WO2020171177A1 - 1,1,2-トリフルオロエタン(hfc-143)の製造方法 - Google Patents
1,1,2-トリフルオロエタン(hfc-143)の製造方法 Download PDFInfo
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- WO2020171177A1 WO2020171177A1 PCT/JP2020/006873 JP2020006873W WO2020171177A1 WO 2020171177 A1 WO2020171177 A1 WO 2020171177A1 JP 2020006873 W JP2020006873 W JP 2020006873W WO 2020171177 A1 WO2020171177 A1 WO 2020171177A1
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/18—Arsenic, antimony or bismuth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/26—Chromium
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/25—Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons
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- 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
Definitions
- the present disclosure relates to a method for producing 1,1,2-trifluoroethane (HFC-143).
- HFC-143 Fluoroethane represented by 1,1,2-trifluoroethane (CHF 2 CH 2 F; hereinafter referred to as “HFC-143”) is known as a raw material for producing various refrigerants.
- HFC-143 is known as a raw material for 1,2-difluoroethylene (HFO-1132).
- Patent Document 1 proposes a technique for producing HFC-143 by a hydrogenation reaction of chlorotrifluoroethylene (CTFE) or the like in the presence of a hydrogenation catalyst.
- Patent Document 2 discloses a technique for producing 2-chloro-1,1-difluoroethane (HCFC-142) from 1,1,2-trichloroethane (HCC-140), and HFC is used as a by-product. It is described that a small amount of -143 is mixed.
- Patent Document 2 discloses a method for producing HCFC-142, and the selectivity of HFC-143, which is present in a trace amount as a by-product, in organic substances is as small as 1.9%.
- the present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide a method for producing HFC-143, which is a target product, at low cost and more efficiently than conventional methods.
- a method for producing 1,1,2-trifluoroethane comprising: 1,1,2-Trichloroethane (HCC-140), 1,2-Dichloro-1-fluoroethane (HCFC-141), 1,1-Dichloro-2-fluoroethane (HCFC-141a), (E,Z) At least one selected from the group consisting of -1,2-dichloroethylene (HCO-1130(E,Z)) and (E,Z)-1-chloro-2-fluoroethylene (HCFO-1131(E,Z))
- a method for producing HFC-143 comprising the step of carrying out one or more fluorination reactions by contacting the chlorine-containing compound of 1 with hydrogen fluoride to obtain a reaction gas containing HFC-143, hydrogen chloride and hydrogen fluoride.
- the method has a step of subjecting 1,1,2-trifluoroethane (HFC-143) contained in the reaction gas obtained by the production method according to any one of the above items 1 to 10 to a dehydrofluorination reaction, A method for producing 2-difluoroethylene (HFO-1132).
- the method for producing HFC-143 of the present disclosure includes 1,1,2-trichloroethane (HCC-140), 1,2-dichloro-1-fluoroethane (HCFC-141), and 1,1-dichloro-2-fluoroethane.
- HCC-140 1,1,2-trichloroethane
- HCFC-141a 1,2-dichloro-1-fluoroethane
- HCFO-1131(E,Z) 1,1-dichloro-2-fluoroethane.
- a raw material compound at least one selected from the group consisting of HCC-140, HCFC-141, HCFC-141a, HCO-1130(E,Z) and HCFO-1131(E,Z). Chlorine compounds are used.
- the said (E, Z) means including an E body and/or a Z body. Since all of these chlorine-containing compounds are available at a lower cost than CTFE, the cost of the method for producing HFC-143 can be reduced.
- at least one of HCC-140 and HCO-1130(E,Z) is preferable from the viewpoint of raw material cost.
- the production method of the present disclosure includes a step of carrying out one or more fluorination reactions by contacting the above chlorine-containing compound with hydrogen fluoride to obtain a reaction gas containing HFC-143, hydrogen chloride and hydrogen fluoride. Is characterized by.
- the fluorination reaction with hydrogen fluoride may be a gas phase reaction or a liquid phase reaction. Further, the number of fluorination reactions required to obtain HFC-143 may be one or two or more depending on the chlorine-containing compound used.
- the chlorine-containing compound and hydrogen fluoride can be brought into contact with each other in a gas state in the reaction temperature region described later, and the chlorine-containing compound may be in a liquid state when the chlorine-containing compound is supplied.
- the chlorine-containing compound when the chlorine-containing compound is liquid at room temperature and pressure, the chlorine-containing compound is vaporized using a vaporizer, then passed through a preheating region, and then supplied to a mixing region where it is brought into contact with hydrogen fluoride.
- the reaction can be carried out in the gas phase.
- the chlorine-containing compound may be supplied to the reaction device in a liquid state, and when it reaches a reaction region with hydrogen fluoride, it may be vaporized and reacted.
- hydrogen fluoride it is preferable to use anhydrous hydrogen fluoride because it can suppress corrosion of the reactor and deterioration of the catalyst.
- the method for vaporizing the chlorine-containing compound in the reaction region is not particularly limited, and known methods can be widely adopted.
- a material having good thermal conductivity such as nickel beads and hastelloy pieces, which has no catalytic activity in the fluorination reaction, and which is stable to hydrogen fluoride is filled in the reaction tube to improve the temperature distribution in the reaction tube. It may be made uniform and heated to a temperature above the vaporization temperature of the chlorine-containing compound, and the chlorine-containing compound in a liquid state is supplied thereto to be vaporized to be in a vapor phase state.
- the method of supplying hydrogen fluoride to the reactor is not particularly limited, and examples thereof include a method of supplying it to the reactor in a gas phase together with a chlorine-containing compound.
- the supply amount of hydrogen fluoride it is preferable that the molar ratio of hydrogen fluoride to the chlorine-containing compound (1 mol) is 20 or more, preferably 30 or more, and more preferably 40 or more (particularly more than 40).
- the upper limit of the molar ratio is not limited, it is preferably about 60 from the viewpoint of energy cost and productivity.
- the chlorine-containing compound as a raw material compound may be supplied to the reactor as it is, or may be diluted with an inert gas such as nitrogen, helium or argon and supplied.
- gas phase fluorination catalysts can be widely adopted and there is no particular limitation.
- chromium, aluminum, cobalt, manganese, nickel, and iron oxides, hydroxides, halides, halogen oxides, inorganic salts, and mixtures thereof can be mentioned.
- CrO 2 , Cr 2 O 3 , FeCl 3 /C, Cr 2 O 3 /Al 2 O 3 , Cr 2 O 3 /AlF 3 , Cr 2 O are used.
- a chromium-based catalyst such as 3 /C or CoCl 2 /Cr 2 O 3 .
- Chromium oxide/aluminum oxide based catalysts are those described in US Pat. No. 5,155,082, namely chromium oxide/aluminum oxide catalysts (eg Cr 2 O 3 /Al 2 O 3 ) and cobalt,
- a composite of nickel, manganese, rhodium, and ruthenium halides can be preferably used. That is, in the case of the gas phase reaction, it is preferable that at least a part thereof is a chromium-based catalyst.
- the catalyst metal may be partially or wholly crystallized, or may be amorphous, and the crystallinity can be appropriately selected.
- chromium oxide is commercially available in various particle sizes. Further, in order to control the particle size and crystallinity, it may be prepared by precipitating chromium hydroxide from chromium nitrate and ammonia and then calcining it.
- the above catalysts may be used alone or in a mixture thereof.
- As the carrier various activated carbons, magnesium oxide, zirconia oxide, alumina and the like can be used.
- These catalysts may be subjected to a fluorination treatment using hydrofluoric acid anhydride, a fluorine-containing compound or the like before being used in the fluorination reaction, and it is particularly preferable to perform the fluorination treatment with a hydrofluoric acid anhydride.
- the form of the reactor used is not particularly limited, and known reactors can be widely used.
- a tubular flow reactor filled with a catalyst can be used.
- a catalyst for example, an adiabatic reactor in an empty column, a porous or non-porous metal for improving the gas phase mixed state of hydrogen fluoride and a starting material, or An adiabatic reactor filled with a medium may be used.
- the relationship between the flow rate of a chlorine-containing compound and the inner diameter of the reaction tube is large linear velocity and heat transfer It is preferable to increase the area.
- the reaction temperature in the gas phase fluorination reaction is preferably 150 to 600° C., more preferably 200 to 500° C., and further preferably 230 to 400° C. as the temperature in the reactor.
- the reaction temperature is preferably 150 to 600° C., more preferably 200 to 500° C., and further preferably 230 to 400° C. as the temperature in the reactor.
- the selectivity of the target substance can be improved.
- the reaction temperature is set to 600° C. or lower, the risk that the carbide is generated by the reaction and the carbide adheres to and/or accumulates on the reaction tube wall or the filler to gradually block the reactor is reduced. can do. However, if such a risk is assumed, remove the carbides remaining in the reaction tube by entraining oxygen in the reaction system or by once stopping the reaction and circulating oxygen or air. You can
- the reaction pressure in the gas phase fluorination reaction is not particularly limited as long as it is a pressure at which the chlorine-containing compound and hydrogen fluoride can exist in a gas phase state, and it may be under normal pressure, under pressure, or under reduced pressure. ..
- it can be carried out under reduced pressure or atmospheric pressure (0 MPaG), and can also be carried out under pressure to such an extent that the raw material does not become liquid.
- the pressure condition is preferably in the range of 0 to 2 MPaG, more preferably in the range of 0 to 1 MPaG.
- the reaction time in the gas phase fluorination reaction is not particularly limited, but usually the catalyst filling amount W with respect to the total flow rate Fo (flow rate at 0° C. and 0.0 MPaG: cc/sec) of the raw material gas flowing into the reaction system.
- the contact time represented by W/Fo may be about 0.1 to 100 g ⁇ sec/cc, preferably about 5 to 50 g ⁇ sec/cc.
- the total flow rate of the raw material gas in this case is the total flow rate of the chlorine-containing compound and hydrogen fluoride used as the raw material, and when an inert gas, oxygen, or the like is used, the total flow rate of these gases is added. is there.
- liquid phase fluorination catalysts when the fluorination reaction is carried out in the liquid phase in the presence of a catalyst, known liquid phase fluorination catalysts can be widely adopted and there is no particular limitation. Specifically, one or more selected from the group consisting of a Lewis acid, a transition metal halide, a transition metal oxide, a group IVb metal halide, and a group Vb metal halide can be used.
- antimony halide tin halide, tantalum halide, titanium halide, niobium halide, molybdenum halide, iron halide, chromium fluoride halide, and chromium fluoride oxide.
- One or more selected may be used.
- a catalyst such as (6-y) F y , FeCl (3-y) F y (where y is 0.1 or more as a lower limit and is not more than the valence of each element as an upper limit) is preferable. .. These catalysts may be used alone or in combination of two or more. Among these, it is preferable that at least a part is an antimony-based catalyst, and antimony pentachloride is particularly preferable.
- these catalysts become inactive, they can be easily regenerated by known methods.
- a method of regenerating the catalyst a method of bringing chlorine into contact with the catalyst can be adopted. For example, per 100 g of liquid phase fluorination catalyst, about 0.15 to 25 g/hr of chlorine can be added to the liquid phase reaction.
- the reaction temperature in the liquid phase fluorination reaction is preferably 50 to 200° C., more preferably 80 to 150° C., as the temperature in the reaction system. By setting the reaction temperature to 80° C. or higher, the selectivity and productivity of the target product can be improved.
- the pressure in the liquid phase fluorination reaction is preferably in the range of 0 to 2 MPaG, more preferably in the range of 0 to 1 MPaG, as in the case of the gas phase reaction.
- reactors For both the fluorination reaction in the gas phase and the fluorination reaction in the liquid phase, known reactors can be widely used, and there is no particular limitation. Specifically, it is preferable to use a material made of a material that is resistant to the corrosive action of hydrogen fluoride, such as Hastelloy, Inconel, Monel, and Incolloy.
- HFC-143 After obtaining the reaction gas containing HFC-143, hydrogen chloride and hydrogen fluoride by the production method of the present disclosure, HFC-143 can be obtained by various known separation methods. Hydrogen fluoride can also be recycled to the fluorination reaction. Further, the obtained HFC-143 can be used for various purposes after being subjected to a purification treatment if necessary. For example, HFC-143 may be subjected to a dehydrofluorination reaction to produce 1,2-difluoroethylene (HFO-1132).
- the present disclosure has a step of subjecting 1,1,2-trifluoroethane (HFC-143) contained in the reaction gas obtained by the above-described production method of the present disclosure to a dehydrofluorination reaction, It also includes the invention of a method for producing 2-difluoroethylene (HFO-1132).
- the method for producing HFO-1132 is as follows: "After performing the production method of the present disclosure, 1,1,2-trifluoroethane (HFC-143) contained in the obtained reaction gas is subjected to a dehydrofluorination reaction. A method for producing 1,2-difluoroethylene (HFO-1132), which comprises steps.”
- Example 1 A chromium oxide fluoride catalyst was prepared by the following procedure. First, chromium oxide represented by CrxOy was prepared according to the method described in JP-A-5-146680. Specifically, 10% ammonia water was added to 765 g of a 5.7% chromium nitrate aqueous solution, and the resulting precipitate was collected by filtration and washed, and then dried in air at 120° C. for 12 hours to remove chromium hydroxide. Obtained. The chromium hydroxide was formed into pellets having a diameter of 3.0 mm and a height of 3.0 mm. The pellets were fired in a nitrogen stream at 400° C. for 2 hours to obtain chromium oxide.
- chromium oxide represented by CrxOy was prepared according to the method described in JP-A-5-146680. Specifically, 10% ammonia water was added to 765 g of a 5.7% chromium nitrate aqueous solution, and the resulting precipitate was
- the specific surface area (according to the BET method) of the obtained chromium oxide was about 200 m 2 /g.
- this chromium oxide was fluorinated to obtain a chromium oxide fluoride catalyst. Specifically, a gas containing hydrogen fluoride is circulated in chromium oxide to heat it while gradually increasing the temperature from 200 to 360° C., and after reaching 360° C., fluorination with hydrogen fluoride is performed for 2 hours to form an oxide fluoride. A chromium oxide catalyst was obtained.
- This reaction tube was maintained at 150° C. under atmospheric pressure (0.0 MPaG), and anhydrous hydrogen fluoride (HF) gas was supplied to the reactor at a flow rate of 118 mL/min (0° C., flow rate at 0.0 MPaG). Maintained for 1 hour. Then, CHCl 2 CH 2 Cl (HCC-140) was supplied at a flow rate of 2.4 mL/min (gas flow rate at 0° C. and 0.0 MPaG). At this time, the molar ratio of HF:HCC-140 was 50:1, and the contact time W/Fo was 6 g ⁇ sec/cc.
- HF hydrogen fluoride
- Example 2 HFC-143 was synthesized in the same manner as in Example 1 except that the reaction temperature was 240°C.
- Example 3 HFC-143 was synthesized in the same manner as in Example 1 except that the reaction temperature was 280°C.
- Example 4 HFC-143 was synthesized in the same manner as in Example 1 except that the reaction temperature was 330°C.
- Example 5 Anhydrous hydrogen fluoride (HF) gas was supplied to the reactor at a flow rate of 57.4 mL/min (0° C., flow rate at 0.0 MPaG) and the reaction temperature was set to 200° C. in the same manner as in Example 1. To synthesize HFC-143. At this time, the molar ratio of HF:HCC-140 was 24.3:1, and the contact time W/Fo was 12 g ⁇ sec/cc.
- HF hydrogen fluoride
- Example 6 HFC-143 was synthesized in the same manner as in Example 5 except that the reaction temperature was 240°C.
- Example 7 HFC-143 was synthesized in the same manner as in Example 5 except that the reaction temperature was 280°C.
- Example 8 Anhydrous hydrogen fluoride (HF) gas was supplied to the reactor at a flow rate of 35 mL/min (0° C., flow rate at 0.0 MPaG), and the reaction temperature was 280° C. -143 was synthesized. At this time, the molar ratio of HF:HCC-140 was 15:1, and the contact time W/Fo was 19 g ⁇ sec/cc.
- HF hydrogen fluoride
- the molar ratio of HFC-143 was set to 20 or more, preferably 40 or more (particularly more than 40). It can be seen that the yield is improved.
- Example 9 HFC-143 was synthesized in the same manner as in Example 8 except that the reaction temperature was 365°C.
- Example 10 12 g of the chromium oxide fluoride catalyst prepared in Example 1 was charged into a tubular Hastelloy reactor having an inner diameter of 15 mm and a length of 1 m.
- This reaction tube was maintained at 240° C. under atmospheric pressure (0.0 MPaG), and anhydrous hydrogen fluoride (HF) gas was supplied to the reactor at a flow rate of 63 mL/min (0° C., flow rate at 0.0 MPaG). Maintained for 1 hour. Then, CHClCHCl (HCO-1130) was supplied at a flow rate of 3 mL/min (0° C., gas flow rate at 0.0 MPaG). At this time, the molar ratio of HF:HCO-1130 was 21:1, and the contact time W/Fo was 11 g ⁇ sec/cc.
- HF hydrogen fluoride
- Example 11 Anhydrous hydrogen fluoride (HF) gas at a flow rate of 61.9 mL/min (flow rate at 0° C. and 0.0 MPaG) and HCO-1130 at 4.1 mL/min (gas flow rate at 0° C. and 0.0 MPaG) HFC-143 was synthesized in the same manner as in Example 10 except that each was fed to the reactor. At this time, the molar ratio of HF:HCO-1130 was 15:1, and the contact time W/Fo was 11 g ⁇ sec/cc.
- HF hydrogen fluoride
- Example 12 Anhydrous hydrogen fluoride (HF) gas at a flow rate of 64.7 mL/min (flow rate at 0° C., 0.0 MPaG) and HCO-1130 at 1.3 mL/min (gas flow rate at 0° C., 0.0 MPaG) HFC-143 was synthesized in the same manner as in Example 10 except that each was fed to the reactor. At this time, the molar ratio of HF:HCO-1130 was 50:1, and the contact time W/Fo was 11 g ⁇ sec/cc.
- HF hydrogen fluoride
- the yield of HFC-143 decreased due to the low molar ratio, so the molar ratio was 20 or more, preferably 40. It can be seen that the yield of HFC-143 is improved by the above (especially over 40).
- Example 13 Anhydrous hydrogen fluoride (HF) gas was introduced into the reactor at a flow rate of 150 mL/min (0°C, flow rate at 0.0 MPaG) and HCO-1130 at a flow rate of 3 mL/min (gas flow rate at 0°C, 0.0 MPaG), respectively.
- HFC-143 was synthesized in the same manner as Example 10 except that the reaction pressure was 0.6 MPaG and the reaction temperature was 200° C. At this time, the molar ratio of HF:HCO-1130 was 50:1, and the contact time W/Fo was 4.7 g ⁇ sec/cc.
- Example 14 HFC-143 was synthesized in the same manner as in Example 13 except that the reaction pressure was 0.0 MPaG.
- Example 15 The conditions shown in Example 14 were accompanied by 1% O 2 with respect to the total flow rate.
- Example 16 HFC-143 was synthesized in the same manner as in Example 15 except that the reaction temperature was 260°C.
- Example 17 HFC-143 was synthesized in the same manner as in Example 15 except that the reaction temperature was 280°C.
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Abstract
Description
1.1,1,2-トリフルオロエタン(HFC-143)の製造方法であって、
1,1,2-トリクロロエタン(HCC-140)、1,2-ジクロロ-1-フルオロエタン(HCFC-141)、1,1-ジクロロ-2-フルオロエタン(HCFC-141a)、(E,Z)-1,2-ジクロロエチレン(HCO-1130(E,Z))及び(E,Z)-1-クロロ-2-フルオロエチレン(HCFO-1131(E,Z))からなる群から選択される少なくとも一種の含塩素化合物をフッ化水素と接触させることにより1以上のフッ素化反応を行う工程を含み、HFC-143、塩化水素及びフッ化水素を含む反応ガスを得る、HFC-143の製造方法。
2.前記フッ素化反応は、0~2MPaGの圧力条件で行う、上記項1に記載の製造方法。
3.前記フッ素化反応は、触媒存在下、気相で行う、上記項1又は2に記載の製造方法。
4.前記フッ素化反応は、150~600℃の温度条件で行う、上記項3に記載の製造方法。
5.前記フッ素化反応における前記含塩素化合物と前記フッ化水素との接触時間W/Foが0.1~100g・sec/ccである、上記項3又は4に記載の製造方法。
6.前記フッ素化反応における前記含塩素化合物に対する前記フッ化水素のモル比が20以上である、上記項1~5のいずれかに記載の製造方法。
7.前記フッ素化反応における前記含塩素化合物に対する前記フッ化水素のモル比が40超過である、上記項1~5のいずれかに記載の製造方法。
8.前記触媒は、少なくとも一部がクロム系触媒である、上記項3~7のいずれかに記載の製造方法。
9.前記フッ素化反応は、触媒存在下、液相で行う、上記項1又は2に記載の製造方法。
10.前記触媒は、少なくとも一部がアンチモン系触媒である、上記項9に記載の製造方法。
11.上記項1~10のいずれかに記載の製造方法により得た前記反応ガスに含まれる1,1,2-トリフルオロエタン(HFC-143)を脱フッ化水素反応に供する工程を有する、1,2-ジフルオロエチレン(HFO-1132)の製造方法。
酸化フッ化クロム触媒を下記手順により調製した。先ず特開平5-146680号公報に記載されている方法に沿ってCrxOyで示される酸化クロムを調製した。詳細には、5.7%硝酸クロム水溶液765gに10%アンモニア水を加え、これにより生じた沈殿をろ過により回収して洗浄した後、空気中で120℃、12時間乾燥させて水酸化クロムを得た。この水酸化クロムを直径3.0mm、高さ3.0mmのペレット状に成形した。このペレットを窒素気流中400℃で2時間焼成して酸化クロムを得た。得られた酸化クロムの比表面積(BET法による)は約200m2/gであった。次に、この酸化クロムにフッ素化処理を施して酸化フッ化クロム触媒を得た。詳細には、酸化クロムにフッ化水素を含むガスを流通させて200~360℃まで段階的に温度を上げながら加熱し、360℃に到達した後、フッ化水素により2時間フッ素化して酸化フッ化クロム触媒を得た。
反応温度を240℃にした以外は実施例1と同様にしてHFC-143を合成した。
反応温度を280℃にした以外は実施例1と同様にしてHFC-143を合成した。
反応温度を330℃にした以外は実施例1と同様にしてHFC-143を合成した。
無水フッ化水素(HF)ガスを57.4mL/min(0℃、0.0MPaGでの流量)の流速で反応器に供給し、反応温度を200℃にしたこと以外は実施例1と同様にしてHFC-143を合成した。この時のHF:HCC-140のモル比は24.3:1、接触時間W/Foは12g・sec/ccであった。
反応温度を240℃にした以外は実施例5と同様にしてHFC-143を合成した。
反応温度を280℃にした以外は実施例5と同様にしてHFC-143を合成した。
無水フッ化水素(HF)ガスを35mL/min(0℃、0.0MPaGでの流量)の流速で反応器に供給し、反応温度を280℃にしたこと以外は実施例1と同様にしてHFC-143を合成した。この時のHF:HCC-140のモル比は15:1、接触時間W/Foは19g・sec/ccであった。
反応温度を365℃にした以外は実施例8と同様にしてHFC-143を合成した。
実施例1で調製した酸化フッ化クロム触媒12gを、内径15mm、長さ1mの管状ハステロイ製反応器に充填した。
無水フッ化水素(HF)ガスを61.9mL/min(0℃、0.0MPaGでの流量)、HCO-1130を4.1mL/min(0℃、0.0MPaGでのガス流量)の流速でそれぞれ反応器に供給したこと以外は実施例10と同様にしてHFC-143を合成した。この時のHF:HCO-1130のモル比は15:1、接触時間W/Foは11g・sec/ccであった。
無水フッ化水素(HF)ガスを64.7mL/min(0℃、0.0MPaGでの流量)、HCO-1130を1.3mL/min(0℃、0.0MPaGでのガス流量)の流速でそれぞれ反応器に供給したこと以外は実施例10と同様にしてHFC-143を合成した。この時のHF:HCO-1130のモル比は50:1、接触時間W/Foは11g・sec/ccであった。
無水フッ化水素(HF)ガスを150mL/min(0℃、0.0MPaGでの流量)、HCO-1130を3mL/min(0℃、0.0MPaGでのガス流量)の流速でそれぞれ反応器に供給し、反応圧力を0.6MPaG、反応温度を200℃としたこと以外は実施例10と同様にしてHFC-143を合成した。この時のHF:HCO-1130のモル比は50:1、接触時間W/Foは4.7g・sec/ccであった。
反応圧力を0.0MPaGとしたこと以外は実施例13と同様にしてHFC-143を合成した。
実施例14に示した条件に、全流量に対し1%のO2を同伴させた。
反応温度を260℃にした以外は実施例15と同様にしてHFC-143を合成した。
反応温度を280℃にした以外は実施例15と同様にしてHFC-143を合成した。
Claims (11)
- 1,1,2-トリフルオロエタン(HFC-143)の製造方法であって、
1,1,2-トリクロロエタン(HCC-140)、1,2-ジクロロ-1-フルオロエタン(HCFC-141)、1,1-ジクロロ-2-フルオロエタン(HCFC-141a)、(E,Z)-1,2-ジクロロエチレン(HCO-1130(E,Z))及び(E,Z)-1-クロロ-2-フルオロエチレン(HCFO-1131(E,Z))からなる群から選択される少なくとも一種の含塩素化合物をフッ化水素と接触させることにより1以上のフッ素化反応を行う工程を含み、HFC-143、塩化水素及びフッ化水素を含む反応ガスを得る、HFC-143の製造方法。 - 前記フッ素化反応は、0~2MPaGの圧力条件で行う、請求項1に記載の製造方法。
- 前記フッ素化反応は、触媒存在下、気相で行う、請求項1又は2に記載の製造方法。
- 前記フッ素化反応は、150~600℃の温度条件で行う、請求項3に記載の製造方法。
- 前記フッ素化反応における前記含塩素化合物と前記フッ化水素との接触時間W/Foが0.1~100g・sec/ccである、請求項3又は4に記載の製造方法。
- 前記フッ素化反応における前記含塩素化合物に対する前記フッ化水素のモル比が20以上である、請求項1~5のいずれかに記載の製造方法。
- 前記フッ素化反応における前記含塩素化合物に対する前記フッ化水素のモル比が40超過である、請求項1~5のいずれかに記載の製造方法。
- 前記触媒は、少なくとも一部がクロム系触媒である、請求項3~7のいずれかに記載の製造方法。
- 前記フッ素化反応は、触媒存在下、液相で行う、請求項1又は2に記載の製造方法。
- 前記触媒は、少なくとも一部がアンチモン系触媒である、請求項9に記載の製造方法。
- 請求項1~10のいずれかに記載の製造方法により得た前記反応ガスに含まれる1,1,2-トリフルオロエタン(HFC-143)を脱フッ化水素反応に供する工程を有する、1,2-ジフルオロエチレン(HFO-1132)の製造方法。
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| EP20758587.8A EP3851431B1 (en) | 2019-02-22 | 2020-02-20 | Method for producing 1,1,2-trifluoroethane (hfc-143) |
| US17/227,601 US11312673B2 (en) | 2019-02-22 | 2021-04-12 | Method for producing 1,1,2-trifluoroethane (HFC-143) |
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| JP7836010B2 (ja) * | 2024-07-31 | 2026-03-26 | ダイキン工業株式会社 | フルオロエタンの製造方法 |
| JP2026026019A (ja) * | 2024-07-31 | 2026-02-16 | ダイキン工業株式会社 | フルオロエタンの製造方法 |
| US20260062365A1 (en) * | 2024-08-29 | 2026-03-05 | Honeywell International Inc. | METHOD FOR PRODUCING trans-1,2-DIFLUOROETHYLENE (HFO-1132E) |
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| US11312673B2 (en) | 2022-04-26 |
| CN113498407B (zh) | 2024-10-18 |
| EP3851431A4 (en) | 2022-06-15 |
| JP6939830B2 (ja) | 2021-09-22 |
| US20210230086A1 (en) | 2021-07-29 |
| EP3851431B1 (en) | 2025-12-03 |
| EP3851431A1 (en) | 2021-07-21 |
| JP2020132593A (ja) | 2020-08-31 |
| CN113498407A (zh) | 2021-10-12 |
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