EP3519378A1 - Procede de fabrication du 1-chloro-2,2-difluoroethane - Google Patents
Procede de fabrication du 1-chloro-2,2-difluoroethaneInfo
- Publication number
- EP3519378A1 EP3519378A1 EP17780836.7A EP17780836A EP3519378A1 EP 3519378 A1 EP3519378 A1 EP 3519378A1 EP 17780836 A EP17780836 A EP 17780836A EP 3519378 A1 EP3519378 A1 EP 3519378A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chloro
- stream
- cis
- trans
- difluoroethane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- ATEBGNALLCMSGS-UHFFFAOYSA-N 2-chloro-1,1-difluoroethane Chemical compound FC(F)CCl ATEBGNALLCMSGS-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 68
- UBOXGVDOUJQMTN-UHFFFAOYSA-N 1,1,2-trichloroethane Chemical compound ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000012074 organic phase Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000000746 purification Methods 0.000 claims abstract description 11
- 150000001875 compounds Chemical class 0.000 claims description 40
- MTKHTBWXSHYCGS-UPHRSURJSA-N (z)-1-chloro-2-fluoroethene Chemical group F\C=C/Cl MTKHTBWXSHYCGS-UPHRSURJSA-N 0.000 claims description 33
- KFUSEUYYWQURPO-OWOJBTEDSA-N trans-1,2-dichloroethene Chemical group Cl\C=C\Cl KFUSEUYYWQURPO-OWOJBTEDSA-N 0.000 claims description 32
- NDKGUMMLYBINOC-UHFFFAOYSA-N 1,2-dichloro-1-fluoroethane Chemical compound FC(Cl)CCl NDKGUMMLYBINOC-UHFFFAOYSA-N 0.000 claims description 28
- KFUSEUYYWQURPO-UPHRSURJSA-N cis-1,2-dichloroethene Chemical group Cl\C=C/Cl KFUSEUYYWQURPO-UPHRSURJSA-N 0.000 claims description 24
- MTKHTBWXSHYCGS-OWOJBTEDSA-N (e)-1-chloro-2-fluoroethene Chemical group F\C=C\Cl MTKHTBWXSHYCGS-OWOJBTEDSA-N 0.000 claims description 23
- 239000003054 catalyst Substances 0.000 claims description 21
- 238000004821 distillation Methods 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000003682 fluorination reaction Methods 0.000 claims description 9
- 239000007800 oxidant agent Substances 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000012071 phase Substances 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- KFUSEUYYWQURPO-UHFFFAOYSA-N 1,2-dichloroethene Chemical class ClC=CCl KFUSEUYYWQURPO-UHFFFAOYSA-N 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- MTKHTBWXSHYCGS-UHFFFAOYSA-N 1-chloro-2-fluoroethene Chemical class FC=CCl MTKHTBWXSHYCGS-UHFFFAOYSA-N 0.000 claims description 3
- BHNZEZWIUMJCGF-UHFFFAOYSA-N 1-chloro-1,1-difluoroethane Chemical compound CC(F)(F)Cl BHNZEZWIUMJCGF-UHFFFAOYSA-N 0.000 abstract 3
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 230000004913 activation Effects 0.000 description 7
- 229910052759 nickel Inorganic materials 0.000 description 6
- UKDOTCFNLHHKOF-FGRDZWBJSA-N (z)-1-chloroprop-1-ene;(z)-1,2-dichloroethene Chemical group C\C=C/Cl.Cl\C=C/Cl UKDOTCFNLHHKOF-FGRDZWBJSA-N 0.000 description 5
- LGXVIGDEPROXKC-UHFFFAOYSA-N 1,1-dichloroethene Chemical group ClC(Cl)=C LGXVIGDEPROXKC-UHFFFAOYSA-N 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 4
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- -1 halides Chemical class 0.000 description 3
- 150000004820 halides Chemical class 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- WGZYQOSEVSXDNI-UHFFFAOYSA-N 1,1,2-trifluoroethane Chemical compound FCC(F)F WGZYQOSEVSXDNI-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- HBACMYVKUQOOTK-UHFFFAOYSA-N FCC.ClCCCl Chemical compound FCC.ClCCCl HBACMYVKUQOOTK-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical group ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910015449 FeCU Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical class [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical class [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 150000001844 chromium Chemical class 0.000 description 1
- QCMJBECJXQJLIL-UHFFFAOYSA-L chromium(6+);oxygen(2-);difluoride Chemical compound [O-2].[O-2].[F-].[F-].[Cr+6] QCMJBECJXQJLIL-UHFFFAOYSA-L 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical group FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 150000004675 formic acid derivatives Chemical class 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 150000002680 magnesium Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- PLHASFSAGNOMLM-UHFFFAOYSA-N nickel(2+);oxido-(oxido(dioxo)chromio)oxy-dioxochromium Chemical compound [Ni+2].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O PLHASFSAGNOMLM-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000003891 oxalate salts Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/093—Preparation of halogenated hydrocarbons by replacement by halogens
- C07C17/20—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
- C07C17/202—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms two or more compounds being involved in the reaction
- C07C17/206—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms two or more compounds being involved in the reaction the other compound being HX
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
- C07C17/383—Separation; Purification; Stabilisation; Use of additives by distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C19/00—Acyclic saturated compounds containing halogen atoms
- C07C19/08—Acyclic saturated compounds containing halogen atoms containing fluorine
- C07C19/10—Acyclic saturated compounds containing halogen atoms containing fluorine and chlorine
- C07C19/12—Acyclic saturated compounds containing halogen atoms containing fluorine and chlorine having two carbon atoms
Definitions
- the present invention relates to the field of saturated fluorinated hydrocarbons. It relates more particularly to a process for producing 1-chloro-2,2-difluoroethane from 1,1,2-trichloroethane.
- HCFC-142 1-Chloro-2,2-difluoroethane is not only known as an expander in the manufacture of foams, but also as a raw material in the manufacture of pharmaceutical or agrochemical compounds.
- WO2015 / 082812 discloses a process for producing 1-chloro-2,2-difluoroethane from 1,1,2-trichloroethane and / or 1,2-dichloroethylene comprising at least one step during which the 1 , 1,2-trichloroethane and / or 1,2-dichloroethylene reacts or reacts with hydrofluoric acid in the gas phase to give a stream comprising 1-chloro-2,2-difluoroethane, hydrochloric acid, hydrofluoric acid and 1,1-dichloroethylene.
- the presence of 1,1-dichloroethylene may be troublesome for subsequent reaction steps.
- the applicant has developed a process for producing 1-chloro-2,2-difluoroethane which does not have the drawbacks of the prior art, in particular a process which avoids the formation of 1,1-dichloroethylene.
- the present invention relates to a process for producing 1-chloro-2,2-difluoroethane from 1,1,2-trichloroethane comprising (i) at least one step in which 1,1,2-trichloroethane reacts with optionally hydrofluoric acid gas phase in the presence of an oxidizing agent, and in the presence or absence of a fluorination catalyst to give a stream comprising 1-chloro-2,2-difluoroethane, hydrochloric acid, hydrofluoric acid and at least one compound (s) A chosen from 1,2-dichloroethylenes (cis and trans), 1 chloro, 2-fluoroethylenes (cis and trans), 1, 2-dichloro-2-fluoroethane and unreacted 1,1,2-trichloroethane; (ii) at least one step of separating the compounds resulting from the reaction stage to give a first stream comprising hydrochloric acid and a second stream comprising hydrofluoric acid, 1-chloro-2,2- difluoro
- step (iii) a purification of the organic phase obtained in step (iii) to form a first stream comprising 1-chloro-2,2-difluoroethane, at least one compound (s) A and hydrofluoric acid and a second current comprising 1,1,2-trichloroethane;
- step a) of purification of the organic phase obtained in (iii) is a distillation, preferably carried out at a temperature of between 30 and 80 ° C. and at an absolute pressure of between 1 and 4 bar.
- the second stream comprising 1, 1,2-trichloroethane is recycled to step (i), preferably after distillation thereof at a temperature between 100 and 170 ° C and at a pressure of absolute between 1 and 4 absolute bar ..
- step b) comprises a step of washing said first stream to form an intermediate stream B comprising 1-chloro-2,2-difluoroethane and said at least one of the compounds A selected from the group cis-1,2-dichloroethylene, trans-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2-fluoroethylene and 1,2-dichloro-1-fluoroethane and a current intermediate C comprising hydrofluoric acid.
- said intermediate stream B is dried to form said third stream.
- the drying is carried out at a temperature of 0 to 30 ° C and an absolute pressure of between 1 and 4 bar.
- the first stream obtained in step a) and the third stream obtained in step b) also comprise trans-1,2-dichloroethylene and optionally at least one of the compounds A selected from the group consisting of cis-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2-fluoroethylene and 1,2-dichloro-1-fluoroethane.
- step c) comprises at least one distillation, preferably carried out preferably by distillation at a temperature of between 35 and 79 ° C. and at an absolute pressure of between 1 and 4 bar.
- the first stream obtained in step a), the intermediate stream B and the third stream obtained in step b) comprise trans-1,2-dichloroethylene and at least one of the selected compounds A from the group consisting of cis-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2-fluoroethylene and 1,2-dichloro-1-fluoroethane.
- the first stream obtained in step a), the intermediate stream B and the third stream obtained in step b) comprise 1-chloro-2,2-difluoroethane, trans-l, 2- dichlorethylene and at least one of the compounds A selected from the group consisting of cis-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2-fluoroethylene and 1,2-dichloroethylene. l-fluoroethane.
- step c) forms a fourth stream comprising 1-chloro-2,2-difluoroethane and trans-1,2-dichloroethylene and a fifth stream comprising at least one of compounds A selected from the group consisting of cis-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2-fluoroethylene and 1,2-dichloro-1-fluoroethane.
- compounds A selected from the group consisting of cis-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2-fluoroethylene and 1,2-dichloro-1-fluoroethane.
- the subject of the present invention is therefore a process for producing 1-chloro-2,2-difluoroethane from 1,1,2-trichloroethane.
- the method comprises the following steps:
- step (v) optionally recycling to step (i) the organic phase after separation from step (iv);
- step (vi) optionally recycling in step (i) the non-organic phase resulting from the step
- step (iv) comprises:
- step (iii) a purification, preferably a distillation, of the organic phase obtained in step (iii) to form a first stream comprising 1-chloro-2,2-difluoroethane, at least one compound (s) A and hydrofluoric acid and a second stream comprising 1,1,2-trichloroethane;
- a catalyst is preferably used in step (i) and advantageously in the presence of an oxidizing agent.
- the temperature of the reaction stage is preferably between 150 and 400 ° C., advantageously between 200 and 350 ° C.
- the pressure at which the fluorination reaction is carried out is preferably between 1 and 30 bar absolute, advantageously between 3 and 20 bar absolute and more particularly between 3 and 15 bar.
- the amount of hydrofluoric acid used in the reaction is preferably between 5 and 40 moles and advantageously between 10 and 30 moles per mole of HCC-140.
- the contact time defined as being the volume of catalyst / total volume gas flow at temperature and pressure of the reaction may be between 2 and 200 seconds, preferably between 2 and 100 seconds, advantageously between 2 and 50 seconds.
- the oxidizing agent pure or mixed with nitrogen may be selected from oxygen and chlorine. Chlorine is preferably chosen.
- the amount of oxidizing agent used is preferably between 0.01 and 20 mol% per mol of F140, advantageously between 0.01 and 0.2 mol% per mole of HCC-140.
- the catalyst used can be mass or supported.
- the catalyst may be based on a metal, in particular a transition metal or an oxide, halide or oxyhalide derivative of such a metal.
- a metal in particular a transition metal or an oxide, halide or oxyhalide derivative of such a metal.
- magnesium such as magnesium derivatives, in particular halides such as MgF 2 or magnesium oxyhalides such as oxyfluorides or aluminum-based ones such as alumina, activated alumina or aluminum derivatives including halides, such as Al F3 or aluminum oxyhalides such as oxyfluoride.
- the catalyst may further comprise cocatalysts selected from Co, Zn, Mn, Mg, V, Mo, Te, Nb, Sb, Ta, P, Ni, Zr, Ti, Sn, Cu, Pd, Cd, Bi rare earths or their mixtures.
- cocatalysts selected from Co, Zn, Mn, Mg, V, Mo, Te, Nb, Sb, Ta, P, Ni, Zr, Ti, Sn, Cu, Pd, Cd, Bi rare earths or their mixtures.
- cocatalysts selected from Co, Zn, Mn, Mg, V, Mo, Te, Nb, Sb, Ta, P, Ni, Zr, Ti, Sn, Cu, Pd, Cd, Bi rare earths or their mixtures.
- the atomic ratio cocatalyst / catalyst is preferably between 0.01 and 5.
- Chromium catalysts are particularly preferred.
- the catalyst used in the present invention can be prepared by coprecipitation of the corresponding salts optionally in the presence of a support.
- the catalyst can also be prepared by co-grinding the corresponding oxides.
- the catalyst Prior to the fluorination reaction, the catalyst is subjected to an activation step with THF at a temperature preferably of between 100 and 450 ° C., advantageously of between 200 and 400 ° C. for a duration of between 1 and 50 hours.
- the activation can be carried out in the presence of the oxidizing agent.
- the activation steps may be carried out at atmospheric pressure or under pressure up to 20 bar.
- the support can be prepared from high porosity alumina.
- the alumina is converted into aluminum fluoride or a mixture of aluminum fluoride and alumina, by fluorination with air and hydrofluoric acid, the conversion rate of the alumina aluminum fluoride depending essentially on the temperature at which the fluorination of the alumina is carried out (generally between 200 ° C and 450 ° C, preferably between 250 ° C and 400 ° C).
- the support is then impregnated with aqueous solutions of chromium salts, nickel and possibly rare earth metal, or with aqueous solutions of chromic acid, nickel or zinc salt, and optionally salts or rare earth oxides and methanol (used as chromium reducer).
- salts of chromium, nickel or zinc and of rare earth metals it is possible to use chlorides, or other salts such as, for example, oxalates, formates, acetates, nitrates and sulphates or nickel dichromate, and rare earth metals, provided that these salts are soluble in the amount of water that can be absorbed by the support.
- the catalyst can also be prepared by direct impregnation of alumina (which is generally activated) using the solutions of chromium, nickel or zinc compounds, and optionally rare earth metals, mentioned above. In this case, the transformation of at least a portion (for example 70% or more) of the alumina into aluminum fluoride or aluminum oxyfluoride is carried out during the activation step of the catalyst metal.
- the activated aluminas that can be used for catalyst preparation are well known, commercially available products. They are generally prepared by calcining alumina hydrates (aluminum hydroxides) at a temperature between 300 ° C and 800 ° C. Alumina (activated or not) can contain significant levels (up to 1000 ppm) of sodium without affecting the catalytic performance.
- the catalyst is conditioned or activated, that is to say transformed into active constituents and stable (at the reaction conditions) by a prior operation called activation.
- This treatment can be carried out either "in situ” (in the fluorination reactor) or in a suitable apparatus designed to withstand the activation conditions.
- the catalyst is dried at a temperature between 100 ° C and 350 ° C, preferably 220 ° C to 280 ° C in the presence of air or nitrogen.
- the dried catalyst is then activated in one or two stages with hydrofluoric acid, optionally in the presence of an oxidizing agent.
- the duration of this activation step by fluorination can be between 6 and 100 hours and the temperature between 200 and 400 ° C.
- the separation step (ii) comprises at least one distillation, advantageously carried out at a temperature of between -60 ° and 120 ° C. and more particularly between -60 and 89 ° C. and an absolute pressure of between 3 and 20 bar and advantageously between 3 and 11 bar.
- the organic phase obtained in step (iii) also comprises at least one of the compounds A selected from the group consisting of cis-1,2-dichloroethylene, trans-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, 1,2-dichloro-1-fluorethane and trans-1-chloro-2-fluoroethylene.
- the non-organic phase obtained in (iii) preferably contains the majority of the HF initially present in the second stream with respect to the organic phase also obtained in step (iii) ).
- the organic phase obtained in (iii) may contain hydrofluoric acid.
- the amount of hydrofluoric acid in the organic phase is less than the amount of hydrofluoric acid in the inorganic phase.
- the molar ratio of the hydrofluoric acid present in the organic phase to the hydrofluoric acid present in the non-organic phase is less than 1: 10, preferably less than 1: 50, in particular 1: 100.
- the non-organic phase obtained in (iii) is purified so that the content of H F is greater than or equal to 90% by weight.
- this purification comprises at least one distillation, advantageously carried out at a temperature of between -23 and 46 ° C. and an absolute pressure of between 0.3 and 3 bar.
- the separation step (iii) comprises at least one settling step, advantageously carried out at a temperature between -20 and 60 ° C and more particularly between -20 and 10 ° C.
- the separation step (iv) comprises a step of purifying the organic phase obtained in (iii) for separating 1-chloro-2,2-difluoroethane and 1,1,2-trichloroethane.
- the organic phase obtained in step (iii) also comprises at least two, three, four or all the compounds A selected from the group consisting of cis-1,2-dichloroethylene, trans-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, 1,2-dichloro-1-fluorethane and trans-1-chloro-2-fluoroethylene; and optionally hydrofluoric acid.
- the organic phase obtained in step (iii) may comprise trans-1,2-dichloroethylene or trans-1,2-dichloroethylene.
- dichloroethylene and cis-1-chloro-2-fluoroethylene or trans-1,2-dichloroethylene cis-1-chloro-2-fluoroethylene and 1,2-dichloro-1-fluorethane or trans-1,2-dichloroethylene, cis- 1-chloro-2-fluoroethylene, 1,2-dichloro-1-fluorethane and cis-1,2-dichloroethylene or trans-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, 1,2-dichloroethane 1-fluorethane, cis-1,2-dichloroethylene and trans-1-chloro-2-fluoroethylene.
- step a) of purification of the organic phase obtained in (iii) is a distillation.
- the distillation of the organic phase obtained in (iii) is carried out at a temperature of 10 to 100 ° C, preferably of 20 to 90 ° C, more preferably of 30 to 80 ° C, and at a pressure of absolute from 0.3 to 8 bar, preferably from 0.5 to 6 bar, more preferably from 1 to 4 bar.
- the first stream obtained in step a) and the third stream obtained in step b) comprise said at least one of the compounds A selected from the group consisting of cis-l, 2- dichloroethylene, trans-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2-fluoroethylene and 1,2-dichloro-1-fluoroethane.
- the first stream obtained in step a) and the third stream obtained in step b) comprise at least two, three, four or all of the compounds A selected from the group consisting of cis-1,2 dichlorethylene, trans-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, 1,2-dichloro-1-fluorethane and trans-1-chloro-2-fluoroethylene.
- the first stream obtained in step a) and the third stream obtained in step b) may comprise trans-1,2-dichloroethylene or trans-1,2-dichloroethylene and cis-1-chloro-2-fluoroethylene. or trans-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene and 1,2-dichloro-1-fluorethane or trans-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, 1,2 1-dichloro-1-fluorethane and cis-1,2-dichloroethylene or trans-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, 1,2-dichloro-1-fluorethane, cis-1,2-dichloroethylene and trans-1-chloro-2-fluoroethylene.
- the second stream comprising 1,1,2-trichloroethane is recycled to step (i), preferably after purification thereof, in particular the purification is a distillation at a temperature of 20 to 300 ° C, preferably from 50 to 250 ° C, more preferably from 75 to 200 ° C, in particular from 100 to 170 ° C and at an absolute pressure of 0.3 to 8 bar, preferably from 0.5 to 6 bar, more preferably 1 to 4 bar.
- step b) comprises a step of washing said first stream to form an intermediate stream B comprising 1-chloro-2,2- difluoroethane and said at least one of compounds A selected from the group consisting of cis-1,2-dichloroethylene, trans-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2 and fluoroethylene and 1,2-dichloro-1-fluoroethane and an intermediate stream C comprising hydrofluoric acid.
- the intermediate stream B can comprise 1-chloro-2,2-difluoroethane and at least at least two, three, four or all of the compounds A selected from the group consisting of cis-1,2-dichloroethylene, trans-1, 2-dichloroethylene, cis-1-chloro-2-fluoroethylene, 1,2-dichloro-1-fluorethane and trans-1-chloro-2-fluoroethylene.
- the intermediate stream B in addition to 1-chloro-2,2-difluoroethane, may comprise trans-1,2-dichloroethylene or trans-1,2-dichloroethylene and cis-1-chloro-2-fluoroethylene or trans-1,2-dichloroethylene.
- the washing step is carried out at a temperature of 0 to 30 ° C.
- the washing step is carried out at an absolute pressure of between 1 and 4 bar.
- said intermediate stream B is dried to form said third stream.
- the drying is carried out at a temperature of 0 to 30 ° C.
- the drying is carried out at an absolute pressure of between 1 and 4 bar.
- the first stream obtained in step a), the intermediate stream B and the third stream obtained in step b) comprise 1-chloro-2,2-difluoroethane, trans-l, 2- dichlorethylene and at least one of the compounds A selected from the group consisting of cis-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2-fluoroethylene and 1,2-dichloroethylene. l-fluoroethane.
- the first stream obtained in step a), the intermediate stream B and the third stream obtained in step b) comprise 1-chloro-2,2-difluoroethane, trans-1,2-dichloroethylene and at least one, two, three or all of the compounds A selected from the group consisting of cis-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, 1,2-dichloro-1-fluorethane and trans-1 chloro-2-fluoroethylene.
- the intermediate stream C comprising hydrofluoric acid may be recycled in step (i).
- step c) the third stream obtained in step b) is purified in step c).
- This is preferably a distillation.
- step c) can be a distillation implemented at a temperature between 35 and 79 ° C, preferably at an absolute pressure between 1 and 4 bar.
- the third stream obtained in step b) comprises 1-chloro-2,2-difluoroethane, trans-1,2-dichloroethylene and at least one of the compounds A selected from the group consisting of cis 1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2-fluoroethylene and 1,2-dichloro-1-fluoroethane.
- step c) of the present process makes it possible to form a fourth stream comprising 1-chloro-2,2-difluoroethane and trans-1,2-dichloroethylene and a fifth stream comprising at least one of the compounds A selected from the group consisting of group consisting of cis-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, trans-1-chloro-2-fluoroethylene and 1,2-dichloro-1-fluoroethane.
- the fifth stream may comprise at least one, two, three or all of the compounds A selected from the group consisting of cis-1,2-dichloroethylene, cis-1-chloro-2-fluoroethylene, 1,2-dichloro-1-fluorethane and trans-1-chloro-2-fluoroethylene, if the third stream comprises at least one, two, three or all of the compounds A selected from the group consisting of cis-1,2 dichlorethylene, cis-1-chloro-2-fluoroethylene, 1,2-dichloro-1-fluorethane and trans-1-chloro-2-fluoroethylene, as mentioned above.
- said first stream obtained in step a), the intermediate stream B, the third stream obtained in step b) and / or the fourth stream are free of 1, 1-dichloroethylene.
- the absence of 1,1-dichloroethylene in said first stream obtained in step a) and / or said intermediate stream B, and / or said third stream obtained in step b) and / or the fourth stream is thus obtained thanks to the present invention.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1659079A FR3056584B1 (fr) | 2016-09-27 | 2016-09-27 | Procede de fabrication du 1-chloro-2,2-difluoroethane |
| PCT/FR2017/052559 WO2018060576A1 (fr) | 2016-09-27 | 2017-09-25 | Procede de fabrication du 1-chloro-2,2-difluoroethane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3519378A1 true EP3519378A1 (fr) | 2019-08-07 |
Family
ID=57485719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17780836.7A Withdrawn EP3519378A1 (fr) | 2016-09-27 | 2017-09-25 | Procede de fabrication du 1-chloro-2,2-difluoroethane |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US10640439B2 (fr) |
| EP (1) | EP3519378A1 (fr) |
| JP (1) | JP2019529450A (fr) |
| CN (1) | CN109790089A (fr) |
| FR (1) | FR3056584B1 (fr) |
| MX (1) | MX2019003139A (fr) |
| RU (1) | RU2019112250A (fr) |
| WO (1) | WO2018060576A1 (fr) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2009316428B2 (en) | 2008-11-20 | 2013-11-07 | Align Technology, Inc. | Orthodontic systems and methods including parametric attachments |
| JP6673395B2 (ja) * | 2018-05-07 | 2020-03-25 | ダイキン工業株式会社 | 1,2−ジフルオロエチレン及び/又は1,1,2−トリフルオロエタンの製造方法 |
| JP6908060B2 (ja) * | 2019-01-16 | 2021-07-21 | ダイキン工業株式会社 | 1−クロロ−1,2−ジフルオロエタンを含む共沸又は共沸様組成物 |
| KR102690745B1 (ko) * | 2019-04-10 | 2024-08-05 | 다이킨 고교 가부시키가이샤 | 1,1,2-트리플루오로에탄, 1-클로로-2,2-디플루오로에탄 또는 1,2-디클로로-1-플루오로에탄과, 불화수소를 포함하는 공비 또는 유사 공비 조성물 |
| WO2025242610A1 (fr) | 2024-05-21 | 2025-11-27 | Specialty Operations France | Procédé de fabrication de 1-chloro-2,2-difluoroéthane par fluoration de 1,1,2-trichloroéthane et/ou de 1,2-dichloroéthylène en phase gazeuse |
| GB202410896D0 (en) * | 2024-07-25 | 2024-09-11 | Mexichem Uk Ltd | Vapour phase catalytic process for the selective conversion of hcc-140 to hcfc-142 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1008575A1 (fr) * | 1998-12-08 | 2000-06-14 | Elf Atochem North America, Inc. | Préparation de 1-chloro-2,2-difluoroethane ("142") |
| TWI615194B (zh) * | 2011-10-12 | 2018-02-21 | 拜耳智慧財產有限公司 | 1,1,2-三氯乙烷及/或1,2-二氯乙烷的催化氣相氟化以產生1-氯-2,2-二氟乙烷 |
| FR3014099B1 (fr) * | 2013-12-04 | 2017-01-13 | Arkema France | Procede de fabrication du 1-chloro-2,2,-difluoroethane |
| CN104692997B (zh) * | 2015-02-11 | 2017-12-22 | 巨化集团技术中心 | 一种1,1‑二氟‑2‑氯乙烷的制备方法 |
| CN104692998B (zh) * | 2015-02-11 | 2018-06-26 | 巨化集团技术中心 | 1,1-二氟-2-氯乙烷的制备方法 |
-
2016
- 2016-09-27 FR FR1659079A patent/FR3056584B1/fr not_active Expired - Fee Related
-
2017
- 2017-09-25 MX MX2019003139A patent/MX2019003139A/es unknown
- 2017-09-25 RU RU2019112250A patent/RU2019112250A/ru not_active Application Discontinuation
- 2017-09-25 US US16/333,600 patent/US10640439B2/en not_active Expired - Fee Related
- 2017-09-25 CN CN201780059443.XA patent/CN109790089A/zh active Pending
- 2017-09-25 JP JP2019515596A patent/JP2019529450A/ja active Pending
- 2017-09-25 WO PCT/FR2017/052559 patent/WO2018060576A1/fr not_active Ceased
- 2017-09-25 EP EP17780836.7A patent/EP3519378A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018060576A1 (fr) | 2018-04-05 |
| US20200002253A1 (en) | 2020-01-02 |
| RU2019112250A (ru) | 2020-10-29 |
| FR3056584A1 (fr) | 2018-03-30 |
| JP2019529450A (ja) | 2019-10-17 |
| FR3056584B1 (fr) | 2020-05-08 |
| MX2019003139A (es) | 2019-06-17 |
| US10640439B2 (en) | 2020-05-05 |
| CN109790089A (zh) | 2019-05-21 |
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