WO2002098558A1 - Catalyseur de production d'un ester carboxylique et son procede de production correspondant - Google Patents
Catalyseur de production d'un ester carboxylique et son procede de production correspondant Download PDFInfo
- Publication number
- WO2002098558A1 WO2002098558A1 PCT/JP2002/005496 JP0205496W WO02098558A1 WO 2002098558 A1 WO2002098558 A1 WO 2002098558A1 JP 0205496 W JP0205496 W JP 0205496W WO 02098558 A1 WO02098558 A1 WO 02098558A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carrier
- gold
- catalyst
- carboxylic acid
- acid ester
- Prior art date
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 192
- 150000001733 carboxylic acid esters Chemical class 0.000 title claims abstract description 116
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims description 93
- 230000008569 process Effects 0.000 title description 2
- 239000010931 gold Substances 0.000 claims abstract description 293
- 229910052737 gold Inorganic materials 0.000 claims abstract description 264
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 234
- 239000002245 particle Substances 0.000 claims abstract description 162
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 98
- 239000001301 oxygen Substances 0.000 claims abstract description 69
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 69
- 239000002923 metal particle Substances 0.000 claims abstract description 67
- 150000001299 aldehydes Chemical class 0.000 claims abstract description 41
- 150000001298 alcohols Chemical class 0.000 claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract 6
- 238000006243 chemical reaction Methods 0.000 claims description 165
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 73
- STNJBCKSHOAVAJ-UHFFFAOYSA-N Methacrolein Chemical compound CC(=C)C=O STNJBCKSHOAVAJ-UHFFFAOYSA-N 0.000 claims description 48
- 125000004432 carbon atom Chemical group C* 0.000 claims description 19
- 229910052725 zinc Inorganic materials 0.000 claims description 17
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- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 229910052718 tin Inorganic materials 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 5
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- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 5
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- 229910052720 vanadium Inorganic materials 0.000 claims description 5
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- 239000011521 glass Substances 0.000 description 16
- 239000000126 substance Substances 0.000 description 16
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- 238000010304 firing Methods 0.000 description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 11
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- 239000002994 raw material Substances 0.000 description 11
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- 239000000463 material Substances 0.000 description 10
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- 238000007254 oxidation reaction Methods 0.000 description 10
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- 150000003839 salts Chemical class 0.000 description 10
- 235000010724 Wisteria floribunda Nutrition 0.000 description 9
- KQNKJJBFUFKYFX-UHFFFAOYSA-N acetic acid;trihydrate Chemical compound O.O.O.CC(O)=O KQNKJJBFUFKYFX-UHFFFAOYSA-N 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 9
- 150000007942 carboxylates Chemical class 0.000 description 9
- 238000005470 impregnation Methods 0.000 description 9
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 9
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 8
- JVTAAEKCZFNVCJ-UHFFFAOYSA-M Lactate Chemical compound CC(O)C([O-])=O JVTAAEKCZFNVCJ-UHFFFAOYSA-M 0.000 description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- 229910052786 argon Inorganic materials 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- 229910052797 bismuth Inorganic materials 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000002244 precipitate Substances 0.000 description 8
- 239000011541 reaction mixture Substances 0.000 description 8
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 7
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- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- RSYHZHSIXQDLOT-UHFFFAOYSA-N sodium;1,1,2,2-tetrachloroethene Chemical compound [Na].ClC(Cl)=C(Cl)Cl RSYHZHSIXQDLOT-UHFFFAOYSA-N 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 229940071240 tetrachloroaurate Drugs 0.000 description 1
- YGBFTDQFAKDXBZ-UHFFFAOYSA-N tributyl stiborite Chemical compound [Sb+3].CCCC[O-].CCCC[O-].CCCC[O-] YGBFTDQFAKDXBZ-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/057—Selenium or tellurium; Compounds thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/48—Silver or gold
- B01J23/52—Gold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/66—Silver or gold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/391—Physical properties of the active metal ingredient
- B01J35/393—Metal or metal oxide crystallite size
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/39—Preparation of carboxylic acid esters by oxidation of groups which are precursors for the acid moiety of the ester
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/39—Preparation of carboxylic acid esters by oxidation of groups which are precursors for the acid moiety of the ester
- C07C67/40—Preparation of carboxylic acid esters by oxidation of groups which are precursors for the acid moiety of the ester by oxidation of primary alcohols
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D313/00—Heterocyclic compounds containing rings of more than six members having one oxygen atom as the only ring hetero atom
- C07D313/02—Seven-membered rings
- C07D313/04—Seven-membered rings not condensed with other rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
- C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
- C07D319/12—1,4-Dioxanes; Hydrogenated 1,4-dioxanes not condensed with other rings
Definitions
- the present invention relates to a catalyst for producing a carboxylic acid ester and a method for producing a carboxylic acid ester.
- 4,518,796 discloses that ⁇ , / 3-unsaturated carboxylic acid esters are produced by the same reaction as described above in the presence of a catalyst comprising an intermetallic compound consisting of palladium and bismuth. A method for doing so is disclosed. There is also known a method of producing a carboxylic acid ester by reacting an aldehyde with an alcohol in the presence of a catalyst comprising gold supported on a hydrophobic carrier such as activated carbon (Japanese Patent Application Laid-Open No. 2000-154164).
- a method of producing a carboxylic acid ester using an alcohol as a starting material in the presence of oxygen is also known.
- a method has been proposed in which an intermetallic compound containing at least one selected from lead, mercury, thallium and bismuth and palladium is used as a catalyst (Japanese Patent Publication No. 62-7903).
- a main object of the present invention is to provide a catalyst for producing a carboxylate ester which has more excellent catalytic activity.
- the present inventor has conducted intensive studies in order to solve the problems of the prior art, and as a result, has found that a specific material can achieve the above object, and has completed the present invention. That is, the present invention relates to the following carboxylic acid ester production catalyst and carboxylic acid ester production method.
- a catalyst for the production of a carboxylic acid ester wherein 1) ultrafine gold particles having an average particle diameter of 6 nm or less and / or 2) ultrafine metal particles containing gold and a second element other than gold are supported on a carrier.
- the second element is at least one of Group 2B, Group 3B, Group 4B, Group 5B and Group 6B of Periodic Tables 4 to 6 and Group 8 of Periodic Table 4th Period 2.
- the catalyst for producing a carboxylic acid ester according to the above item 1.
- the carrier is Si, Mg, Ca, Sr, Ba, Al, Ti, V, Cr, Mn, 2.
- the catalyst for producing a carboxylic acid ester according to the above item 1, comprising an oxide containing at least one of Fe, Co, Ni, Cu, Zn, Zr, Nb, Sn, Pb, La and Ce.
- the catalyst for producing a carboxylic acid ester of the present invention comprises a) a reaction for producing a carboxylic acid ester by reacting oxygen, an aldehyde and an alcohol, or b) a carboxylic acid reaction by reacting oxygen with one or more alcohols.
- a catalyst used in a reaction for producing an acid ester wherein 1) ultrafine gold particles having an average particle diameter of 6 nm or less and / or 2) metal particles containing gold and a second element other than gold are supported on a carrier. It is.
- the ultrafine gold particles 1) and the ultrafine metal particles 2) may be collectively referred to as “particles of the present invention”.
- the particles of the present invention have an average particle diameter of 6 nm or less, particularly preferably 5 nm or less. By setting the average particle size to 6 nm or less, more excellent catalytic activity can be achieved.
- the lower limit of the average particle size is not particularly limited, but is physically stable. It should be about 1 nm from the viewpoint of sex.
- the average particle diameter of the particles of the present invention is determined by observing the particles on the carrier by observation with a transmission electron microscope (TEM). The arithmetic mean value of the particle diameter of 100 particles excluding the total of 20 particles from the bottom 10 is shown.
- the maximum value of the particle size distribution of the particles of the present invention is preferably in the range of 1 to 6 nm, particularly preferably in the range of 1 to 5 nm.
- Standard Deviation is preferably 2 or less, particularly preferably 1.5 or less.
- the ultrafine gold particles of the above 1) are substantially made of gold. Other elements or impurities may be contained within a range that does not impair the effects of the present invention.
- the metal ultrafine particles of the above 2) are mainly composed of at least Au as the first element and a second element other than Au.
- each individual metal particle contains both the first element and the second element.
- gold and the second element may form an alloy or an intermetallic compound. Elements other than gold and the second element or impurities may be contained within a range not to impair the effects of the present invention.
- an element other than Pd is preferable.
- groups 2B and 3B in the 4th to 6th periods of the Periodic Table (“Chemical Analysis Handbook Revised 5th Edition” Maruzen (2001)) , 4B, 5B, and 6B, and at least one of the 8th groups in the fourth period can be suitably used.
- Zn, Cd, Hg as Group 2B (zinc group), Ga, In, T1, Group 3B (boron group), Ge, Sn, Pb, 5B as Group 4B (carbon group) As (nitrogen group), As, Sb, Bi, 6B (oxygen group), Se, Te, Po, etc., and as group 8 (iron group), Fe, Co, Ni, etc. can be exemplified.
- a catalyst in which metal particles containing Au and Pb are supported on a carrier can be suitably used as the catalyst of the present invention.
- those used as a conventional catalyst carrier used in the production of carboxylic acid esters or commercially available products can be used, and there is no particular limitation. Further, those obtained by a known production method can also be used. For example, metal oxides (silica, alumina, titania, zirconia, magnesia, etc.), composite metal oxides (silica Mina, titania-silica, silica-magnesia, etc., zeolite (ZSM-5, etc.), mesoporous silicide (MCM-41, etc.), natural minerals (clay, diatomaceous earth, pumice, etc.), carbon materials (activated carbon, graphite, etc.) Various carriers can be mentioned.
- an inorganic oxide carrier is preferred.
- An inorganic oxide carrier composed of an oxide containing at least one element of La, Ce and Ce can be preferably used.
- the oxide may be a mixed oxide in which two or more oxides of a single element are mixed, or may be a double oxide (or a double oxide).
- the inorganic oxide carrier Mg, Ca, Sr, Ba, Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Sn, An oxide containing at least one of Pb, La, and Ce and Si can be preferably used.
- the production method of the inorganic oxide carrier is not limited, and a known production method can be used. Examples include an impregnation method, a coprecipitation method, an ion exchange method, a vapor deposition method, a kneading method, and a hydrothermal synthesis method.
- such inorganic oxide supports include Mg, Ca, Sr, Ba, A, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Sn, It is obtained by impregnating silica with an aqueous solution of a water-soluble compound containing at least one of Pb, La and Ce, and then calcining the obtained impregnated body.
- Such an inorganic oxide carrier can more firmly support the particles of the present invention, which are a catalytically active component, in the form of ultrafine particles, so that a synergistic action with the particles of the present invention can provide a much higher catalytic activity. By improving the physical stability of the ultrafine particles and preventing particle growth and exfoliation, the effect of increasing the catalyst life can be obtained.
- the compound used in the above production method is not limited. Examples include inorganic compounds such as nitrates, sulfates, and hydroxides, and organic compounds such as carboxylate, alkoxide, and acetyl acetonate.
- the water-soluble compound is not limited as long as it is water-soluble.
- examples thereof include inorganic acid salts such as zinc nitrate, lanthanum nitrate, iron nitrate, nickel nitrate, and aluminum nitrate; and organic acid salts such as lead acetate and magnesium acetate. These salts are anhydrous Alternatively, any of hydrates may be used.
- concentration of the aqueous solution can be appropriately set according to the type of the water-soluble compound used.
- the amount by which the aqueous solution is impregnated into silica is not limited, but is usually about 1 to 20 parts by weight per 100 parts by weight of silica.
- the carrier is preferably porous, and more preferably the specific surface area (BET method) is usually 50 m 2 Zg or more, particularly preferably 10 On ⁇ Zg or more. Is not limited and may be determined as appropriate according to the use of the final product.
- the loading amount of the particles of the present invention may be appropriately determined according to the use of the final product, the type of the carrier, and the like. It is preferable to use parts by weight.
- the method for producing the catalyst of the present invention is not limited as long as the particles of the present invention can be supported.
- a known method such as a coprecipitation method, a precipitation / precipitation method, an impregnation method, or a vapor deposition method can be used.
- a coprecipitation method, a precipitation precipitation method, or the like can be suitably used as a supporting method, and a precipitation precipitation method is more preferable.
- ultrafine gold particles or metal particles can be supported by the following method.
- the gold-containing water-soluble compound is not limited as long as it is water-soluble.
- tetra black mouthpiece (III) acid “H [AuC 1 4]
- sodium tetrachloroethene mouthpiece (III) acid “Na [AuC 1 4)”
- Jishiano gold (I) potassium “K [Au (CN) 2)
- a gold compound such as gold cyanide (I); At least one of these compounds can be used.
- the gold concentration of the above aqueous solution varies depending on the kind of the compound to be used and the like, but it may be usually about 0.1 to 10 Ommo 1 ZL.
- the pH of the aqueous solution is usually set to about 5 to 10, preferably 6 to 9.
- the pH can be adjusted with an alkali such as sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, ammonia and the like. If necessary, an acid such as hydrochloric acid can be used. These alkalis or acids may be used in the form of an aqueous solution, if necessary.
- a surfactant can be added to the aqueous solution.
- the surfactant may be appropriately selected from known ones or commercially available ones according to the aqueous solution.
- anionic surfactants such as long-chain alkyl sulfonic acids and salts thereof, long-chain alkyl benzene sulfonic acids and salts thereof, long-chain alkyl carboxylic acids and salts thereof, aryl carboxylic acids and salts thereof;
- cationic surfactants such as polyammonium salts; and nonionic surfactants such as polyalkylene glycol and polyoxyethylene nonylphenol. At least one of these surfactants can be used.
- an anionic surfactant and a nonionic surfactant are preferred, and an anionic surfactant is particularly preferred.
- anionic surfactants among others, long-chain alkyl sulfonic acids having 8 or more carbon atoms and salts thereof, long-chain alkylbenzene sulfonic acids having 8 or more carbon atoms and salts thereof, long-chain alkyl carboxylic acids having 8 or more carbon atoms and Salts thereof, aryl carboxylic acids and salts thereof are more preferred.
- the amount of the surfactant to be used can be appropriately determined depending on the desired dispersibility, the type of the surfactant to be used, and the like.However, usually, when the concentration of the surfactant is about 0.1 to 10 mmol ZL, good.
- the carrier to be mixed with the above aqueous solution may be used in any form such as granules and granules.
- the amount of the carrier to be used may be appropriately set according to the concentration of the aqueous solution, the type of the carrier to be used, and the like.
- the aqueous solution may be heated as necessary. The temperature in this case is usually about 30 to 100, preferably 50 to 95.
- a solid content is recovered.
- the method for collecting the solid content is not limited.
- the solid content can be collected by collecting the supernatant or according to a known solid-liquid separation method. The collected solid is preferably washed with ion-exchanged water or the like until the residual ions are substantially eliminated.
- the solid content (gold immobilized material) is fired. If necessary, it may be heated to a predetermined temperature and dried before firing.
- the drying temperature should usually be less than 150.
- the firing temperature is usually about 150 to 800, preferably 200 to 700, and most preferably 250 to 600. What is necessary is just to set suitably so that predetermined ultrafine gold particles may be obtained within this temperature range.
- the firing atmosphere may be air (air) or an oxidizing atmosphere, or may be any of an inert gas atmosphere such as argon gas and helium, and a reducing atmosphere such as hydrogen gas. Further, the firing time may be appropriately determined depending on the firing temperature, the size of the solid content, and the like. By such calcination, the catalyst of the present invention can be obtained.
- the carrier containing at least one of gold and its compound and at least one of the second element and its compound may be any of a hydroxide, a chloride, a carbonate, a nitrate, an alkoxide, and an acetyl acetonate salt.
- the order in which gold and the second element are supported on the carrier is not limited, and either of them may be performed first or simultaneously. That is, any of the following production methods (A) to (C) can be used. That is, (A) a method of supporting the second element after supporting gold on the carrier, (B) a method of supporting gold after supporting the second element on the carrier, and (C) a method of supporting gold with the second element. Can be simultaneously applied to a carrier. Hereinafter, each method will be described.
- the method (A) is a method in which gold is supported on a carrier and then a second element is supported.
- a gold carrier carrying gold is manufactured.
- the production method of the gold carrier is not limited, For example, conventional methods such as a coprecipitation method, a precipitation method, an impregnation method, and a vapor deposition method can be applied.
- a coprecipitation method, a precipitation method and the like are preferable, and among them, the precipitation method is more preferable.
- the method described in 1) above can be applied.
- the second element and its compound is supported on a gold support, and then heat-treated to form a composite of gold and the second element.
- the above supporting method is not limited, and can be performed according to a conventional method.
- an impregnation method, an ion exchange method, a vapor deposition method and the like can be mentioned.
- the impregnation method can be suitably used.
- the solid content recovered from the mixture is subjected to a heat treatment, so that the second element can be suitably supported.
- Examples of the compound containing the second element include, but are not particularly limited to, inorganic compounds such as nitrates, sulfates, hydroxides, and chlorides, and organic compounds such as formates, acetates, -diketone compounds, and alkoxides. Can be. More specifically, there may be mentioned lead acetate, zinc acetate, zinc nitrate, bismuth nitrate, germanium (III) butoxide, nickel piacetyl acetate, iron acetate and the like.
- the solution in which the compound containing the second element is dissolved can be prepared by using a combination of the compound containing the second element and a solvent in which the compound is dissolved.
- the solvent is not particularly limited, but water, an organic solvent, and the like can be used.
- the organic solvent include alcohol. Ketones, aromatic hydrocarbons, carboxylic esters, nitriles and the like can be mentioned.
- a solution in which lead acetate is dissolved in methanol can be suitably used.
- the concentration of the second element in the solution in which the compound containing the second element is dissolved can be appropriately determined according to the type of the compound, the type of the solvent, and the like, but is usually about 0.01 to 10 mmol ZL. Good.
- the mixing ratio of the gold support and the solution in which the compound containing the second element is dissolved can be appropriately determined according to the concentration of the solution, the desired amount of gold or the second element to be supported, and the like. .
- a mixture of the gold carrier and a solution in which the compound containing the second element was dissolved was prepared. Thereafter, the solid content is recovered from the mixture.
- the method for recovering the solid content is not limited.
- the compound containing the second element may be supported on a gold carrier.
- the heat treatment temperature may be a temperature at which each of the obtained metal particles is composed of gold and the second element. That is, the heat treatment may be performed so that when the metal-containing composition finally obtained is used as a catalyst, catalytic activity due to the compounding of gold and the second element is exhibited.
- the heat treatment temperature varies depending on the type of the second element and the like, but is generally about 50 to 800, preferably 100 to 600.
- the heat treatment time can be changed as appropriate depending on the temperature of the heat treatment and the like, but is usually about 10 minutes to 24 hours.
- the heat treatment atmosphere is not particularly limited, and may be any of a reducing atmosphere, an oxidizing atmosphere, and an inert atmosphere.
- a reducing atmosphere for example, a reducing gas such as hydrogen, carbon monoxide, or alcohol, or a mixed gas obtained by diluting the reducing gas with an inert gas such as nitrogen, helium, or argon is used. Good.
- a gas containing oxygen, air, or the like may be used.
- an inert gas such as nitrogen, helium, or argon may be used.
- a reducing atmosphere is particularly desirable. After the heat treatment in an oxidizing atmosphere, the heat treatment can be performed in a reducing atmosphere.
- the solid content is reduced using a reducing agent such as formalin, hydrazine, sodium borohydride, or formic acid prior to the above heat treatment in order to further promote complexation with gold. May be.
- a reducing agent such as formalin, hydrazine, sodium borohydride, or formic acid prior to the above heat treatment in order to further promote complexation with gold. May be.
- the method (B) is a method in which the second element is supported on a carrier, and then gold is supported.
- the method for supporting the second element is not limited, and for example, the same method as in the above (A) can be used. That is, first, the second element may be supported on the carrier in the same manner as in the above (A).
- the raw material of the second element, supporting conditions, and the like may be the same as those described in (A) above.
- the second element can be firmly fixed to the carrier.
- Loading of gold on the second element carrier thus produced can be carried out in the same manner as in the above (A). That is, after supporting gold by a precipitation precipitation method or the like, drying and firing may be performed in the same manner as in the above (A). Further, as in the case of the above (A), it is desirable to perform a heat treatment in a reducing atmosphere similar to the above (A), in order to more sufficiently combine the gold and the second element. If necessary, a reduction treatment using a reducing agent can be further combined.
- the method (C) is a method in which gold and the second element are simultaneously supported on a carrier.
- the method is not limited as long as both can be supported at the same time.
- conventional methods such as a coprecipitation method, a precipitation method, an impregnation method, and a vapor deposition method can be used.
- gold when gold is supported on the carrier, both can be supported simultaneously by allowing the compound containing the second element to coexist in the system.
- the material carrying both of them is subjected to heat treatment and heat treatment or reduction treatment in the same manner as in the above method (A) or (B), whereby the metal ultrafine particles containing gold and the second element are carried on the carrier.
- An inventive catalyst can be obtained.
- a precipitation precipitation method or an impregnation method can be suitably used.
- the compound is deposited as a gold-containing compound (for example, a hydroxide) and easily precipitates (for example, when the compound is a hydroxide, the temperature is 30 to 100 t :, pH At 5 to 10 and a gold concentration of 0.1 to 100 mmol / L), it is desirable to control so that the compound containing the second element precipitates to form a precipitate.
- the hydroxide of each of the gold and the second element forms a precipitate at the same time as the formation of the precipitate, thereby producing a hydroxide containing both the gold and the second element.
- the catalyst of the present invention can be obtained by subjecting these precipitates to a heat treatment and a Z or reduction treatment.
- a carrier is added to a solution in which a gold compound and a compound containing a second element are dissolved in an organic solvent, and the organic solvent is distilled off if necessary.
- the catalyst of the present invention can be obtained by simultaneously depositing a compound containing two elements on a support and then performing a heat treatment and a Z or reduction treatment.
- a typical example is a methanol solution containing a gold acetylacetonate compound (eg, dimethyl gold acetylacetonate) and a second element acetyl acetonate compound (eg, nickel acetylacetonate).
- the catalyst of the present invention can be obtained.
- the contents disclosed in the above 1) or 2) can be applied to the raw material compounds, operating conditions, and the like used in the above-mentioned precipitation precipitation method or impregnation method.
- the catalyst of the present invention can be suitably used for producing carboxylic acid esters. Specifically, it is used for a) a reaction for producing a carboxylic acid ester by reacting oxygen, an aldehyde and an alcohol or b) a reaction for producing a carboxylic acid ester by reacting oxygen with one or more alcohols. be able to.
- reaction a it can be suitably used, for example, when producing methyl methyl acrylate using methacrolein and methanol, or when producing methyl dalioxylate using glyoxal and methanol.
- the reaction b) can be suitably used, for example, when producing methyl methacrylate using methallyl alcohol and methanol, or when producing methyl glycolate using ethylene glycol and methanol.
- the surface of the catalyst may be subjected to an organic silylation treatment.
- an organic silylation treatment By such treatment, it is possible to improve the catalyst performance, improve the life stability, and the like.
- a known method can be applied to the organic silylation treatment itself.
- the organic silylation treatment can be performed by a gas phase method or a liquid phase method using a silylating agent such as methoxytrimethylsilane, trimethylsilyl chloride, hexamethyldisilazane, or the like. good.
- the method for producing a carboxylic acid ester of the present invention comprises the following steps: 1) a method for producing a carboxylic acid ester by reacting an aldehyde with an alcohol in the presence of oxygen (first method) Method) and 2) a method (second method) of producing a carboxylic acid ester by reacting one or more alcohols with oxygen.
- a carboxylic acid ester in the first method, can be suitably produced by reacting oxygen, aldehyde and alcohol in the presence of the catalyst of the present invention.
- aldehyde examples include aliphatic aldehydes having 1 to 10 carbon atoms such as formaldehyde, acetaldehyde, propionaldehyde, isobutyraldehyde, dalioxal, and pyrvic aldehyde; and 3 carbon atoms such as acrolein, methacrolein, and crotonaldehyde.
- a to j 10 -a, j3-unsaturated aldehydes aromatic aldehydes having 6 to 20 carbon atoms such as benzaldehyde, dalioxal, p-methoxybenzaldehyde, tolualdehyde and phthalaldehyde, and derivatives of these aldehydes Is mentioned.
- aromatic aldehydes having 6 to 20 carbon atoms such as benzaldehyde, dalioxal, p-methoxybenzaldehyde, tolualdehyde and phthalaldehyde, and derivatives of these aldehydes Is mentioned.
- aliphatic aldehyde, ⁇ , / 3-unsaturated aldehyde and the like can be used.
- One or more of these aldehydes can be used.
- the alcohol examples include aliphatic alcohols having 1 to 10 carbon atoms such as methanol, ethanol, isopropanol, and octanol; diols having 2 to 10 carbon atoms such as ethylene glycol and butane diol; Examples thereof include aliphatic unsaturated alcohols having 3 to 10 carbon atoms, such as ril alcohol, and aromatic alcohols, such as benzyl alcohol.
- an aliphatic alcohol having 1 to 10 carbon atoms can be used.
- the above-mentioned aldehyde and alcohol may be appropriately selected depending on the kind of the target carboxylic acid ester and the like. For example, when producing methyl methacrylate, methacrolein may be used as the aldehyde and methanol may be used as the alcohol.
- the reaction ratio of the aldehyde and the alcohol is not particularly limited, the molar ratio of the aldehyde alcohol is preferably about 10 to 1200, and more preferably ⁇ ⁇ , ⁇ 0. When the content is within the above range, it becomes possible to produce the carboxylic acid ester more efficiently.
- the reaction of an aldehyde and an alcohol is carried out with a catalyst comprising the composition of the present invention. Performed in the presence of oxygen (molecular oxygen).
- the above reaction may be any of a liquid phase reaction, a gas phase reaction and the like.
- Oxygen oxygen gas
- Oxygen gas may be diluted with an inert gas such as nitrogen gas, argon gas, helium gas, or carbon dioxide gas.
- an oxygen-containing gas such as air can be used.
- the method of supplying oxygen to the reaction system is not particularly limited, and a known method can be applied. In particular, a method of publishing into a liquid is preferable.
- the form of the above reaction may be any of a continuous system, a batch system, a semi-batch system and the like, and is not particularly limited.
- a batch type catalyst is used as the reaction mode, the catalyst may be charged together with the raw materials into the reactor.
- the catalyst may be charged into the reactor in advance, or the catalyst may be continuously charged together with the raw material in the reactor.
- the catalyst may be in any form such as a fixed bed, a fluidized bed and a suspension bed.
- the amount of the catalyst used may be appropriately determined according to the combination of the aldehyde and the alcohol, the type of the catalyst (composition, etc.), the reaction conditions, and the like.
- the reaction time is not particularly limited, and varies depending on the set conditions. Usually, the reaction time or the residence time (the amount of liquid retained in the reactor and the amount of liquid supplied) may be about 0.5 to 20 hours.
- reaction temperature is usually about 0 to 180, preferably 20 to 150. By setting the temperature within this range, the reaction can proceed more efficiently.
- the reaction pressure may be any of reduced pressure, normal pressure, or pressurized pressure, but is usually within a range of 0.05 to 5 MPa (gauge pressure), particularly preferably 0.1 to 2 MPa.
- the pH of the reaction system is desirably about 6 to 9 from the viewpoint of suppressing by-products.
- an alkali metal compound or an alkaline earth metal compound (carboxylate) can also be used as an additive to the reaction system.
- the generated carboxylic acid ester may be recovered using a known separation and purification means.
- the catalyst may be separated according to a known method. For example, when the reaction system is composed of a catalyst (solid content) and a reaction product (liquid component), the catalyst and the reaction product are separated by a known solid-liquid separation method such as filtration and centrifugation. Can be separated.
- carboxylate obtained by the production method of the present invention can be used for the same applications as the carboxylate obtained by the prior art.
- carboxylic acid esters such as acrylic acid esters and methacrylic acid esters are useful as monomers for polymerization as raw materials for various acrylic resins.
- a carboxylic acid ester in the second method, can be suitably produced by reacting one or more alcohols with oxygen in the presence of the catalyst of the present invention.
- the alcohol is not limited as long as it produces a carboxylic acid ester by reaction with oxygen, and a known alcohol used as a raw material for producing a carboxylic acid ester can also be used.
- the alcohol may be a monohydric alcohol or a polyhydric alcohol.
- the alcohol is preferably a primary alcohol.
- the polyhydric alcohol may contain a secondary alcohol in the molecule as long as it contains one or more primary alcohols in the molecule. That is, the polyhydric alcohol preferably contains one or more primary alcohols in the molecule.
- these alcohols include aliphatic alcohols having 1 to 10 carbon atoms, such as methanol, ethanol, n-propanol and octanol; 1,2-ethanediol, 1,2-propanediol, and 1,3-propane.
- Polyhydric alcohols having 2 to 10 carbon atoms such as cellulose, erythritol and sorbitol; alcohols having 2 to 10 carbon atoms having an ether bond in the molecule, such as diethylene glycol and triethylene glycol; aryl alcohol, methallyl alcohol And aliphatic alcohols having 3 to 10 carbon atoms; aromatic alcohols such as benzyl alcohol.
- polyhydric alcohols having 2 to 10 carbon atoms are preferable, and it is particularly preferable to use at least ethylene glycol or 1,2-propylene glycol.
- the target carboxylic acid ester can be obtained by specifying the type of the alcohol as a raw material. That is, alcohol What is necessary is just to select suitably according to the kind of the target carboxylic acid ester, etc.
- methyl glycolate ethylene glycol and methanol
- the amount of each alcohol used may be appropriately determined according to each reaction.
- the molar ratio between ethylene glycol and methanol may be 1: 1.
- the method of using the catalyst of the present invention, the reaction conditions, the purification method, and the like may be carried out in the same manner as in the first method. Further, the obtained carboxylic acid ester can be used for various applications as in the first method.
- the catalyst of the present invention is, in particular, 1) ultrafine gold particles having an average particle diameter of 6 nm or less, or 2) metal particles containing gold and a second element other than gold are supported on a carrier.
- a catalyst for producing a carboxylic acid ester it can exhibit catalytic activity superior to the conventional one. Moreover, even when used repeatedly, the performance is not easily degraded as in the prior art, and relatively high activity can be maintained.
- the components of the reaction product in the reaction solution were quantitatively analyzed by gas chromatography and / or liquid chromatography.
- A number of moles of charged aldehyde or charged alcohol
- B number of moles of remaining aldehyde or remaining alcohol
- C number of moles of aldehyde or alcohol consumed according to the number of moles of carboxylic acid ester formed. Show the number of moles respectively.
- the pH was adjusted to 7 using a 0.5 N aqueous sodium hydroxide solution while maintaining 500 ml of an aqueous solution of chloroauric acid having a concentration of 1 Ommo 1 ZL at 65 to 7 Ot :.
- aqueous solution 40 g of commercially available alumina (product name “AC-12R” manufactured by Sumitomo Chemical Co., Ltd.) was added with stirring, and stirring was continued for 1 hour while maintaining the temperature at 65 to 70. Thereafter, the supernatant was removed by standing still, 0.8 L of ion-exchanged water was added to the remaining gold immobilized substance, and the mixture was stirred at room temperature for 5 minutes, and then the washing step of removing the supernatant was repeated three times.
- AC-12R commercially available alumina
- the gold-immobilized product obtained by filtration was dried at 100 for 10 hours, and then calcined in air at 300 for 3 hours to obtain a gold carrier (Au / alumina) in which gold was supported on an alumina carrier.
- a gold carrier Au / alumina
- gold was 4.6% by weight with respect to the carrier.
- gold particle size of this carrier gold was almost highly dispersed with a particle size of 5 nm or less, and showed a narrow particle size distribution with a local maximum at a particle size of 2-3 nm. It was confirmed that the average particle size was 5 nm or less.
- a carboxylic acid ester was produced using the gold carrier obtained in the above (1) as a catalyst.
- 1.5 ml of methacrolein, 15 ml of methanol and 0.5 g of the above gold carrier were placed in a 100 ml autoclave with rotary stirring, and sealed.
- the system was pressurized to 0.2 MPa with oxygen, heated to 80 with stirring, and maintained at this temperature for 2 hours. Thereafter, the mixture was cooled, opened, the catalyst and the reaction solution were separated by filtration, and the reaction solution was analyzed.
- the conversion of methacrolein was 88%, the selectivity and the yield of methyl methacrylate were 85% and 75%, respectively.
- Methyl methyl acrylate formation activity per unit catalyst weight was 13.6 mol 1 ZhZkg g catalyst.
- a gold carrier (Au-alumina) was produced in the same manner as in Example 1-1 except that the firing temperature of the gold-immobilized product was set to 40 O :. As a result of measuring the amount of gold carried on this carrier, it was 4.6% by weight with respect to the carrier. In addition, as a result of examining the gold particle size of this carrier, almost all of the gold was highly dispersed with a particle size of 5 nm or less, and showed a narrow particle size distribution with a maximum near the particle size of 2 to 3 nm. It was confirmed that the particle size was 5 nm or less. Using this gold carrier, a carboxylic acid ester was produced in the same manner as in Example 11-11.
- a gold carrier (Au / alumina) was manufactured in the same manner as in Example 1-1 except that the firing temperature of the gold-immobilized product was set to 600. As a result of measuring the amount of gold carried on this carrier, it was 4.6% by weight with respect to the carrier. In addition, as a result of examining the gold particle diameter of this support, it was confirmed that most of the gold was highly dispersed with a particle diameter of 3 to 6 nm, and the average particle diameter was 6 nm or less.
- a gold carrier (Au alumina) was produced in the same manner as in Example 1-1, except that the firing temperature of the gold-immobilized product was 700. As a result of measuring the amount of gold carried on this carrier, it was 4.6% by weight with respect to the carrier. In addition, as a result of examining the gold particle diameter of this carrier, it was confirmed that most of the gold had a particle diameter exceeding 6 nm, and the average particle diameter exceeded 6 nm.
- a gold carrier (AuZr-alumina) was produced in the same manner as in Example 1-1, except that the firing temperature of the gold-immobilized product was 800. As a result of measuring the amount of gold carried on this carrier, it was 4.6% by weight with respect to the carrier. In addition, as a result of examining the gold particle diameter of this carrier, it was confirmed that almost all of the gold had a particle diameter exceeding 6 nm, and the average particle diameter exceeded 6 nm.
- Example 11 Using this gold carrier, a carboxylic acid ester was produced in the same manner as in Example 11-11. As a result of analyzing the resulting reaction solution, the conversion of methacrolein was 18%, the selectivity and yield of methyl methacrylate were 42% and 8%, respectively, and the activity of forming methyl methacrylate per unit catalyst weight was 1.4 mol. Zh / kg—catalyst.
- the pH was adjusted to 7 with 0.5 N aqueous sodium hydroxide while maintaining 1 L of aqueous chloroauric acid at a concentration of 1 Ommo 1 ZL at 65-70.
- 10 g of the above-mentioned A1-silica carrier was added to this aqueous solution with stirring, and stirring was continued for 1 hour while maintaining the solution at 65 to 7O :. Thereafter, the supernatant is removed by standing still, 0.8 L of ion-exchanged water is added to the remaining immobilized gold, and the mixture is stirred at room temperature for 5 minutes. The washing step of removing the supernatant is repeated three times. Repeated.
- the gold-immobilized product obtained by filtration was dried at 100 for 10 hours, and then calcined in air at 400 for 3 hours to obtain a gold support (AuZAl / Silica) was obtained.
- a gold support AuZAl / Silica
- As a result of measuring the amount of gold carried on this carrier it was 4.5% by weight with respect to the carrier.
- the A1 content was 4.5% by weight in the carrier.
- As a result of adjusting the gold particle diameter of the carrier almost all of the gold was highly dispersed with a particle diameter of 5 nm or less, and showed a narrow particle diameter distribution having a local maximum near the particle diameter of 2 to 3 nm. It was confirmed that the average particle size was 5 nm or less.
- Example 1-4 The same procedure as in Example 1-4 was repeated except that a methanol solution containing 3.55 g of titanium tetra-n-butoxide was used instead of the aqueous solution containing 7.03 g of aluminum nitrate nonahydrate.
- a gold carrier (AuZT i Si force) carrying gold was obtained.
- As a result of measuring the amount of gold carried on this carrier it was found that 4. It was 8% by weight. Further, the Ti content was 4.9% by weight in the carrier.
- the gold particle diameter of the carrier it was confirmed that almost all of the gold was highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was 5 nm or less.
- Example 4 The same procedure as in Example 4 was repeated except that zinc nitrate hexahydrate 2.28 g was used instead of aluminum nitrate 9-hydrate 7.03 g.
- a support (Au / Zn / silica) was obtained.
- the amount of gold carried on this carrier it was 4.5% by weight with respect to the carrier.
- the Zn content was 5.0% by weight in the carrier.
- the gold particle diameter of this carrier it was confirmed that almost all of the gold was highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was 5 nm or less.
- a carboxylic acid ester was produced in the same manner as in Example 14 using the gold carrier.
- the conversion of methacrolein was 97%
- the selectivity and yield of methyl methacrylate were 91% and 88%, respectively
- the methyl methacrylate formation activity per unit catalyst weight was 16.0 molZhZkg—catalyst. .
- Example 14 The same procedure as in Example 14 was repeated except that zinc nitrate hexahydrate 2.28 g was replaced by lanthanum nitrate hexahydrate 1.56 g.
- a support (AuZLa silica) was obtained.
- AuZLa silica As a result of measuring the amount of gold carried on this carrier, it was 4.8% by weight based on the carrier.
- the La content was 5.0% by weight in the carrier.
- the gold particle diameter of this carrier it was confirmed that almost all of the gold was highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was 5 nm or less.
- Gold was supported on a Ce-silica carrier in the same manner as in Example 1-1, except that 1.49 g of cerium nitrate pentahydrate was used instead of 7.03 g of aluminum nitrate nonahydrate.
- a gold carrier Au / CeZ silica
- Au / CeZ silica As a result of measuring the amount of gold carried on this carrier, it was 4.8% by weight based on the carrier.
- the Ce content was 4.9% by weight in the carrier.
- As a result of examining the gold particle diameter of this support it was confirmed that almost all of the gold was highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was 5 nm or less.
- Example 1-4 Using the above gold carrier, a carboxylic acid ester was produced in the same manner as in Example 1-4. As a result, the conversion of methacrolein was 64%, the selectivity and yield of methyl methacrylate were 87% and 56%, respectively, and the activity of forming methyl methacrylate per unit catalyst weight was 10.1mo1 / hZkg-catalyst. .
- Example 1-4 Aluminum nitrate nonahydrate 7.03 g was replaced with 0.92 g of lead acetate trihydrate and 1.76 g of magnesium acetate tetrahydrate in the same manner as in Example 1-4.
- a gold carrier (A1 ?? 13- ⁇ 18 silica) in which gold was supported on a Pb-MgZ silica carrier was obtained.
- the amount of gold carried on the carrier was measured, and as a result, was 4.8% by weight based on the carrier.
- the 13 and 1 ⁇ 8 contents were 5.0 wt% and 2.0 wt%, respectively, in the carrier. Further, as a result of examining the gold particle diameter of this carrier, it was confirmed that gold was almost highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was 5 nm or less.
- a carboxylic acid ester was produced in the same manner as in Example 14 using the gold carrier.
- the conversion of methacrolein was 83%
- the selectivity and yield of methyl methacrylate were 92% and 81%, respectively
- the activity of forming methyl methacrylate per unit catalyst weight was 13.9 mol / hZkg-catalyst.
- Example 17 In Example 17, except that lanthanum nitrate hexahydrate was changed from 1.56 g to 3.12 g and the amount of La-silica used was changed from 10 g to 5 g.
- a gold carrier AuZLa / silica
- AuZLa / silica gold carrier in which gold was supported on a La-silica carrier was obtained.
- the amount of gold carried on this carrier it was 8.4% by weight based on the carrier.
- the La content was 10.1% by weight in the carrier.
- As a result of examining the gold particle diameter of this carrier it was confirmed that almost all of the gold was highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was 5 nm or less.
- a carboxylic acid ester was produced in the same manner as in Example 1-4, except that the above-mentioned gold support was used, and the oxygen pressure in the system was set to 0.3 MPa and the reaction time was set to 1 hour. As a result, the conversion of methacrolein was 98%, the selectivity and yield of methyl methacrylate were 93% and 91%, respectively, and the activity of forming methyl methacrylate per unit catalyst weight was 33. Omo 1 ZhZkg-catalyst.
- Example 1 Production of a carboxylic acid ester was carried out in the same manner as in Example 1-10, except that the gold support obtained in Example 1-10 was used as a catalyst, and 3.0 ml of methacrolein and 12 ml of methanol were used. did. As a result, the conversion of methacrolein was 78%, the selectivity and yield of methyl methacrylate were 89% and 69%, respectively, and the methyl methacrylate-forming activity per unit weight of the catalyst was 50.4mo IZh / kg-catalyst. .
- Example 11 Production of a carboxylic acid ester was carried out in the same manner as in Example 1-10, except that the gold support obtained in Example 1-10 was used as a catalyst, and methacrolein was 4.0 ml and methanol was 12 ml. did. As a result, the conversion of methacrolein was 54%, the selectivity and yield of methyl methacrylate were 86% and 46%, respectively, and the methyl methacrylate production activity per unit weight of the catalyst was 45. OmolZh / kg-catalyst. there were.
- Example 11 A carboxylic acid ester was produced using the gold carrier obtained in Example 11 as a catalyst.
- the system was pressurized to 0.3 MPa with oxygen, and heated at 70 with stirring, and this temperature was maintained for 3 hours.
- the reaction mixture was analyzed. As a result, the conversion of acrolein was 95%, and the selectivity and yield of methyl acrylate were 84% and 80%, respectively.
- a carboxylic acid ester was produced using the gold carrier obtained in Examples 1 to 10 as a catalyst.
- a 100 ml autoclave with rotary stirring was charged with 2 g of a 40% darioxal aqueous solution, 15 ml of methanol and 0.5 g of the above gold carrier, and sealed.
- the system was pressurized to 0.3 MPa with oxygen, and heated at 80 with stirring, and the temperature was maintained for 1 hour.
- the reaction mixture was analyzed, and as a result, the conversion of dalioxal was 53%, and the selectivity and yield of methyl dalioxylate were 87% and 46%, respectively.
- Example 11 Using the gold support obtained in Example 10 as a catalyst, filling the glass support into a glass tube having an inner diameter of 10 mm, and heating the catalyst layer at a temperature of 280, a helium gas containing about 8% by volume of methoxytrimethylsilane was used. At a flow rate of 6 LZ for 10 minutes. Using 0.5 g of the silylated gold carrier thus obtained as a catalyst, a reaction was carried out in the same manner as in Example 114. As a result of analysis of the obtained reaction solution, the conversion of dario oxal was 75%, and the selectivity and yield of methyl dalioxylate were 82% and 62%, respectively.
- a carboxylic acid ester was produced using the gold carrier obtained in Examples 1 to 10 as a catalyst.
- 2 g of propionaldehyde, 15 ml of ethanol and 0.5 g of the above-mentioned gold carrier were put in an autoclave with 100 m of one-turn stirring and sealed.
- the system was pressurized to 0.3 MPa with oxygen, heated to 8 with stirring, and maintained at this temperature for 2 hours.
- the reaction mixture was analyzed.
- the conversion of propionaldehyde was 83%, and the selectivity and yield of ethyl propionate were 90% and 75%, respectively.
- Example 11 A carboxylic acid ester was produced using the gold carrier obtained in Examples 1 to 10 as a catalyst.
- 2 g of isobutyraldehyde, 15 ml of ethanol and 0.5 g of the above-mentioned gold carrier were placed in a 100 ml autoclave with rotary stirring and sealed.
- the system was pressurized to 0.3 MPa with oxygen, heated to 65 with stirring, and maintained at this temperature for 2 hours.
- the reaction mixture was analyzed.
- the conversion of isobutyraldehyde was 80%, and the selectivity and yield of ethyl isobutyrate were 88% and 70%, respectively.
- Example 11 A carboxylic acid ester was produced using the gold carrier obtained in Example 11 as a catalyst. 2 g of benzaldehyde, 15 ml of 1-propanol and 0.5 g of the above-mentioned gold carrier were put in an autoclave with 100 m of one-turn stirring and sealed. Next, the system was pressurized to 0.3 MPa with oxygen, heated to 70 with stirring, and maintained at this temperature for 4 hours. After the reaction, the reaction mixture was analyzed. As a result, the conversion of benzaldehyde was 89%, and the selectivity and yield of propyl benzoate were 88% and 70%, respectively.
- Example 1-19 A carboxylic acid ester was produced using the gold carrier obtained in Example 11 as a catalyst. 2 g of benzaldehyde, 15 ml of 1-propanol and 0.5 g of the above-mentioned gold carrier were put in an autoclave with 100 m of one-turn stirring and sealed. Next, the system was pressurized to
- the aqueous solution was adjusted to pH 7 using a 0.5 N aqueous sodium hydroxide solution while maintaining 50 Om 1 of an aqueous solution of chloroauric acid having a concentration of 1 Ommo 1 / L at 65 to 7 Ot :.
- 10 g of commercially available titania anatase type, manufactured by Norton
- was added under stirring and stirring was continued for 1 hour while maintaining the pH at 65 to 70 and the pH at 7 to 8.
- the supernatant was removed by standing still, 0.8 L of ion-exchanged water was added to the remaining immobilized gold, and the mixture was stirred at room temperature for 5 minutes, and then the washing step of removing the supernatant was repeated three times.
- the gold-immobilized product obtained by filtration was dried at 10 Ot: for 10 hours, and then calcined in air at 400 for 3 hours to obtain a gold carrier (AuZ titania) having gold supported on a titania carrier.
- a gold carrier AuZ titania
- AuZ titania gold supported on a titania carrier.
- Example 1-19 a gold carrier (AuZ) in which gold was supported on a zirconia carrier was used in the same manner as in Example 1-19 except that commercially available zirconia (manufactured by Norton Co., Ltd.) was used instead of titania as the carrier. Zirconia) was obtained. As a result of measuring the amount of gold carried on this carrier, it was 4.4% by weight with respect to the carrier. In addition, as a result of examining the gold particle diameter of this carrier, it was confirmed that almost all of the gold was highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was 5 nm or less.
- a carboxylic acid ester was produced in the same manner as in Example 1-19 using the above-mentioned gold carrier as a catalyst. After the reaction, the obtained reaction solution was analyzed. As a result, the conversion of methacrolein was 69%, the selectivity and the yield of methyl methacrylate were 83% and 53%, respectively, and the activity of forming methyl methacrylate per unit catalyst weight was 9.6 mol. ⁇ / h / kg—catalyst.
- a gold carrier (Au / Fe 2 ⁇ 3 ) having gold supported on iron was obtained. As a result of measuring the amount of gold carried on this carrier, it was found that 4. It was 8% by weight. In addition, the gold particle diameter of this carrier was examined. As a result, it was confirmed that almost all of the gold was highly dispersed with a particle size of 5 nm or less, and the average particle size was 5 nm or less.
- Example 1-1 In Example 21, zinc nitrate hexahydrate was changed to 29.8 g instead of iron nitrate 9hydrate 40.4 g, and sodium chloroaurate tetrahydrate was changed from 0.888 to 0.51 g.
- a gold carrier (AuZZnO) in which gold was supported on zinc oxide was obtained in the same manner as in Example 1-21, except that 19.6 g was changed to 13.2 g.
- As a result of measuring the amount of gold carried on this carrier it was found to be 2.9% by weight based on the carrier.
- As a result of examining the gold particle size of this support it was confirmed that almost all of the gold was highly dispersed with a particle size of 5 nm or less, and the average particle size was 5 nm or less.
- a carboxylic acid ester was produced in the same manner as in Example 1-21, using the above-mentioned gold support as a catalyst. After the reaction, the obtained reaction solution was analyzed. As a result, the conversion of methacrolein was 74%, the selectivity and yield of methyl methacrylate were 81% and 60%, respectively, and the activity of forming methyl methacrylate per unit weight of the catalyst was 10.9 mo 1 ZhZkg-catalyst.
- the gold-immobilized product obtained by filtration was dried at 100 at 10 hours, and then calcined in air at 400 X: for 3 hours to obtain a gold carrier (Au-Au) with gold supported on alumina. Alumina) was obtained.
- the amount of gold carried on the carrier was measured by X-ray fluorescence analysis and found to be 4.6% by weight based on the carrier.
- Example 2-2 In (2-1) of Example 2-1 except that the amount of lead acetate trihydrate was changed from 0.74 to 0.46 g, the metal particles containing gold and lead were converted to alumina. A carrier supported on a carrier was obtained. The contents of gold and lead in this carrier were 4.6% by weight and 2.5% by weight, respectively.
- Example 2_1 In (1) 1 of Example 2_1, the same operation was performed except that the amount of lead acetate trihydrate was changed from 0.748 to 1.39 g. Was obtained. The contents of gold and lead in this carrier were 4.6% by weight and 7.5% by weight, respectively.
- Example 2-1 the lead carrier (Pb) was replaced by 10 g of alumina (trade name “AC-12R” manufactured by Sumitomo Chemical Co., Ltd.) instead of 10 g of gold carrier (AuZ alumina). (A-alumina) was prepared. Using this lead carrier, a carboxylic acid ester was produced in the same manner as in (2) of Example 2-1. As a result of analyzing the content after the reaction, the conversion of methacrolein was 5%, methyl methacrylate was not formed, and the selectivity and the yield were both 0%. It can be seen that no carboxylate is formed on the lead carrier.
- the gold immobilized product obtained by filtration was dried at 100 for 10 hours and calcined at 400 in air for 3 hours. This was filled in a glass tube, and a mixed gas consisting of 10% of hydrogen and 90% of nitrogen was passed at 400 for 6 hours to perform a hydrogen reduction treatment.
- a carrier Au-PbZ silica
- the amount of gold and lead carried on this carrier was measured and found to be 4.5% by weight and 4.9% by weight, respectively, based on the carrier.
- the aqueous solution was adjusted to pH 7 using 0.5mo 1ZL potassium hydroxide aqueous solution, while maintaining 25 Om 1 of aqueous solution of tetraclocaptic acid having a concentration of 1 Ommo 1 ZL at 65 to 70.
- 10 g of the above-mentioned A1-silica carrier was added with stirring, and stirring was continued for 1 hour while maintaining the temperature at 65 to 70.
- the washing step of removing the supernatant liquid by allowing to stand still, adding 0.8 L of ion-exchanged water to the remaining solid substance, stirring the mixture at room temperature for 5 minutes, and removing the supernatant liquid was repeated three times. .
- the gold immobilized product obtained by filtration was dried at 10 Ot: for 10 hours, and further calcined at 400 in air for 3 hours. Thereafter, 25 ml of a methanol solution containing 0.93 g of lead acetate trihydrate was added, and methanol was removed by an evaporator under normal pressure to obtain a support carrying the Pb compound. After the support was filled in a glass tube, nitrogen gas containing 10 to 20% of methanol vapor was passed at 400 L for 4 hours at a flow rate of about 7.5 LZ. In this way, a carrier (Pb—AuZA1 nosilica) in which metal particles containing gold and lead were carried on an A1-silica carrier was obtained. As a result of measuring the amounts of gold and gold carried on the carrier, they were 4.5% by weight and 5.0% by weight, respectively, based on the carrier. The A1 content in the carrier (A1 / silica) was 5.0% by weight.
- Methacrolein 3m1 methanol in autoclave with 100ml rotary stirring 12 ml and 0.5 g of the above-mentioned carrier were put and sealed.
- the system was pressurized to 0.3 MPa with oxygen, and the system was heated to 80 with stirring and maintained at this temperature for 1 hour.
- the mixture was cooled, opened, the catalyst and the reaction solution were separated by filtration, and the reaction solution was analyzed.
- the conversion of methacrolein was 81%
- the selectivity and the yield of methyl methacrylate were 86% and 70%, respectively.
- Methyl methacrylate production activity per unit catalyst weight was 50.7 mol / hZkg—catalyst.
- the carboxylic acid ester was prepared in the same manner as in Example 2-5, except that the support obtained in Example 2-5 was used as a catalyst, the raw materials were 3 ml of acrolein and 13 ml of methanol, and the reaction conditions were 7 and 4 hours. Was manufactured. Analysis of the resulting reaction solution showed that the conversion of acrolein was 98%, the selectivity and yield of methyl acrylate were 87% and 85%, respectively, and the activity of methyl acrylate formation per unit catalyst weight was 19. lmo lZh / kg—catalyst.
- a carboxylic acid ester was produced in the same manner as in Example 2-5, except that the raw material obtained in Example 2-5 was used as a catalyst, and the raw materials were 2 g of a 40% aqueous glyoxal solution and 15 ml of methanol. .
- the conversion of dario oxal was 74%
- the selectivity and the yield of methyl dalioxylate were 88% and 65%, respectively
- the activity of forming methyl dalioxylate per unit catalyst weight was 17.9 mol. 1 kg—a catalyst.
- the mixture was hydrogen reduced at 450 for 4 hours while flowing a mixed gas of 20% hydrogen and 80% nitrogen at a flow rate of 6 LZ.
- a carrier Au—Bi titania
- the amount of gold and lead carried on the carrier was measured, and as a result, was 4.5% by weight and 1.6% by weight, respectively, based on the carrier.
- the particle diameter of the metal particles of this support it was confirmed that most of the particles were highly dispersed with a particle diameter of 3 to 6 nm, and the average particle diameter was 6 nm or less.
- both gold and bismuth components were detected in each of the observed metal particles.
- the aqueous solution was adjusted to pH 7 using 0.5 mo 1 ZL potassium hydroxide aqueous solution while maintaining 20 Om 1 of aqueous solution of tetraclocaptic acid having a concentration of 1 Ommo 1 ZL at 65 to 7 O :. 10 g of the above-mentioned Zn-silica carrier was added to this aqueous solution with stirring, and stirring was continued for 1 hour while maintaining the temperature at 65 to 70. Then, the supernatant was removed by standing still, 0.8 L of ion-exchanged water was added to the remaining immobilized gold, and the mixture was stirred at room temperature for 5 minutes. The washing process of removing the supernatant was repeated three times. Was.
- the immobilized gold obtained by filtration is dried at 100 for 10 hours, and further in air at 45 for 3 hours. Firing for a while. After filling this in a glass tube, hydrogen reduction treatment was carried out at 500 for 4 hours using a mixed gas consisting of 10% hydrogen and 90% argon in order to promote the compounding of gold and zinc.
- a carrier Au / ZnZ silica
- metal particles containing gold and zinc were carried on a silica carrier was obtained.
- Example 2-1 Using the carrier (Pb—AuZr—alumina) obtained in Example 2-1 as a catalyst, the production reaction of the carboxylate was repeated.
- the filtered catalyst was charged into an autoclave with 100 ml of rotary stirring together with 3.Om 1 of methacrolein and 13 ml of methanol and sealed again, and a second reaction was carried out in the same manner as above.
- the reaction solution was analyzed in the same manner as described above. As a result, the conversion of methacrolein was 79%, the selectivity and yield of methyl methacrylate were 86% and 68%, respectively, and the activity of forming methyl methacrylate per unit weight of the catalyst was 24.6 molZhZkg—catalyst. .
- the same operation was performed, and the third and fourth reactions were performed.
- Each reaction solution was analyzed in the same manner as described above.
- the result of the third reaction was that the conversion of methacrolein was 81%, the selectivity and yield of methyl methacrylate were 85% and 69%, respectively, and the activity of forming methyl methacrylate per unit catalyst weight was 25.Omo ⁇ / hZkg—catalyst.
- the result of the fourth reaction was that the conversion of methacrolein was 80%, the selectivity and yield of methyl methacrylate were 86% and 69%, respectively, and the activity of forming methyl methacrylate per unit catalyst weight was 25.Omo 1 / h / kg was one catalyst.
- Aldrich reagent (a 75% by weight solution of titanium diisopropoxide bisacetyl acetate in propanol) methanol was added to 30.4 g to make a total amount of 20 Om1.
- 50 g of a commercially available silica carrier (manufactured by Fuji Silica Chemical Co., specific surface area: 179 mVg, 100 to 500 mesh) was added, and the solvent was distilled off as much as possible at normal pressure 80 using an evaporator. Thereafter, the solid content was dried at 120 for 10 hours, and then calcined in air at 600 "C for 4 hours.
- the thus obtained Ti-silica carrier was analyzed by fluorescent X-ray. As a result, silica was obtained.
- Au and Sb were contained in the same manner as in Example 2-11 except that 0.121 g of antimony (III) n-butoxide (Glest reagent) was used instead of germanium (III) n-butoxide.
- a support (Sb—AuZT i—silica) in which fine particles were supported on a T i—silica carrier was obtained.
- the amount of Au and Sb carried on this carrier was investigated, and as a result, was 4.2% by weight and 2.2% by weight, respectively.
- the average particle diameter was 6 nm or less, and both Au and Sb were detected in each metal particle.
- Example 2-1 1 5.11 g of darioxal obtained in 1: 1 octanol solution, 9.62 g of 1-octanol and 0.6 g of the above-mentioned carrier were charged into a autoclave. An oxidation reaction was carried out in the same manner as described above. As a result of analyzing the obtained reaction solution, it was found that the conversion of dalioxalol was 90%, the selectivity of the total product of mono-butyl dalioxylate and mono-butyl dalioxylate was 74%, and the yield was 67%. there were.
- Example 2-13 5.11 g of darioxal obtained in 1: 1 octanol solution, 9.62 g of 1-octanol and 0.6 g of the above-mentioned carrier were charged into a autoclave. An oxidation reaction was carried out in the same manner as described above. As a result of analyzing the obtained reaction solution, it was found that the conversion of dali
- the pH was adjusted to 6.2 with 0.5 N aqueous sodium hydroxide while maintaining 250 ml of aqueous solution of chloroauric acid having a concentration of 1 Ommo 1 ZL at 65 to 70.
- aqueous solution 2 g of the Ti-silica carrier obtained in Example 1-23 was added, and after the pH of the solution reached 6, nickel (II) acetate tetrahydrate (manufactured by Wako Pure Chemical Industries) was added. 5 Oml of a water solution containing 2 lg was added. Thereafter, stirring was continued for 1 hour while maintaining at 70 °: ⁇ ⁇ 6.2.
- the oxidation reaction was carried out in the same manner as in Example 2-1-1, except that the above-mentioned carrier was used as a catalyst. As a result of analyzing the obtained reactants, it was found that the conversion of darioxiza was 94. %, The selectivity of the product, mono-butyl dalioxylate, was 75%, and the yield was 71%.
- Example 2-15 Except that 0.22 g of cobalt acetate tetrahydrate (manufactured by Wako Pure Chemical Industries) was used instead of nickel acetate, the metal particles containing Au and Co were changed to Ti-silica in the same manner as in Example 2-15. A carrier supported on a carrier was obtained. As a result of examining the supported amounts of Au and Co in this carrier, they were 4.1% by weight and 2.6% by weight, respectively. In addition, as a result of examining the metal particle diameter of the support, the average particle diameter was 6 nm or less, and both Au and Co components were detected in each metal particle.
- a support (Au-Fe / Al-silica) in which metal particles containing Au and Fe were supported on an A1-silica carrier was obtained.
- Au and Fe supported on the carrier they were 4.0% by weight and 4.1% by weight, respectively.
- particle size of the metal particles of this support almost all particles were smaller than 6 nm in size. The particles were dispersed, and the average particle size was confirmed to be 6 nm or less.
- both Au and Fe components were detected in each of the observed metal particles.
- a carboxylate was produced using the support (Au-FeZA1-silica) obtained in (1) as a catalyst.
- 3 ml of methacrolein, 15 ml of methanol and 1 g of the above-mentioned carrier were placed in an autoclave with stirring at 10 Om for one rotation, and sealed.
- the system was pressurized to 0.5 MPa of oxygen and 0.3 MPa of nitrogen, heated to 80 with stirring, and maintained at this temperature for 2 hours.
- the obtained reaction solution was analyzed.
- the conversion of methacrolein was 72%, and the selectivity and yield of methyl methacrylate were 85% and 61%, respectively.
- the pH was adjusted to pH 7 with a 0.5 N aqueous sodium hydroxide solution while maintaining 0.5 liter of an aqueous solution of tetrachloroporous acid having a concentration of 2 Ommo 1 ZL at 65 to 70.
- aqueous solution 40 g of commercial alumina (product name "Neo Bead” manufactured by Mizusawa Chemical) was added under stirring, and stirring was continued for 1 hour while maintaining the temperature at 65 to 7 Ot :. Thereafter, the supernatant was removed by standing still, 0.8 l of ion-exchanged water was added to the remaining gold-immobilized product, and the mixture was stirred at room temperature for 5 minutes. The washing process of removing the supernatant was repeated three times.
- the gold-immobilized product obtained by filtration was dried at 10 for 10 hours, and then calcined in air at 40 for 3 hours to obtain a gold carrier (Au / a-alumina) having gold supported on an alumina carrier. Obtained.
- a carbonate ester was produced in the same manner as in Example 1 (2), except that 3 g of methallyl alcohol was replaced by 3 g of methyl ⁇ -hydroxymethyl acrylate in Example 3-1. .
- the conversion of methyl ⁇ -hydroxymethyl acrylate was 26%, and the selectivity and yield of the product dimethyl methylene malonate were 88% and 23%, respectively.
- a carboxylic acid ester was produced in the same manner as in Example 3-1 (2), except that 3 g of ethylene glycol was used instead of 3 g of methallyl alcohol in Example 3-1. As a result, the conversion of ethylene glycol was 43%, and the selectivity and yield based on the charged ethylene glycol of the product methyl glycolate were 84% and 36%, respectively.
- Example 3-1 except that 3 g of 1,3-propanediol was used instead of 3 g of methallyl alcohol, the carboxylic acid ester was prepared in the same manner as in Example 3-1 (2). The manufacture of Tell was carried out. As a result, the conversion of 1,3-propanediol was 36%, and the selectivity and yield of the product dimethyl malonate were 85% and 31%, respectively.
- aqueous solution 25 ml containing 3.12 g of lanthanum nitrate hexahydrate was impregnated with 10 g of a commercially available silica carrier (product name "Caractact Q-10" manufactured by Fuji Silicia) in a warm bath. After that, it was dried at 120 for 120 minutes and fired in air at 600 for 4 hours. As a result, a La-silica carrier having lanthanum supported on the silica carrier was obtained.
- the pH was adjusted to pH 7 using a 0.5N aqueous sodium hydroxide solution while keeping 250 ml of an aqueous solution of tetrachloroporous acid having a concentration of 10 Ommo 1 / L at 65 to 70 t :. 5 g of the above-mentioned carrier was added to this aqueous solution with stirring, and stirring was continued for 1 hour while maintaining the temperature at 65 to 7O. Thereafter, the supernatant is removed by standing still, 0.8 l of ion-exchanged water is added to the remaining immobilized gold, and the mixture is stirred at room temperature for 5 minutes. The washing step of removing the supernatant is repeated three times. Repeated. The gold-immobilized product obtained by filtration was dried at 100 for 10 hours and then calcined at 400 in air for 3 hours to obtain a carrier (AuZLa-silica) with gold supported on a La-silica carrier. I got
- the amounts of gold and lanthanum carried on the carrier were measured, and as a result, were 8.4% by weight and 10.1% by weight, respectively, based on the carrier.
- the particle diameter of the metal particles of this support it was confirmed that almost all particles were highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was clearly 5 nm or less.
- the aqueous solution was adjusted to PH7 using a 0.5mo 1ZL aqueous potassium hydroxide solution while maintaining 25Om1 of an aqueous solution of tetraclocaptic acid having a concentration of 1Ommo1ZL at 65 to 70.
- 10 g of the above-mentioned A1-silica carrier was added to this aqueous solution with stirring, and stirring was continued for 1 hour while maintaining the temperature at 65 to 70.
- the washing step of removing the supernatant liquid by allowing to stand still, adding 0.8 L of ion-exchanged water to the remaining solid substance, stirring the mixture at room temperature for 5 minutes, and removing the supernatant liquid was repeated three times. .
- the immobilized gold obtained by filtration was dried at 100 for 10 hours and calcined at 400 in air for 3 hours. Thereafter, 25 ml of a methanol solution containing 0.93 g of lead acetate trihydrate was added, and the methanol was removed by an evaporator under normal pressure. The nitrogen gas containing 10 to 20% of methanol vapor was flowed at about 7.5 LZ. Circulated at 400 for 4 hours. In this way, a carrier (Pb—AuZAl / silica) in which metal particles containing gold and lead were carried on an A1-silica carrier was obtained. As a result of measuring the amounts of gold and lead carried on the carrier, they were 4.5% by weight and 5.0% by weight, respectively, based on the carrier.
- the A 1 content in the carrier (A 1 / silica) was 5.0% by weight.
- a 1 content in the carrier (A 1 / silica) was 5.0% by weight.
- the particle diameter of the metal particles of this support it was confirmed that almost all particles were highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was 5 nm or less.
- both gold and lead components were detected in each metal particle observed.
- a hydrogen reduction treatment was performed at 450 for 4 hours while flowing a mixed gas of 20% hydrogen and 80% nitrogen at a flow rate of 6 o'clock.
- a carrier Au—Bi titania
- the amount of gold and bismuth carried on the carrier was measured, and as a result, was 4.5% by weight and 1.6% by weight, respectively, based on the carrier.
- the particle diameter of the metal particles of this carrier it was confirmed that almost all particles were highly dispersed with a particle diameter of 3 to 6 nm, and the average particle diameter was 6 nm or less.
- both gold and bismuth components were detected in each of the observed metal particles.
- the above aqueous solution was adjusted to PH7 using 0.5 mo 1ZL potassium hydroxide aqueous solution while maintaining 200 ml of an aqueous solution of tetrachloroporous acid having a concentration of 10 mm 01 ZL at 65 to 70.
- 10 g of the above-mentioned Zn-silica carrier was added to this aqueous solution with stirring, and stirring was continued for 1 hour while maintaining the temperature at 65 to 70.
- the supernatant was removed by standing still, 0.8 L of ion-exchanged water was added to the remaining gold-immobilized product, and the mixture was stirred at room temperature for 5 minutes. Repeated times.
- the gold-immobilized product obtained by filtration was dried at 100 at 10 hours, and calcined at 450 in air for 3 hours. After filling this in a glass tube, hydrogen reduction treatment was performed at 500 V for 4 hours using a mixed gas consisting of 10% hydrogen and 90% argon in order to promote the compounding of gold and zinc.
- a carrier AlZZnZ silica
- metal particles containing gold and zinc were carried on a silica carrier
- the pH was adjusted to 7 using a 0.5 N aqueous sodium hydroxide solution while maintaining 500 ml of an aqueous solution of tetrachloroaurate having a concentration of 5 mm0 1 ZL at 65 to 70.
- aqueous solution was added 10 g of a commercially available titania carrier (Nanaton, Anayuichi Titania) under stirring, and stirring was continued for 1 hour while maintaining at 65 to 70 O: and pH of 7 to 8. Thereafter, the supernatant was removed by standing still, 0.8 l of ion-exchanged water was added to the remaining gold-immobilized substance, and the mixture was stirred at room temperature for 5 minutes. The washing step of removing the supernatant was repeated three times.
- the gold-immobilized product obtained by filtration was dried at 100 for 10 hours, and calcined in air at 40 O for 3 hours to obtain a gold carrier (AuZ titania) having gold supported on a titania carrier. Obtained. As a result of measuring the amount of gold carried on this carrier, it was 4.7% by weight with respect to the carrier. In addition, as a result of examining the state of the metal particles, it was confirmed that almost all of the metal particles were highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was clearly 5 nm or less.
- Example 3-9 an AuZ zirconia catalyst was produced in the same manner as in Example 9 (1) except that zirconia (manufactured by Norton) was used instead of titania as the carrier.
- the amount of gold carried was measured in the same manner as in Example 9, and as a result, it was 4.4% by weight with respect to the carrier.
- the particle size of the metal particles of this catalyst it was confirmed that almost all particles were highly dispersed with a particle size of 5 nm or less, and the average particle size was clearly 5 nm or less.
- the obtained solid was dried at 120 for 12 hours, and calcined in air at 450 for 4 hours to obtain a gold carrier (AuZFe 2 O 3 ) having gold supported on an iron oxide carrier.
- AuZFe 2 O 3 gold supported on an iron oxide carrier.
- As a result of measuring the amount of gold carried on this carrier it was 4.8% by weight based on the carrier.
- particle size of the gold particles it was confirmed that almost all of the gold was highly dispersed with a particle size of 5 nm or less, and the average particle size was clearly 5 nm or less.
- Example 3-11 29.8 g of zinc nitrate hexahydrate was used in place of 40.4 g of iron nitrate nonahydrate, and the amounts of tetrachloroporous acid tetrahydrate and sodium carbonate were set to 0.
- a carrier Au / ZnO
- the amount of gold carried was measured in the same manner as in Example 3-9, and as a result, it was 2.9% by weight with respect to the carrier. Further, the particle size of the gold particles of this carrier was examined. As a result, it was confirmed that almost all particles were highly dispersed with a particle diameter of 5 nm or less, and the average particle diameter was clearly 5 nm or less.
- the pH was adjusted to pH 7 with a 0.5N aqueous sodium hydroxide solution while maintaining 0.5 liter of a tetrachrom mouth solution having a concentration of 2 Ommo 1 / L at 65 to 70.
- a tetrachrom mouth solution having a concentration of 2 Ommo 1 / L at 65 to 70.
- 20 g of the Ti-silica carrier obtained in Example 1-23 was added under stirring, and stirring was continued for 1 hour while maintaining the temperature at 65 to 7O. Thereafter, the supernatant was removed by standing still, 0.8 l of ion-exchanged water was added to the remaining immobilized gold, and the mixture was stirred at room temperature for 5 minutes. Repeated times.
- the immobilized gold material was dried at 100 for 10 hours and calcined in air at 400 for 3 hours to obtain a gold support (AuZT i -S i O2) with gold supported on a Ti-silica carrier. Obtained. In this gold carrier, 3.6% by weight of Au was supported on the Ti-silica carrier.
- 2-hydroxyethyl glycolate was formed at a selectivity of 18% and dimethyl oxalate at a selectivity of less than 1%, and methyl formate was formed at a molar ratio of 0.12 to methyl glycolate. It was generated at the ratio of
- the oxidation reaction was carried out in the same manner as in Example 3-13, except that 3 g of 1,2-propylene glycol was used instead of ethylene glycol.
- the conversion of 1,2-propylene glycol was 88%, and the selectivity and yield based on the charged 1,2-propylenedaricol based on the methyl viruvate product were 66% and 58%, respectively.
- % The selectivity and the yield of methyl lactate were 12% and 11%, respectively.
- Acetol was produced as a by-product with a selectivity of 20%.
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EP02733287A EP1393800A4 (en) | 2001-06-04 | 2002-06-04 | CATALYST FOR THE PREPARATION OF CARBOXYLIC ACID ESTERS AND METHOD FOR THE PREPARATION OF CARBOXYLIC ACID ESTERS |
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JP2001294233A JP3944875B2 (ja) | 2001-09-26 | 2001-09-26 | カルボン酸エステル合成用触媒及びカルボン酸エステルの製造方法 |
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Also Published As
Publication number | Publication date |
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CN1516619A (zh) | 2004-07-28 |
US7326806B2 (en) | 2008-02-05 |
EP1393800A4 (en) | 2007-08-22 |
US20030060655A1 (en) | 2003-03-27 |
EP1393800A1 (en) | 2004-03-03 |
CN1273215C (zh) | 2006-09-06 |
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