CN115925716A - Preparation method of pyromellitic dianhydride - Google Patents
Preparation method of pyromellitic dianhydride Download PDFInfo
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- CN115925716A CN115925716A CN202110973827.0A CN202110973827A CN115925716A CN 115925716 A CN115925716 A CN 115925716A CN 202110973827 A CN202110973827 A CN 202110973827A CN 115925716 A CN115925716 A CN 115925716A
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- pyromellitic dianhydride
- vanadium
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- oxygen
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- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title abstract description 37
- 239000003054 catalyst Substances 0.000 claims abstract description 71
- 238000000034 method Methods 0.000 claims abstract description 45
- 239000001301 oxygen Substances 0.000 claims abstract description 35
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 35
- VTIBBOHXBURHMD-UHFFFAOYSA-N 1,2,3,4,4a,5,10,10a-octahydroanthracene Chemical compound C1=CCC2CC(CCCC3)C3=CC2=C1 VTIBBOHXBURHMD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- SKKMWRVAJNPLFY-UHFFFAOYSA-N azanylidynevanadium Chemical compound [V]#N SKKMWRVAJNPLFY-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 230000003197 catalytic effect Effects 0.000 claims abstract description 9
- 239000003960 organic solvent Substances 0.000 claims abstract description 8
- 239000007800 oxidant agent Substances 0.000 claims abstract description 7
- 230000001590 oxidative effect Effects 0.000 claims abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 34
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims description 17
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 15
- 229920000877 Melamine resin Polymers 0.000 claims description 12
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 12
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 claims description 10
- -1 nitrogen-containing carbon compound Chemical class 0.000 claims description 9
- 229910052720 vanadium Inorganic materials 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 8
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 8
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 8
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- DGEZNRSVGBDHLK-UHFFFAOYSA-N [1,10]phenanthroline Chemical compound C1=CN=C2C3=NC=CC=C3C=CC2=C1 DGEZNRSVGBDHLK-UHFFFAOYSA-N 0.000 claims description 6
- SIOXPEMLGUPBBT-UHFFFAOYSA-N picolinic acid Chemical compound OC(=O)C1=CC=CC=N1 SIOXPEMLGUPBBT-UHFFFAOYSA-N 0.000 claims description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 4
- CMZUMMUJMWNLFH-UHFFFAOYSA-N sodium metavanadate Chemical compound [Na+].[O-][V](=O)=O CMZUMMUJMWNLFH-UHFFFAOYSA-N 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- 229920001661 Chitosan Polymers 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 claims description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 2
- FDPIMTJIUBPUKL-UHFFFAOYSA-N dimethylacetone Natural products CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 claims description 2
- LRDFRRGEGBBSRN-UHFFFAOYSA-N isobutyronitrile Chemical compound CC(C)C#N LRDFRRGEGBBSRN-UHFFFAOYSA-N 0.000 claims description 2
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 claims description 2
- 238000010304 firing Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 60
- 239000007791 liquid phase Substances 0.000 abstract description 6
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 2
- 239000012847 fine chemical Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 13
- GWHJZXXIDMPWGX-UHFFFAOYSA-N 1,2,4-trimethylbenzene Chemical compound CC1=CC=C(C)C(C)=C1 GWHJZXXIDMPWGX-UHFFFAOYSA-N 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000003647 oxidation Effects 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- SQNZJJAZBFDUTD-UHFFFAOYSA-N durene Chemical compound CC1=CC(C)=C(C)C=C1C SQNZJJAZBFDUTD-UHFFFAOYSA-N 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000000227 grinding Methods 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 229910052573 porcelain Inorganic materials 0.000 description 5
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 238000011068 loading method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- LROJZZICACKNJL-UHFFFAOYSA-N Duryl aldehyde Chemical compound CC1=CC(C)=C(C=O)C=C1C LROJZZICACKNJL-UHFFFAOYSA-N 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- FAOVLNPOXYMREN-UHFFFAOYSA-N 1,2,4-trimethyl-5-propylbenzene Chemical compound CCCC1=CC(C)=C(C)C=C1C FAOVLNPOXYMREN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000011280 coal tar Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- FVIGODVHAVLZOO-UHFFFAOYSA-N Dixanthogen Chemical compound CCOC(=S)SSC(=S)OCC FVIGODVHAVLZOO-UHFFFAOYSA-N 0.000 description 1
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 150000004984 aromatic diamines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000006315 carbonylation Effects 0.000 description 1
- 238000005810 carbonylation reaction Methods 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 239000000919 ceramic Chemical group 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000006114 decarboxylation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- 150000003682 vanadium compounds Chemical class 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
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- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Abstract
The invention relates to the technical field of fine chemical synthesis, in particular to a preparation method of pyromellitic dianhydride. The method comprises the following steps: adopting vanadium-nitrogen doped carbon catalyst, taking air/oxygen as oxidant, taking symmetric octahydro anthracene as raw material, and carrying out catalytic oxidation reaction in organic solvent to obtain pyromellitic dianhydride. The preparation method of the pyromellitic dianhydride can prepare the pyromellitic dianhydride in a liquid phase under the action of the vanadium-nitrogen-doped carbon catalyst by taking the symmetric octahydroanthracene as a raw material, has mild reaction conditions, green and environment-friendly process and low cost, and can obtain the pyromellitic dianhydride with high conversion rate and selectivity.
Description
Technical Field
The invention relates to the technical field of fine chemical synthesis, in particular to a preparation method of pyromellitic dianhydride.
Background
Pyromellitic dianhydride (1, 2,4, 5-pyromellitic dianhydride, or PMDA for short) is an important chemical raw material with wide application. Polyimide synthesized from pyromellitic dianhydride and aromatic diamine is a high polymer material with high temperature resistance, deep cooling resistance, impact resistance and excellent electrical and mechanical properties. In addition, the pyromellitic dianhydride can also be used for manufacturing high-temperature-resistant electric insulating paint, a plasticizer, a synthetic resin cross-linking agent, an epoxy resin curing agent and the like. Driven by the demands of downstream industries (such as IT industry, electronic industry, automobile industry and the like), the pyromellitic dianhydride has wide market prospect.
The production method of pyromellitic dianhydride is closely related to the selection of raw materials. The adopted raw materials are different, and the selected process routes are different. At present, the following methods and routes are mainly available at home and abroad:
1. durene is used as a raw material. Including the early liquid phase oxidation process and the air-gas phase oxidation process that is currently commonly employed. US5225572 discloses V 2 O 5 -TiO 2 The optimal molar yield of pyromellitic dianhydride of the composite catalyst as the main component is 60.5 percent at the temperature of 350-380 ℃. CN201010543303.X discloses the preparation of a catalyst active component consisting of V 2 O 5 、TiO 2 And P 2 O 5 The composition is loaded on SiC or a ceramic ring. The catalyst has the advantages of low energy consumption, high selectivity and the like. The pyromellitic dianhydride production by the pyromellitic gas-phase oxidation method has simple process and can be continuously produced, but the method has the advantages of simple process and continuous productionIn the actual production, the pyromellitic gas-phase oxidation method usually needs to be carried out under the harsh high-temperature oxidation condition, which is very easy to cause decarboxylation reaction and transitional oxidation, and can generate trimellitic anhydride, maleic anhydride and other byproducts. In addition, the route depends on the supply of the raw material durene, and the cost is high.
2. Pseudocumene (1, 2, 4-trimethylbenzene) was used as the starting material. Firstly, the pseudocumene and propylene are alkylated to produce 1,2, 4-trimethyl-5-propylbenzene, then the liquid-phase or gas-phase oxidation is made to obtain the pyromellitic dianhydride. The other route is the pseudocumene/carbon monoxide carbonylation method, pseudocumene first reacts with carbon monoxide to prepare high-purity 2,4, 5-trimethylbenzaldehyde, and then the 2,4, 5-trimethylbenzaldehyde is oxidized to prepare pyromellitic dianhydride. The key to this process is the preparation of high purity intermediates such as 1,2, 4-trimethyl-5-propylbenzene or 2,4, 5-trimethylbenzaldehyde. However, the process route is long and the product yield is low.
Pyromellitic dianhydride has a special symmetrical structure, and four carboxylic acid groups are arranged in the molecule, so that the raw materials have important influence on the production cost of pyromellitic dianhydride. Besides continuously optimizing the process of the above route, developing new starting materials and fundamentally changing the production method of pyromellitic dianhydride are also one of important ideas. The method has the advantages of developing cheap and easily-obtained raw materials, adopting mild reaction conditions and a green and environment-friendly process, reducing development cost for green production of pyromellitic dianhydride and having important application value.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a preparation method of pyromellitic dianhydride, which can prepare the pyromellitic dianhydride in a liquid phase under the action of the vanadium nitrogen doped carbon catalyst by using symmetric octahydroanthracene as a raw material, has mild reaction conditions, green and environment-friendly process and low cost, and can obtain the pyromellitic dianhydride with high conversion rate and selectivity.
In order to achieve the above objects, the present invention provides a method for preparing pyromellitic dianhydride, comprising: adopting vanadium-nitrogen doped carbon catalyst, taking air/oxygen as oxidant, taking symmetric octahydro anthracene as raw material, and carrying out catalytic oxidation reaction in organic solvent to obtain pyromellitic dianhydride.
The invention can obtain the following beneficial effects:
1. the preparation method of pyromellitic dianhydride provided by the invention takes symmetric octahydroanthracene as a raw material. The symmetric octahydro anthracene can be obtained by selective hydrogenation of anthracene, and the anthracene is an important component of coal tar, so that the octahydro anthracene can be obtained from cheap coal tar, and the production cost of pyromellitic dianhydride is further reduced. Compared with the traditional method depending on durene and pseudocumene, the invention provides a brand-new preparation route.
2. The catalyst provided by the invention is cheap and easy to obtain, and can help to reduce the production cost of pyromellitic dianhydride.
3. The catalyst provided by the invention can be used for preparing pyromellitic dianhydride in a liquid phase by taking green and environment-friendly molecular oxygen as an oxidant, and compared with a high-temperature gas-phase oxidation method used in a traditional technical route, the catalyst has the advantages of mild reaction conditions, greenness, environmental protection and wide application prospect.
Drawings
Fig. 1 is an XRD pattern of the catalyst prepared in preparation example 1.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and these ranges or values should be understood to encompass values close to these ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In a first aspect, the present invention provides a method for preparing pyromellitic dianhydride, comprising: adopting a vanadium-nitrogen doped carbon catalyst, taking air/oxygen as an oxidant, taking symmetric octahydro anthracene as a raw material, and carrying out catalytic oxidation reaction in an organic solvent to obtain the pyromellitic dianhydride.
According to the present invention, in order to obtain pyromellitic dianhydride with higher conversion and selectivity, the catalyst is used in an amount of 0.5 to 30wt% (for example, a value in a range formed by any two values of 0.5wt%,1wt%,5wt%,10wt%,15wt%,20wt%,25wt%,30wt%, and above) with respect to symmetrical octahydroanthracene, more preferably 1 to 5wt%.
According to the present invention, it is preferable that the organic solvent is used in an amount of 200 to 2000wt% (for example, a value in a range which can be formed by any two values of 200wt%,500wt%,800wt%,1000wt%,1300wt%,1500wt%,1800wt%,2000wt% and above) with respect to the symmetrical octahydroanthracene, and more preferably 500 to 1100wt%.
According to the present invention, it is preferable that the organic solvent is selected from at least one of methanol, acetic acid, methyl acetate, ethyl acetate, methylene chloride, acetonitrile, propionitrile, isobutyronitrile, dimethyl sulfoxide, and acetone, and more preferably at least one of acetic acid and ethyl acetate.
According to the present invention, in order to obtain pyromellitic dianhydride with higher conversion and selectivity, it is preferable that the temperature of the catalytic oxidation reaction is 60 to 180 ℃ (for example, may be 60 ℃,70 ℃,80 ℃,90 ℃,100 ℃,110 ℃,120 ℃,130 ℃,140 ℃,150 ℃,160 ℃,170 ℃,180 ℃ or any two values thereof) and more preferably 100 to 160 ℃.
According to the present invention, in order to obtain pyromellitic dianhydride with higher conversion and selectivity, it is preferable that the time for the catalytic oxidation reaction is 4 to 18 hours (for example, may be a value within a range formed by 4h,5h,6h,7h,8h,9h,10h, 1111h, 12h,13h,14h,15h,18h, and any two of the above values), and more preferably 8 to 15 hours.
According to the present invention, in order to obtain pyromellitic dianhydride with higher conversion and selectivity, it is preferable that the partial pressure of oxygen in the oxidizing agent is 0.01 to 2MPa (for example, values that may be within a range of 0.01mpa,0.1mpa,0.3mpa,0.5mpa,0.8mpa,1mpa,1.3mpa,1.5mpa,1.8mpa,2mpa and any two of the above values), more preferably 0.1 to 1MPa.
According to the present invention, in order to obtain pyromellitic dianhydride with higher conversion and selectivity, it is preferable to supplement oxygen consumed during the reaction. The amount of supplemental oxygen is such that the partial pressure of oxygen is close to the partial pressure of oxygen at the beginning of the reaction. The approach means 0.8 to 1.3 times the partial pressure of oxygen at the beginning of the reaction.
According to the invention, it is preferred to charge the symmetrical octahydro anthracene, the catalyst and the solvent into a high-pressure reactor, then to close the reactor, to charge in oxygen, then to raise the temperature to the reaction temperature with stirring, to pass through the reaction time, and during this time to replenish the oxygen consumed. After the reaction is finished, cooling to room temperature, carefully reducing the pressure to normal pressure, carrying out solid-liquid separation on the reacted materials, and removing the catalyst to obtain the product.
According to the present invention, in order to obtain pyromellitic dianhydride with higher conversion rate and selectivity by using the catalyst, preferably, the preparation method of the vanadyl-nitrogen-doped carbon catalyst comprises: roasting a nitrogen-containing carbon compound and a vanadium-containing compound to obtain the vanadium-nitrogen doped carbon catalyst;
wherein the molar ratio of the nitrogen-containing carbon compound to the vanadium-containing compound is 1:0.25-4.
It can be appreciated that the vanadyl-nitrogen-doped carbon catalyst is in the form of a black solid powder.
According to the present invention, in order to enable the catalyst to obtain pyromellitic dianhydride with higher conversion and selectivity, it is preferable that the nitrogen-containing carbon compound is at least one selected from the group consisting of phenanthroline, chitosan, melamine, urea, 2-picolinic acid, and piperazine.
According to the present invention, in order to enable the catalyst to obtain pyromellitic dianhydride with higher conversion and selectivity, it is preferable that the vanadium-containing compound is at least one selected from the group consisting of ammonium orthovanadate, ammonium metavanadate, sodium metavanadate and vanadium pentoxide.
According to the invention, it is preferred that the grinding is carried out at room temperature. It will be appreciated that the nitrogenous carbon compound and the vanadium containing compound are also mixed during the milling process.
According to the present invention, in order to allow the catalyst to obtain pyromellitic dianhydride with higher conversion and selectivity, it is preferable that the calcination temperature is 500 to 1000 ℃ (for example, may be 500 ℃,550 ℃,600 ℃,650 ℃,700 ℃,750 ℃,800 ℃,850 ℃,900 ℃,950 ℃,1000 ℃ or any two values thereof formed in a range), more preferably 600 to 800 ℃.
According to the present invention, in order to enable the catalyst to obtain pyromellitic dianhydride with higher conversion and selectivity, it is preferable that the calcination time is 0.1 to 20 hours (a value within a range formed by 0.1h,0.5h,1h,2h,3h,4h,5h,7h,10h,13h,15h,18h,20h and any two of the above values), and more preferably 1.5 to 5 hours.
According to the invention, preferably, the calcination is carried out in a nitrogen atmosphere. The nitrogen environment may be atmospheric.
According to the invention, preferably, after the nitrogen-containing compound and the vanadium-containing compound are fully ground and mixed, the materials are loaded into a porcelain boat, then under the protection of normal pressure nitrogen, the temperature is raised to the roasting temperature at the heating rate of 6-15 ℃/min, after the roasting time, the temperature is gradually lowered to the room temperature, and the vanadium-nitrogen-doped carbon catalyst is obtained.
According to a particularly preferred embodiment of the invention, symmetrical octahydroanthracene, a vanadium nitrogen doped carbon catalyst and ethyl acetate are taken and added into a high-pressure reaction kettle, wherein the vanadium nitrogen doped carbon catalyst is used in an amount of 1-1.5wt% and the ethyl acetate is used in an amount of 870-930wt% relative to 1g of the symmetrical octahydroanthracene; after the reaction kettle is closed, 0.1-0.2MPa of oxygen is filled, the temperature is raised to 150-160 ℃ under stirring, the reaction lasts for 11-13h, and the consumed oxygen is supplemented until the oxygen pressure is close to the oxygen partial pressure at the beginning of the reaction. After the reaction is finished, cooling the material to room temperature, carefully reducing the pressure to normal pressure, and filtering the material to obtain the pyromellitic dianhydride.
The present invention will be described in detail below by way of examples.
Preparation example 1
The catalyst provided by the invention and the preparation method thereof
Weighing 10g of melamine and 9.2g of ammonium metavanadate respectively (the molar ratio of melamine to ammonium metavanadate = 1), fully mixing and grinding, loading and feeding by using a porcelain boat, heating to 700 ℃ at a heating rate of 10 ℃/min under the protection of normal-pressure nitrogen, roasting for 3h, and then slowly cooling to room temperature to obtain black solid powder, thus obtaining the vanadium-nitrogen doped carbon material catalyst A, wherein an XRD (X-ray diffraction) diagram of the catalyst A is shown in figure 1.
Preparation example 2
Illustrating the catalyst provided by the invention and the preparation method thereof
Respectively weighing 10g of piperazine and 13.4g of ammonium metavanadate (the molar ratio of piperazine to ammonium metavanadate = 1), fully mixing and grinding, loading and feeding by using a porcelain boat, heating to 600 ℃ at the heating rate of 10 ℃/min under the protection of normal-pressure nitrogen, roasting for 1.5h, and then slowly cooling to room temperature to obtain black solid powder, namely the vanadium-nitrogen doped carbon material catalyst B disclosed by the invention.
Preparation example 3
Illustrating the catalyst provided by the invention and the preparation method thereof
Respectively weighing 10g of phenanthroline and 6.4g of ammonium metavanadate (the mol ratio of phenanthroline to ammonium metavanadate = 1), fully mixing and grinding, loading and feeding by using a porcelain boat, heating to 800 ℃ at a heating rate of 10 ℃/min under the protection of normal-pressure nitrogen, keeping the temperature for 5 hours, and then slowly cooling to room temperature to obtain black solid powder, namely the vanadium-nitrogen doped carbon material catalyst C provided by the invention.
Preparation examples 4 to 9
The catalyst was prepared according to the method of preparation example 1 except that melamine was used in an amount of 10g and ammonium metavanadate was added in accordance with the molar ratio of melamine to ammonium metavanadate shown in Table 1. The resulting catalysts were designated as catalyst D, catalyst E, catalyst F, catalyst G, catalyst H, and catalyst I, respectively.
TABLE 1
| Preparation example | Molar ratio of | Catalyst and process for preparing same |
| Preparation example 4 | Melamine: ammonium metavanadate =1:4 | D |
| Preparation example 5 | Melamine: ammonium metavanadate =1:3 | E |
| Preparation example 6 | Melamine: ammonium metavanadate =1:2 | F |
| Preparation example 7 | Melamine: ammonium metavanadate =1:0.5 | G |
| Preparation example 8 | Melamine: ammonium metavanadate =1:0.33 | H |
| Preparation example 9 | Melamine: ammonium metavanadate =1:0.25 | I |
Preparation examples 10 to 15
Weighing nitrogen-containing carbon compounds and vanadium compounds in different proportions according to the table 2, fully mixing and grinding, loading and feeding by using a porcelain boat, heating to 800 ℃ at the heating rate of 10 ℃/min under the protection of normal-pressure nitrogen, preserving heat for 1.5h, and then slowly cooling to room temperature to obtain the vanadium-nitrogen doped carbon material catalyst, wherein the catalysts prepared in preparation examples 10-15 are respectively marked as catalyst J, catalyst K, catalyst L, catalyst M, catalyst N and catalyst O.
TABLE 2
| Preparation example | Catalyst (molar ratio) | Catalyst and process for preparing same |
| Preparation example 10 | Piperazine: sodium metavanadate =1 | J |
| Preparation example 11 | Phenanthroline: vanadium pentoxide =1 | K |
| Preparation example 12 | Phenanthroline: ammonium orthovanadate =1 | L |
| Preparation example 13 | 2-picolinic acid: ammonium metavanadate =1 | M |
| Preparation example 14 | Urea: vanadium pentoxide =1 | N |
| Preparation example 15 | And (3) chitosan: sodium metavanadate =1 | O |
Example 1
To illustrate the method for preparing pyromellitic dianhydride according to the present invention
Adding 1g of symmetric octahydro anthracene, 0.05g of catalyst A and about 8g of acetonitrile into a 100mL high-pressure reaction kettle, closing the reaction kettle, filling 1.0MPa of oxygen, heating to 130 ℃ under stirring, reacting for 8h, and supplementing consumed oxygen until the oxygen pressure is kept to be about 1.0MPa in the reaction process. After the reaction was complete, the batch was cooled to room temperature and carefully depressurized to normal pressure.
Example 2
To illustrate the method for preparing pyromellitic dianhydride according to the present invention
Adding 1g of symmetric octahydro anthracene, 0.01g of catalyst B and about 9g of ethyl acetate into a 100mL high-pressure reaction kettle, closing the reaction kettle, filling 0.1MPa of oxygen, heating to 160 ℃ under stirring, reacting for 12h, and supplementing consumed oxygen until the oxygen pressure is kept to be about 0.1MPa in the reaction process. After the reaction was complete, the batch was cooled to room temperature and carefully depressurized to normal pressure.
Example 3
Illustrating the method for preparing pyromellitic dianhydride according to the present invention
1g of symmetric octahydro anthracene, 0.04g of catalyst C and about 10.5g of acetic acid are added into a 100mL high-pressure reaction kettle, after the reaction kettle is closed, 0.5MPa of oxygen is filled, the temperature is raised to 100 ℃ under stirring, the reaction is carried out for 15h, and consumed oxygen is supplemented until the oxygen pressure is kept to be about 0.5MPa in the reaction process. After the reaction was complete, the batch was cooled to room temperature and carefully depressurized to normal pressure.
Examples 4 to 9
Pyromellitic dianhydride was prepared according to the method of example 1, except that catalysts D, E, F, G, H and I prepared in preparation examples 4 to 9 were used in examples 4 to 9, respectively.
Examples 10 to 15
Pyromellitic dianhydride was prepared by the following method using the catalyst J, the catalyst K, the catalyst L, the catalyst M, the catalyst N, and the catalyst O of preparation examples 10 to 15, respectively.
1g of symmetric octahydro anthracene, 0.02g of catalyst and about 5.25g of acetic acid are added into a 100mL high-pressure reaction kettle, after the reaction kettle is closed, 0.5MPa of oxygen is filled, the temperature is raised to 140 ℃ under stirring, the reaction is carried out for 10 hours, and consumed oxygen is supplemented until the oxygen pressure is kept to be about 0.5MPa in the reaction process. After the reaction was complete, the batch was cooled to room temperature and carefully depressurized to normal pressure.
Example 16
To illustrate the method for preparing pyromellitic dianhydride according to the present invention
Adding 1g of symmetric octahydro anthracene, 0.005g of catalyst A and about 2g of acetonitrile into a 100mL high-pressure reaction kettle, closing the reaction kettle, filling 0.01MPa of oxygen, heating to 60 ℃ under stirring, reacting for 18h, and supplementing consumed oxygen until the oxygen pressure is kept to be about 0.01MPa in the reaction process. After the reaction was complete, the batch was cooled to room temperature and carefully depressurized to normal pressure.
Example 17
To illustrate the method for preparing pyromellitic dianhydride according to the present invention
Adding 1g of symmetric octahydro anthracene, 0.3g of catalyst A and about 20g of acetonitrile into a 100mL high-pressure reaction kettle, closing the reaction kettle, filling 2MPa of oxygen, heating to 180 ℃ under stirring, reacting for 4 hours, and supplementing consumed oxygen until the oxygen pressure is kept at about 2MPa in the reaction process. After the reaction was complete, the batch was cooled to room temperature and carefully depressurized to normal pressure.
Comparative example 1
Pyromellitic dianhydride was prepared according to the method of example 1 except that the vanadyl-doped carbon catalyst was replaced with the catalyst of example 5 in CN 108640926A.
Test example 1
After the reaction of examples 1 to 17 and comparative example 1 was completed, the catalyst was filtered, and then the sample was taken out, and quantitative analysis of the product was carried out by liquid chromatography, thereby obtaining the conversion of symmetrical octahydro anthracene and the selectivity of pyromellitic dianhydride. The results are shown in Table 3.
TABLE 3
It can be seen from the results in table 1 that examples 1 to 17, which employ the solution according to the invention, have significantly better conversions and selectivities, with the conversions and selectivities of examples 1 to 15 being better. The conversion and selectivity of comparative example 1 were less effective.
In addition, the method provides a new synthesis route of the pyromellitic dianhydride, and can prepare the pyromellitic dianhydride in a liquid phase, the temperature of the catalytic oxidation reaction is 60-180 ℃, compared with the prior art, the method has the advantages of mild reaction conditions, low cost, greenness, environmental protection and relatively short process route. In addition, the invention can obtain higher conversion rate and selectivity under milder reaction conditions.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. A method for preparing pyromellitic dianhydride, comprising: adopting a vanadium-nitrogen doped carbon catalyst, taking air/oxygen as an oxidant, taking symmetric octahydro anthracene as a raw material, and carrying out catalytic oxidation reaction in an organic solvent to obtain the pyromellitic dianhydride.
2. The method according to claim 1, wherein the vanadyl-nitrogen-doped-carbon catalyst is used in an amount of 0.5-30 wt.%, preferably 1-5 wt.%, relative to the symmetric octahydroanthracene.
3. The process according to claim 1 or 2, wherein the organic solvent is used in an amount of 200 to 2000 wt.%, preferably 500 to 1100 wt.%, relative to the symmetric octahydroanthracene;
preferably, the organic solvent is selected from at least one of methanol, acetic acid, methyl acetate, ethyl acetate, dichloromethane, acetonitrile, propionitrile, isobutyronitrile, dimethyl sulfoxide, and acetone.
4. A process according to any one of claims 1 to 3, wherein the temperature of the catalytic oxidation reaction is in the range of 60 to 180 ℃, preferably 100 to 160 ℃.
5. The process according to any one of claims 1 to 4, wherein the catalytic oxidation reaction is carried out for a period of 4 to 18 hours, preferably 8 to 15 hours.
6. A process according to any one of claims 1 to 5, wherein the partial pressure of oxygen in the oxidant is in the range of from 0.01 to 2MPa, preferably from 0.1 to 1MPa.
7. The method of any of claims 1-6, wherein the method of preparing the vanadyl-doped carbon catalyst comprises: roasting a nitrogen-containing carbon compound and a vanadium-containing compound to obtain the vanadium-nitrogen doped carbon catalyst;
wherein the molar ratio of the nitrogen-containing carbon compound to the vanadium-containing compound is 1:0.25-4.
8. The method according to claim 7, wherein the nitrogen-containing carbon compound is selected from at least one of phenanthroline, chitosan, melamine, urea, 2-picolinic acid, and piperazine.
9. The method according to claim 7 or 8, wherein the vanadium-containing compound is selected from at least one of ammonium orthovanadate, ammonium metavanadate, sodium metavanadate and vanadium pentoxide.
10. A process according to any one of claims 7 to 9, wherein the firing temperature is 500 to 1000 ℃, preferably 600 to 800 ℃;
preferably, the roasting time is 0.1-20h, more preferably 1.5-5h.
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| US3925425A (en) * | 1973-05-04 | 1975-12-09 | Labofina Sa | Process for producing anhydrides of aromatic polycarboxylic acids |
| CN108640926A (en) * | 2018-04-16 | 2018-10-12 | 大连理工大学 | A kind of method of industry anthracene selection hydro-oxidation coupling producing pyromellitic dianhydride |
| CN109503524A (en) * | 2019-01-03 | 2019-03-22 | 大连理工大学 | A kind of method that catalysis oxidation cyclic alkanol/cyclanone prepares lactone |
| CN110183327A (en) * | 2019-06-14 | 2019-08-30 | 大连理工大学 | A kind of method that catalysis oxidation hydroxy ester prepares keto ester |
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2021
- 2021-08-24 CN CN202110973827.0A patent/CN115925716A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3925425A (en) * | 1973-05-04 | 1975-12-09 | Labofina Sa | Process for producing anhydrides of aromatic polycarboxylic acids |
| CN108640926A (en) * | 2018-04-16 | 2018-10-12 | 大连理工大学 | A kind of method of industry anthracene selection hydro-oxidation coupling producing pyromellitic dianhydride |
| CN109503524A (en) * | 2019-01-03 | 2019-03-22 | 大连理工大学 | A kind of method that catalysis oxidation cyclic alkanol/cyclanone prepares lactone |
| CN110183327A (en) * | 2019-06-14 | 2019-08-30 | 大连理工大学 | A kind of method that catalysis oxidation hydroxy ester prepares keto ester |
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