EP4025314A1 - Procédé de purification d'hydrofluorocarbures - Google Patents
Procédé de purification d'hydrofluorocarburesInfo
- Publication number
- EP4025314A1 EP4025314A1 EP20764418.8A EP20764418A EP4025314A1 EP 4025314 A1 EP4025314 A1 EP 4025314A1 EP 20764418 A EP20764418 A EP 20764418A EP 4025314 A1 EP4025314 A1 EP 4025314A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chloro
- trifluoropropene
- tetrafluoropropene
- pentafluoropropane
- dichloro
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/08—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in rotating vessels; Atomisation on rotating discs
-
- 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
Definitions
- the present invention relates to a process for purifying hydrohalocarbon compounds.
- the present invention relates to a process for purifying hydrohalocarbon compounds by distillation.
- Hydrofluorocarbons such as 2,3,3,3-tetrafluoro-l-propene (HFO-1234yf) are compounds known for their properties as refrigerants and heat transfer fluids, extinguishers, propellants, foaming agents, blowing agents, gaseous dielectrics, polymerization or monomer medium, carrier fluids, abrasive agents, drying agents and fluids for power generation unit.
- HFCs hydrofluorocarbons
- HFOs hydrofluoroolefins
- HFO-1234yf 2,3,3,3-tetrafluoro-l-propene
- HFOs have been identified as desirable alternatives to HCFCs due to their low ODP (Ozone Depletion Potential) and GWP (Global Warming Potential) values.
- hydrofluoroolefins Most of the processes for manufacturing hydrofluoroolefins involve a fluorination and / or dehydrohalogenation reaction. This type of reaction is carried out in the gas phase and generates impurities which must therefore be removed in order to obtain the desired compound in a sufficient degree of purity for the intended applications.
- HFC-240db (1,1,1,2,3-pentachloropropane)
- WO 2013/088195 Reference is made, for example, to document WO 2013/088195 in this regard.
- impurities are isomers of the main compounds intended to be obtained by the process for the production of 2,3,3,3-tetrafluoro-1-propene besides the latter, ie 2-chloro-3,3,3-trifluoro-l- propene (1233xf) and 1,1,1,2,2-pentafluoropropane (245cb).
- 2-chloro-3,3,3-trifluoro-l-propene (1233zd) 1,3,3,3-tetrafluoro-l-propene (1234ze) and 1,1, 1,3,3-pentafluoropropane (245fa)
- these can accumulate in the reaction loop and thus prevent the formation of the products of interest.
- hydrofluoroolefins having a low content of impurities.
- impurities which are toxic and / or flammable and / or which are difficult to separate from the desired hydrofluoroolefin should be minimized.
- the present invention relates to a method of purifying a composition comprising a hydrohalocarbon B comprising the steps of: i) providing a composition Al comprising a hydrohalocarbon B and at least one impurity C different from said hydrohalocarbon B, ii) compressing said composition Al, and optionally cooling thereof, so as to obtain said hydrohalocarbon B in liquid form to form a liquid stream A2 comprising said hydrohalocarbon B, iii) distillation of said stream A2 obtained in step ii) to form and recover a stream A3 comprising said hydrohalocarbon B, characterized in that step iii) is carried out in a pressure distillation device comprising one or more bed (s) with rotary packing.
- said stream A2 is introduced in liquid form into said one or more rotary-packed bed (s) and is distributed therein radially with respect to its axis of rotation.
- the speed of said one or more rotary-lined bed (s) is from 100 to 3000 revolutions per minute (rpm), advantageously from 200 to 2500 rpm, preferably from 500 to 2000 rpm.
- step iii) is carried out at a pressure of 2 to 200 bars absolute, preferably 5 to 100 bars absolute, more preferably 5 to 40 bars absolute, in particular 5 to 30 bars absolute bars.
- said hydrohalocarbon B comprises three carbon atoms and at least one halogen atom.
- said hydrohalocarbon B is selected from group B1 consisting of 2,3,3,3-tetrafluoropropene, 2-chloro-3,3,3-trifluoropropene, 1, 3,3,3-tetrafluoropropene, l-Chloro-3,3,3-trifluoropropene, 1,1,1,2,2-pentafluoropropane, 2-chloro-1,1,1,2-tetrafluoropropane, 2,3-dichloro-l, l, l- trifluoropropane, 3,3,3-trifluoropropene,
- said at least one impurity C is selected from the group Cl consisting of chloromethane, dichloromethane, tetrachloromethane, trichlorofluoromethane, dichlorodifluoromethane, trichlorotrifluoroethane, dichlorotetrafluoroethane, chloropentafluoroethane, fluoromethane, difluoroethane, 1.1 fluoromethane, difluoroethane, 1.1 fluoromethane, difluoroethane , 1,2-difluoroethane, 1,1,1-trifluoroethane, 1,1,2-trifluoroethane, 3,3,3-trifluoropropyne, methane, ethane, propane, 1,1,1-trifluoroethane,
- said stream A3 comprises said hydrohalocarbon B in a mass content greater than 90% by weight based on the total weight of said stream A3.
- the content of said at least one impurity C is less than 1% by weight.
- said pressurized distillation device comprises an inlet making it possible to feed it with a flow sweeping against the said rotary packed bed.
- the present invention makes it possible to separate hydrohalocarbon constituents more efficiently than with cryogenic distillation installations.
- Cryogenic distillation of hydrofluorocarbon compounds requires a very low distillation temperature taking into account their boiling points and even bulky installations taking into account the close boiling points of these different components.
- the present invention provides a surprising method making it possible to use more compact and less energy-consuming installations since the method can be carried out at temperatures close to ambient thanks to the use of the device under pressure (the temperature of the device can be further regulated by water rather than with other cooling mixtures).
- the use of a pressurized and rotating device makes it possible to separate the constituents of the flow thanks to the centrifugal force and makes it possible to avoid the formation of azeotropes often present with the hydrohalocarbon compounds.
- FIG. 1 shows a schematic view of a pressurized distillation device comprising a rotary packed bed according to a particular embodiment of the invention.
- Figure 2 shows a schematic view of a pressurized distillation device comprising two rotary packed beds according to a particular embodiment of the invention.
- Figure 3 shows a schematic view of a pressurized distillation device comprising two rotary packed beds according to another particular embodiment of the invention.
- FIG. 4 shows a schematic view of a pressurized distillation device comprising two rotary packed beds arranged operating at different pressures according to a particular embodiment of the invention.
- the present invention relates to a method of purifying a composition comprising a hydrohalocarbon B.
- said method comprises the step of: i) providing a composition Al comprising a hydrohalocarbon B and at least one impurity C different from said hydrohalocarbon compound B.
- said hydrohalocarbon compound B comprises from 1 to 10 carbon atoms, more preferably said hydrohalocarbon compound B comprises from 2 to 9 carbon atoms, in particular from 2 to 8 carbon atoms, more particularly from 2 to 7 carbon atoms. .
- said hydrohalocarbon compound B comprises at least one halogen atom.
- said hydrohalocarbon compound B comprises two, three, four, five, six, seven, eight, nine or ten halogen atoms.
- the halogen atom is F or Cl.
- said hydrohalocarbon compound B comprises from 1 to 10 carbon atoms, more preferably said hydrohalocarbon compound B comprises from 2 to 9 carbon atoms, in particular from 2 to 8 carbon atoms, more particularly from 2 to 7 carbon atoms. and at least one halogen atom, advantageously two, three, four, five, six, seven, eight, nine or ten halogen atoms; the halogen atom being F or Cl.
- said hydrohalocarbon B comprises three carbon atoms and at least one halogen atom.
- said hydrohalocarbon B comprises three carbon atoms and from two to 7 halogen atoms selected from F and Cl.
- said hydrohalocarbon B is selected from group B1 consisting of 2,3,3,3-tetrafluoropropene, 2-chloro-3,3,3-trifluoropropene, 1,3, 3, 3-tetrafluoropropene, 1-chloro-3,3,3-trifluoropropene, 1,1,1,2,2-pentafluoropropane, 2-chloro-
- Said at least one impurity C comprises from 1 to 10 carbon atoms, advantageously from 2 to 9 carbon atoms, preferably from 2 to 8 carbon atoms, in particular from 2 to 7 carbon atoms.
- Said at least one impurity C can comprise one or more halogen atoms on its carbon chain, preferably the halogen atom is chosen from Cl or F.
- said at least one impurity C is selected from the group Cl consisting of chloromethane, dichloromethane, tetrachloromethane, trichlorofluoromethane, dichlorodifluoromethane, trichlorotrifluoroethane, dichlorotetrafluoroethane, chloropentafluoroethane, fluoromethane, difluoromethane, trifluoromethane, fluoroethane, 1,1-difluoroethane, 1,2-difluoroethane, 1,1,1-trifluoroethane, 1,1, 2-trifluoroethane, 3,3,3-trifluoropropyne, methane, ethane, propane, 1,1,1-trifluoroethane, 1, 1,1, 2, 3,3,3-heptachloropropane, 1,1,1,2, 2,3,3-heptachloropropane, 2-chloro-l, 1,1, 3, 3, 3, 3,
- said composition A1 comprises a hydrohalocarbon B selected from group B1 as defined above; and at least one impurity C selected from the group C1 as defined above.
- said composition A1 comprises a hydrohalocarbon B selected from group B1 as defined above and at least two impurities C selected from group C1 as defined above, said impurities C being different from said hydrohalocarbon B.
- said composition A1 comprises a hydrohalocarbon B selected from group B1 as defined above; and at least three, advantageously at least four, preferably at least five, more preferably at least six, in particular at least seven, more particularly at least eight, preferably at least nine, preferably at least ten impurities C selected from group C1 as defined above, said impurities C being different from said hydrohalocarbon B.
- said composition A1 comprises a hydrohalocarbon B selected from group B2 consisting of 2,3,3,3-tetrafluoropropene, 2-chloro-3,3,3-trifluoropropene, 1, 3,3,3-tetrafluoropropene, l -chloro-3,3,3-trifluoropropene, 1,1,1,2,3-pentafluoropropene; and at least one, advantageously at least two, preferably at least three, more preferably at least four, in particular at least five, more particularly at least six, preferably at least seven, advantageously at least eight, of preferably at least nine, particularly preferably at least ten impurity (s) C selected from the group C2 consisting of chloromethane, 3,3,3-trifluoropropyne, 1,1,1-trifluoroethane, 1, 1,1, 3,3,3- hexafluoropropane, 1,1,2,2,3,3-hexafluoropropane, 1,1,1,2,2,
- said composition Al comprises at least 20% by weight of said hydrohalocarbon B based on the total weight of said composition.
- said composition A1 comprises at least 22%, at least 24%, at least 26%, at least 28%, at least 30%, at least 32%, at least 34%, at least 36%, at least 38 %, at least 40%, at least 42%, at least 44%, at least 46%, at least 48%, at least 50%, at least 52%, at least 54%, at least 56%, at least 58 %, at least 60%, at least 62%, at least 64%, at least 66%, at least 68%, at least 70%, at least 72%, at least 74%, at least 76%, at least 78 %, at least 80%, at least 82%, at least 84%, at least 86%, at least 88%, at least 90%, at least 92%, at least 94%, at least 96%, at least 98 % by weight of said hydrohalocarbon B based on the total weight of said composition.
- said composition A1 comprises at least 80% by weight of said at least one impurity C based on the total weight of said composition.
- composition Al comprises several impurities C, the content mentioned above is that of all the impurities C included in said composition Al.
- said composition Al comprises less than 78%, less than 76%, less than 74 %, less than 72%, less than 70%, less than 68%, less than 66%, less than 64%, less than 62%, less than 60%, less than 58%, less than 56%, less than 54 %, less than 52%, less than 50%, less than 48%, less than 46%, less than 44%, less than 42%, less than 40%, less than 38%, less than 36%, less than 34 %, less than 32%, less than 30%, less than 28%, less than 26%, less than 24%, less than 22%, less than 20%, less than 18%, less than 16%, less than 14 %, less than 12%, less than 10%, less than 8%, less than 6%, less than %,
- said Al composition is compressed.
- said composition Al is compressed and then cooled to a temperature such that said hydrohalocarbon B is in liquid form.
- said hydrohalocarbon B is in liquid form before the implementation of step iii).
- said at least one impurity C can also be in liquid form.
- composition A1 comprises several impurities C, all or part of said impurities C can be in liquid form.
- all or part of the composition A1 can be in liquid form.
- said composition Al is compressed under a pressure of 2 bars absolute to 200 bars absolute, preferably 5 to 100 bars absolute, more preferably 5 to 40 bars absolute, in particular 5 bars. at 30 bars absolute.
- said composition A1 is compressed at a pressure greater than or equal to the pressure at which step iii) is carried out.
- the compression can be carried out in stages to result in a pressure greater than or equal to the pressure at which step iii) is carried out.
- an intermediate withdrawal of one or more impurities C as defined in the present application can be implemented.
- step ii) allows the formation of a stream A2 comprising said hydrohalocarbon B selected from group B1 or B2 as defined above.
- the stream A2 is in liquid form.
- Said stream A2 can also comprise one or more impurity (s) C selected from the group C1 or C2 as defined above; these preferably being in liquid form.
- the stream A2 can comprise a liquid phase and a gas phase; said liquid phase comprising said hydrohalocarbon B selected from group B1 or B2 as defined above and optionally one or more impurity (s) C selected from group C1 or C2 as defined above being in liquid form under the temperature and pressure conditions chosen for the implementation of step ii).
- Said gas phase may comprise one or more impurity (s) C selected from the group Cl or C2 as defined above being in gaseous form under the temperature and pressure conditions chosen for the implementation of the step ii).
- said stream A2 comprises said hydrohalocarbon B selected from group B1 as defined above; and said at least one impurity C selected from the group C1 as defined above.
- said stream A2 comprises said hydrohalocarbon B selected from group B1 as defined above and said at least two impurities C selected from group C1 as defined above, said impurities C being different from said hydrohalocarbon B.
- said stream A2 comprises said hydrohalocarbon B selected from group B1 as defined above; and said at least three, advantageously at least four, preferably at least five, more preferably at least six, in particular at least seven, more particularly at least eight, preferably at least nine, preferably at least ten impurities C selected from the group C1 as defined above
- said stream A2 comprises said hydrohalocarbon B selected from group B2 as defined above; and said at least one (said) at least one, advantageously at least two, preferably at least three, more preferably at least four, in particular at least five, more particularly at least six, preferably at least seven, in an advantageously preferred manner at at least eight, preferably at least nine, particularly preferably at least ten impurity (s) C selected from group C2 as defined above; the said impurity (s) C being different (s) from said hydrohalocarbon B.
- said impurity (s) C being different (s) from said hydrohalocarbon B.
- said stream A2 comprises at least 20% by weight of said hydrohalocarbon B based on the total weight of said stream.
- said flow A2 comprises at least 22%, at least 24%, at least 26%, at least 28%, at least 30%, at least 32%, at least 34%, at least 36%, at least 38 %, at least 40%, at least 42%, at least 44%, at least 46%, at least 48%, at least 50%, at least 52%, at least 54%, at least 56%, at least 58 %, at least 60%, at least 62%, at least 64%, at least 66%, at least 68%, at least 70%, at least 72%, at least 74%, at least 76%, at least 78 %, at least 80%, at least 82%, at least 84%, at least 86%, at least 88%, at least 90%, at least 92%, at least 94%, at least 96%, at least 98 % by weight of said hydrohalocarbon B based on the total weight of said stream.
- said stream A2 comprises less than 80% by weight of said at least one impurity C based on the total weight of said stream.
- said stream A2 comprises several impurities C, the content mentioned above is that of all the impurities C included in said stream A2.
- said flow A2 comprises less than 78%, less than 76%, less than 74%, less 72%, less than 70%, less than 68%, less than 66%, less than 64%, less than 62%, less than 60%, less than 58%, less than 56%, less than 54%, less 52%, less than 50%, less than 48%, less than 46%, less than 44%, less than 42%, less than 40%, less than 38%, less than 36%, less than 34%, less 32%, less than 30%, less than 28%, less than 26%, less than 24%, less than 22%, less than 20%, less than 18%, less than 16%, less than 14%, less 12%, less than 10%, less than 8%, less than 6%, less than 4%, less than 2% by weight of said at least one (of) impurity (s) C on the basis of the total weight of said stream A2.
- the present process also comprises a step of: iii) distillation of said stream A2 obtained in step ii) to form and recover a stream A3 comprising said hydrohalocarbon B.
- said stream A2 obtained in step ii) is distilled in conditions suitable for forming and recovering a stream A3 comprising said hydrohalocarbon B.
- the implementation of step iii) also makes it possible to recover an A4 stream comprising at least part, preferably all, of said at least one impurity C present in said stream A2.
- said step iii) is carried out in a pressurized distillation device comprising one or more rotary packed bed (s) in which the centrifugal force replaces the force of gravity of a column of classic distillation.
- Said pressure distillation device may comprise two, three, four, five, six, seven, eight, nine, ten or more than ten rotary packing bed (s).
- Said rotary packed beds may be arranged in cascade or in separate compartments within said pressure distillation device. Each of said rotatably packed beds may have the same or different pressure.
- FIG. 1 schematically illustrates a pressurized distillation device 1 comprising a rotary packed bed 2.
- Said rotary packed bed is connected to an axis 3 connected to motor 4 allowing the rotation of said rotary packed bed around axis 3.
- the axis 3 and the motor 4 make it possible to regulate the speed of rotation of said rotary packed bed 2.
- the rotary packed bed can have different configurations known to those skilled in the art making it possible to have sufficient permeability to the liquid flow and to the liquid. gas streams in order to optimize their circulation within the rotary-lined bed 2.
- Applications US 2017/0028311 and US 2016/0317967 in particular describe rotary-lined beds with different configurations.
- Said pressure distillation device 1 also comprises a first inlet 10 making it possible to supply said pressure distillation device 1 with a liquid or at least partially liquid flow 8.
- said first inlet 10 makes it possible to supply said pressurized distillation device 1 with said stream A2 as defined in the present application.
- Said pressure distillation device 1 also comprises a second inlet 5 making it possible to feed said pressure distillation device 1 with a flow 7.
- said second inlet 5 is arranged on the periphery of the pressure distillation device 1, in order to sweep against the current said rotary packed bed 2
- the stream 7 can be a solvent or an inert gas such as, for example, nitrogen or air.
- Said solvent can be an organic extraction agent capable of dissolving one or more impurities C contained in said A2.
- an inert gas during the distillation makes it possible to promote the separation between the different constituents of the liquid or partially liquid stream 8, ie of the stream A2.
- the inert gas can thus make it possible to entrain in the gas phase at least part of said impurities C initially present in the stream A2.
- the inert gas can entrain in the gas phase said stream A3 comprising said hydrohalocarbon B and in which the content of impurities C has been reduced.
- Said pressure distillation device 1 also comprises a first outlet 9 and a second outlet 11.
- Said first outlet 9 makes it possible to recover a gas flow 6.
- Said first outlet 9 can be arranged at the periphery or in the center of said device 1.
- Said second outlet 11 makes it possible to recover a liquid stream 12.
- said stream A3 comprising said hydrohalocarbon B can be recovered in gaseous form via said first outlet 9 (ie said stream A3 will be gas stream 6) or via said second outlet 11 (ie said stream A3 will be said liquid stream 12).
- said stream A4 is recovered via said second outlet 11 in liquid form.
- said stream A4 is recovered in gaseous form via said first outlet 9.
- Said second outlet 11 can feed another rotary packed bed arranged on the same axis of rotation or said second outlet 11 can feed another rotary packed bed operating at a different pressure.
- Said flow A2 is introduced into said rotary packed bed 2 and is distributed radially with respect to the axis of rotation thereof, that is to say radially with respect to axis 3. From preferably, said flow A2 is introduced parallel to the axis of rotation of said rotary packed bed 2. In particular, said flow A2 is introduced parallel to the axis of rotation 3 of said rotary lined bed 2 and is distributed radially by relative to the axis of rotation of the latter, that is to say radially with respect to the axis 3. FIG.
- FIG. 2 illustrates a pressurized distillation device 1 comprising two beds with rotary packing 2a, 2b .
- the pressure distillation device 1 operates as described above in relation with FIG. 1. In this embodiment with two beds with rotary packing arranged in cascade, the pressure is identical in the two beds 2a and 2b.
- the stream A2 introduced into the device 1 feeds the first rotary-lined bed 2a then the second rotary-lined bed 2b.
- the liquid flows from the first rotary-lined bed 2a to the second rotary-lined bed 2b through the center of the device 20.
- the gas flow 7 introduced through said second inlet 5 flows within the rotary lining 2b then through the center. of the device 20, the rotary packed bed 2a to be recovered by the first outlet 9.
- the gas flow 7 will concentrate in impurities C or in hydrohalocarbon.
- FIG. 3 also illustrates an embodiment in which the pressurized distillation device 1 comprises two rotary packed beds 2a, 2b.
- the rotary-lined beds 2a and 2b are configured in the form of two combs arranged in staggered rows. Preferably, only one of the two combs is in rotation. Preferably, packing is also present between the branches of the combs so as to increase the contact surface.
- packing is also present between the branches of the combs so as to increase the contact surface.
- the liquid flow for example the flow A2
- introduced by the first inlet 10 flows into the first rotary-lined bed 2a then towards the second rotary-lined bed 2b through the center of the device 20 to be recovered at the level of the second outlet 11.
- the gas flow 7 follows the reverse path from the second inlet 5 to the first outlet 9.
- FIG. 4 illustrates another embodiment in which the pressurized distillation device 1 comprises two rotary packed beds 2a and 2b.
- the two rotary lined beds 2a and 2b operate independently of each other.
- the temperature of each bed can be adjusted independently as can the pressure.
- the liquid fluid can be heated or cooled between each stage.
- the introduction of the liquid flow can be done in one of the lower stages.
- the pressurized distillation device 1 comprises a first stage 1a comprising a rotary packed bed 2a and a second stage 1b comprising a rotary packed bed 2b.
- the pressure in the rotary packed bed 2a is different from that in the rotary packed bed 2b.
- Said rotary-lined bed 2a is connected to an axis 3a connected to a motor 4a (not shown) allowing the rotation of said rotary-lined bed 2a about the axis 3a.
- the axis 3a and the motor 4a make it possible to regulate the speed of rotation of said rotary packed bed 2a.
- Said rotary-lined bed 2b is connected to an axis 3b connected to a motor 4b allowing the rotation of said rotary-lined bed 2b about the axis 3b.
- the axis 3b and the motor 4b make it possible to regulate the speed of rotation of said rotary packed bed 2b.
- Said pressure distillation device 1 also comprises a first inlet 10 making it possible to supply the rotary packed bed 2a with a liquid or at least partially liquid flow 8, preferably with said flow A2.
- Said pressure distillation device 1 also comprises a second inlet 5a making it possible to supply the rotary packed bed 2a with a flow 7a. This latter flow 7a is equivalent to flow 7 defined above.
- Said rotary packed bed 2a is connected to a first outlet 9a and a second outlet 11a.
- Said first outlet 9a makes it possible to recover a gas flow 6.
- Said second outlet 11a makes it possible to recover a liquid flow which feeds said rotary packed bed 2b.
- Said rotary packed bed 2b is connected to a third outlet 9b and a fourth outlet 11b.
- Said third outlet 9b makes it possible to recover a gas flow which feeds said rotary packed bed 2a.
- Said third output 9b can be connected to said second input 5a.
- Said fourth outlet 11b makes it possible to recover a liquid flow.
- the liquid flow 8 introduced by the first inlet 10 flows into the first stage 1a comprising the first rotary packed bed 2a then flows to the second stage comprising the second rotary packed bed 2b via the second outlet 11a to be recovered. at the fourth exit 11b.
- the second outlet 11a is preferably arranged so as to allow the introduction of the liquid flow in the center of the second rotary packed bed 2b.
- the blocks 13a, 13b, 13c and 13d aim to promote the flow of the gas flow towards the outlets 9a and 9b.
- the flow rate of the liquid passing through the second outlet 11a can be adapted to prevent gas from flowing through the latter and to promote the flow of the gas flow towards the third outlet 9b.
- Blocks 13 may also be present in the devices shown in Figures 1, 2 and 3 to force the gas flow 7 to pass through the packed bed. These blocks are not shown in Figures 1, 2 and 3 for clarity. It is known practice to those skilled in the art to place these blocks at the places making it possible to generate a pressure drop in the passage of the gas in order to force it to pass through the bed with rotary packing whatever the device (FIGS. 1 to 4). .
- said stream A3 can be recovered in gaseous form via said first outlet 9a of the rotary packed bed 2a (ie said stream A3 will be the gas flow 6) or via said fourth outlet 11b of the rotary packed bed 2b (ie said flow A3 will be said liquid flow 12).
- the speed of said one or more rotary-lined bed (s) 2 is from 100 to 3000 rpm (revolutions per minute), advantageously from 200 to 2500 rpm, preferably from 500 to 2000 rpm.
- step iii) is carried out at a pressure of 2 to 200 bars absolute, preferably 5 to 100 bars absolute, more preferably 5 to 40 bars absolute, in particular 5 to 30 bars absolute bars.
- step iii) is carried out at a temperature of 20 ° C to 200 ° C, preferably from 30 ° C to 175 ° C, in particular from 40 ° C to 150 ° C.
- the temperature and pressure conditions depend on the constituents of said stream A2, that is to say of said hydrohalocarbon B present in the stream and on said at least one impurity present in said stream A2. Those skilled in the art will adapt, using their general knowledge, the temperature and pressure conditions.
- step iii) makes it possible to purify said stream A2 in order to obtain a stream A3 which comprises said hydrohalocarbon B and in which the content of said at least one impurity C is reduced with respect to the content of the latter.
- a stream A3 which comprises said hydrohalocarbon B and in which the content of said at least one impurity C is reduced with respect to the content of the latter.
- said stream A3 can be devoid of said at least one impurity C.
- Said stream A3 comprises said hydrohalocarbon B initially contained in said stream A2.
- said stream A3 comprises said hydrohalocarbon B selected from group B1 as defined above.
- said stream A3 comprises said hydrohalocarbon B selected from group B2 as defined above.
- said stream A3 comprises at least 20% by weight of said hydrohalocarbon B based on the total weight of said stream.
- said stream A3 comprises at least 22%, at least 24%, at least 26%, at least 28%, at least 30%, at least 32%, at least 34%, at least 36%, at least 38 %, at least 40%, at least 42%, at least 44%, at least 46%, at least 48%, at least 50%, at least 52%, at least 54%, at least 56%, at least 58 %, at least 60%, at least 62%, at least 64%, at least 66%, at least 68%, at least 70%, at least 72%, at least 74%, at least 76%, at least 78 %, at least 80%, at least 82%, at least 84%, at least 86%, at least 88%, at least 90%, at least 92%, at least 94%, at least 96%, at least 98 % by weight of said hydrohalocarbon B based on the total weight of said stream A3.
- said stream A3 comprises less than 80% by weight of said at least one impurity C based on the total weight of said stream.
- said stream A3 comprises several impurities C, the content mentioned above is that of all the impurities C included in said stream A3.
- said A3 flow comprises less than 78%, less than 76%, less than 74%, less than 72%, less than 70%, less than 68%, less than 66%, less than 64%, less than 62 %, less than 60%, less than 58%, less than 56%, less than 54%, less than 52%, less than 50%, less than 48%, less than 46%, less than 44%, less than 42 %, less than 40%, less than 38%, less than 36%, less than 34%, less than 32%, less than 30%, less than 28%, less than 26%, less than 24%, less than 22 %, less than 20%, less than 18%, less than 16%, less than 14%, less than 12%, less than 10%, less than 8%, less than 6%, less than 4%, less than 2 % by weight of said at least one (of) impurity (s) C based on the total weight of said stream A3.
- the content of said at least one (of) impurity (s) C in said stream A3 is less than the content of said at least one (of) impurity (s) C in said stream A2. More particularly, said stream A3 is devoid of said at least one (of) said impurity (s) C.
- the term “devoid of” used here corresponds to a content of less than 0.5%, advantageously less than 0.1%, preferably less than 0.01%, more preferably less than 0.001%, in particular less than 0.0001% by weight based on the total weight of said stream.
- said stream A3 can be additionally purified by techniques known to those skilled in the art (distillation, cold separation, absorption, adsorption).
- said stream A4 comprises said at least one (of) impurity (s) C as defined in the present application.
- said stream A4 comprises at least one impurity C selected from group C1 as defined above.
- said stream A4 comprises at least two impurities C selected from the group C1 as defined above.
- said stream A4 comprises at least three, advantageously at least four, preferably at least five, more preferably at least six, in particular at least seven, more particularly at least eight, preferably at least nine, preferably at least ten C impurities selected from the Cl group as defined above
- said stream A4 comprises said at least one (said) at least one, advantageously at least two, preferably at least three, more preferably at least four, in particular at least five, more particularly at least six, preferably at least seven , advantageously preferably at least eight, preferably at least nine, particularly preferably at least ten impurity (s) C selected from group C2 as defined above.
- said stream A4 comprises at least 20% by weight of said at least one (said) at least one, advantageously at least two, preferably at least three, more preferably at least four, in particular at least five, more particularly at least six , preferably at least seven, preferably at least eight, preferably at least nine, particularly preferably at least ten impurity (s) C on the basis of the total weight of said stream A4.
- said A4 flow comprises at least 22%, at least 24%, at least 26%, at least 28%, at least 30%, at least 32%, at least 34%, at least 36%, at least 38 %, at least 40%, at least 42%, at least 44%, at least 46%, at least 48%, at least 50%, at least 52%, at least 54%, at least 56%, at least 58 %, at least 60%, at least 62%, at least 64%, at least 66%, at least 68%, at least 70%, at least 72%, at least 74%, at least 76%, at least 78 %, at least 80%, at least 82%, at least 84%, at least 86%, at least 88%, at least 90%, at least 92%, at least 94%, at least 96%, at least 98 % by weight of said at least one (said) at least one, advantageously at least two, preferably at least three, more preferably at least four, in particular at least five, more particularly at least six, preferably at least seven,
- the present invention makes it possible to purify a stream comprising a hydrohalocarbon B as defined in the present application.
- said hydrohalocarbon B thus recovered can be used in processes for the production of other hydrofluorocarbon compounds or be used in applications such as blowing agents for the preparation of polyurethane or polystyrene foam, refrigerant compositions, water transfer compositions. heat.
- the said impurity (s) recovered in the stream A4 can also be upgraded in processes for the preparation of hydrofluorocarbon compounds or in refrigerant compositions or heat transfer compositions.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1909812A FR3100461B1 (fr) | 2019-09-06 | 2019-09-06 | Procédé de purification d’hydrofluorocarbures |
| PCT/EP2020/074781 WO2021043989A1 (fr) | 2019-09-06 | 2020-09-04 | Procédé de purification d'hydrofluorocarbures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4025314A1 true EP4025314A1 (fr) | 2022-07-13 |
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ID=68654767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20764418.8A Pending EP4025314A1 (fr) | 2019-09-06 | 2020-09-04 | Procédé de purification d'hydrofluorocarbures |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11918939B2 (fr) |
| EP (1) | EP4025314A1 (fr) |
| JP (1) | JP7591038B2 (fr) |
| CN (1) | CN114340753B (fr) |
| FR (1) | FR3100461B1 (fr) |
| WO (1) | WO2021043989A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20240018074A1 (en) * | 2022-07-14 | 2024-01-18 | Honeywell International Inc. | METHOD FOR REDUCING CHLOROFLUOROCARBON IMPURITIES IN THE MANUFACTURE OF TRANS-1,3,3,3-TETRAFLUOROPROPENE (HFO-1234ze(E)) |
| US12383846B2 (en) * | 2023-03-09 | 2025-08-12 | Schlumberger Technology Corporation | Method and design of multiple counterrotating unit reactor |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002314560A1 (en) * | 2001-07-06 | 2003-01-21 | Showa Denko K. K. | Method for purifying tetrachloroethylene and process for producing hydrofluorocarbons |
| US7897823B2 (en) * | 2004-10-29 | 2011-03-01 | E. I. Du Pont De Nemours And Company | Process for production of azeotrope compositions comprising hydrofluoroolefin and hydrogen fluoride and uses of said azeotrope compositions in separation processes |
| FR2901790A1 (fr) * | 2006-05-30 | 2007-12-07 | Arkema France | Procede de fabrication des hydrofluorocarbures |
| US8168837B2 (en) * | 2008-05-15 | 2012-05-01 | Honeywell International Inc. | Process for separating hydrogen fluoride from organic feedstocks |
| JP5477011B2 (ja) * | 2009-02-03 | 2014-04-23 | セントラル硝子株式会社 | (z)−1−クロロ−3,3,3−トリフルオロプロペンの精製方法 |
| US8741828B2 (en) * | 2011-02-23 | 2014-06-03 | Honeywell International Inc. | Azeotrope and azeotrope-like compositions useful for the production of haloolefins |
| EP2791093B1 (fr) | 2011-12-14 | 2017-10-04 | Arkema France | Procédé pour la préparation de 2,3,3,3-tétrafluoropropène |
| FR2986525B1 (fr) * | 2012-02-03 | 2014-02-14 | Arkema France | Procede de production de 2,3,3,3-tetrafluoropropene |
| FR3015478B1 (fr) * | 2013-12-19 | 2015-12-25 | Arkema France | Compositions azeotropiques a base de fluorure d'hydrogene et de z-3,3,3-trifluoro-1-chloropropene |
| US9987589B2 (en) | 2013-12-31 | 2018-06-05 | Hindustan Petroleum Corporation, LTD. | Rotating packed bed unit |
| EP3071309B1 (fr) | 2014-09-09 | 2018-10-03 | Hindustan Petroleum Corporation Ltd. | Ensemble lit à garnissage rotatif |
| JP6102984B2 (ja) * | 2015-05-29 | 2017-03-29 | ダイキン工業株式会社 | 含フッ素化合物の製造方法 |
| FR3046164B1 (fr) | 2015-12-23 | 2021-01-08 | Arkema France | Procede de production et de purification du 2,3,3,3-tetrafluoropropene. |
| EP4293005A3 (fr) * | 2017-01-31 | 2024-02-21 | Daikin Industries, Ltd. | Procédé de production d'hydrocarbure fluorohalogéné |
| FR3064628B1 (fr) * | 2017-03-28 | 2019-04-05 | Arkema France | Procede de production et de purification du 2,3,3,3-tetrafluoropropene |
-
2019
- 2019-09-06 FR FR1909812A patent/FR3100461B1/fr active Active
-
2020
- 2020-09-04 US US17/639,357 patent/US11918939B2/en active Active
- 2020-09-04 EP EP20764418.8A patent/EP4025314A1/fr active Pending
- 2020-09-04 WO PCT/EP2020/074781 patent/WO2021043989A1/fr not_active Ceased
- 2020-09-04 CN CN202080062309.7A patent/CN114340753B/zh active Active
- 2020-09-04 JP JP2022514683A patent/JP7591038B2/ja active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP7591038B2 (ja) | 2024-11-27 |
| US11918939B2 (en) | 2024-03-05 |
| FR3100461A1 (fr) | 2021-03-12 |
| CN114340753B (zh) | 2023-10-20 |
| WO2021043989A1 (fr) | 2021-03-11 |
| FR3100461B1 (fr) | 2021-09-03 |
| US20220297025A1 (en) | 2022-09-22 |
| JP2022546725A (ja) | 2022-11-07 |
| CN114340753A (zh) | 2022-04-12 |
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