WO2022219870A1 - 白金族金属担持触媒カラムおよび炭素-炭素結合形成方法 - Google Patents
白金族金属担持触媒カラムおよび炭素-炭素結合形成方法 Download PDFInfo
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- WO2022219870A1 WO2022219870A1 PCT/JP2022/002273 JP2022002273W WO2022219870A1 WO 2022219870 A1 WO2022219870 A1 WO 2022219870A1 JP 2022002273 W JP2022002273 W JP 2022002273W WO 2022219870 A1 WO2022219870 A1 WO 2022219870A1
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- Prior art keywords
- platinum group
- group metal
- carbon
- supported catalyst
- ion exchanger
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 214
- 239000003054 catalyst Substances 0.000 title claims abstract description 152
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 72
- 239000002184 metal Substances 0.000 title claims abstract description 72
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- 238000000034 method Methods 0.000 title claims description 88
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- -1 platinum group metal complex ions Chemical class 0.000 claims abstract description 96
- 238000005342 ion exchange Methods 0.000 claims abstract description 84
- 238000006243 chemical reaction Methods 0.000 claims abstract description 79
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 18
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- 238000010485 C−C bond formation reaction Methods 0.000 claims description 24
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- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- CRGPNLUFHHUKCM-UHFFFAOYSA-M potassium phosphinate Chemical compound [K+].[O-]P=O CRGPNLUFHHUKCM-UHFFFAOYSA-M 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- MLICVSDCCDDWMD-KVVVOXFISA-M potassium;(z)-octadec-9-enoate Chemical compound [K+].CCCCCCCC\C=C/CCCCCCCC([O-])=O MLICVSDCCDDWMD-KVVVOXFISA-M 0.000 description 1
- CUQOHAYJWVTKDE-UHFFFAOYSA-N potassium;butan-1-olate Chemical compound [K+].CCCC[O-] CUQOHAYJWVTKDE-UHFFFAOYSA-N 0.000 description 1
- ZGJADVGJIVEEGF-UHFFFAOYSA-M potassium;phenoxide Chemical compound [K+].[O-]C1=CC=CC=C1 ZGJADVGJIVEEGF-UHFFFAOYSA-M 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- ZTILHLWDFSMCLZ-UHFFFAOYSA-N prop-2-enylhydrazine Chemical compound NNCC=C ZTILHLWDFSMCLZ-UHFFFAOYSA-N 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 125000002568 propynyl group Chemical group [*]C#CC([H])([H])[H] 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- 125000000714 pyrimidinyl group Chemical group 0.000 description 1
- 125000005493 quinolyl group Chemical group 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- SVOOVMQUISJERI-UHFFFAOYSA-K rhodium(3+);triacetate Chemical compound [Rh+3].CC([O-])=O.CC([O-])=O.CC([O-])=O SVOOVMQUISJERI-UHFFFAOYSA-K 0.000 description 1
- MMRXYMKDBFSWJR-UHFFFAOYSA-K rhodium(3+);tribromide Chemical compound [Br-].[Br-].[Br-].[Rh+3] MMRXYMKDBFSWJR-UHFFFAOYSA-K 0.000 description 1
- YWFDDXXMOPZFFM-UHFFFAOYSA-H rhodium(3+);trisulfate Chemical compound [Rh+3].[Rh+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O YWFDDXXMOPZFFM-UHFFFAOYSA-H 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- WYRXRHOISWEUST-UHFFFAOYSA-K ruthenium(3+);tribromide Chemical compound [Br-].[Br-].[Br-].[Ru+3] WYRXRHOISWEUST-UHFFFAOYSA-K 0.000 description 1
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 229960001790 sodium citrate Drugs 0.000 description 1
- 235000011083 sodium citrates Nutrition 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 235000011008 sodium phosphates Nutrition 0.000 description 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulphite Substances [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 1
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 description 1
- 229940035044 sorbitan monolaurate Drugs 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000004426 substituted alkynyl group Chemical group 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium group Chemical group [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- HIFJUMGIHIZEPX-UHFFFAOYSA-N sulfuric acid;sulfur trioxide Chemical compound O=S(=O)=O.OS(O)(=O)=O HIFJUMGIHIZEPX-UHFFFAOYSA-N 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- CALMYRPSSNRCFD-UHFFFAOYSA-J tetrachloroiridium Chemical compound Cl[Ir](Cl)(Cl)Cl CALMYRPSSNRCFD-UHFFFAOYSA-J 0.000 description 1
- 238000012719 thermal polymerization Methods 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical group CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- DANYXEHCMQHDNX-UHFFFAOYSA-K trichloroiridium Chemical compound Cl[Ir](Cl)Cl DANYXEHCMQHDNX-UHFFFAOYSA-K 0.000 description 1
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Classifications
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/30—Ion-exchange
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/30—Preparation of carboxylic acid nitriles by reactions not involving the formation of cyano groups
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- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
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- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/06—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
- B01J31/08—Ion-exchange resins
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/28—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of the platinum group metals, iron group metals or copper
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- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
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- B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/04—Processes using organic exchangers
- B01J41/07—Processes using organic exchangers in the weakly basic form
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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
- B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/08—Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/09—Organic material
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
- C07F5/027—Organoboranes and organoborohydrides
Definitions
- the present invention relates to a platinum group metal-supported catalyst column packed with a platinum group metal-supported catalyst, and a carbon-carbon bond forming method for carrying out a reaction to form a carbon-carbon bond using the platinum group metal-supported catalyst column.
- Carbon-carbon formation reactions using platinum group metals such as palladium as catalysts, typified by Suzuki-Miyaura coupling, Sonogashira coupling, and Mizorogi-Heck coupling, are used for pharmaceutical intermediates, organic EL, etc.
- platinum group metals such as palladium as catalysts
- Suzuki-Miyaura coupling Sonogashira coupling
- Mizorogi-Heck coupling are used for pharmaceutical intermediates, organic EL, etc.
- it has become more and more important in the synthesis process of high-performance materials.
- the above platinum group metal catalysts have often been used in a homogeneous system and have exhibited high catalytic activity, but there are problems such as the difficulty of recovering the catalyst and the contamination of the product with the metal that is the catalyst. rice field. Therefore, a heterogeneous catalyst has been developed in which the catalyst is supported on a carrier to facilitate the recovery of the catalyst and reduce the metal contamination of the product. - Methods for forming carbon bonds have also been developed.
- Patent Document 1 reports a method of continuously forming carbon-carbon bonds using a catalyst in which palladium is supported on a porous silica carrier, but does not disclose an actual reaction example.
- Patent Documents 2 and 3 disclose a method of forming a carbon-carbon bond using a catalyst in which a platinum group metal is supported on the wall surface of a microchannel having a width of 1 mm and a depth of 20 ⁇ m.
- water is not used as a solvent, and the reaction substrate solution is passed only at a flow rate of 1 ⁇ m / min, which poses problems in terms of environmental load and production efficiency. .
- Non-Patent Document 1 reports a method of continuously forming carbon-carbon bonds in a column filled with a catalyst in which palladium is supported on an organic carrier, but requires complex chemical transformations to obtain an organic carrier. In addition, although the reason is not clear, it is necessary to mix a large amount of diatomaceous earth when using a palladium-supported catalyst.
- the present inventors have developed a catalyst in which a platinum group metal is supported on a non-particulate organic ion exchanger having three-dimensionally continuous pores. It has been reported that it exhibits high catalytic activity in aqueous solvents in carbon-carbon bond forming reactions.
- Japanese Patent No. 5638862 Japanese Patent No. 5255215 JP 2008-212765 A JP 2014-015420 A JP 2016-190853 A
- An object of the present invention is a platinum group metal-supported catalyst column packed with a platinum group metal-supported catalyst capable of performing a carbon-carbon bond forming reaction in a high yield even in aromatic bromides, and the platinum group metal-supported catalyst column.
- the object of the present invention is to provide a carbon-carbon bond forming method for performing a reaction for forming a carbon-carbon bond using
- the present invention is a platinum group metal-supported catalyst column in which a platinum group metal-supported catalyst is packed in a packed container, wherein the platinum group metal-supported catalyst is an ion exchanger, platinum group metal nanoparticles, platinum group metal A platinum group metal-supported catalyst in which at least one of ions and platinum group metal complex ions is supported, wherein the ion exchanger consists of a continuous skeleton phase and a continuous pore phase, and the thickness of the continuous skeleton is 1 ⁇ 100 ⁇ m, the average diameter of the open pores is in the range of 1 to 1000 ⁇ m, the total pore volume is in the range of 0.5 to 50 mL/g, and the weight of ion exchange It is a non-particulate organic porous ion exchanger having a capacity in the range of 1 to 9 mg equivalent/g, ion exchange groups are distributed in the ion exchanger, and the platinum group metal nanoparticles and platinum group metal ions , and platinum group metal complex ions, the amount supported is in the
- the platinum group metal trapping material is preferably an ion exchanger.
- the ion exchanger consists of a continuous skeleton phase and a continuous pore phase, the thickness of the continuous skeleton is in the range of 1 to 100 ⁇ m, and the average diameter of the continuous pores is 1 ⁇ 1000 ⁇ m, the total pore volume ranges from 0.5 to 50 mL/g, the dry weight ion exchange capacity ranges from 1 to 9 mg equivalent/g, and the ion exchange It is preferably a non-particulate organic porous ion exchanger in which the groups are distributed throughout the ion exchanger.
- the present invention provides (1) a reaction between an aromatic halide and an organic boron compound, (2) a reaction between an aromatic halide and a compound having a terminal alkynyl group, or (3) a reaction between an aromatic halide and an alkenyl group.
- a carbon-carbon bond forming method in which a carbon-carbon bond forming reaction is performed by passing a liquid through the platinum group metal-supported catalyst column according to item 1 through an introduction route and discharging the reaction liquid through a discharge route. .
- the carbon-carbon bond forming reaction is preferably carried out in the presence of an inorganic base.
- the raw material solution (i), the raw material solution (ii), or the raw material solution (iii) is an inorganic base in which the raw material and the inorganic base are dissolved in water or a hydrophilic solvent.
- the raw material solution for dissolving an inorganic base which is a raw material solution for dissolution, is passed through the platinum group metal-supported catalyst column through an introduction channel, and the reaction solution is discharged through a discharge channel, thereby performing a carbon-carbon bond forming reaction. is preferred.
- the raw material solution (i), the raw material solution (ii), or the raw material solution (iii) is a hydrophobic solvent raw material solution in which raw materials are dissolved in a hydrophobic organic solvent.
- a mixture of the hydrophobic solvent raw material solution and the inorganic base aqueous solution in which the inorganic base is dissolved is passed through the platinum group metal-supported catalyst column through the introduction route, and the reaction solution is discharged through the discharge route. It is preferable to carry out a carbon-carbon bond forming reaction by
- a platinum group metal-supported catalyst column packed with a platinum group metal-supported catalyst capable of performing a carbon-carbon bond forming reaction with high yield even in aromatic bromides, and the platinum group metal-supported catalyst column. can be used to provide a carbon-carbon bond-forming method that performs a reaction to form a carbon-carbon bond.
- FIG. 4 is an SEM photograph of a first example monolith morphology
- FIG. FIG. 4 is an SEM photograph of a second example monolith morphology
- FIG. FIG. 11 is an SEM photograph of a third example monolith morphology
- FIG. 4 is a diagram obtained by transferring a skeleton portion appearing as a cross section of the SEM photograph of FIG. 3
- FIG. 4 is an SEM photograph of a fourth example monolith morphology
- FIG. FIG. 4B is a schematic diagram of the co-continuous structure of the fourth monolith.
- FIG. 10 is an SEM photograph of an example morphology of monolith intermediate (4).
- FIG. FIG. 4 is a schematic cross-sectional view of a projection;
- FIG. 10 is a SEM photograph of a morphological example of a monolith of No. 5-1.
- FIG. 1 is a SEM photograph of a monolithic intermediate obtained in Example 1.
- FIG. 1 is an SEM photograph of a monolith obtained in Example 1.
- FIG. 10 is a SEM photograph of a morphological example of a monolith of No. 5-1.
- FIG. 1 is a SEM photograph of a monolithic intermediate obtained in Example 1.
- FIG. 1 is an SEM photograph of a monolith obtained in Example 1.
- a platinum group metal-supported catalyst column is a platinum group metal-supported catalyst column in which a platinum group metal-supported catalyst is packed in a packed container.
- the supported platinum group metal catalyst is a supported platinum group metal catalyst in which at least one of platinum group metal nanoparticles, platinum group metal ions, and platinum group metal complex ions is supported on an ion exchanger.
- the ion exchanger consists of a continuous skeleton phase and a continuous pore phase, the thickness of the continuous skeleton is in the range of 1 to 100 ⁇ m, the average diameter of the continuous pores is in the range of 1 to 1000 ⁇ m, The total pore volume is in the range of 0.5 to 50 mL/g, the ion exchange capacity per weight in the dry state is in the range of 1 to 9 mg equivalent/g, and the ion exchange groups are in the ion exchanger. It is a distributed non-particulate organic porous ion exchanger.
- the supported amount of at least one of the platinum group metal nanoparticles, platinum group metal ions, and platinum group metal complex ions is 0.004 to 20% by weight in a dry state. Range.
- a platinum group metal scavenger is installed downstream of the platinum group metal-supported catalyst.
- platinum group metal nanoparticles, platinum group metal ions, and platinum group metal complex ions may be referred to as "platinum group metal or the like”.
- a platinum group metal-supported catalyst in which a platinum group metal or the like is supported on a non-particulate organic porous ion exchanger is provided with a platinum group metal scavenger in the latter stage of the platinum group metal-supported catalyst. It has been found that the use of a catalyst column increases the yield in so-called fixed-bed continuous-flow carbon-carbon bonding reactions, even when aromatic bromide is used as a starting material.
- Nonparticulate organic porous ion exchanger In the platinum group metal-supported catalyst used in the platinum group metal-supported catalyst column according to the present embodiment, the carrier on which the platinum group metal or the like is supported is a non-granular organic porous ion exchanger.
- the non-particulate organic porous ion exchanger is obtained by introducing ion exchange groups into a monolithic organic porous material having a continuous skeleton phase and a continuous pore phase.
- a monolithic organic porous body has a large number of communicating pores serving as channels between skeletons.
- monolithic organic porous material is simply referred to as “monolith”
- monolithic organic porous ion exchanger is simply referred to as “monolithic ion exchanger”.
- the “monolithic organic porous intermediate” which is the body (precursor) is also simply referred to as “monolithic intermediate”.
- the non-particulate organic porous ion exchanger consists of a continuous skeleton phase and a continuous pore phase, the thickness of the continuous skeleton is in the range of 1 to 100 ⁇ m, and the average diameter of the continuous pores is in the range of 1 to 1000 ⁇ m. , the total pore volume is in the range of 0.5 to 50 mL/g, the ion exchange capacity per weight in the dry state is in the range of 1 to 9 mg equivalent/g, and the ion exchange group is an organic porous distributed in the ion exchanger.
- a continuous skeleton phase and a continuous pore phase are observed by SEM images.
- the thickness of the continuous skeleton in the dry state of the non-particulate organic porous ion exchanger is in the range of 1 to 100 ⁇ m.
- the thickness of the continuous framework in the dry state of the non-particulate organic porous ion exchanger is determined by SEM observation. If the thickness of the continuous skeleton is less than 1 ⁇ m, the ion exchange capacity per unit volume may be reduced, or the mechanical strength may be reduced, and the platinum group metal-supported catalyst may be packed in a column and the reaction liquid may be passed through. In addition, the non-particulate organic porous ion exchanger may be deformed, especially when the liquid is passed at a high flow rate. If the thickness of the continuous skeleton exceeds 100 ⁇ m, the skeleton becomes too thick, and the pressure loss during passage of the raw material liquid may increase.
- the average diameter of continuous pores in the dry state of the non-particulate organic porous ion exchanger is in the range of 1 to 1000 ⁇ m.
- the average diameter of continuous pores in the dry state of the non-particulate organic porous ion exchanger is measured by mercury porosimetry and refers to the maximum value of the pore distribution curve obtained by mercury porosimetry. If the average diameter of the continuous pores is less than 1 ⁇ m, pressure loss may increase when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed through.
- the average diameter of the continuous pores exceeds 1000 ⁇ m, when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed through, the contact between the reaction solution and the monolithic ion exchanger becomes insufficient, resulting in catalytic activity. may decrease.
- the total pore volume in the dry state of the non-particulate organic porous ion exchanger is in the range of 0.5 to 50 mL/g.
- the total dry pore volume of the non-particulate organic porous ion exchanger is measured by mercury porosimetry. If the total pore volume is less than 0.5 mL/g, the pressure loss during the passage of the reaction liquid may become large when the platinum group metal-supported catalyst is packed in a column and the reaction liquid is passed. be.
- the ion exchange capacity per weight in the dry state of the non-particulate organic porous ion exchanger is in the range of 1 to 9 mg equivalent/g.
- the ion exchange capacity per unit weight of the non-particulate organic porous ion exchanger in a dry state is measured by a method such as neutralization titration or precipitation titration. If the ion exchange capacity is less than 1 mg equivalent/g, the amount of platinum group metal ions or platinum group metal complex ions that can be supported may decrease. If the ion exchange capacity exceeds 9 mg equivalent/g, the conditions for introducing reaction of ion exchange groups become severe, and oxidative deterioration of the monolith may proceed remarkably.
- the introduced ion exchange groups are preferably distributed not only on the surface of the monolith but also inside the skeleton of the monolith, that is, in the organic porous ion exchanger. , more preferably uniformly distributed.
- the ion-exchange groups are uniformly distributed in the organic porous ion-exchanger means that the ion-exchange groups are distributed on the surface and inside the skeleton of the organic porous ion-exchanger at least on the order of ⁇ m. point to The distribution of ion exchange groups is confirmed by using an electron probe microanalyzer (EPMA).
- EPMA electron probe microanalyzer
- the ion-exchange groups are distributed not only on the surface of the monolith but also on the inside of the monolith skeleton, the physical and chemical properties of the surface and inside of the monolith can be made almost uniform, which improves the resistance to swelling and shrinkage. do.
- the ion exchange groups introduced into the non-particulate organic porous ion exchanger are cation exchange groups or anion exchange groups.
- cation exchange groups include carboxylic acid groups, iminodiacetic acid groups, sulfonic acid groups, phosphoric acid groups, and phosphate ester groups.
- anion exchange groups include quaternary ammonium groups such as trimethylammonium group, triethylammonium group, tributylammonium group, dimethylhydroxyethylammonium group, dimethylhydroxypropylammonium group and methyldihydroxyethylammonium group, tertiary sulfonium groups and phosphonium groups. etc.
- the material that constitutes the continuous skeleton is an organic polymer material that has a crosslinked structure. It preferably contains 0.1 to 30 mol% of the crosslinked structural unit, more preferably 0.1 to 20 mol% of the crosslinked structural unit, based on the total structural units constituting the organic polymer material. preferable.
- organic polymer material is not particularly limited, and examples include aromatic vinyl polymers such as polystyrene, poly( ⁇ -methylstyrene), polyvinyltoluene, polyvinylbenzyl chloride, polyvinylbiphenyl, and polyvinylnaphthalene; polyolefins such as polyethylene and polypropylene; Poly (halogenated polyolefins) such as vinyl chloride and polytetrafluoroethylene; nitrile polymers such as polyacrylonitrile; coalescence is mentioned.
- first monolithic organic porous ion exchanger (monolithic ion exchanger) to fifth monolithic organic porous ion exchanger shown below Exchangers (monolithic ion exchangers) may be mentioned.
- first monolithic organic porous ion exchanger (monolithic ion exchanger)
- fifth monolithic organic porous ion exchanger shown below Exchangers (monolithic ion exchangers) may be mentioned.
- descriptions of the same configurations as those of the non-particulate organic porous ion exchanger are omitted.
- the first monolithic ion exchanger has a continuous macropore structure with interconnecting macropores and common openings (mesopores) in the walls of the macropores with an average diameter ranging from 1 to 1000 ⁇ m, and a total pore volume of 1 ⁇ 50 mL/g, the ion exchange capacity per weight in the dry state is in the range of 1 to 9 mg equivalent/g, and the ion exchange groups are distributed in the organic porous ion exchanger. It is an exchanger.
- the first monolithic ion exchanger is a continuous macropore structure with continuous macropores (pores), as shown in FIG.
- a first monolithic ion exchanger and its manufacturing method are disclosed in JP-A-2002-306976.
- the first monolithic ion exchanger has macropores connected to each other and common openings (mesopores) located in the walls of the macropores.
- Mesopores have overlapping portions where macropores overlap.
- the overlapping portion of the mesopores preferably has an average diameter of 1 to 1000 ⁇ m, more preferably 10 to 200 ⁇ m, even more preferably 20 to 200 ⁇ m in a dry state.
- the average diameter of the openings of the dry first monolith is measured by mercury porosimetry and refers to the maximum of the pore distribution curve obtained by mercury porosimetry.
- first monolithic ion exchangers have an open pore structure in which the voids formed by macropores and mesopores serve as channels. If the average diameter of the overlapping portions of the mesopores in the dry state is less than 1 ⁇ m, the pressure loss at the time of passing the reaction liquid through a column packed with the platinum group metal-supported catalyst becomes significantly large. may be lost. If the average diameter of the overlapping portions of the mesopores exceeds 1000 ⁇ m in a dry state, contact between the reaction liquid and the monolithic ion exchanger is insufficient when the platinum group metal-supported catalyst is packed in a column and the reaction liquid is passed through. As a result, the catalytic activity may decrease.
- the number of overlapping macropores is, for example, 1 to 12 per macropore, and 3 to 10 in most cases. Since the first monolithic ion exchanger has the above-described continuous macropore structure, it is possible to form a group of macropores and a group of common pores almost uniformly, as described in JP-A-8-252579. The pore volume and specific surface area can be remarkably increased compared to the particle aggregation type porous material.
- the ion exchange capacity per weight in the dry state is as described above. Further, "the ion exchange groups are distributed in the organic porous ion exchanger" is as described above.
- the first monolithic ion exchanger can be produced, for example, by the following method.
- a water-in-oil emulsion can be obtained by mixing an oil-soluble monomer containing no ion-exchange group, a surfactant, water, and optionally a polymerization initiator. This water-in-oil emulsion can then be polymerized to form a first monolith.
- the oil-soluble monomer containing no ion-exchange group used in the production of the first monolith refers to a monomer that contains no ion-exchange group, has low solubility in water, and is lipophilic.
- This monomer is, for example, styrene, ⁇ -methylstyrene, vinylbenzyl chloride, ethylene, propylene, vinyl chloride, vinyl bromide, acrylonitrile, methacrylonitrile, vinyl acetate, methyl acrylate, ethyl acrylate, 2-ethylhexyl acrylate.
- butanediol diacrylate methyl methacrylate, ethyl methacrylate, 2-ethylhexyl methacrylate, ethylene glycol dimethacrylate, and the like.
- These monomers can be used singly or in combination of two or more.
- a crosslinkable monomer such as divinylbenzene or ethylene glycol dimethacrylate is selected as at least one component of the oil-soluble monomer, and the content thereof is preferably in the range of, for example, 0.3 to 10 mol% of the total oil-soluble monomer.
- the range of 0.3 to 5 mol % is preferable in that the ion exchange groups can be quantitatively introduced in the subsequent step and sufficient mechanical strength for practical use can be ensured.
- the surfactant used in the production of the first monolith should be capable of forming a water-in-oil (W/O) emulsion when an oil-soluble monomer containing no ion-exchange group is mixed with water. , there are no particular restrictions.
- Surfactants include, for example, nonionic surfactants such as sorbitan monooleate, sorbitan monolaurate, polyoxyethylene nonylphenyl ether; anionic surfactants such as potassium oleate, sodium dodecylbenzene sulfonate, dioctyl sodium sulfosuccinate; active agents; cationic surfactants such as distearyldimethylammonium chloride; amphoteric surfactants such as lauryldimethylbetaine. These surfactants can be used singly or in combination of two or more.
- a water-in-oil emulsion refers to an emulsion in which an oil phase is a continuous phase and water droplets are dispersed therein.
- the amount of surfactant added may be, for example, in the range of about 2 to 70% of the total amount of the oil-soluble monomer and surfactant.
- Alcohols such as methanol and stearyl alcohol; carboxylic acids such as stearic acid; hydrocarbons such as octane, dodecane and toluene; cyclic ethers such as tetrahydrofuran and dioxane; You can also let
- a compound that generates radicals by heat and light irradiation is preferably used as the polymerization initiator that is optionally used when forming the monolith by polymerization.
- the polymerization initiator may be water-soluble or oil-soluble, and examples thereof include azobisisobutyronitrile, azobisdimethylvaleronitrile, azobiscyclohexanenitrile, azobiscyclohexanecarbonitrile, benzoyl peroxide, peroxide.
- Potassium sulfate ammonium persulfate, hydrogen peroxide-ferrous chloride, sodium persulfate-sodium acid sulfite, tetramethylthiuram disulfide and the like.
- polymerization proceeds only by heating or light irradiation without adding a polymerization initiator.
- the polymerization conditions for polymerizing the water-in-oil emulsion can be selected from various conditions depending on the type of monomer, initiator system, etc.
- azobisisobutyronitrile, benzoyl peroxide, potassium persulfate, or the like is used as the polymerization initiator, for example, in a sealed container under an inert atmosphere, for example, heating is performed at 30 to 100° C. for 1 to 48 hours. polymerize it.
- hydrogen peroxide-ferrous chloride, sodium persulfate-sodium sulfite, or the like is used as the polymerization initiator, polymerization is carried out, for example, at 0 to 30° C.
- Examples of methods for introducing ion exchange groups into the first monolith include the following methods (1) and (2).
- monomers that do not contain ion-exchange groups can be polymerized to form a first monolith and then introduced with ion-exchange groups;
- the method for introducing ion exchange groups into the first monolith is not particularly limited, and known methods such as polymer reaction and graft polymerization can be used.
- a method for introducing a quaternary ammonium group if the monolith is a styrene-divinylbenzene copolymer or the like, a method of introducing a chloromethyl group with chloromethyl methyl ether or the like and then reacting it with a tertiary amine; A method in which a monolith is produced by copolymerization of chloromethylstyrene and divinylbenzene and reacted with a tertiary amine to introduce; , N,N-trimethylammonium propylacrylamide; and similarly, a method of graft polymerizing glycidyl methacrylate and then introducing a quaternary ammonium group by functional group conversion.
- a method for introducing a sulfonic acid group if the monolith is a styrene-divinylbenzene copolymer, etc., chlorosulfuric acid, concentrated sulfuric acid, or fuming sulfuric acid is used to sulfonate the monolith; is introduced onto the skeleton surface and inside the skeleton, and sodium styrenesulfonate or acrylamide-2-methylpropanesulfonic acid is graft-polymerized; similarly, glycidyl methacrylate is graft-polymerized, and then a sulfonic acid group is introduced by functional group conversion. etc.
- organic polymer particles with an average particle size of 1 to 50 ⁇ m are aggregated to form a three-dimensionally continuous skeleton portion, and an average diameter of 20 to 100 ⁇ m is formed between the skeletons. It has three-dimensionally continuous pores, the total pore volume is in the range of 1 to 10 mL / g, and the ion exchange capacity per weight in a dry state is in the range of 1 to 9 mg equivalent / g.
- the second monolithic ion exchanger is a particle-aggregated structure in which particles are aggregated, as shown in FIG.
- a second monolithic ion exchanger and its manufacturing method are disclosed in JP-A-2009-007550.
- organic polymer particles having a crosslinked structural unit and having an average particle size in a dry state of preferably in the range of 1 to 50 ⁇ m, more preferably in the range of 1 to 30 ⁇ m are aggregated and three-dimensionally continuous. It has a skeletal part.
- the second monolithic ion exchanger has three-dimensionally continuous pores (continuous pores) having an average diameter in a dry state of preferably in the range of 20 to 100 ⁇ m, more preferably in the range of 20 to 90 ⁇ m between the continuous skeletons.
- a SEM photograph of an arbitrarily extracted portion of the cross section of the second monolithic ion exchanger in a dry state is taken, the diameters of the organic polymer particles of all particles in the SEM photograph are measured, and the average value thereof is calculated as the average particle diameter. and The average diameter of the continuous pores in the dry state is determined by the mercury porosimetry method as in the case of the first monolithic ion exchanger.
- the average particle size of the organic polymer particles is less than 1 ⁇ m in a dry state, the average diameter of continuous pores between skeletons may be as small as less than 20 ⁇ m in a dry state. If the average particle size of the organic polymer particles exceeds 50 ⁇ m, pressure loss may increase when the platinum group metal-supported catalyst is packed in a column and the reaction liquid is passed through the column. Further, when the average diameter of the continuous pores is less than 20 ⁇ m in a dry state, when the platinum group metal-supported catalyst is filled in the column and the reaction liquid is passed through, the pressure loss when the reaction liquid is passed through may become large.
- the total pore volume per weight of the second monolithic ion exchanger in a dry state is preferably in the range of 1 to 10 mL/g. If the total pore volume is less than 1 mL/g, pressure loss may increase when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed through. , the permeation amount per unit cross-sectional area becomes small, and the processing capacity may decrease. If the total pore volume exceeds 10 mL / g, the mechanical strength decreases, and when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed, the monolith may The ion exchanger may be deformed.
- the ion exchange capacity per weight in the dry state is as described above. Further, "the ion exchange groups are distributed in the organic porous ion exchanger" is as described above.
- the second monolithic ion exchanger can be produced, for example, by the following method.
- the vinyl monomer used for manufacturing the second monolith is the same as the monomer used for manufacturing the first monolith.
- the cross-linking agent used to produce the second monolith preferably contains at least two polymerizable vinyl groups in the molecule and has high solubility in organic solvents.
- Cross-linking agents are, for example, divinylbenzene, divinylbiphenyl, ethylene glycol dimethacrylate. These cross-linking agents can be used singly or in combination of two or more.
- Preferred cross-linking agents are aromatic polyvinyl compounds such as divinylbenzene, divinylnaphthalene, and divinylbiphenyl in terms of high mechanical strength and stability against hydrolysis.
- the amount of cross-linking agent used relative to the total amount of vinyl monomer and cross-linking agent is, for example, in the range of 1 to 5 mol %, preferably in the range of 1 to 4 mol %. is.
- the organic solvent used in the production of the second monolith dissolves the vinyl monomer and the cross-linking agent, but hardly dissolves the polymer produced by polymerizing the vinyl monomer.In other words, the polymer produced by polymerizing the vinyl monomer. It is a poor solvent for
- the organic solvent includes alcohols such as methanol, butanol and octanol; chain ethers such as diethyl ether and ethylene glycol dimethyl ether; chain saturated hydrocarbons such as hexane, octane and decane. etc.
- the polymerization initiator used to manufacture the second monolith is preferably a compound that generates radicals upon exposure to heat and light.
- the polymerization initiator is preferably oil-soluble.
- Polymerization initiators include, for example, 2,2′-azobis(isobutyronitrile), 2,2′-azobis(2,4-dimethylvaleronitrile), 2,2′-azobis(2-methylbutyronitrile) , 2,2′-azobis(4-methoxy-2,4-dimethylvaleronitrile), 2,2′-azobisdimethyl isobutyrate, 4,4′-azobis(4-cyanovaleric acid), 1,1′-azobis (cyclohexane-1-carbonitrile), benzoyl peroxide, lauroyl peroxide, potassium persulfate, ammonium persulfate, tetramethylthiuram disulfide and the like.
- the amount of polymerization initiator used relative to the total amount of vinyl monomer and cross-linking agent is, for example, in the range of about 0.01 to 5 mol %.
- polymerization initiators such as 2,2'-azobis(isobutyronitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), benzoyl peroxide, lauroyl peroxide
- potassium persulfate or the like it may be polymerized by heating at 30 to 100° C. for 1 to 48 hours, for example, in a sealed container under an inert atmosphere. After completion of the polymerization, the content is taken out and extracted with a solvent such as acetone for the purpose of removing the unreacted vinyl monomer and the organic solvent to obtain a second monolith.
- organic polymer particles with an average particle size of 1 to 50 ⁇ m can be aggregated by adjusting polymerization conditions such as increasing the amount of cross-linking agent, increasing the monomer concentration, and increasing the temperature.
- amount of the cross-linking agent used to the total amount of the vinyl monomer and the cross-linking agent can be set to a specific amount, three-dimensionally continuous pores having an average diameter of 20 to 100 ⁇ m can be formed between the skeletons.
- the amount of organic solvent used relative to the total amount of organic solvent, monomer and cross-linking agent used is, for example, in the range of 30 to 80% by weight, preferably By polymerizing under conditions such as the range of 40-70% by weight, the monolith can have a total pore volume of 1-5 mL/g.
- the method of introducing ion exchange groups into the second monolith is the same as the method of introducing ion exchange groups into the first monolith.
- a continuous pore has an overlapping portion where macropores overlap each other.
- the overlapping portion preferably has a dry average diameter of 30 to 300 ⁇ m, more preferably 30 to 200 ⁇ m, and even more preferably 40 to 100 ⁇ m. This average diameter is measured by mercury porosimetry and refers to the maximum value of the pore distribution curve obtained by mercury porosimetry. If the average diameter of the openings in a dry state is less than 30 ⁇ m, pressure loss may increase when the reaction solution is passed through a column filled with a platinum group metal-supported catalyst. , 300 ⁇ m, the contact between the reaction solution and the monolithic ion exchanger may be insufficient.
- the skeleton area appearing in the cross section is, for example, 25 to 50% of the image area, preferably It is in the range of 25-45%. If the area of the skeleton portion appearing in the cross section is less than 25% of the image area, the skeleton becomes thin and the mechanical strength is lowered, and when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed through, it is difficult. In particular, the monolithic ion exchanger may be deformed when the liquid is passed at a high flow rate. If the skeleton area appearing in the cross section exceeds 50% of the image area, the skeleton becomes too thick, and when the platinum group metal-supported catalyst is packed in a column and the reaction liquid is passed, the pressure at the time of liquid passage is Losses may increase.
- the conditions for obtaining the SEM image may be any conditions that clearly show the skeletal part appearing in the cross section of the cut surface, for example, a magnification of 100 to 600 and a photographic area of about 150 mm x 100 mm.
- the SEM observation is preferably performed using three or more images of different cut points and photographed points taken at arbitrary positions on arbitrary cut surfaces of the third monolithic ion exchanger, excluding subjectivity.
- the third monolithic ion exchanger that is cleaved is in a dry state.
- the skeletal portion of the cut surface in the SEM image will be described with reference to FIGS. 3 and 4. FIG. In FIGS.
- the total pore volume per weight of the third monolith ion exchanger in a dry state is preferably in the range of 0.5-10 mL/g, more preferably in the range of 0.8-8 mL/g. If the total pore volume is less than 0.5 mL/g, pressure loss may increase when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed through. Furthermore, the amount of permeating fluid per unit cross-sectional area becomes small, and the processing capacity may decrease. If the total pore volume exceeds 10 mL / g, the mechanical strength decreases, and when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed, the monolith may The ion exchanger may be deformed. Furthermore, the contact efficiency between the reaction liquid and the monolithic ion exchanger may decrease.
- the ion exchange capacity per weight in the dry state is as described above. Further, "the ion exchange groups are distributed in the organic porous ion exchanger" is as described above.
- a third monolithic ion exchanger can be produced, for example, by the following method.
- a water-in-oil emulsion is prepared by stirring a mixture of an oil-soluble monomer containing no ion-exchange groups, a surfactant, and water.
- a third monolith can be obtained by performing the following steps I, II, and III.
- a water-in-oil emulsion is polymerized to obtain, for example, a monolithic organic porous intermediate having a continuous macropore structure with a total pore volume in the range of 5 to 16 mL/g (hereinafter also referred to as monolith intermediate (3). ) can be obtained.
- step II a vinyl monomer, a cross-linking agent having at least two vinyl groups in one molecule, an organic solvent in which the vinyl monomer and the cross-linking agent are dissolved but the polymer produced by polymerization of the vinyl monomer is not dissolved, and a polymerization initiator.
- step III the mixture obtained in step II is allowed to stand and polymerized in the presence of the monolithic intermediate (3) obtained in step I to obtain a monolithic intermediate (3) having a thicker skeleton than that of the monolithic intermediate (3).
- a third monolith can be obtained.
- the I step is the same as the first monolithic ion exchanger manufacturing method.
- the monolithic intermediate (3) obtained in step I has a continuous macropore structure.
- a porous structure having a thick skeleton can be formed using the structure of the monolithic intermediate (3) as a mold.
- the crosslink density of the polymer material is, for example, in the range of 0.3 to 10 mol%, preferably in the range of 0.3 to 5 mol%, based on the total structural units constituting the polymer material of the monolithic intermediate (3). It preferably contains a structural unit.
- the total pore volume per unit weight of the monolithic intermediate (3) obtained in step I is, for example, in the range of 5-16 mL/g, preferably in the range of 6-16 mL/g.
- the ratio of monomer to water may be, for example, approximately in the range of 1:5 to 1:20.
- the average diameter of the openings ranges from 20 to 200 ⁇ m in a dry state, for example.
- step II a vinyl monomer, a cross-linking agent having at least two vinyl groups in one molecule, an organic solvent in which the vinyl monomer and the cross-linking agent are dissolved but the polymer produced by polymerization of the vinyl monomer is not dissolved, and a polymerization initiator. It is a step of preparing a mixture containing It should be noted that either step I or step II may be performed first.
- the vinyl monomer used in step II may be any lipophilic vinyl monomer that contains a polymerizable vinyl group in the molecule and is highly soluble in organic solvents. ) is preferably selected to produce a polymeric material of the same type or similar. Specific examples of these vinyl monomers are the same as the vinyl monomers used in the production of the first monolith.
- the amount of the vinyl monomer added in step II is, for example, 3 to 50 times, preferably 4 to 40 times, the weight of the monolithic intermediate (3) coexisting during polymerization.
- the cross-linking agent used in step II is the same as the cross-linking agent used in the production of the second monolith.
- the polymerization initiator used in step II is the same as the polymerization initiator used in the production of the second monolith.
- step III for example, the monolithic intermediate (3) is impregnated with the mixture (solution) in a reaction vessel.
- the blending ratio of the mixture obtained in Step II and the monolithic intermediate (3) is, for example, that the amount of the vinyl monomer added is in the range of 3 to 50 times the weight of the monolithic intermediate (3), preferably 4 to 50 times. It suffices to mix so that the range is 40 times.
- the vinyl monomer and the cross-linking agent in the mixture are adsorbed and distributed on the skeleton of the monolithic intermediate (3) which is left standing, and the polymerization proceeds within the skeleton of the monolithic intermediate (3).
- various polymerization conditions are selected depending on the type of monomer, the type of polymerization initiator, etc.
- 2,2'-azobis(isobutyronitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), benzoyl peroxide, lauroyl peroxide, potassium persulfate and the like are used as polymerization initiators.
- heat polymerization may be carried out at 30 to 100° C. for 1 to 48 hours in a sealed container under an inert atmosphere.
- the vinyl monomer and the cross-linking agent adsorbed and distributed on the skeleton of the monolithic intermediate (3) are polymerized within the skeleton, and the skeleton can be thickened.
- the contents are taken out and extracted with a solvent such as acetone for the purpose of removing the unreacted vinyl monomer and the organic solvent to obtain a third monolith.
- the fourth monolithic ion exchanger has a continuous skeleton composed of an aromatic vinyl polymer containing 0.1 to 5.0 mol% of crosslinked structural units in all structural units into which ion exchange groups are introduced.
- the monolithic ion exchanger deforms when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed through, especially when the solution is passed at a high flow rate. may be lost.
- the thickness of the continuous skeleton exceeds 60 ⁇ m in a dry state, the skeleton becomes too thick, and when the platinum group metal-supported catalyst is packed in a column and the reaction liquid is passed, the pressure loss during the liquid passage increases.
- the continuous pores are three-dimensionally continuous between the continuous skeletons in a dry state, for example, with an average diameter in the range of 10 to 200 ⁇ m, preferably in the range of 15 to 180 ⁇ m. If the average diameter of the continuous pores is less than 10 ⁇ m in a dry state, the pressure loss during the passage of the reaction liquid may increase when the platinum group metal-supported catalyst is packed in the column and the reaction liquid is passed. There is When the average diameter exceeds 200 ⁇ m, when the platinum group metal-supported catalyst is packed in a column and the reaction liquid is passed through, the contact between the reaction liquid and the monolithic ion exchanger may be insufficient.
- the total pore volume per weight in the dry state of the fourth monolithic ion exchanger is, for example, in the range of 0.5 to 10 mL/g. If the total pore volume is less than 0.5 mL/g, pressure loss may increase when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed through. Furthermore, the amount of permeating fluid per unit cross-sectional area becomes small, and the processing capacity may decrease. If the total pore volume exceeds 10 mL / g, the mechanical strength decreases, and when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed, the monolith may The ion exchanger may be deformed. Furthermore, the contact efficiency between the reaction liquid and the monolithic ion exchanger may decrease.
- vinyl polymers aromatic vinyl polymers
- examples of vinyl polymers (aromatic vinyl polymers) that make up the continuous skeleton include polystyrene, poly( ⁇ -methylstyrene), polyvinylbenzyl chloride, and the like.
- the above polymer may be a polymer obtained by copolymerizing a single vinyl monomer and a cross-linking agent, a polymer obtained by polymerizing a plurality of vinyl monomers and a cross-linking agent, or a blend of two or more types of polymers.
- the ion exchange capacity per weight in the dry state is as described above. Further, "the ion exchange groups are distributed in the organic porous ion exchanger" is as described above.
- the fourth monolith can be obtained by performing the following steps I to III after preparing a water-in-oil emulsion.
- step I for example, a water-in-oil emulsion is polymerized to obtain a monolithic organic porous intermediate having a continuous macropore structure with a total pore volume of, for example, more than 16 mL/g and 30 mL/g or less (hereinafter referred to as a monolith intermediate).
- a monolith intermediate having a continuous macropore structure with a total pore volume of, for example, more than 16 mL/g and 30 mL/g or less
- step II for example, an aromatic vinyl monomer, a cross-linking agent in the range of 0.3 to 5 mol% of all oil-soluble monomers having at least two or more vinyl groups in one molecule, an aromatic vinyl monomer or cross-linking
- a mixture containing an organic solvent and a polymerization initiator is prepared in which the agent is dissolved but the polymer formed by polymerization of the aromatic vinyl monomer is not dissolved.
- step III for example, the mixture obtained in step II is allowed to stand and polymerized in the presence of the monolith intermediate (4) obtained in step I to obtain a fourth monolith.
- the step I in the fourth monolith manufacturing method is the same as the first monolith ion exchanger manufacturing method.
- the type of polymer material for monolith intermediate (4) is the same as the type of polymer material for monolith intermediate (3) in the third monolith manufacturing method.
- the total pore volume per weight of the monolithic intermediate (4) obtained in step I is, for example, greater than 16 mL/g and less than or equal to 30 mL/g, preferably greater than 16 mL/g and 25 mL/g. It is below.
- the monolithic intermediate (4) has a nearly rod-like skeleton. When this is allowed to coexist in the polymerization system, a porous body having a co-continuous structure can be formed using the structure of the monolithic intermediate (4) as a mold.
- the average diameter of the openings (mesopores), which are the overlapping portions of the macropores, ranges from 5 to 100 ⁇ m in a dry state.
- step II in the fourth method for producing a monolith for example, an aromatic vinyl monomer, in all oil-soluble monomers having at least two or more vinyl groups in one molecule, for example, cross-linking in the range of 0.3 to 5 mol%
- step II is a step of preparing a mixture containing an organic solvent in which an agent, an aromatic vinyl monomer and a cross-linking agent are dissolved but a polymer formed by polymerization of the aromatic vinyl monomer is not dissolved, and a polymerization initiator. It should be noted that either step I or step II may be performed first.
- the aromatic vinyl monomer used in step II is not particularly limited as long as it contains a polymerizable vinyl group in the molecule and is highly soluble in an organic solvent. It is preferable to select a vinyl monomer that produces the same or similar polymer material as the monolithic intermediate (4) coexisting in the system. Specific examples of these vinyl monomers include styrene, ⁇ -methylstyrene, vinyltoluene, vinylbenzyl chloride, vinylbiphenyl and vinylnaphthalene. These monomers can be used singly or in combination of two or more. Preferred aromatic vinyl monomers are styrene, vinylbenzyl chloride, and the like.
- the amount of the aromatic vinyl monomer added in step II is, for example, 5 to 50 times, preferably 5 to 40 times, the weight of the monolithic intermediate (4) coexisting during polymerization.
- the cross-linking agent used in step II preferably contains at least two polymerizable vinyl groups in the molecule and has high solubility in organic solvents.
- cross-linking agents include divinylbenzene, divinylnaphthalene, divinylbiphenyl, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, butanediol diacrylate, and the like. These cross-linking agents can be used singly or in combination of two or more.
- the amount of cross-linking agent used is, for example, in the range of 0.3 to 5 mol %, particularly in the range of 0.3 to 3 mol %, based on the total amount of vinyl monomer and cross-linking agent (total oil-soluble monomer).
- the amount of the cross-linking agent to be used is preferably used so as to be approximately equal to the cross-linking density of the monolithic intermediate (4) coexisting during vinyl monomer/cross-linking agent polymerization. If the amounts of the two used are too different, the resulting monolith will have a biased crosslink density distribution, and when ion-exchange groups are introduced, cracks may easily occur during the ion-exchange group-introducing reaction.
- the organic solvent used in Step II is, for example, an organic solvent that dissolves the aromatic vinyl monomer and the cross-linking agent but does not dissolve the polymer produced by polymerizing the aromatic vinyl monomer. It is a poor solvent for the resulting polymer.
- Organic solvents include, for example, when the aromatic vinyl monomer is styrene, alcohols such as methanol, butanol and octanol; chain (poly)ethers such as diethyl ether, polyethylene glycol and polypropylene glycol; chain saturated hydrocarbons; esters such as ethyl acetate, isopropyl acetate, and ethyl propionate; Even good solvents for polystyrene, such as dioxane, THF, and toluene, can be used as organic solvents when they are used together with the above-described poor solvents and in small amounts.
- the polymerization initiator used in step II in the fourth monolith manufacturing method is the same as the polymerization initiator used in step II in the third monolith manufacturing method.
- step III in the fourth method for producing a monolith for example, the mixture obtained in step II is allowed to stand and polymerized in the presence of the monolith intermediate (4) obtained in step I to obtain a monolith intermediate.
- step III for example, the monolithic intermediate (4) is impregnated with the mixture (solution) in a reaction vessel.
- the blending ratio of the mixture obtained in step II and the monolithic intermediate (4) is, as described above, such that the amount of the aromatic vinyl monomer added is, for example, 5 to 50 times the weight of the monolithic intermediate (4). , preferably in the range of 5 to 40 times.
- the aromatic vinyl monomer and the cross-linking agent in the mixture are adsorbed and distributed on the skeleton of the monolithic intermediate (4) which is left still, and polymerization proceeds within the skeleton of the monolithic intermediate (4).
- the polymerization conditions for Step III in the fourth method for producing a monolith are the same as the polymerization conditions for Step III in the third method for producing a monolith.
- a fourth monolith ion exchanger can be obtained by carrying out step IV for introducing ion exchange groups into the fourth monolith obtained in step III.
- the method for introducing ion exchange groups into the fourth monolith is the same as the method for introducing ion exchange groups into the first monolith.
- the fifth monolith ion exchanger consists of a continuous skeleton phase and a continuous pore phase, and the skeleton is formed on the skeleton surface of a plurality of particles or organic porous bodies with a diameter of 4 to 40 ⁇ m fixed to the surface. having a plurality of projections with a size in the range of 4 to 40 ⁇ m, an average diameter of continuous pores in the range of 10 to 200 ⁇ m, and a total pore volume in the range of 0.5 to 10 mL/g. It is a monolithic ion exchanger in which the ion exchange capacity per weight in a dry state is in the range of 1 to 9 mg equivalent/g, and the ion exchange groups are distributed in the organic porous ion exchanger.
- the fifth monolithic ion exchanger is a composite structure having an organic porous body having a continuous skeleton phase and a continuous pore phase, and further having a plurality of particles or a plurality of projections, and a large number of particles or A composite structure having a large number of protrusions.
- a fifth monolithic ion exchanger and its manufacturing method are disclosed in JP-A-2009-108294.
- a plurality of particles are adhered to the skeleton surface of the organic porous material, and their diameters are in the range of 4 to 40 ⁇ m, for example.
- a plurality of protrusions are formed on the skeleton surface of the organic porous material, and the size thereof ranges from 4 to 40 ⁇ m in a dry state, for example.
- the diameter of the particles or the size of the projections is preferably in the range of 4-30 ⁇ m, more preferably in the range of 4-20 ⁇ m.
- particles and “projections” are collectively referred to as “particles and the like”.
- the average diameter of the continuous pores in the dry state is preferably in the range of 10-200 ⁇ m.
- the continuous skeleton phase and continuous pore phase of the fifth monolithic ion exchanger are observed by SEM images.
- the basic structure of the fifth monolithic ion exchanger includes continuous macropore structures and co-continuous structures.
- the skeletal phase of the fifth monolithic ion exchanger appears as a continuum of columns, a continuum of concave wall surfaces, or a composite of these, and has a shape clearly different from that of particles and protrusions.
- the fifth monolith ion exchanger includes the 5-1 monolith ion exchanger or the 5-2 monolith ion exchanger.
- the 5-1 monolithic ion exchanger is a continuous macropore structure in which cellular macropores are overlapped with each other, and the overlapped portions form openings having an average diameter of 10 to 120 ⁇ m in a dry state.
- the 5-2 monolithic ion exchanger has a three-dimensionally continuous skeleton having a thickness of, for example, 0.8 to 40 ⁇ m in a dry state, and an average diameter of, for example, 8 to 8 in a dry state between the skeletons. It is a co-continuous structure consisting of three-dimensionally continuous pores in the range of 80 ⁇ m.
- the monoliths before the ion exchange groups of the 5-1 and 5-2 monolith ion exchangers are introduced are called 5-1 and 5-2 monoliths.
- the aforementioned average diameter and dry thickness of the continuous skeleton are determined by the same measurement method as for the fourth monolithic ion exchanger.
- protrusions 22a to 22e project from the skeleton surface 21.
- the protrusion 22a has a nearly granular shape.
- the protrusion 22b is hemispherical.
- the protrusion 22c has a shape like a bulge on the skeleton surface.
- the length in the plane direction of the skeleton surface 21 of the projection 22d is longer in the direction perpendicular to the skeleton surface 21 of the projection 22d.
- the protrusion 22e has a shape that protrudes in a plurality of directions.
- the size of the protrusions is the length of the widest part of each protrusion in the SEM image.
- the fifth monolithic ion exchanger has a plurality of protrusions formed on the skeleton surface of the organic porous material.
- the proportion of particles having a dry state of 4 to 40 ⁇ m in the total particles is, for example, 70% or more, preferably 80% or more.
- the ratio of the above-described particles or the like refers to the ratio of the number of particles or the like having a specific size in a dry state to the total number of particles or the like.
- the surface of the skeleton phase is covered with, for example, 40% or more, preferably 50% or more, of all the particles or the like.
- the coverage ratio of the surface of the skeleton layer with all the particles or the like refers to the area ratio on the SEM image when the surface is observed by SEM, that is, the area ratio when the surface is viewed in plan. If the size of the particles covering the wall surface or the skeleton deviates from the above range, the effect of improving the efficiency of contact between the fluid and the skeleton surface and the inside of the skeleton of the monolithic ion exchanger tends to decrease.
- the diameter or size in the dry state of all particles, etc. in the SEM image was calculated, and the diameter or size was For example, it is confirmed whether particles in the range of 4 to 40 ⁇ m are observed. For example, it is determined that particles having a size of 4 to 40 ⁇ m are formed.
- the diameter or size in the dry state of all the particles, etc. in the SEM image is calculated for each field of view, and for each field of view, the diameter or size of the dry state, for example, in the range of 4 to 40 ⁇ m in the total particles, etc. The ratio of particles, etc.
- the fifth monolithic ion It is judged that the ratio of particles having a diameter of 4 to 40 ⁇ m in a dry state to all the particles formed on the skeleton surface of the exchanger is 70% or more. Further, according to the above, the coverage ratio of the surface of the skeletal layer with all particles, etc. in the SEM image was obtained for each field of view, and the coverage ratio of the surface of the skeleton layer with all particles, etc. was 40% or more in all fields of view. In this case, it is judged that the proportion of the surface of the skeleton layer of the fifth monolithic ion exchanger covered with all particles and the like is 40% or more.
- the coverage of the surface of the skeleton phase with particles or the like is less than 40%, the effect of improving the contact efficiency between the reaction liquid and the skeleton inside and the skeleton surface of the monolithic ion exchanger is small.
- the total pore volume per weight of the fifth monolithic ion exchanger in a dry state is, for example, in the range of 0.5 to 10 mL/g, preferably in the range of 0.8 to 8 mL/g. If the total pore volume is less than 0.5 mL/g, pressure loss may increase when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed through. Furthermore, the amount of permeating fluid per unit cross-sectional area becomes small, and the processing capacity may decrease. If the total pore volume exceeds 10 mL / g, the mechanical strength decreases, and when the platinum group metal-supported catalyst is packed in a column and the reaction solution is passed, the monolith may The ion exchanger may be deformed. Furthermore, the contact efficiency between the reaction liquid and the monolithic ion exchanger may decrease.
- the crosslink density of the polymer material constituting the skeleton is, for example, in the range of 0.3 to 10 mol%, preferably 0.3, based on the total structural units constituting the polymer material. It suffices if the crosslinked structural unit is contained in a range of up to 5 mol %.
- the organic polymeric material constituting the skeleton of the fifth monolithic ion exchanger is the same as that of the first monolithic ion exchanger.
- the material constituting the skeleton phase of the organic porous body and the particles formed on the surface of the skeleton phase are made of the same material with the same continuous structure, and the structure is not the same. Examples include continuous ones made of different materials. Examples of materials with different continuous non-same textures include materials with different types of vinyl monomers, materials with the same types of vinyl monomers and cross-linking agents but different blending ratios, etc. is mentioned.
- the fifth monolithic ion exchanger has a thickness of, for example, 1 mm or more, and is distinguished from the membrane-like porous body.
- the thickness of the fifth monolithic ion exchanger preferably ranges from 3 to 1000 mm.
- the ion exchange capacity per weight in the dry state is as described above. Further, "the ion exchange groups are distributed in the organic porous ion exchanger" is as described above.
- a fifth monolithic ion exchanger can be produced, for example, by the following method.
- a fifth monolith can be obtained, for example, by preparing a water-in-oil emulsion and then performing the following steps I to III.
- step I for example, a water-in-oil emulsion is polymerized to obtain a monolithic organic porous intermediate having a continuous macropore structure with a total pore volume in the range of, for example, 5 to 30 mL/g (hereinafter, monolith intermediate (5) ) can be obtained.
- monolith intermediate (5) for example, a vinyl monomer, a cross-linking agent having at least two vinyl groups in one molecule, an organic solvent in which the vinyl monomer and the cross-linking agent are soluble but the polymer produced by polymerization of the vinyl monomer is not soluble, and polymerization.
- step III for example, the mixture obtained in step II is allowed to stand and polymerized in the presence of the monolith intermediate (5) obtained in step I to obtain a fifth monolith.
- the I step in the fifth monolith manufacturing method is the same as the I step in the third monolith manufacturing method.
- the type of polymer material for monolith intermediate (5) is the same as the type of polymer material for monolith intermediate (3) in the third monolith manufacturing method.
- the total pore volume per unit weight of the monolithic intermediate (5) obtained in step I is, for example, in the range of 5-30 mL/g, preferably in the range of 6-28 mL/g.
- the ratio (weight) of the monomer and water may be, for example, approximately 1:5 to 1:35.
- step I if the ratio of this monomer to water is approximately 1:5 to 1:20, the monolith intermediate (5) has a continuous macropore structure with a total pore volume of, for example, 5 to 16 mL/g.
- the resulting monolith obtained through step III is the 5-1 monolith.
- the monomer to water ratio is approximately 1:20 to 1:35, the total pore volume of the monolith intermediate (5) is, for example, more than 16 mL/g and a continuous macropore structure of 30 mL/g or less. , and the monolith obtained through the III step becomes the No. 5-2 monolith.
- the average diameter of the openings (mesopores), which are the overlapping portions of the macropores is 20 to 200 ⁇ m in a dry state, for example.
- the second step in the fifth monolith manufacturing method is the same as the second step in the third monolith manufacturing method.
- step III in the fifth method for producing a monolith for example, the mixture obtained in step II is allowed to stand and in the presence of the monolith intermediate (5) obtained in step I, polymerization is performed to obtain the fifth You can get a monolith.
- the internal volume of the reaction vessel is not particularly limited as long as it is large enough to allow the monolith intermediate (5) to exist in the reaction vessel.
- the monolith intermediate (5) When the monolith intermediate (5) is placed in the reaction vessel, either a gap is formed around the monolith in plan view or the monolith intermediate (5) enters the reaction vessel with almost no gap. .
- the fifth monolith after polymerization is hardly pressed by the inner wall of the vessel and enters the reaction vessel with almost no gap. efficient. Even if the inner volume of the reaction vessel is large and there is a gap around the fifth monolith after polymerization, the vinyl monomer and the cross-linking agent are adsorbed and distributed to the monolith intermediate (5). , particle aggregate structures are hardly formed in the gaps in the reaction vessel.
- the monolith intermediate (5) is impregnated with the mixture (solution) in a reaction vessel.
- the blending ratio of the mixture obtained in step II and the monolithic intermediate (5) is, as described above, preferably such that the amount of the vinyl monomer added is in the range of, for example, 3 to 50 times the weight of the monolithic intermediate (5). may be blended so as to be in the range of 4 to 40 times.
- the vinyl monomer and the cross-linking agent in the mixture are adsorbed and distributed on the skeleton of the monolithic intermediate (5) which is left standing, and the polymerization proceeds within the skeleton of the monolithic intermediate (5).
- step III in the fifth monolith manufacturing method the polymerization conditions are almost the same as in step III in the third monolith manufacturing method.
- step II or step III When step II or step III is performed under conditions that satisfy at least one of the following conditions (1) to (5) when manufacturing the fifth monolith, particles and the like are formed on the surface of the skeleton. monoliths can be produced.
- the polymerization temperature in step III is at least 5°C lower than the 10-hour half-life temperature of the polymerization initiator.
- the mol % of the cross-linking agent used in step II is at least twice the mol % of the cross-linking agent used in step I.
- the vinyl monomer used in step II has a structure different from that of the oil-soluble monomer used in step I.
- the organic solvent used in step II is polyether having a molecular weight of 200 or more.
- the concentration of the vinyl monomer used in step II is 30% by weight or less in the mixture in step II.
- a preferable structure of the fifth monolith obtained in this way is a continuous macropore structure ("second 5-1 monolith”), and a three-dimensionally continuous skeleton having a thickness in a dry state of, for example, 0.8 to 40 ⁇ m, and a diameter between the skeletons in a dry state of, for example, 8 to 80 ⁇ m. and a co-continuous structure (“No. 5-2 monolith”) consisting of three-dimensionally continuous pores in the range of .
- the method for introducing ion-exchange groups into the fifth monolith is the same as the method for introducing ion-exchange groups into the first monolith.
- Platinum group metal-supported catalyst used in the platinum group metal-supported catalyst column according to the present embodiment is the non-particulate organic porous ion exchanger, for example, the first monolithic ion exchanger to the fifth monolithic ion exchanger.
- platinum group metal-supported catalysts are catalysts supported by binding platinum group metal ions or platinum group metal complex ions to quaternary ammonium groups in the ion exchanger by ionic bonds or coordinate bonds. .
- Platinum group metals are ruthenium, rhodium, palladium, osmium, iridium, and platinum. These platinum group metals may be used singly or in combination of two or more metals, and two or more metals may be used as an alloy. Among these, platinum, palladium, and platinum/palladium alloys are preferred because they have high catalytic activity.
- the average particle size of the platinum group metal nanoparticles is, for example, in the range of 1 to 100 nm, preferably in the range of 1 to 50 nm, and more preferably in the range of 1 to 20 nm. If the average particle size of the platinum group metal nanoparticles is less than 1 nm, the platinum group metal particles may detach from the support. may not be available in the future.
- the platinum group metal ion is an ion of the platinum group metal, and the valence of the platinum group metal ion varies depending on the type of platinum group metal. These platinum group metal ions may be used singly or in combination of two or more metals. Among these, platinum ions and palladium ions are preferred because they have high catalytic activity.
- the platinum group metal complex ions are complex ions of the above platinum group metals, and include, for example, palladium complex ions, platinum complex ions, iridium complex ions, and the like. These platinum group metal complex ions may be used singly or in combination of two or more metals. Among these, platinum complex ions and palladium complex ions are preferable because they have high catalytic activity.
- the supported amount of the platinum group metal, etc. in the supported platinum group metal catalyst ((weight in terms of platinum group metal atoms/weight of supported platinum group metal catalyst in dry state) x 100) is 0.004 to 20% by weight in a dry state. and preferably in the range of 0.005 to 15% by weight. If the amount of the platinum group metal or the like supported in a dry state is less than 0.004% by weight, the catalytic activity may become insufficient, and if it exceeds 20% by weight, metal elution into water may be observed. .
- the amount of platinum group metal atoms in the platinum group metal-supported catalyst is determined using an ICP emission spectrometer.
- the manufacturing method of the supported platinum group metal catalyst is not particularly limited, and a supported platinum group metal catalyst can be obtained by supporting a platinum group metal or the like on a monolithic ion exchanger by a known method.
- a dry monolithic ion exchanger is immersed in an organic solution of a platinum group metal compound such as palladium acetate in methanol or the like at a predetermined temperature for a predetermined time, and the platinum group metal ions are adsorbed to the monolithic ion exchanger by ion exchange.
- a method of supporting platinum group metal nanoparticles on a monolithic ion exchanger by contacting with a reducing agent and a method of placing the monolithic ion exchanger in an aqueous solution of a platinum group metal complex compound such as a tetraamminepalladium complex at a predetermined temperature.
- platinum group metal ions are adsorbed on the monolithic ion exchanger by ion exchange, and then contacting with a reducing agent to support the platinum group metal nanoparticles on the monolithic ion exchanger.
- the loading of platinum group metals and the like on the monolithic ion exchanger may be either a batch system or a flow system, and there are no particular restrictions.
- the platinum group metal compound used in the method for producing a supported platinum group metal catalyst may be either an organic salt or an inorganic salt, and examples include halides, sulfates, nitrates, phosphates, organic acid salts, inorganic complex salts, and the like. .
- platinum group metal compounds include palladium chloride, palladium nitrate, palladium sulfate, palladium acetate, tetraamminepalladium chloride, tetraamminepalladium nitrate, platinum chloride, tetraammineplatinum chloride, tetraammineplatinum nitrate, chlorotriammineplatinum chloride, Hexaammineplatinum chloride, hexaammineplatinum sulfate, chloropentammineplatinum chloride, cis-tetrachlorodiammineplatinum chloride, trans-tetrachlorodiammineplatinum chloride, rhodium chloride, rhodium acetate, hexaamminerhodium chloride, hexa ammine rhodium bromide, hexaammine rhodium sulfate, pentaammine aquarodium chloride, pentaammine aquarodium
- a platinum group metal compound is usually used by dissolving it in a solvent when supporting a platinum group metal or the like.
- Water alcohols such as methanol, ethanol, propanol, butanol, and benzyl alcohol; ketones such as acetone and methyl ethyl ketone; nitriles such as acetonitrile; is used.
- an acid such as hydrochloric acid, sulfuric acid, or nitric acid, or a base such as sodium hydroxide or tetramethylammonium hydroxide may be added.
- reducing agent used in the method for producing a supported platinum group metal catalyst there are no particular restrictions on the reducing agent used in the method for producing a supported platinum group metal catalyst, and hydrogen, carbon monoxide, reducing gases such as ethylene; alcohols such as methanol, ethanol, propanol, butanol, and benzyl alcohol; formic acid and formic acid.
- Carboxylic acids such as ammonium, oxalic acid, citric acid, sodium citrate, ascorbic acid, calcium ascorbate and their salts; ketones such as acetone and methyl ethyl ketone; aldehydes such as formaldehyde and acetaldehyde; hydrazine, methylhydrazine, ethylhydrazine, butylhydrazine , allylhydrazine, phenylhydrazine, and the like; hypophosphorous tertiary salts, such as sodium hypophosphite and potassium hypophosphite; sodium borohydride and the like.
- ketones such as acetone and methyl ethyl ketone
- aldehydes such as formaldehyde and acetaldehyde
- hydrazine methylhydrazine, ethylhydrazine, butylhydrazine , allylhydrazine
- reaction conditions for the reduction reaction for example, the reaction is carried out at a temperature of -20°C to 150°C for 1 minute to 20 hours to reduce the platinum group metal compound to a zero-valent platinum group metal.
- the ion form of the monolithic ion exchanger which is the support for platinum group metal nanoparticles. or a regenerated form in which the counter ion is a hydrogen ion.
- a salt form in which the counter ion is replaced with a chloride ion, a nitrate ion, or the like may be used. It may also be in a regenerated form in which the ions are hydroxide ions.
- Platinum group metal capture material The platinum group metal scavenger used in the platinum group metal-supported catalyst column according to the present embodiment is capable of supporting at least one of platinum group metal nanoparticles, platinum group metal ions, and platinum group metal complex ions. Any material may be used, and examples thereof include ion exchangers, silica gel, and metal-removing filters. Of these, ion exchangers are preferable, and non-particulate organic porous ion exchangers are more preferable, because of their high ability to capture various metals.
- the non-particulate organic porous ion exchanger used as a platinum group metal scavenger consists of a continuous skeleton phase and a continuous pore phase.
- the diameter ranges from 1 to 1000 ⁇ m
- the total pore volume ranges from 0.5 to 50 mL/g
- the ion exchange capacity per weight in the dry state ranges from 1 to 9 mgeq/g. It is preferably a non-particulate organic porous ion exchanger in which the ion exchange groups are distributed throughout the ion exchanger.
- the non-particulate organic porous ion exchanger used as the platinum group metal scavenger is the same as the non-particulate organic porous ion exchanger used as the ion exchanger, and the description thereof is omitted.
- the carbon-carbon bond forming method uses the platinum group metal supported catalyst column, for example, (1) reaction of aromatic halide and organic boron compound, (2) aromatic halide and a compound having an alkynyl group at the end thereof, or (3) an aromatic halide and a compound having an alkenyl group are reacted to form a carbon-carbon bond.
- examples of aromatic carbocyclic or aromatic heterocyclic groups for Ar 1 include phenyl, naphthyl, biphenyl, anthranyl, pyridyl, pyrimidyl, indolyl, benz imidazolyl group, quinolyl group, benzofuranyl group, indanyl group, indenyl group, dibenzofuranyl group and the like.
- boron bonds to the aromatic carbocyclic group or aromatic heterocyclic group there are no particular restrictions on the position at which boron bonds to the aromatic carbocyclic group or aromatic heterocyclic group, and boron can be bonded to any position.
- one or more substituents may be introduced into the aromatic carbocyclic group or aromatic heterocyclic group.
- substituents include hydrocarbon groups such as methyl group, ethyl group, propyl group, butyl group, hexyl group and benzyl group; alkoxy groups such as methoxy group, ethoxy group, propoxy group and butoxy group; Nilmethoxycarbonyl group, butoxycarbonyl group, benzyloxycarbonyl group, nitro group and the like.
- the aromatic halide used in the carbon-carbon bond forming method (1) is, for example, an aromatic halide represented by the following general formula (II).
- Ar 2 —X (II) (In the formula, Ar 2 is an aromatic carbocyclic group or aromatic heterocyclic group having 6 to 18 carbon atoms, and X is a halogen atom.)
- Examples of the aromatic carbocyclic group or aromatic heterocyclic group for Ar 2 in formula (II) are the same as those for Ar 1 . There are no particular restrictions on the position at which the halogen atom is bonded to the aromatic carbocyclic group or aromatic heterocyclic group, and the halogen atom can be bonded at any position. In addition, one or more substituents may be introduced into the aromatic carbocyclic group or aromatic heterocyclic group.
- a second form of the carbon-carbon bond forming method (hereinafter also referred to as a carbon-carbon bond forming method (2)) uses the platinum group metal-supported catalyst column to form an aromatic halide and an alkynyl group at the end. It is a reaction to form a carbon-carbon single bond by reacting with a compound having
- the aromatic halide used in the carbon-carbon bond forming method (2) is, for example, the aromatic halide represented by formula (II) above.
- R 2 is an optionally substituted C 6-18 aromatic carbocyclic group or an optionally substituted C 6-18 aromatic Examples of heterocyclic groups are the same as Ar 1 and Ar 2 in formulas (I) and (II).
- examples of the optionally substituted aliphatic hydrocarbon group having 1 to 18 carbon atoms, which is R 2 include a methyl group, an ethyl group, a propyl group, a butyl group and a hexyl group. , octyl group, dodecyl group, octadecyl group and the like.
- optionally substituted alkenyl groups having 2 to 18 carbon atoms which are R 2 in formula (IV)
- examples of optionally substituted alkenyl groups having 2 to 18 carbon atoms, which are R 2 in formula (IV) include a vinyl group, an allyl group, a methallyl group, a propenyl group, a butenyl group and a hexenyl group. , octenyl group, decenyl group, octadecenyl group and the like.
- Examples of the optionally substituted alkynyl group having 2 to 10 carbon atoms, which is R 2 in formula (IV), include an ethynyl group, a propynyl group, a hexynyl group and an octenyl group.
- the platinum group metal-supported catalyst column is used to react, for example, the aromatic halide represented by the formula (II) with the compound represented by the formula (IV), The product of formula (V) is obtained.
- Ar 2 —C ⁇ C—R 2 (V) (wherein Ar 2 and R 2 are the same as in formulas (II) and (IV).)
- the ratio of the aromatic halide used in the carbon-carbon bond forming method (2) and the compound having an alkynyl group at the terminal is not particularly limited, but for example, the molar ratio of the aromatic halide: having an alkynyl group at the terminal
- the compound ratio ranges from 0.5 to 3:1 and may be used in equimolar amounts.
- a third form of the carbon-carbon bond-forming method (hereinafter also referred to as a carbon-carbon bond-forming method (3)) uses the platinum group metal-supported catalyst column, and has an aromatic halide and an alkenyl group. It is a reaction that forms a carbon-carbon single bond by reacting with a compound.
- the aromatic halide used in the carbon-carbon bond forming method (3) is, for example, the aromatic halide represented by the above formula (II).
- a compound having an alkenyl group used in the carbon-carbon bond forming method (3) is, for example, a compound represented by formula (VI).
- R3HC CR4R5 ( VI) (wherein R 3 , R 4 and R 5 each independently have a hydrogen atom, an optionally substituted aromatic carbocyclic group having 6 to 18 carbon atoms, a substituent an aromatic heterocyclic group having 6 to 18 carbon atoms which may be substituted, an aliphatic hydrocarbon group having 1 to 18 carbon atoms which may have a substituent, a carboxylic acid derivative, an acid amide derivative or a cyano group. )
- R 3 , R 4 and R 5 an aromatic carbocyclic group having 6 to 18 carbon atoms which may be substituted, and the number of carbon atoms which may be substituted
- aliphatic hydrocarbon groups such as 6 to 18 aromatic heterocyclic groups and optionally substituted groups having 1 to 18 carbon atoms are the same as R 2 in formula (IV).
- Examples of carboxylic acid derivatives represented by R 3 , R 4 and R 5 in formula (VI) include alkoxycarbonyl groups such as methoxycarbonyl, ethoxycarbonyl and butoxycarbonyl.
- Examples of acid amide derivatives represented by R 3 , R 4 and R 5 in formula (VI) include carbamoyl groups such as N-methylcarbamoyl group and N,N-dimethylcarbamoyl group.
- the platinum group metal-supported catalyst column is used to react the aromatic halide represented by the formula (II) with the compound represented by the formula (VI) to form the formula ( The product of VII) is obtained.
- R3Ar2C CR4R5 ( VII) (In the formula, Ar 2 , R 3 , R 4 and R 5 are the same as in formula (II) and formula (VI) above.)
- the amount of platinum group metal-supported catalyst used is, for example, in the range of 0.01 to 20 mol% in terms of platinum group metal with respect to the aromatic halide. is.
- solvents used in the coupling reaction include water, organic solvents, and mixtures thereof.
- organic solvents include alcohols such as methanol, ethanol, propanol, butanol, ethylene glycol and glycerin; cyclic ethers such as tetrahydrofuran and dioxane.
- the atmosphere in which the carbon-carbon bond forming method is performed may be air, but is preferably under an inert gas atmosphere such as nitrogen or argon.
- the reaction temperature is not particularly limited, it may be arbitrarily set, for example, in the range of -20°C to 150°C.
- the reaction time is not particularly limited, but may be set, for example, in the range of 1 minute to 24 hours.
- bases used include inorganic bases such as sodium carbonate, sodium hydrogen carbonate, potassium carbonate, cesium carbonate, potassium acetate, sodium phosphate, potassium phosphate, barium hydroxide; potassium phenolate, sodium methoxide, sodium ethoxylate; organic bases such as sodium chloride, potassium butoxide, trimethylamine and triethylamine.
- the amount of these bases to be used is set, for example, in the range of 50 to 300 mol % relative to the aromatic halide.
- a reaction for forming a carbon-carbon bond is performed by passing the raw material solution for the reaction through the platinum group metal-supported catalyst column.
- the carbon-carbon bond forming reactions (1) to (3) are performed by, for example, a raw material solution (i) containing the aromatic halide and the organic boron compound. , the raw material liquid (ii) containing the aromatic halide and the compound having an alkynyl group at the terminal, or the raw material liquid (iii) containing the aromatic halide and the compound having an alkenyl group,
- a reaction for forming a carbon-carbon bond is carried out by passing a liquid through the platinum group metal-supported catalyst column through an introduction route and discharging the reaction liquid through a discharge route.
- the raw material liquid (i), the raw material liquid (ii), or the raw material liquid (iii) is an inorganic base-dissolving raw material in which the raw material and the inorganic base are dissolved in water or a hydrophilic solvent.
- the raw material solution for dissolving an inorganic base may be passed through the platinum group metal-supported catalyst column through an introduction route, and the reaction solution may be discharged through a discharge route to carry out a carbon-carbon bond formation reaction. .
- the raw material solution (i), the raw material solution (ii), or the raw material solution (iii) is a hydrophobic solvent raw material solution in which the raw material is dissolved in a hydrophobic organic solvent.
- a mixture of a hydrophobic solvent raw material solution and an inorganic base aqueous solution in which an inorganic base is dissolved is passed through the platinum group metal-supported catalyst column through an introduction route, and the reaction solution is discharged through a discharge route.
- a carbon-carbon bond forming reaction may be carried out by.
- the carbon-carbon bond forming method according to the present embodiment can form a carbon-carbon bond to obtain a desired compound, and a target product can be obtained with a high yield.
- the carbon-carbon bond forming reaction can be carried out in high yield even with aromatic bromides.
- the desired product can be obtained in a short reaction time and in a high yield.
- the carbon-carbon bond forming method according to the present embodiment the carbon-carbon bond forming method for forming a carbon-carbon bond to obtain a desired compound can be performed in a fixed bed continuous flow system, Carbon-carbon bonding reactions can be carried out with high yields on a variety of starting materials. Moreover, from the viewpoint of production efficiency, a high-concentration raw material solution can be used.
- Example 1 A monolith was manufactured according to the fifth method for manufacturing a monolithic ion exchanger, and ion exchange groups were introduced into the obtained monolith.
- Step II Manufacturing of Monolith (Step II) Then, 216.6 g of styrene as a monomer, 4.4 g of divinylbenzene as a cross-linking agent, 220 g of 1-decanol as an organic solvent, and 0.8 g of 2,2′-azobis(2,4-dimethylvaleronitrile) as a polymerization initiator are mixed. and dissolved uniformly (step II).
- Fig. 11 shows the result of SEM observation of the internal structure of the monolith (dry body) containing 1.2 mol% of the cross-linking component of the styrene/divinylbenzene copolymer thus obtained.
- this monolith had a co-continuous structure in which the skeleton and the pores were three-dimensionally continuous and consisted of a continuous skeleton phase and a continuous pore phase, and both phases were intertwined.
- the thickness of the continuous skeleton measured from the SEM image was 20 ⁇ m.
- the three-dimensionally continuous pores of this monolith had an average diameter of 70 ⁇ m and a total pore volume of 4.4 mL/g, as measured by mercury porosimetry. The average pore diameter was obtained from the maximum value of the pore distribution curve obtained by the mercury porosimetry.
- the dry total anion exchange capacity of the resulting weakly basic monolithic anion exchanger was 4.7 mgeq/g, and the weak anion exchange capacity was 4.3 mgeq/g.
- the thickness of the skeleton in the dry state measured from the SEM image was 25 ⁇ m.
- the obtained weakly basic monolithic anion exchanger is hereinafter referred to as "monolithic weak anion exchanger".
- the weakly basic monolithic anion exchanger prepared was dried under vacuum. The weight of the weakly basic monolithic anion exchanger after drying was 8.7 g.
- This dry weakly basic monolithic anion exchanger is placed in a separable flask equipped with a stirrer, a solution of 190 mg of palladium acetate in ethyl acetate is introduced, and the mixture is stirred at room temperature (25 ⁇ 5° C.) for 5 days, A monolithic anion exchanger was loaded with palladium ions. This monolithic anion exchanger was washed with methanol and further washed with pure water.
- the Pd ion-carrying monolithic anion exchanger thus obtained was washed several times with pure water, and then dried under reduced pressure.
- the amount of palladium carried in the obtained Pd ion-carrying monolith anion exchanger was determined with an ICP emission spectrometer (manufactured by Hitachi High-Tech Science, PS3520UVDDII type), the amount of palladium carried was 1% by weight.
- Platinum group metal-supported catalyst is hereinafter referred to as "Pd monolith weak anion exchanger".
- catalyst column 1 The platinum group metal-supported catalyst column obtained in Example 1 is hereinafter referred to as "catalyst column 1".
- Example 2 Carbon-carbon bond forming reaction using platinum group metal-supported catalyst column
- a solution of sodium hydroxide (35.2 mmol) in water (22 mL) as an inorganic base was added to a solution of /ethanol (32 mL, 1:1 (vol)) and stirred. This solution was fed at a rate of 0.3 mL/min, and passed through the catalyst column 1 prepared in Example 1 heated to 80° C.
- Example 1 (Preparation of platinum group metal-supported catalyst column)
- the Pd monolithic weak anion exchanger produced in Example 1 was formed into a size of ⁇ 4.6 ⁇ 30 mm and packed in a ⁇ 4.6 ⁇ 30 mm SUS column to produce a platinum group metal-supported catalyst column.
- catalyst column 2 The platinum group metal-supported catalyst column obtained in Comparative Example 1 is hereinafter referred to as "catalyst column 2".
- the carbon-carbon bond forming reaction could be carried out in high yield even with aromatic bromides.
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Abstract
Description
本発明の実施の形態に係る白金族金属担持触媒カラムは、白金族金属担持触媒が充填容器内に充填されている白金族金属担持触媒カラムである。白金族金属担持触媒は、イオン交換体に、白金族金属ナノ粒子、白金族金属イオン、および白金族金属錯イオンのうち少なくとも1つが担持されている白金族金属担持触媒である。そして、このイオン交換体は、連続骨格相と連続空孔相とからなり、連続骨格の厚みは、1~100μmの範囲であり、連続空孔の平均直径は、1~1000μmの範囲であり、全細孔容積は、0.5~50mL/gの範囲であり、乾燥状態での重量当りのイオン交換容量は、1~9mg当量/gの範囲であり、イオン交換基がイオン交換体中に分布している非粒子状有機多孔質イオン交換体である。
本実施形態に係る白金族金属担持触媒カラムに用いられる白金族金属担持触媒において、白金族金属等が担持されている担体は、非粒状有機多孔質イオン交換体である。非粒子状有機多孔質イオン交換体は、連続骨格の相と連続空孔の相を有するモノリス状有機多孔質体にイオン交換基を導入したものである。モノリス状有機多孔質体は、骨格間に流路となる連通孔を多数有する。なお、本明細書中、「モノリス状有機多孔質体」を単に「モノリス」と、「モノリス状有機多孔質イオン交換体」を単に「モノリスイオン交換体」とも言い、また、モノリスの製造における中間体(前駆体)である「モノリス状有機多孔質中間体」を単に「モノリス中間体」とも言う。
非粒子状有機多孔質イオン交換体のより具体的な実施形態として、例えば、以下に示す第1のモノリス状有機多孔質イオン交換体(モノリスイオン交換体)~第5のモノリス状有機多孔質イオン交換体(モノリスイオン交換体)が挙げられる。以下の説明において、上記の非粒子状有機多孔質イオン交換体と同様の構成については、その説明を省略する。
第1のモノリスイオン交換体は、互いにつながっているマクロポアとマクロポアの壁内に平均直径が1~1000μmの範囲の共通の開口(メソポア)を有する連続マクロポア構造を有し、全細孔容積が1~50mL/gの範囲であり、乾燥状態での重量当りのイオン交換容量は、1~9mg当量/gの範囲であり、イオン交換基が有機多孔質イオン交換体中に分布しているモノリスイオン交換体である。
第1のモノリスイオン交換体は、例えば、次の方法によって製造することができる。
第2のモノリスイオン交換体は、平均粒子径1~50μmの範囲の有機ポリマー粒子が凝集して三次元的に連続した骨格部分を形成し、その骨格間に平均直径が20~100μmの範囲の三次元的に連続した空孔を有し、全細孔容積は、1~10mL/gの範囲であり、乾燥状態での重量当りのイオン交換容量は、1~9mg当量/gの範囲であり、イオン交換基が有機多孔質イオン交換体中に分布しているモノリスイオン交換体である。
第2のモノリスイオン交換体は、例えば、次の方法によって製造することができる。
第3のモノリスイオン交換体は、気泡状のマクロポア同士が重なり合い、この重なる部分が平均直径30~300μmの範囲の開口となる連続マクロポア構造体であり、全細孔容積は、0.5~10mL/gの範囲であり、乾燥状態での重量当りのイオン交換容量は、1~9mg当量/gの範囲であり、イオン交換基が有機多孔質イオン交換体中に分布しており、かつ連続マクロポア構造体の切断面のSEM画像において、断面に表れる骨格部面積が、画像領域中25~50%の範囲であるモノリスイオン交換体である。
第3のモノリスイオン交換体は、例えば、次の方法によって製造することができる。
第4のモノリスイオン交換体は、イオン交換基が導入された全構成単位中、架橋構造単位を0.1~5.0モル%の範囲で含有する芳香族ビニルポリマーから構成される連続骨格の厚みが1~60μmの範囲の三次元的に連続した骨格と、その骨格間に平均直径が10~200μmの範囲の三次元的に連続した空孔とからなる共連続構造体であって、全細孔容積は、0.5~10mL/gの範囲であり、乾燥状態での重量当りのイオン交換容量は、1~9mg当量/gの範囲であり、イオン交換基が前記有機多孔質イオン交換体中に分布しているモノリスイオン交換体である。
第4のモノリスイオン交換体は、例えば、次の方法によって製造することができる。
第5のモノリスイオン交換体は、連続骨格相と連続空孔相からなり、骨格は、表面に固着する直径4~40μmの範囲の複数の粒子体または有機多孔質体の骨格表面上に形成される大きさが4~40μmの範囲の複数の突起体を有し、連続空孔の平均直径は、10~200μmの範囲であり、全細孔容積は、0.5~10mL/gの範囲であり、乾燥状態での重量当りのイオン交換容量は、1~9mg当量/gの範囲であり、イオン交換基が前記有機多孔質イオン交換体中に分布しているモノリスイオン交換体である。
第5のモノリスイオン交換体は、例えば、次の方法によって製造することができる。
(1)III工程における重合温度が、重合開始剤の10時間半減温度より、少なくとも5℃低い温度である。
(2)II工程で用いる架橋剤のモル%が、I工程で用いる架橋剤のモル%の2倍以上である。
(3)II工程で用いるビニルモノマーが、I工程で用いた油溶性モノマーとは異なる構造のビニルモノマーである。
(4)II工程で用いる有機溶媒が、分子量200以上のポリエーテルである。
(5)II工程で用いるビニルモノマーの濃度が、II工程の混合物中、30重量%以下である。
本実施形態に係る白金族金属担持触媒カラムに用いられる白金族金属担持触媒は、上記非粒子状有機多孔質イオン交換体、例えば、第1のモノリスイオン交換体~第5のモノリスイオン交換体のいずれかに、白金族金属ナノ粒子、白金族金属イオン、および白金族金属錯イオンのうち少なくとも1つが担持されている触媒である。すなわち、白金族金属担持触媒では、白金族金属がナノ粒子の状態またはイオンの状態で上記非粒子状有機多孔質イオン交換体に担持されている。例えば、白金族金属担持触媒は、上記イオン交換体中の四級アンモニウム基に、白金族金属イオンまたは白金族金属錯イオンがイオン結合または配位結合により結合することによって担持されている触媒である。
本実施形態に係る白金族金属担持触媒カラムに用いられる白金族金属捕捉材は、白金族金属ナノ粒子、白金族金属イオン、および白金族金属錯イオンのうち少なくとも1つを担持することができるものであればよく、例えば、イオン交換体、シリカゲル、金属除去フィルター等が挙げられる。これらのうち、各種の金属に対して捕捉性能が高い等の点から、イオン交換体が好ましく、非粒子状有機多孔質イオン交換体がより好ましい。
本発明の実施形態に係る炭素-炭素結合形成方法は、上記白金族金属担持触媒カラムを用いて、例えば、(1)芳香族ハロゲン化物と有機ホウ素化合物との反応、(2)芳香族ハロゲン化物と末端にアルキニル基を有する化合物との反応、または(3)芳香族ハロゲン化物とアルケニル基を有する化合物との反応を行い、炭素-炭素結合を形成させる炭素-炭素結合形成方法である。
R1-B(OH)2
(R1は、有機基であり、有機基であれば特に制限されないが、例えば、直鎖状アルキル基、分岐鎖状アルキル基、環状アルキル基、芳香族炭素環式基、芳香族複素環式基等であり、本実施形態の効果を阻害しない範囲であれば、これらの基には、メチル基、エチル基、ニトロ基、アミノ基、メトキシ基、エトキシ基、カルボキシル基、アセチル基等が導入されていてもよい。)で示される有機ホウ素化合物である。
Ar1-B(OH)2 (I)
(式中、Ar1は、炭素数6~18の芳香族炭素環式基または芳香族複素環式基である。)
Ar2-X (II)
(式中、Ar2は、炭素数6~18の芳香族炭素環式基または芳香族複素環式基であり、Xはハロゲン原子である。)
Ar1-Ar2 (III)
(式中、Ar1およびAr2は、上記式(I)および(II)と同様である。)
HC≡C-R2 (IV)
(式中、R2は、水素原子、置換基を有していてもよい炭素数6~18の芳香族炭素環式基、置換基を有していてもよい炭素数6~18の芳香族複素環式基、置換基を有していてもよい炭素数1~18の脂肪族炭化水素基、置換基を有していてもよい炭素数2~18のアルケニル基、または、置換基を有していてもよい炭素数2~10のアルキニル基である。)
Ar2-C≡C-R2 (V)
(式中、Ar2およびR2は、式(II)および(IV)と同様である。)
R3HC=CR4R5 (VI)
(式中、R3,R4,R5は、それぞれ独立して水素原子、置換基を有していてもよい炭素数6~18の芳香族炭素環式基、置換基を有していてもよい炭素数6~18の芳香族複素環式基、置換基を有していてもよい炭素数1~18の脂肪族炭化水素基、カルボン酸誘導体、酸アミド誘導体、またはシアノ基である。)
R3Ar2C=CR4R5 (VII)
(式中、Ar2,R3,R4,R5は、上記式(II)および上記式(VI)と同様である。)
第5のモノリスイオン交換体の製造方法にしたがって、モノリスの製造を行い、得られたモノリスにイオン交換基を導入した。
モノマーとしてスチレン9.28g、ジビニルベンゼン0.19g、界面活性剤としてソルビタンモノオレエート(以下SMOと略す)0.50gおよび重合開始剤として2,2’-アゾビス(イソブチロニトリル)0.25gを混合し、均一になるように溶解させた。次に、このスチレン/ジビニルベンゼン/SMO/2,2’-アゾビス(イソブチロニトリル)混合物を180gの純水に添加し、遊星式撹拌装置である真空撹拌脱泡ミキサー(イーエムイー社製)を用いて減圧下撹拌して、油中水滴型エマルションを得た。このエマルションを速やかに反応容器に移し、密封後、静置下60℃で24時間重合させた。重合終了後、内容物を取り出し、メタノールで抽出した後、減圧乾燥して、連続マクロポア構造を有するモノリス中間体を製造した。このようにして得られたモノリス中間体(乾燥体)の内部構造をSEMにより観察した。SEM画像を図10に示すが、隣接する2つのマクロポアを区画する壁部は極めて細く棒状であるものの、連続マクロポア構造を有しており、水銀圧入法により測定したマクロポアとマクロポアが重なる部分の開口(メソポア)の平均直径は40μm、全細孔容積は18.2mL/gであった。
次いで、モノマーとしてスチレン216.6g、架橋剤としてジビニルベンゼン4.4g、有機溶媒として1-デカノール220g、重合開始剤として2,2’-アゾビス(2,4-ジメチルバレロニトリル)0.8gを混合し、均一になるように溶解させた(II工程)。
次に上記モノリス中間体を反応容器に入れ、このスチレン/ジビニルベンゼン/1-デカノール/2,2’-アゾビス(2,4-ジメチルバレロニトリル)混合物に浸漬させ、減圧チャンバー中で脱泡した後、反応容器を密封し、静置下50℃で24時間重合させた。重合終了後、内容物を取り出し、アセトンでソックスレー抽出した後、減圧乾燥した(III工程)。
製造したモノリスをカラム状反応器に入れ、塩化チオニル1600g、四塩化スズ400g、ジメトキシメタン2500mLを含む溶液を循環、通液して、30℃、5時間反応させ、クロロメチル基を導入した。反応終了後、クロロメチル化モノリスをTHF/水=2/1(vol)の混合溶媒で洗浄し、さらにTHFで洗浄し、クロロメチル化モノリスを得た。
次いで、クロロメチル化モノリスを減圧乾燥した。乾燥後のクロロメチル化モノリスの重量は8.4gであった。このクロロメチル化モノリスを、撹拌子を入れたセパラブルフラスコに入れ、第二級アミンとしてジメチルアミン50%水溶液56mL、THF180mLを含む溶液を、セパラブルフラスコに導入し、還流下、10時間撹拌した。反応終了後、生成物をメタノールで洗浄し、次いで純水で洗浄して弱塩基性モノリスアニオン交換体を得た。
製造した弱塩基性モノリスアニオン交換体を減圧乾燥した。乾燥後の弱塩基性モノリスアニオン交換体の重量は、8.7gであった。この乾燥状態の弱塩基性モノリスアニオン交換体を、撹拌子を入れたセパラブルフラスコに入れ、さらに酢酸パラジウム190mgの酢酸エチル溶液を導入し、室温(25±5℃)にて5日間撹拌し、モノリスアニオン交換体にパラジウムイオンを担持させた。このモノリスアニオン交換体をメタノールで洗浄し、さらに純水で洗浄した。得られたPdイオン担持モノリスアニオン交換体を、数回純水で洗浄した後、減圧乾燥により乾燥させた。得られたPdイオン担持モノリスアニオン交換体中のパラジウムの担持量をICP発光分析装置(日立ハイテクサイエンス製、PS3520UVDDII型)で求めたところ、パラジウム担持量は1重量%であった。
製造したPdモノリス弱アニオン交換体をφ4.6×30mmに成形し、φ4.6×150mmSUS製のカラムに充填し、次いで白金族金属捕捉材として上記で製造したモノリス弱アニオン交換体をφ4.6×120mmに成形し、Pdモノリス弱アニオン交換体を充填したSUS製カラムに充填して、白金族金属担持触媒カラムを作製した。
(白金族金属担持触媒カラムを用いた炭素-炭素結合形成反応)
芳香族ハロゲン化物として2-ブロモベンゾニトリル(5.82g、32.0mmol)と有機ホウ素化合物として4-メチルフェニルボロン酸(4.78g、35.2mmol)の4-メチルテトラヒドロピラン(4-MTHP)/エタノール(32mL,1:1(vol))溶液に、無機塩基として水酸化ナトリウム(35.2mmol)の水(22mL)溶液を加え撹拌した。この溶液を0.3mL/分で送液して、80℃に加熱した実施例1で作製した触媒カラム1内にPdモノリス弱アニオン交換体を充填した側から通液し、飽和塩化アンモニウム水溶液を蓄えたフラスコに回収した。得られた液の有機層をGC(島津製作所社製、GC-2000型)で分析した結果、転化率75%で2-シアノ-4’-メチルビフェニルを得た。
(白金族金属担持触媒カラムの作製)
実施例1で製造したPdモノリス弱アニオン交換体をφ4.6×30mmに成形し、φ4.6×30mmSUS製のカラムに充填して、白金族金属担持触媒カラムを製造した。
触媒カラム1を触媒カラム2にすること以外、実施例2と同様に炭素-炭素結合形成反応を行った結果、転化率37%で2-シアノ-4’-メチルビフェニルを得た。
Claims (8)
- 白金族金属担持触媒が充填容器内に充填されている白金族金属担持触媒カラムであって、
前記白金族金属担持触媒は、イオン交換体に、白金族金属ナノ粒子、白金族金属イオン、および白金族金属錯イオンのうち少なくとも1つが担持されている白金族金属担持触媒であり、
前記イオン交換体は、連続骨格相と連続空孔相とからなり、連続骨格の厚みは、1~100μmの範囲であり、連続空孔の平均直径は、1~1000μmの範囲であり、全細孔容積は、0.5~50mL/gの範囲であり、乾燥状態での重量当りのイオン交換容量は、1~9mg当量/gの範囲であり、イオン交換基がイオン交換体中に分布している非粒子状有機多孔質イオン交換体であり、
前記白金族金属ナノ粒子、白金族金属イオン、および白金族金属錯イオンのうち少なくとも1つの担持量は、乾燥状態で0.004~20重量%の範囲であり、
前記白金族金属担持触媒の後段に、白金族金属捕捉材が設置されていることを特徴とする白金族金属担持触媒カラム。 - 請求項1に記載の白金族金属担持触媒カラムであって、
前記白金族金属担持触媒は、前記イオン交換体に、白金族金属イオンおよび白金族金属錯イオンのうち少なくとも1つが担持されている白金族金属担持触媒であることを特徴とする白金族金属担持触媒カラム。 - 請求項1または2項に記載の白金族金属担持触媒カラムであって、
前記白金族金属捕捉材は、イオン交換体であることを特徴とする白金族金属担持触媒カラム。 - 請求項3に記載の白金族金属担持触媒カラムであって、
前記イオン交換体は、連続骨格相と連続空孔相とからなり、連続骨格の厚みは、1~100μmの範囲であり、連続空孔の平均直径は、1~1000μmの範囲であり、全細孔容積は、0.5~50mL/gの範囲であり、乾燥状態での重量当りのイオン交換容量は、1~9mg当量/gの範囲であり、イオン交換基がイオン交換体に分布している非粒子状有機多孔質イオン交換体であることを特徴とする白金族金属担持触媒カラム。 - (1)芳香族ハロゲン化物と有機ホウ素化合物との反応、(2)芳香族ハロゲン化物と末端にアルキニル基を有する化合物との反応、または(3)芳香族ハロゲン化物とアルケニル基を有する化合物との反応を行い、炭素-炭素結合を形成させる炭素-炭素結合形成方法であって、
前記芳香族ハロゲン化物と前記有機ホウ素化合物とを含有する原料液(i)、前記芳香族ハロゲン化物と前記末端にアルキニル基を有する化合物とを含有する原料液(ii)、または前記芳香族ハロゲン化物と前記アルケニル基を有する化合物とを含有する原料液(iii)を、請求項1~4のいずれか1項に記載の白金族金属担持触媒カラムに、導入経路より通液し、反応液を排出経路から排出することによって、炭素-炭素結合の形成反応を行うことを特徴とする炭素-炭素結合形成方法。 - 請求項5に記載の炭素-炭素結合形成方法であって、
無機塩基の存在下で、前記炭素-炭素結合の形成反応を行うことを特徴とする炭素-炭素結合形成方法。 - 請求項5または6に記載の炭素-炭素結合形成方法であって、
前記原料液(i)、前記原料液(ii)、または前記原料液(iii)が、水または親水性溶媒に、原料および無機塩基が溶解している無機塩基溶解原料液であり、
前記無機塩基溶解原料液を、前記白金族金属担持触媒カラムに、導入経路より通液し、反応液を排出経路から排出することによって、炭素-炭素結合の形成反応を行うことを特徴とする炭素-炭素結合形成方法。 - 請求項5または6に記載の炭素-炭素結合形成方法であって、
前記原料液(i)、前記原料液(ii)、または前記原料液(iii)が、疎水性の有機溶媒に原料が溶解している疎水性溶媒原料液であり、
前記疎水性溶媒原料液と、無機塩基が溶解している無機塩基水溶液と、の混合物を、前記白金族金属担持触媒カラムに、導入経路より通液し、反応液を排出経路から排出することによって、炭素-炭素結合の形成反応を行うことを特徴とする炭素-炭素結合形成方法。
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