CN101759541B - Method for preparing p-diacetylbenzene by biomimetic catalytic oxidation of p-diethylbenzene with oxygen - Google Patents
Method for preparing p-diacetylbenzene by biomimetic catalytic oxidation of p-diethylbenzene with oxygen Download PDFInfo
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Abstract
The invention relates to a method for preparing p-diacetylbenzene by biomimetic catalytic oxidation of p-diethylbenzene with oxygen, comprising the following steps: taking p-diethylbenzene as the raw material, selecting any one of 1-30ppm of mononuclear metalloporphyrin and mu-oxo-dinuclear metalloporphyrin or the composition of the two substances as the catalyst under normal pressure and in the absence of solvents, introducing oxygen at the flow rate of 10-60mL/min, initiating reaction at 140-170 DEG C and then carrying out reaction at 80-130 DEG C for 10-20h, thus obtaining the p-diacetylbenzene. In the method, the way of high temperature quick initiation and low temperature reaction is adopted, thus minimizing the reaction initiation time, greatly shortening the reaction time, improving the reaction efficiency, reducing the energy consumption, lowering the operation cost and improving the reaction safety.
Description
Technical field
The present invention relates to a kind of preparation method of aromatic ketone, specifically, relate to a kind of method of preparing p-diacetylbenzene by biomimetic catalytic oxidation of p-diethylbenzene with oxygen.
Background technology
Be important organic synthesis intermediate to diacetyl benzene, be widely used in synthetic medicine, agricultural chemicals, dyestuff, essence and flavoring agent, perfume etc.At present to the main friedel-crafts acylation method of the preparation method of diacetyl benzene and p-Diethylbenzene oxidation style etc.; wherein the p-Diethylbenzene oxidation style is divided into again chemical oxidization method and molecular oxygen oxidation method; oxygen is as cheap and easy to get, cleanliness without any pollution and the good oxygenant of Atom economy; by the method for oxygen to directly oxidize p-Diethylbenzene preparation to diacetyl benzene, has significant superiority with respect to other method.
JP 2001226307 (open day: on February 16th, 2000) disclose a kind of co-catalyst that is formed by at least a material at least a metallic compound and ammoniacal liquor, organic bases or the halide salt; halogen compounds is made promotor; containing under solvent or the solvent-free condition; the oxidation of catalytic molecular oxygen contains the alkylaromatic hydrocarbon of two or more methylene radical; preparation contains the method for the aromatic compound of two or more acyl groups, needs to be isolated and excluded at any time the water that generates in the reaction in the reaction.Metallic compound preferable alloy salt wherein, the preferred cobalt of positively charged ion, manganese and cerium; The preferred chlorine of negatively charged ion, bromine and acetic acid, its consumption are 0.001～0.5% of raw material weight.Organic bases preferred amines compounds most preferably is tertiary amine compounds, and the total mole number of ammoniacal liquor, organic bases or halide salt is 0.1～30 times of metallic compound mole number.The preferred brominated compound of halogen compounds, its mole number is 0.5～30 times of metallic compound mole number.The preferred solvent-free or high boiling solvent of solvent, its consumption are half of raw material weight or still less.Preferred 0.05～the 10MPa of reaction pressure.Preferred 80～250 ℃ of temperature of reaction.Typical embodiment is as follows:
In there-necked flask, add p-Diethylbenzene 80g, CoCL2 6H2O 0.0142g, pyridine 0.0189g and 47% hydrobromic acid aqueous solution 0.041g, use the Dean-Stark water trap to dewater, under the 150mL/min flow velocity, pass into air, at 120 ℃ of reaction 40h, the transformation efficiency of p-Diethylbenzene is 87.4%, and only is respectively 25.2% and 22% to selectivity and the chromatogram yield of diacetyl benzene; Do not have pyridine and hydrobromic in the presence of, the transformation efficiency of p-Diethylbenzene is 27.4%, and only is respectively 17.4% and 4.78% to selectivity and the chromatogram yield of diacetyl benzene.
The main drawback of the method is:
(1) because the catalyzer that the method is preferably used is metal-salt, ammoniacal liquor, organic bases and halide salt.The use meeting of metal-salt causes a large amount of brine wastes after reaction, and brine waste is one of the most difficult waste water that carries out biochemical treatment in the wastewater treatment process, and its result not only causes serious environmental pollution, and can consume a large amount of energy and resource.And ammoniacal liquor, organic bases, the halide salt that especially contains chlorine or bromine at high temperature can cause very serious corrosion to equipment.In case be used for suitability for industrialized production, will increase significantly investment and the process cost of equipment;
(2) the preferred bromine-containing compound of the method is as promotor.The use of promotor has not only increased production cost, and can cause very serious corrosion to equipment, and must increase significantly investment and the process cost of equipment, also can increase a large amount of brine wastes after the reaction in addition, environment is caused larger pollution, consume the more energy and resource;
(3) although the method has been used multiple catalysts; and added promotor; but its activity and selectivity is still extremely low; as p-Diethylbenzene the reaction 40h after; just can reach 87.4% transformation efficiency, especially selectivity and the chromatogram yield of diacetyl benzene only are respectively 25.2% and 22%, if do not have pyridine and hydrobromic in the presence of; the transformation efficiency of p-Diethylbenzene only is 27.4%, and only is respectively 17.4% and 4.78% to selectivity and the chromatogram yield of diacetyl benzene.Low selectivity like this, not only waste a large amount of raw materials, increased production cost, and the existence of a large amount of by products brings very large difficulty to last handling process, need to consume a large amount of energy and resource, cause simultaneously very serious environmental pollution, so the method may not be used for suitability for industrialized production;
(4) air velocity (150mL/min) of the method use is excessive, and too high gas flow rate, not only can cause the waste of the energy and resource, even and use reflux exchanger also can take more reaction raw materials and product out of in the tail gas exit in the actual production process, help its recovery and have to consume more heat-eliminating medium, the result can make production cost be multiplied.
(5) the method need to be isolated and excluded the water that generates in the reaction at any time.Not only need to increase the investment of equipment and in actual production process, dewater at any time, and need to consume a large amount of energy, and can cause the waste of raw material.
The bionic catalysis system has the incomparable advantage of traditional metal salt catalyst system, catalyst levels is few, but natural degradation, do not produce secondary pollution, reaction conditions is gentle, solvent-free, neutrality or basic solvent replace the serious acid solvent of equipment corrosion, and selectivity of product is high, separates simple.
At present, adopt bionic catalysis system catalysis p-Diethylbenzene oxidation preparation that the method for diacetyl benzene be there is not yet bibliographical information, and only have the bibliographical information that uses other ethylbenzene series compound of bionic catalysis system catalysis to prepare corresponding arone.Main method has following several:
Valiollah Mirkhani (Applied Catalysis A:General, 2006,303:221-229) with Majid Moghadam (Catalysis Communications, 2005,6:688-693) etc. the people has reported the loaded metal porphyrin in the solution of acetonitrile/water 1: 1 (volume ratio), uses NaIO
4As oxygenant, but the highly selectivies such as oxidation ethylbenzene and n-proplbenzene obtain corresponding arone, catalyzer: raw material: oxygenant=1: 80: 160 (mol ratio), the yield of methyl phenyl ketone can reach 55%.The main drawback of the method is to use respectively NaIO expensive and that environmental pollution is serious
4As chemical oxidizing agent, acetonitrile solution as solvent.
Shi-Jun Li (Tetrahedron Letters, 2005,46:8013-8015) etc. the people has reported chloramine-T/O
2/ complex of metalloporphyrin is in the acetonitrile equal solvent, and the Oxidation Ethylbenzene series compound obtains corresponding arone under the room temperature, catalyzer: raw material: chloramine-T=1: 20: 10 (mol ratio), the yield of methyl phenyl ketone can reach 67%.The main drawback of the method be must use respectively expensive and chloramine-T that environmental pollution is serious as chemical oxidizing agent, acetonitrile as solvent.
Lee brace (Journal of Molecular Catalysis, 2008,22 (3): 209-213) etc. the people has reported that metalloporphyrin/high price salt system is solvent-free, 1.5MPa, under 100 ℃ of conditions, oxygen catalytic oxidation ethylbenzene series compound obtains corresponding arone, under the condition that does not have high-valency metal salt to exist, the yield of methyl phenyl ketone is 36.3%, adds the serious K of environmental pollution
2Cr
2O
7After, yield can bring up to 51.0%.Its employed high-valency metal salt is mainly Na
2MoO
4, K
2Cr
2O
7, KMnO
4The main drawback of the method is that reaction needed employing energy consumption is high, the condition of high voltage of operational hazards, and must use the high-valency metal salt expensive, that environmental pollution is serious.
Rong-Min Wang (Journal of Applied Polymer Science, 1998,67:2027-2034) etc. the people has reported that poly-porphyrin is under 60～90 ℃ of conditions, oxygen catalytic oxidation Preparation of ethylbenzene methyl phenyl ketone, the catalytic amount that every 15mmol raw material needs is 6mg (480ppm), reaction 8～9h, the methyl phenyl ketone yield is 13.7%, selectivity is 99%.The main drawback of the method is that catalyst levels is large, and catalyst separating, recovery and purification power consumption are high.And because this reaction is inhomogeneous reaction, although the highly selective of catalysis of metalloporphyrin agent has obtained fine embodiment, its high catalytic activity does not display fully, and the methyl phenyl ketone yield only reaches 13.7%.
Peng Qingjing (Acta PhySico-Chimica Sinica, 2001,17 (4): 292-294) reported [TPPMn]
2O catalytic air oxidation Preparation of ethylbenzene methyl phenyl ketone, it is 60～85 ℃ that temperature is selected in reaction, reaction selects benzene, chlorobenzene, butanone, pimelinketone as solvent or solvent-free.As use butanone or pimelinketone as solvent, and then there is not induction time in this reaction, and uses benzene or chlorobenzene as solvent, and then there is the induction time of 3h in this reaction.The main drawback of the method is that reaction induction time is long, and used solvent environment is unfriendly, and particularly benzene or chlorobenzene have limited use industrial.
In sum, the following main drawback of bionic catalysis method for oxidation existence for preparing at present other ethylbenzene compounds:
(1) use chemical oxidizing agent, not only produce in process of production poisonous, harmful in a large number waste water, waste residue, cause serious environmental pollution, and raw material and production cost become very high accordingly;
(2) use solvent, even the benzene or the chlorobenzene that use industrial restriction to use.Cause increasing of energy consumption not only because its poisonous and harmful may cause serious environmental pollution, and because of the recovery of solvent, greatly increased process cost and production cost;
(3) because use the reaction conditions of high pressure, cause facility investment and running cost to be multiplied, energy consumption is high, particularly makes to produce to have potential danger, and security reduces greatly;
(4) working load or polymer/metallic porphyrin cause because preparation process is complicated that energy consumption is high, three waste discharge is many, complex process, cost increase.Because of catalyst levels large (480ppm), use afterwards also necessary Separation and Recovery, and the cost of Separation and Recovery catalyzer is high, energy consumption is large in addition, three waste discharge is many.Also have, because the reaction of working load or polymer/metallic porphyrin is inhomogeneous reaction, the high catalytic activity of metalloporphyrin can not get good embodiment.
(5) induction time oversize (reaching 3h) of reaction, thereby make the time lengthening of whole reaction causes the increase of the serious and process cost of energy dissipation.
Summary of the invention
The object of the present invention is to provide a kind of yield higher, induction time is extremely short, and the method for eco-friendly metalloporphyrin preparing p-diacetylbenzene by biomimetic catalytic oxidation of p-diethylbenzene with oxygen.
The method of a kind of preparing p-diacetylbenzene by biomimetic catalytic oxidation of p-diethylbenzene with oxygen provided by the present invention; the steps include: take p-Diethylbenzene as raw material; under normal pressure, condition of no solvent; select the monokaryon metalloporphyrin of have formula (I), formula (II) structure and have any one or two kinds of combinations in the μ-oxygen of formula (III) structure-dinuclear metalloporphyrin as catalyzer; wherein, central metallic ions M
1Be iron, manganese, cobalt, copper, zinc, nickel or chromium, central metallic ions M
2Be iron, manganese, cobalt, nickel, chromium, molybdenum or ruthenium, central metallic ions M
3With central metallic ions M
4Identical or different, be iron, manganese or cobalt when identical, not simultaneously, M
3Be iron, M
4Be manganese, M
3Be iron, M
4Be cobalt or M
3Be manganese, M
4Be cobalt, substituent R
11, R
12, R
13, R
21, R
22, R
23, R
31, R
32Or R
33Be hydrogen, halogen, nitro, hydroxyl, C
1-3Alkyl, C
1-3Alkoxyl group or carboxyl, dentate X is halogen, and described catalyzer also comprises the middle substituting group of formula (I) and formula (I), formula (II) and formula (II), formula (III) and formula (III) and substituent position is identical, central metallic ions M
1, M
2, M
3Or M
4Different combinations; Also comprise the middle substituting group of formula (I) and formula (I), formula (II) and formula (II), formula (III) and formula (III) and the combination that substituent position is different, central metallic ions is identical or different,
Catalyst levels is 1～30ppm, passes into oxygen with 10～60mL/min flow velocity, first 140～170 ℃ of lower high temperature initiation reactions; then at 80～130 ℃ of lower low-temp reaction 10～20h; reacted mixture is used ethyl alcohol recrystallization again through freezing, centrifuging, obtains diacetyl benzene.
Preferred M
1, M
2, M
3Or M
4Be iron, manganese or cobalt, M
3And M
4Identical; Particularly preferably when any two kinds of catalyst combination, a kind of M wherein
1, M
2, M
3Or M
4Be iron or manganese, another kind of M
1, M
2, M
3Or M
4Be cobalt, the mol ratio of iron porphyrin or manganoporphyrin and cobalt porphyrin is 1: 1～10.
The preferred chlorine of dentate X.
The preferred catalyst consumption is 5～15ppm.Preferred oxygen gas flow rate is 30～50mL/min.Preferred kick off temperature is 150～160 ℃.Preferable reaction temperature is 100～120 ℃.The preferred reaction time is 16～18h.
The inventive method is compared with JP 2001226307 disclosed methods, has following beneficial effect:
(1) present method substitutes environmental pollution that JP 2001226307 uses serious metallic compound, ammoniacal liquor, organic bases and halide salt directly as catalyzer with the environmental friendliness metal porphyrins, has eliminated the problem of brine waste and equipment corrosion fully.Because the amount of the used metalloporphyrin of present method is few, do not need after the reaction to separate, reclaim, avoided the generation of separation, recovery, purification process energy consumption.Simultaneously, but metalloporphyrin natural degradation in environment can not produce secondary pollution;
(2) present method is not used any promotor, does not have any problem that causes because of promotor.
(3) present method uses metalloporphyrin as bionic catalyst, has high reactivity, the highly selective characteristics of approximate enzyme.Present method is behind reaction 18h, the p-Diethylbenzene peak rate of conversion just can reach 90.4%, selectivity and chromatogram yield to diacetyl benzene reach respectively 73.9% and 66.8%, separation yield also can reach 62.3%, the selectivity of principal product and chromatogram yield are all far above JP 2001226307 disclosed 25.2% and 22%, and the minimizing in reaction times, have not only accelerated the production cycle, and reduced energy consumption, reduced process cost;
(4) the preferred oxygen gas flow rate of present method is 30～50mL/min, the 150mL/min gas flow rate that adopts far below JP 2001226307.The energy and resource have not only been saved in the reduction of gas flow rate, have increased the security of reaction, even and do not use reflux exchanger also can not take reaction raw materials and product out of in the tail gas exit in actual production process.
(5) the method does not need to be isolated and excluded the water that generates in the reaction, and the existence of little water can also slow down speed of reaction, increases the security of reaction.
The inventive method is compared with the method for aforesaid other ethylbenzene series compound of bionic catalysis oxidation, has following beneficial effect:
(1) present method uses cleaning, cheap oxygen to replace serious, the expensive NaIO of environmental pollution
4With the chemical oxidizing agents such as chloramine-T as oxygenant.Not only greatly reduce environmental pollution, and significantly reduced production cost;
(2) present method is not used solvent.Not only eliminate the poisonous and harmful solvent fully and may cause serious environmental pollution, and because there is not the recovery problem of solvent, and the energy consumption of production process and cost are reduced greatly;
(3) present method is only carried out under condition of normal pressure, with respect to the reaction under high pressure in the documents, facility investment, energy consumption and running cost is all significantly reduced, and the security of whole production process is greatly improved;
(4) present method with the metal porphyrins of minute quantity directly as catalyzer, and do not use the very complicated load of preparation process or polymer/metallic porphyrin as catalyzer, simplified the preparation process of catalyzer, can greatly reduce catalyzer and prepare the environmental pollution that required energy consumption and preparation process produce.And, because the consumption of catalysis of metalloporphyrin agent is few, do not need after the reaction to separate, reclaim, avoided the generation of separation, recovery, purification process energy consumption.Simultaneously, but because metalloporphyrin natural degradation in environment, can not produce secondary pollution.Metalloporphyrin is directly as catalyzer, and reaction system is similar to homogeneous system, has increased contact probability and the reaction efficiency of metalloporphyrin and substrate, makes the high catalytic activity of metalloporphyrin obtain good embodiment;
(5) present method adopts high temperature to cause fast, and the mode of low-temp reaction makes reaction induction time become extremely short, has greatly shortened the time of reaction, has improved reaction efficiency, has reduced process cost and energy consumption.Low-temp reaction then helps to improve the selectivity of product, has reduced the generation of by product, and the separation of product is become be more prone to, and the energy consumption of reaction and separation processes all reduces greatly, and the security of production is improved.
Embodiment
Embodiment 1
In the 100mL there-necked flask, add the 13.474g p-Diethylbenzene, 1ppm (0.07mg) tetraphenyl iron porphyrin (is R in the formula (I)
11Be H, R
12Be H, R
13Be H, M
1Be Fe), 10ppm (0.86mg) four-(rubigan) cobalt porphyrin (is R in the formula (I)
11Be H, R
12Be H, R
13Be Cl, M
1Be Co), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 18h.Reacted mixture obtains diacetyl benzene with ethyl alcohol recrystallization through freezing, centrifuging again, and the p-Diethylbenzene transformation efficiency is 80.4%, is 59.8% to diacetyl benzene yield, and purity is 99.1%.
Embodiment 2
In the 100mL there-necked flask, add the 13.432g p-Diethylbenzene, 5ppm (0.38mg) chlorination four-phenyl manganoporphyrin (is R in the formula (II)
21Be H, R
22Be H, R
23Be H, M
2Be Mn, X is Cl), 5ppm (0.44mg) chlorination four-(o-methoxyphenyl) cobalt porphyrins (are R in the formula (II)
21Be OCH
3, R
22Be H, R
23Be H, M
2Be Co, X is Cl), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 85.1%, is 62.2% to diacetyl benzene yield, and purity is 99.3%.
Embodiment 3
In the 100mL there-necked flask, add the 13.487g p-Diethylbenzene, 1ppm (0.15mg) μ-oxygen-double-core four-phenyl iron porphyrin (is R in the formula (III)
31Be H, R
32Be H, R
33Be H, M
3, M
4Be Fe), 5ppm (0.88mg) μ-oxygen-double-core four-(rubigan) cobalt porphyrin (is R in the formula (III)
31Be H, R
32Be H, R
33Be Cl, M
3, M
4Be Co), under the 50mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 100 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 75.3%, is 50.6% to diacetyl benzene yield, and purity is 99.4%.
Embodiment 4
In the 100mL there-necked flask, add the 13.432g p-Diethylbenzene, 5ppm (0.45mg) chlorination four-(p-methoxyphenyl) iron porphyrins (are R in the formula (II)
21Be H, R
22Be H, R
23Be OCH
3, M
2Be Fe, X is Cl), 10ppm (1.78mg) μ-oxygen-double-core four-(rubigan) cobalt porphyrin (is R in the formula (III)
31Be H, R
32Be H, R
33Be Cl, M
3, M
4Be Co), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 90.4%, is 62.3% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 5
In the 100mL there-necked flask, add the 13.448g p-Diethylbenzene, 1ppm (0.08mg) four-(o-methoxyphenyl) copper porphyrin (is R in the formula (I)
11Be OCH
3, R
12Be H, R
13Be H, M
1Be Cu), 10ppm (0.88mg) chlorination four-(o-methoxyphenyl) cobalt porphyrins (are R in the formula (II)
21Be OCH
3, R
22Be H, R
23Be H, M
2Be Co, X is Cl), under the 50mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 20h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 93.2%, is 59.8% to diacetyl benzene yield, and purity is 99.8%.
Embodiment 6
In the 100mL there-necked flask, add the 13.533g p-Diethylbenzene, 1ppm (0.07mg) chlorination four-phenyl manganoporphyrin (is R in the formula (II)
21Be H, R
22Be H, R
23Be H, M
2Be Mn, X is Cl), 10ppm (0.92mg) four-(O-Nitrophenylfluorone) cobalt porphyrin (is R in the formula (I)
11Be NO
2, R
12Be H, R
13Be H, M
1Be Co), under the 30mL/min flow velocity, pass into oxygen, 140 ℃ of lower initiation reactions, at 130 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 87.8%, is 55.4% to diacetyl benzene yield, and purity is 99.8%.
Embodiment 7
In the 100mL there-necked flask, add the 13.433g p-Diethylbenzene, 5ppm (0.75mg) μ-oxygen-double-core four-phenyl iron porphyrin (is R in the formula (III)
31Be H, R
32Be H, R
33Be H, M
3, M
4Be Fe), 10ppm (0.89mg) four-(rubigan) cobalt porphyrin (is R in the formula (I)
11Be H, R
12Be H, R
13Be Cl, M
1Be Co), under the 20mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 100 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 70.8%, is 49.8% to diacetyl benzene yield, and purity is 99.4%.
Embodiment 8
In the 100mL there-necked flask, add the 13.422g p-Diethylbenzene, 5ppm (0.47mg) four-(p-nitrophenyl) zinc protoporphyrin (is R in the formula (I)
11Be H, R
12Be H, R
13Be NO
2, M
1Be Zn), 10ppm (0.77mg) chlorination four-phenyl manganoporphyrin (is R in the formula (II)
21Be H, R
22Be H, R
23Be H, M
2Be Mn, X is Cl), under the 50mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 20h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 78.6%, is 47.2% to diacetyl benzene yield, and purity is 99.9%.
Embodiment 9
In the 100mL there-necked flask, add the 13.432g p-Diethylbenzene, 20ppm (1.47mg) four-phenyl iron porphyrin (is R in the formula (I)
11Be H, R
12Be H, R
13Be H, M
1Be Fe), under the 30mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 80 ℃ of lower reaction 20h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 45.4%, is 26.8% to diacetyl benzene yield, and purity is 99.1%.
Embodiment 10
In the 100mL there-necked flask, add the 13.533g p-Diethylbenzene, 10ppm (0.86mg) four-(rubigan) cobalt porphyrin (is R in the formula (I)
11Be H, R
12Be H, R
13Be Cl, M
1Be Co), under the 20mL/min flow velocity, pass into oxygen, 170 ℃ of lower initiation reactions, at 100 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 50.4%, is 31.2% to diacetyl benzene yield, and purity is 99.7%.
Embodiment 11
In the 100mL there-necked flask, add the 13.388g p-Diethylbenzene, 15ppm (1.30mg) four-(m-nitro base) manganoporphyrin (is R in the formula (I)
11Be H, R
12Be NO
2, R
13Be H, M
1Be Mn), under the 30mL/min flow velocity, pass into oxygen, 160 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 53.9%, is 32.8% to diacetyl benzene yield, and purity is 99.8%.
Embodiment 12
In the 100mL there-necked flask, add the 13.396g p-Diethylbenzene, 30ppm (2.43mg) four-(p-hydroxybenzene) nickel-porphyrin (is R in the formula (I)
11Be H, R
12Be H, R
13Be OH, M
1Be Ni), under the 20mL/min flow velocity, pass into oxygen, 170 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 54.7%, is 33.6% to diacetyl benzene yield, and purity is 99.5%.
Embodiment 13
In the 100mL there-necked flask, add the 13.427g p-Diethylbenzene, 20ppm (1.83mg) four-(p-nitrophenyl) zinc protoporphyrin (is R in the formula (I)
11Be H, R
12Be H, R
13Be NO
2, M
1Be Zn), under the 30mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 40.7%, is 20.4% to diacetyl benzene yield, and purity is 99.5%.
Embodiment 14
In the 100mL there-necked flask, add the 13.404g p-Diethylbenzene, 20ppm (1.73mg) four-(Chloro-O-Phenyl) chromium porphyrin (is R in the formula (I)
11Be Cl, R
12Be H, R
13Be H, M
1Be Cr), under the 20mL/min flow velocity, pass into oxygen, 170 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 45.6%, is 24.3% to diacetyl benzene yield, and purity is 99.6%.
Embodiment 15
In the 100mL there-necked flask, add the 13.407g p-Diethylbenzene, 20ppm (1.74mg) four-(o-methoxyphenyl) copper porphyrin (is R in the formula (I)
11Be OCH
3, R
12Be H, R
13Be H, M
1Be Cu), under the 30mL/min flow velocity, pass into oxygen, 160 ℃ of lower initiation reactions, at 125 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 40.9%, is 20.8% to diacetyl benzene yield, and purity is 99.6%.
Embodiment 16
In the 100mL there-necked flask, add the 13.432g p-Diethylbenzene, 15ppm (1.21mg) four-(carboxyl phenyl) manganoporphyrin (is R in the formula (I)
11Be H, R
12Be COOH, R
13Be H, M
1Be Mn), under the 30mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 76.8%, is 49.2% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 17
In the 100mL there-necked flask, add the 13.402g p-Diethylbenzene, 10ppm (0.92mg) four-(O-Nitrophenylfluorone) cobalt porphyrin (is R in the formula (I)
11Be NO
2, R
12Be H, R
13Be H, M
1Be Co), under the 30mL/min flow velocity, pass into oxygen, 170 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 78.6%, is 50.9% to diacetyl benzene yield, and purity is 99.3%.
Embodiment 18
In the 100mL there-necked flask, add the 13.401g p-Diethylbenzene, 10ppm (0.78mg) chlorination four-phenyl manganoporphyrin (is R in the formula (II)
21Be H, R
22Be H, R
23Be H, M
2Be Mn, X is Cl), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 80.4%, is 55.4% to diacetyl benzene yield, and purity is 99.3%.
Embodiment 19
In the 100mL there-necked flask, add the 13.403g p-Diethylbenzene, 5ppm (0.45mg) chlorination four-(rubigan) cobalt porphyrins (are R in the formula (II)
21Be H, R
22Be H, R
23Be Cl, M
2Be Co, X is Cl), under the 20mL/min flow velocity, pass into oxygen, 170 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 70.3%, is 46.2% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 20
In the 100mL there-necked flask, add the 13.421g p-Diethylbenzene, 15ppm (1.32mg) chlorination four-(p-methoxyphenyl) iron porphyrins (are R in the formula (II)
21Be H, R
22Be H, R
23Be OCH
3, M
2Be Fe, X is Cl), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 65.2%, is 40.8% to diacetyl benzene yield, and purity is 99.4%.
Embodiment 21
In the 100mL there-necked flask, add the 13.424g p-Diethylbenzene, 10ppm (0.75mg) bromination four-phenyl molybdenum porphyrin (is R in the formula (II)
21Be H, R
22Be H, R
23Be H, M
2Be Mo, X is Br), under the 40mL/min flow velocity, pass into oxygen, 160 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 10h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 40.4%, is 19.8% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 22
In the 100mL there-necked flask, add the 13.374g p-Diethylbenzene, 20ppm (1.93mg) chlorination four-(p-nitrophenyl) chromium porphyrins (are R in the formula (II)
21Be H, R
22Be H, R
23Be NO
2, M
2Be Cr, X is Cl), under the 40mL/min flow velocity, pass into oxygen, 170 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 70.4%, is 42.1% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 23
In the 100mL there-necked flask, add the 13.484g p-Diethylbenzene, 20ppm (1.84mg) chlorination four-(Chloro-O-Phenyl) manganoporphyrins (are R in the formula (II)
21Be Cl, R
22Be H, R
23Be H, M
2Be Mn, X is Cl), under the 50mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 80.6%, is 53.7% to diacetyl benzene yield, and purity is 99.4%.
Embodiment 24
In the 100mL there-necked flask, add the 13.465g p-Diethylbenzene, 5ppm (0.45mg) chlorination four-(o-methoxyphenyl) cobalt porphyrins (are R in the formula (II)
21Be OCH
3, R
22Be H, R
23Be H, M
2Be Co, X is Cl), under the 50mL/min flow velocity, pass into oxygen, 160 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 76.3%, is 49.8% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 25
In the 100mL there-necked flask, add the 13.401g p-Diethylbenzene, 15ppm (1.36mg) chlorination four-(O-Nitrophenylfluorone) nickel-porphyrins (are R in the formula (II)
21Be NO
2, R
22Be H, R
23Be H, M
2Be Ni, X is Cl), under the 50mL/min flow velocity, pass into oxygen, 170 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 60.1%, is 33.1% to diacetyl benzene yield, and purity is 99.5%.
Embodiment 26
In the 100mL there-necked flask, add the 13.402g p-Diethylbenzene, 10ppm (0.81mg) fluoridizes-and tetraphenyl ruthenium porphyrin (is R in the formula (II)
21Be H, R
22Be H, R
23Be H, M
2Be Ru, X is F), under the 50mL/min flow velocity, pass into oxygen, 160 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 14h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 45.3%, is 21.3% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 27
In the 100mL there-necked flask, add the 13.421g p-Diethylbenzene, 10ppm (1.48mg) μ-oxygen-double-core four-phenyl iron porphyrin (is R in the formula (III)
31Be H, R
32Be H, R
33Be H, M
3, M
4Be Fe), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 100 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 56.8%, is 25.7% to diacetyl benzene yield, and purity is 99.1%.
Embodiment 28
In the 100mL there-necked flask, add the 13.423g p-Diethylbenzene, 1ppm (0.19mg) μ-oxygen-double-core four-(p-nitrophenyl) manganoporphyrin (is R in the formula (III)
31Be H, R
32Be H, R
33Be NO
2, M
3, M
4Be Mn), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 69.5%, is 43.2% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 29
In the 100mL there-necked flask, add the 13.424g p-Diethylbenzene, 5ppm (0.89mg) μ-oxygen-double-core four-(rubigan) cobalt porphyrin (is R in the formula (III)
31Be H, R
32Be H, R
33Be Cl, M
3, M
4Be Co), under the 40mL/min flow velocity, pass into oxygen, 170 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 72.4%, is 46.3% to diacetyl benzene yield, and purity is 99.5%.
Embodiment 30
In the 100mL there-necked flask, add the 13.426g p-Diethylbenzene, 5ppm (0.89mg) μ-oxygen-double-core four-(p-methoxyphenyl) iron-cobalt porphyrin (is R in the formula (III)
31Be H, R
32Be H, R
33Be OCH
3, M
3Be Fe, M
4Be Co), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 85.7%, is 50.9% to diacetyl benzene yield, and purity is 99.1%.
Embodiment 31
In the 100mL there-necked flask, add the 13.424g p-Diethylbenzene, 10ppm (1.63mg) μ-oxygen-double-core four-(p-hydroxybenzene) manganese-cobalt porphyrin (is R in the formula (III)
31Be H, R
32Be H, R
33Be OH, M
3Be Mn, M
4Be Co), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 85.6%, is 55.6% to diacetyl benzene yield, and purity is 99.3%.
Embodiment 32
In the 100mL there-necked flask, add the 13.432g p-Diethylbenzene, 10ppm (1.83mg) μ-oxygen-double-core four-(O-Nitrophenylfluorone) cobalt porphyrin (is R in the formula (III)
31Be NO
2, R
32Be H, R
33Be H, M
3, M
4Be Co), under the 40mL/min flow velocity, pass into oxygen, 170 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 82.1%, is 55.1% to diacetyl benzene yield, and purity is 99.1%.
Embodiment 33
In the 100mL there-necked flask, add the 13.425g p-Diethylbenzene, 10ppm (1.75mg) μ-oxygen-double-core four-(Chloro-O-Phenyl) manganoporphyrin (is R in the formula (III)
31Be Cl, R
32Be H, R
33Be H, M
3, M
4Be Mn), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 110 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 80.4%, is 51.4% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 34
In the 100mL there-necked flask, add the 13.464g p-Diethylbenzene, 10ppm (1.77mg) μ-oxygen-double-core four-(o-methoxyphenyl) manganese-cobalt porphyrin (is R in the formula (III)
31Be OCH
3, R
32Be H, R
33Be H, M
3Be Mn, M
4Be Co), under the 30mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 18h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 80.6%, is 52.8% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 35
In the 100mL there-necked flask, add the 13.424g p-Diethylbenzene, 10ppm (1.87mg) μ-oxygen-double-core four-(m-nitro base) iron-cobalt porphyrin (is R in the formula (III)
31Be H, R
32Be NO
2, R
33Be H, M
3Be Fe, M
4Be Co), under the 30mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 16h.Reacted mixture is freezing, centrifuging, obtains diacetyl benzene with ethyl alcohol recrystallization again, and the p-Diethylbenzene transformation efficiency is 82.4%, is 51.2% to diacetyl benzene yield, and purity is 99.6%.
Embodiment 36
In the 100mL there-necked flask, add the 13.414g p-Diethylbenzene, 1ppm (0.18mg) μ-oxygen-double-core four-(Chloro-O-Phenyl) iron porphyrin (is R in the formula (III)
31Be Cl, R
32Be H, R
33Be H, M
3, M
4Be Fe), 10ppm (1.78mg) μ-oxygen-double-core four-(Chloro-O-Phenyl) cobalt porphyrin (is R in the formula (III)
31Be Cl, R
32Be H, R
33Be H, M
3, M
4Be Co), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 16h.Reacted mixture is used ethyl alcohol recrystallization again through freezing, centrifuging, obtains diacetyl benzene, and the p-Diethylbenzene transformation efficiency is 87.2%, is 54.9% to diacetyl benzene yield, and purity is 99.2%.
Embodiment 37
In the 100mL there-necked flask, add the 13.418g p-Diethylbenzene, 5ppm (0.90mg) four-(p-methylphenyl) zinc protoporphyrin (is R in the formula (I)
11Be H, R
12Be H, R
13Be CH
3, M
1Be Zn), 10ppm (0.92mg) four-(p-nitrophenyl) zinc protoporphyrin (is R in the formula (I)
11Be H, R
12Be H, R
13Be NO
2, M
1Be Zn), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 18h.Reacted mixture is used ethyl alcohol recrystallization again through freezing, centrifuging, obtains diacetyl benzene, and the p-Diethylbenzene transformation efficiency is 55.1%, is 32.4% to diacetyl benzene yield, and purity is 99.1%.
Embodiment 38
In the 100mL there-necked flask, add the 13.403g p-Diethylbenzene, 5ppm (0.91mg) four-(2,4-3,5-dimethylphenyl) zinc protoporphyrin (is R in the formula (I)
11Be CH
3, R
12Be H, R
13Be CH
3, M
1Be Zn), 10ppm (0.92mg) four-(2,4-dinitrophenyl) zinc protoporphyrin (is R in the formula (I)
11Be NO
2, R
12Be H, R
13Be NO
2, M
1Be Zn), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 18h.Reacted mixture is used ethyl alcohol recrystallization again through freezing, centrifuging, obtains diacetyl benzene, and the p-Diethylbenzene transformation efficiency is 60.3%, is 38.7% to diacetyl benzene yield, and purity is 99.4%.
Embodiment 39
In the 100mL there-necked flask, add the 13.407g p-Diethylbenzene, 5ppm (0.44mg) bromination four-(O-Nitrophenylfluorone) iron porphyrins (are R in the formula (II)
21Be NO
2, R
22Be H, R
23Be H, M
2Be Fe, X is Br), 10ppm (0.88mg) chlorination four-(p-methoxyphenyl) iron porphyrins (are R in the formula (II)
21Be H, R
22Be H, R
23Be OCH
3, M
2Be Fe, X is Cl), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 16h.Reacted mixture is used ethyl alcohol recrystallization again through freezing, centrifuging, obtains diacetyl benzene, and the p-Diethylbenzene transformation efficiency is 74.3%, is 47.2% to diacetyl benzene yield, and purity is 99.6%.
Embodiment 40
In the 100mL there-necked flask, add the 13.416g p-Diethylbenzene, 5ppm (0.82mg) μ-oxygen-double-core four-(p-hydroxybenzene) manganoporphyrin (is R in the formula (III)
31Be H, R
32Be H, R
33Be OH, M
3, M
4Be Mn), 10ppm (1.75mg) μ-oxygen-double-core four-(Chloro-O-Phenyl) manganoporphyrin (is R in the formula (III)
31Be Cl, R
32Be H, R
33Be H, M
3, M
4Be Mn), under the 40mL/min flow velocity, pass into oxygen, 150 ℃ of lower initiation reactions, at 120 ℃ of lower reaction 18h.Reacted mixture is used ethyl alcohol recrystallization again through freezing, centrifuging, obtains diacetyl benzene, and the p-Diethylbenzene transformation efficiency is 82.4%, is 53.6% to diacetyl benzene yield, and purity is 99.3%.
Claims (10)
1. the method for a preparing p-diacetylbenzene by biomimetic catalytic oxidation of p-diethylbenzene with oxygen; the steps include: take p-Diethylbenzene as raw material; at normal pressure; under the condition of no solvent; select and have formula (I); the monokaryon metalloporphyrin of formula (II) structure and have any one or two kinds of combinations in the μ-oxygen of formula (III) structure-dinuclear metalloporphyrin as catalyzer, or select formula (I) and formula (I); formula (II) and formula (II); formula (III) is identical with the middle substituting group of formula (III) and substituent position; central metallic ions M
1, M
2, M
3Or M
4Different combinations are as catalyzer, or select substituting group in formula (I) and formula (I), formula (II) and formula (II), formula (III) and the formula (III) and substituent position is different, central metallic ions is identical or different combination as catalyzer, wherein, central metallic ions M
1Be iron, manganese, cobalt, copper, zinc, nickel or chromium, central metallic ions M
2Be iron, manganese, cobalt, nickel, chromium, molybdenum or ruthenium, central metallic ions M
3With central metallic ions M
4Identical or different, be iron, manganese or cobalt when identical, not simultaneously, M
3Be iron, M
4Be manganese, M
3Be iron, M
4Be cobalt or M
3Be manganese, M
4Be cobalt, substituent R
11, R
12, R
13, R
21, R
22, R
23, R
31, R
32Or R
33Be hydrogen, halogen, nitro, hydroxyl, C
1-3Alkyl, C
1-3Alkoxyl group or carboxyl, dentate X are halogen,
Catalyst levels is 1～30ppm, passes into oxygen with 10～60mL/min flow velocity, first 140～170 ℃ of lower high temperature initiation reactions; then at 80～130 ℃ of lower low-temp reaction 10～20h; reacted mixture is used ethyl alcohol recrystallization again through freezing, centrifuging, obtains diacetyl benzene.
2. according to claim 1 method is characterized in that M
1, M
2, M
3Or M
4Be iron, manganese or cobalt, M
3And M
4Identical.
3. according to claim 2 method is characterized in that when any two kinds of catalyst combination, wherein the M in a kind of catalyzer
1, M
2, M
3Or M
4Be iron or manganese, the M in the another kind of catalyzer
1, M
2, M
3Or M
4Be cobalt.
4. according to claim 3 method, the mol ratio that it is characterized in that iron porphyrin or manganoporphyrin and cobalt porphyrin is 1: 1～10.
5. according to claim 1 method is characterized in that dentate X is chlorine.
6. according to claim 1 method is characterized in that catalyst levels is 5～15ppm.
7. according to claim 1 method is characterized in that oxygen gas flow rate is 30～50mL/min.
8. according to claim 1 method is characterized in that kick off temperature is 150～160 ℃.
9. according to claim 1 method is characterized in that temperature of reaction is 100～120 ℃.
10. according to claim 1 method is characterized in that the reaction times is 16～18h.
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Non-Patent Citations (4)
| Title |
|---|
| Cancheng Guo,et al..Selective oxidation of ethylbenzene with air catalyzed by simple μ-oxo dimeric metalloporphyrins under mild conditions in the absence of additives.《Journal of Molecular Catalysis A: Chemical》.2003,第192卷(第1-2期), * |
| Shi-Jun Li and Yan-Guang Wang.A novel and selective catalytic oxidation of hydrocarbons to ketones using chloramine-T/O2/Fe(TPP)Cl system.《Tetrahedron Letters》.2005,第46卷(第46期), * |
| 周贤太等.金属卟啉催化剂应用于均相氧化反应的研究进展.《有机化学》.2007,第22卷(第3期), * |
| 李小港等.过渡金属卟啉/高价盐体系催化分子氧对芳烃侧链氧化的研究.《分子催化》.2008,第22卷(第3期), * |
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