CN107032993A - A kind of gas-phase photocatalysis methanol and ethanol disposably synthesize the preparation and application of the Au catalyst of a variety of esters - Google Patents
A kind of gas-phase photocatalysis methanol and ethanol disposably synthesize the preparation and application of the Au catalyst of a variety of esters Download PDFInfo
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- CN107032993A CN107032993A CN201710322783.9A CN201710322783A CN107032993A CN 107032993 A CN107032993 A CN 107032993A CN 201710322783 A CN201710322783 A CN 201710322783A CN 107032993 A CN107032993 A CN 107032993A
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 86
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000003054 catalyst Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 9
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 9
- 150000002148 esters Chemical class 0.000 title abstract description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 39
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 claims abstract description 18
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims abstract description 15
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 12
- 230000003647 oxidation Effects 0.000 claims abstract description 10
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 10
- WBJINCZRORDGAQ-UHFFFAOYSA-N formic acid ethyl ester Natural products CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims abstract description 6
- 239000012279 sodium borohydride Substances 0.000 claims abstract description 5
- 229910000033 sodium borohydride Inorganic materials 0.000 claims abstract description 5
- 239000001301 oxygen Substances 0.000 claims abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 24
- 239000012071 phase Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000006555 catalytic reaction Methods 0.000 claims description 5
- 239000008246 gaseous mixture Substances 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 239000007791 liquid phase Substances 0.000 claims description 2
- 150000004702 methyl esters Chemical class 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- 238000002604 ultrasonography Methods 0.000 claims 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 abstract description 8
- 239000010931 gold Substances 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 3
- JAJIPIAHCFBEPI-UHFFFAOYSA-N 9,10-dioxoanthracene-1-sulfonic acid Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1C=CC=C2S(=O)(=O)O JAJIPIAHCFBEPI-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 abstract description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052737 gold Inorganic materials 0.000 abstract description 2
- 239000011943 nanocatalyst Substances 0.000 abstract 2
- ZWYDDDAMNQQZHD-UHFFFAOYSA-L titanium(ii) chloride Chemical compound [Cl-].[Cl-].[Ti+2] ZWYDDDAMNQQZHD-UHFFFAOYSA-L 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 230000032050 esterification Effects 0.000 description 8
- 238000005886 esterification reaction Methods 0.000 description 8
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 6
- 238000006356 dehydrogenation reaction Methods 0.000 description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 230000006315 carbonylation Effects 0.000 description 4
- 238000005810 carbonylation reaction Methods 0.000 description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 235000019253 formic acid Nutrition 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- FDWREHZXQUYJFJ-UHFFFAOYSA-M gold monochloride Chemical compound [Cl-].[Au+] FDWREHZXQUYJFJ-UHFFFAOYSA-M 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- CHUYYOSIZBKMJD-UHFFFAOYSA-N acetic acid;gold Chemical compound [Au].CC(O)=O CHUYYOSIZBKMJD-UHFFFAOYSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 150000002168 ethanoic acid esters Chemical class 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 125000004494 ethyl ester group Chemical group 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- -1 fatty acid ester Chemical class 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000002316 fumigant Substances 0.000 description 1
- 239000003254 gasoline additive Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000005839 oxidative dehydrogenation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000011973 solid acid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- 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
- B01J35/39—Photocatalytic 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
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/613—10-100 m2/g
-
- 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
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
A kind of gas-phase photocatalysis methanol and ethanol disposably synthesize the preparation of the Au catalyst of a variety of esters and using photocatalysis partial oxidation methanol and ethanol prepare the experimental method and reaction condition of the compounds such as methyl formate, ethyl acetate, Ethyl formate, methyl acetate the invention provides a kind of preparation method of nano catalyst of titanium dichloride load and its under gas phase condition.Mixed phase titanium dioxide using Detitanium-ore-type or anatase and a small amount of rutile is carrier, using soluble gold salt as the presoma of gold, sodium borohydride is reducing agent, prepare the nano catalyst of titanium dichloride load, the catalyst, can be in oxygen-containing atmosphere by a variety of esters products such as methanol and ethanol mixed gas partial oxidation formic acid methyl esters, ethyl acetate, Ethyl formate, methyl acetate under ultraviolet light.Prepared catalyst has stability good, and methanol and ethanol conversion are high, the characteristics of total esters are selectively high.
Description
Technical field
The present invention relates to a kind of preparation of photochemical catalyst and its at low temperature gas-phase photocatalysis partial oxidation ethanol and methanol
The application of a variety of esters products is prepared, there is provided the preparation method of catalyst and catalysis are anti-for category derived energy chemical and field of fine chemical
Answer condition.
Background technology
Methyl formate is described as " omnipotent chemical intermediate ", available for production formic acid, formamide and other tens kinds
Chemical products, can also be directly used as insecticide, bactericide, fumigant, agent for tobacco treatment and gasoline additive [G. Jenner.
Appl. Catal. A. 1995, 121, 25-44].Traditional methyl formate production method mainly has methanol esterification method, methanol
Carbonylation method, methanol dehydrogenation method and one-step method from syngas, wherein methanol dehydrogenation method include methanol direct dehydrogenation and oxidative dehydrogenation two
The method of kind.Esterification process technique falls behind, production cost is high, equipment corrosion is serious, and production technology is eliminated substantially；Carbonylation method reaction pressure
Power is high（4.0MPa）, complex process, catalyst sodium methoxide facile hydrolysis blocking pipeline and production cost it is high；One-step method from syngas is reacted
Pressure is high（The U.S. is more than 0.69MPa, domestic 4.0-5.0MPa）.
Compared with other conventional methods, traditional methanol dehydrogenation method has that raw material is single, reaction condition gentle, selecting response
Property and activity is high, the low advantage of equipment investment, thus receive significant attention.But conventional catalyst optimal reaction temperature is higher
（About 280 DEG C）, it is impossible to meet the requirement of low energy consumption.
H. Kominami etc. [H. Kominami, et al. Chem. Comm. 2010,11,426-429.] is reported
It is anti-that road realizes under ultraviolet light conditions gas phase oxidation dehydrogenation from methanol to methyl formate using anatase titanium dioxide
Should, at room temperature（25℃）Methyl formate conversion ratio nearly 10%, selectivity is more than 91%.The report such as Yang Xuzhuan is catalyzed using the silver of load
Agent realizes methanol to conversion [Xuzhuang Yang, the et al. Catalysis of methyl formate under liquid-phase condition
Communications. 2014, 43, 192-196]。
The production of methyl acetate mainly has using ethanol and formic acid as the direct esterification of raw material, using methanol as the methanol of raw material
Carbonylation method and methanol dehydrogenation method and Dimethyl ether carbonylation method etc..Direct esterification will be catalyzed using sulfuric acid or solid acid
Agent, other several method reaction temperatures are general more than 200 DEG C, and several MPas to tens MPas of pressure does not wait [Wu Wen Ping etc., acetic acid
Methyl esters study on the synthesis new development, gas chemical industry, 2004,29. C. Zuo, et. al, Industrial ＆
Engineering Chemistry Research,2014,53, 10540-10548. H. Xue, et al,Industrial
＆ Engineering Chemistry Research, 2013,52,11510-11515.], accessory substance is more.Ethyl formate
Catalyst for making direct esterification production is typically made of sulfuric acid using formic acid and ethanol as raw material, it is seriously polluted.Methyl acetate and Ethyl formate
Research report it is less.
Ethyl acetate is one of widely used fatty acid ester, maximum with excellent dissolubility, quick-drying
Function as organic solvent.Ethyl acetate is also widely used for China Synthetic Rubber Industry, vinyl resin fiber element, acetic acid esters
The production of the products such as cellulose, butyl acetate, ethyl cellulose, cellulose nitrate.[Liu Chong etc. compiles petrochemical industries handbook (three) north
Capital:Chemical Industry Press, 1987: P259.].[Cheng Nenglin, Hu Shengwen solvents handbook (volume two) [M] Beijing:Chemical industry
Publishing house, 1987:14-15].
Synthetic Methods of Ethyl Acetate generally has direct esterification, acetaldehyde condensation method, alcohol catalysis dehydriding, acetic acid
/ ethylene synthase esterification process etc..Wherein direct esterification has the following disadvantages：Reaction temperature is high, acetic acid utilization rate is low, Yi Fa
Raw side reaction；Cause equipment corrosion serious, waste liquor contamination ring due to the severe corrosive of the catalyst concentrated sulfuric acid in production process simultaneously
Border, accessory substance processing is difficult, causes production cost high.Acetaldehyde condensation method is limited by raw material acetaldehyde, and prepared by catalyst hardly possible, the Yishui River
Solution, course of reaction need cooling.
The content of the invention
The purpose of the present invention is mainly to provide a kind of reaction temperature at 15-50 DEG C, can be by under gas phase and illumination condition
The high-efficiency titanium dioxide of the product such as methanol and ethanol gaseous mixture partial oxidation formic acid methyl esters, ethyl acetate, Ethyl formate, methyl acetate
Change the nanogold Au-TiO of titanium load2Photochemical catalyst preparation method and application.
The present invention is first by Au-TiO2Photochemical catalyst is used for gas-phase photocatalysis partial oxidation methanol and ethanol gaseous mixture first
The reaction of the products such as sour methyl esters, ethyl acetate, Ethyl formate, methyl acetate.Test result indicates that, catalyst has higher first
Alcohol and ethanol conversion and total esters selectivity.In the range of experimental temperature and under illumination condition, methanol conversion reaches 60-
More than 80%, ethanol conversion reaches more than 60-70%, and total esters selectively reach more than 75-95%, accessory substance have a small amount of ethene,
Acetaldehyde and acetone.
The catalyst Au-TiO of the present invention2By 1-5 gold and 95-99%（Mol ratio）Titanium dioxide constitute, titanium dioxide
Crystal formation is Detitanium-ore-type or anatase and a small amount of（Less than 25%）Rutile mixed phase is constituted.
The preparation method is that being prepared using chemical reduction method.
Preparation method is as follows.
（1）A certain amount of gold chloride is taken to be configured to 0.001 mol/l aqueous solution of chloraurate with distilled water.
（2）With Au:NaBH4=1:4（Mol ratio）Appropriate sodium borohydride is weighed, in the distilled water for being dissolved in advance ice bath cooling.
（3）A certain amount of titanium dioxide ultrasonic disperse is weighed in step（2）In the sodium borohydride aqueous solution of preparation, ice is kept
Bath cooling continues to stir.
（4）By step（1）The aqueous solution of chloraurate of preparation is added dropwise to step（3）In obtained mixed solution, simultaneously
It is stirred vigorously until reaction is completed.Stop stirring and standing 24 h.
（5）Centrifuge, washing, dried at 60 DEG C, catalyst is obtained after 400 DEG C of 1 h of calcining.
Specific surface area of catalyst and the specific surface area of titanium dioxide precursor prepared by the present invention is approached, typically in 50-300
m2/g。
Titanium dioxide as described above can be commercial mixed phase titanium dioxide P25, commercial anatase titanium dioxide ST-
01st, the mixed phase titanium dioxide of self-control Detitanium-ore-type or anatase and rutile.
Solubility gold salt as described above can be gold chloride, acetic acid gold, chlorauride.
The catalyst of the present invention is applied to gas-phase photocatalysis partial oxidation methanol and ethanol gaseous mixture methyl formate, acetic acid
The reaction methods such as ethyl ester, Ethyl formate, methyl acetate are as follows：
Catalyst fines is sprayed on a solid surface, and the solid can be glass, stainless steel, plastics, ceramics, and light source is ultraviolet light
Or sunshine, reaction temperature is 15-50 DEG C, and methanol/ethanol/oxygen ratio is CH3OH:CH3CH2OH:O2=1:1:2-2:1:3, first
Alcohol and alcohol volume content are 1-3%, and nitrogen is Balance Air, and reaction velocity is 100-400 l ﹒ g-1﹒ h-1。
Compared with the prior art the present invention has following innovation and feature.
First by Au-TiO2Catalyst is used for disposable gas-phase photocatalysis partial oxidation methanol and a variety of esters of ethanol system
The reaction of compound.
Catalytic reaction temperature is 15-50 DEG C, is reaction in current methanol and ethanol gaseous oxidation ester type compound technique
Temperature minimum operation condition.
Claims (1)
1. a kind of gas-phase photocatalysis partial oxidation methanol and ethanol gaseous mixture prepare methyl formate, ethyl acetate, Ethyl formate, second
The method of the multi-products such as sour methyl esters, it is characterised in that composition, preparation method and the reaction condition of catalyst；Catalyst is by two
Titania oxide supported nanogold is constituted, and titanium dioxide and nanogold particle are active component；Titanium dioxide is sharp in catalyst
The mixed phase structure of titanium ore type or anatase and a small amount of rutile, golden molar fraction is 1-5%；Catalyst uses liquid-phase reduction side
Prepared by method, titanium dioxide is added in the appropriate sodium borohydride aqueous solution cooled down through ice bath, and ultrasound is stirred continuously down after mixing,
Appropriate 0.001 mol/l aqueous solution of chloraurate is added dropwise, stops stirring after being added dropwise to complete and stands 24 h, centrifuge, use
Distilled water, ethanol are washed, and are dried at 60 DEG C, are obtained Au-TiO2Photochemical catalyst；Catalytic reaction is in 15-50 DEG C and ultraviolet light
Lower to carry out, methanol and alcohol volume content are 1-3% in unstripped gas, and methanol/ethanol/oxygen ratio is CH3OH: O2=2:1:1-1:1:
3, Balance Air is nitrogen, air speed 100-400 l ﹒ g-1﹒ h-1。
Priority Applications (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946639A (en) * | 2017-03-30 | 2017-07-14 | 内蒙古大学 | A kind of Au catalyst preparation and its for gas-phase photocatalysis ethanol synthesizing ethylene, acetaldehyde, acetone method |
| CN108579794A (en) * | 2018-04-02 | 2018-09-28 | 新疆大学 | The molecular sieve catalyst of gold-supported is used to convert the method that methanol is methyl acetate |
| CN110681380A (en) * | 2019-10-22 | 2020-01-14 | 吉林师范大学 | Preparation of high-efficiency hydrogen production catalyst Au-HSTiO by liquid phase reduction2Method (2) |
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| CN103894192A (en) * | 2014-04-18 | 2014-07-02 | 内蒙古大学 | Preparation and application of supported gold-silver alloy catalyst for synthesizing methyl formate by selectively oxidizing methanol under gas-phase photocatalytic conditions |
| CN103922929A (en) * | 2014-04-18 | 2014-07-16 | 内蒙古大学 | Preparation and application of load-type nanometer Au catalyst capable of synthesizing methyl formate by gas phase photocatalytic selectivity oxidation of methyl alcohol |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103894192A (en) * | 2014-04-18 | 2014-07-02 | 内蒙古大学 | Preparation and application of supported gold-silver alloy catalyst for synthesizing methyl formate by selectively oxidizing methanol under gas-phase photocatalytic conditions |
| CN103922929A (en) * | 2014-04-18 | 2014-07-16 | 内蒙古大学 | Preparation and application of load-type nanometer Au catalyst capable of synthesizing methyl formate by gas phase photocatalytic selectivity oxidation of methyl alcohol |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946639A (en) * | 2017-03-30 | 2017-07-14 | 内蒙古大学 | A kind of Au catalyst preparation and its for gas-phase photocatalysis ethanol synthesizing ethylene, acetaldehyde, acetone method |
| CN108579794A (en) * | 2018-04-02 | 2018-09-28 | 新疆大学 | The molecular sieve catalyst of gold-supported is used to convert the method that methanol is methyl acetate |
| CN110681380A (en) * | 2019-10-22 | 2020-01-14 | 吉林师范大学 | Preparation of high-efficiency hydrogen production catalyst Au-HSTiO by liquid phase reduction2Method (2) |
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