising the stages: i) in a first reactor, bringing 2-chloro-3,3,3-trifluoropropene into contact with hydrofluoric acid in the gas phase in the presence of a catalyst, in order to produce a stream A comprising 2,3,3,3-tetrafluoropropene, HF and unreacted 2-chloro-3,3,3-trifluoropropene; and ii) in a second reactor, bringing hydrofluoric acid into contact, in the gas phase in the presence or absence of a catalyst, with at least one chlorinated compound selected from the group consisting of 1,1,1,2,3-pentachloropropane, 2,3-dichloro-1,1,1-trifluoropropane, 2,3,3,3-tetrachloropropene and 1,1,2,3-tetrachloropropene, in order to produce a stream B comprising 2-chloro-3,3,3-trifluoropropene, characterized in that the stream A obtained in stage i) feeds said second reactor used for stage ii); and in that the pressure at the inlet of said first reactor of stage i) is greater than the pressure at the inlet of said second rea

Abstract: The present invention relates to a process for producing a fluorinated compound, comprising the steps of providing a gas stream comprising hydrofluoric acid; providing at least one liquid stream of chlorinated compound; spraying said at least one liquid stream of chlorinated compound to form droplets; vaporizing said droplets produced in step c) by mixing with said gas stream, the resulting mixture being a gas mixture; catalytic reaction of the chlorinated compound with the hydrofluoric acid in the gas phase and collection of a product stream; characterized in that the droplets produced in step c) have a mean diameter of less than 500 ?m. The invention also relates to a facility for performing this process.

Abstract: The invention refers to a process for the production of 2,3,3,3-tetrafluoropropene carried out starting from a starting composition comprising the stages of bringing the starting composition into contact, in the presence of a catalyst, with HF in order to produce a composition A comprising 2,3,3,3-tetrafluoropropene (HFO-1234yf), intermediate products B consisting of 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf), 1,1,1,2,2-pentafluoropropane (HFC-245cb), and byproducts C consisting of E-1-chloro-3,3,3-trifluoro-1-propene (HCFO-1233zdE), trans-1,3,3,3-tetrafluoro-1-propene (HFO-1234zeE) and 1,1,1,3,3-pentafluoropropane (HFC-245fa); recovery of said composition A and purification of the latter in order to form and recover a first gas stream G1 comprising HCl, 2,3,3,3-tetrafluoropropene (HFO-1234yf), a part of the unreacted HF, a part of the intermediate products B and a part of the byproducts C; and a stream, which is preferably liquid, L1 comprising a part of the unreacted HF, a part of the intermediate produc

Abstract: The invention relates to a process for producing 2,3,3,3-tetrafluoropropene performed using a starting composition, comprising the steps of placing the starting composition in contact with HF, in the presence of a catalyst, to produce a composition A comprising 2,3,3,3-tetrafluoropropene (1234yf), intermediate products B consisting of 2-chloro-3,3,3-trifluoropropene (1233xf), 1,1,1,2,2-pentafluoropropane (245cb), and side products C consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zdE), trans-1,3,3,3-tetrafluoro-1-propene (1234zeE) and 1,1,1,3,3-pentafluoropropane (245fa); recovery of said composition A and purification thereof to form and recover a first stream comprising 2,3,3,3-tetrafluoropropene (1234yf) and one or more streams comprising 2-chloro-3,3,3-trifluoropropene (1233xf) and/or 1,1,1,2,2-pentafluoropropane (245cb); recycling into step a) of said one or more streams comprising 2-chloro-3,3,3-trifluoropropene (1233xf) and/or 1,1,1,1,2,2-pentafluoropropane (245cb).

Abstract: A method for preparing tetrafluoropropene utilising three reactors is described. Each reactor comprises a catalytic bed containing a catalyst or a preliminary catalyst. The method comprises the implementation, separately in each of the reactors, of catalytic reactions or reactions regenerating the catalyst, the quantity of catalyst or preliminary catalyst in the catalytic bed of one of the reactors representing between 90% and 110% of the quantity of catalyst or preliminary catalyst contained in the catalytic bed of one of the other two reactors. A facility configured to implement the method is also described.

Abstract: A plant for the manufacture of tetrafluoropropene comprises three reactors for reaction in the gas phase comprising a catalyst bed. The first and second reactor are each configured in order to be fed in turn by a device for feeding with a reaction stream comprising a compound B and hydrofluoric acid; and a device for feeding with a regeneration stream configured in order to feed the reactor with a regeneration stream comprising an oxidizing agent. The third reactor is configured in order to be fed in turn by a device for feeding with a reaction stream comprising a compound A and hydrofluoric acid; said compound A being different from said compound B; and a device for feeding with a regeneration stream configured in order to feed the reactor with a regeneration stream comprising an oxidizing agent.

Abstract: The present invention relates to a catalyst comprising a) from 90% to 99.99% by weight of alumina in which said alumina is at least 90% by weight ?-alumina and b) from 0.01% to 10% by weight of at least one metal of valency 0 selected from the group consisting of Pd, Ru, Pt, Rh and Ir, characterized in that the chloride content of said catalyst is less than 500 ppm, based on the total weight of the catalyst.

Abstract: The invention relates to a method for producing and purifying 2,3,3,3-tetrafluoro-1-propene using a first composition comprising 2,3,3,3-tetrafluoro-1-propene, 3,3,3-trifluoropropene (1243zf), and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), said method comprising the steps of: (a) bringing said first composition into contact with at least one organic extraction agent in order to form a second composition; (b) extractive distillation of said second composition in order to form (i) a third composition comprising said organic extraction agent, 3,3,3-trifluoropropene (1243zf), and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), and (ii) a stream comprising the 2,3,3,3-tetrafluoro-1-propene; and (c) recovery and separation of said third composition in order to form a stream comprising said organic extraction agent and a stream comprising 3,3,3-trifluoropropene (1243zf) and trans-1,3,3,3-tetra-fluoro-1-propene (1234ze-E).

Abstract: The invention relates to a method for purifying 1,1,1,2,2-pentafluoropropane (245cb) using a first composition comprising 1,1,1,2,2-pentafluoropropane and at least one of the compounds selected from the group consisting of 1,1-difluoroethane (152a), 1,1,1,2-tetrafluoroethane (134a), trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), cis-1,3,3,3-tetrafluoro-1-propene (1234ze-Z), trans-1,2,3,3,3-pentafluoropropene (1225ye-E), cis-1,2,3,3,3-10 pentafluoropropene (1225ye-Z) and 3,3,3-trifluoropropene (1243zf), said method comprising the steps of: a) bringing said first composition into contact with at least one organic extraction agent in order to form a second composition; b) extractive distillation of said second composition in order to form i) a third composition comprising said organic extraction agent and said at least one of the compounds selected from the group consisting of 1,1-difluoroethane (152a), 1,1,1,2-tetrafluoroethane (134a), trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), cis-1,3,3,3-tetrafluoro-1-p

Abstract: The present invention relates to a method for producing high-purity 1,1,1,2,3,3-hexafluoropropane and a composition containing mainly 1,1,1,2,3,3-hexafluoropropane, suitable for use as a cleaning agent in the semiconductor industry.

Abstract: The present invention relates to a process for purifying a stream including 1,1,1,2,2-pentafluoropropane, comprising the steps of i) providing a stream A comprising 1,1,1,2,2-pentafluoropropane and at least one of the compounds selected from the group consisting of 2-chloro-1,1,1,3,3-pentafluoropropane, 1,2-dichloro-3,3,3-trifluoropropene, 2-chloro-1,3,3,3-tetrafluoropropene; ii) purification, preferably by distillation, of the stream A provided in i) in order to form a first stream A1 comprising 1,1,1,2,2-pentafluoropropane, preferably recovered at the top of the distillation column, and a second stream A2 comprising said at least one of the compounds selected from the group consisting of 2-chloro-1,1,1,3,3-pentafluoropropane, 1,2-dichloro-3,3,3-trifluoropropene, 2-chloro-1,3,3,3-tetrafluoropropene, preferably recovered at the bottom of the distillation column.

Abstract: The invention concerns a method for purifying 2-chloro-3,3,3-trifluoropropene (1233xf) from a first composition comprising 2-chloro-3,3,3-trifluoropropene and at least one of the compounds chosen from the group consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zd E), 1,1,1,3,3-pentafluoropropane (245fa) and 1,1,1,3,3,3-hexafluoropropane (236fa), said method comprising the steps of bringing said first composition into contact with at least one organic extractant in order to form a second composition; extractive distillation of said second composition in order to form a third composition comprising at least one of the compounds chosen from the group consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zd E), 1,1,1,3,3-pentafluoropropane (245fa) and 1,1,1,3,3,3-hexafluoropropane (236fa), and said organic extractant; and a stream comprising 2-chloro-3,3,3-trifluoropropene.

Abstract: The invention refers to a process for the production of 2,3,3,3-tetrafluoropropene carried out starting from a starting composition comprising the stages of bringing the starting composition into contact, in the presence of a catalyst, with HF in order to produce a composition A comprising 2,3,3,3-tetrafluoropropene (HFO-1234yf), intermediate products B consisting of 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf), 1,1,1,2,2-pentafluoropropane (HFC-245cb), and byproducts C consisting of E-1-chloro-3,3,3-trifluoro-1-propene (HCFO-1233zdE), trans-1,3,3,3-tetrafluoro-1-propene (HFO-1234zeE) and 1,1,1,3,3-pentafluoropropane (HFC-245fa); recovery of said composition A and purification of the latter in order to form and recover a first gas stream G1 comprising HCl, 2,3,3,3-tetrafluoropropene (HFO-1234yf), a part of the unreacted HF, a part of the intermediate products B and a part of the byproducts C; and a stream, which is preferably liquid, L1 comprising a part of the unreacted HF, a part of the intermediate produc