CN113600189A - Hydroxymethyl furfural catalyst, preparation method and application thereof - Google Patents
Hydroxymethyl furfural catalyst, preparation method and application thereof Download PDFInfo
- Publication number
- CN113600189A CN113600189A CN202110972133.5A CN202110972133A CN113600189A CN 113600189 A CN113600189 A CN 113600189A CN 202110972133 A CN202110972133 A CN 202110972133A CN 113600189 A CN113600189 A CN 113600189A
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- China
- Prior art keywords
- catalyst
- hydroxymethylfurfural
- product
- acid
- hours
- Prior art date
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- 239000003054 catalyst Substances 0.000 title claims abstract description 96
- NOEGNKMFWQHSLB-UHFFFAOYSA-N 5-hydroxymethylfurfural Chemical compound OCC1=CC=C(C=O)O1 NOEGNKMFWQHSLB-UHFFFAOYSA-N 0.000 title claims abstract description 70
- RJGBSYZFOCAGQY-UHFFFAOYSA-N hydroxymethylfurfural Natural products COC1=CC=C(C=O)O1 RJGBSYZFOCAGQY-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 72
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 36
- 239000000047 product Substances 0.000 claims abstract description 36
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000005715 Fructose Substances 0.000 claims abstract description 23
- 229930091371 Fructose Natural products 0.000 claims abstract description 23
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 claims abstract description 23
- 239000007787 solid Substances 0.000 claims abstract description 19
- 239000002904 solvent Substances 0.000 claims abstract description 17
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- 238000001035 drying Methods 0.000 claims description 19
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- DHRLEVQXOMLTIM-UHFFFAOYSA-N phosphoric acid;trioxomolybdenum Chemical compound O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.OP(O)(O)=O DHRLEVQXOMLTIM-UHFFFAOYSA-N 0.000 claims description 8
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- IYDGMDWEHDFVQI-UHFFFAOYSA-N phosphoric acid;trioxotungsten Chemical compound O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.OP(O)(O)=O IYDGMDWEHDFVQI-UHFFFAOYSA-N 0.000 claims description 7
- CGFYHILWFSGVJS-UHFFFAOYSA-N silicic acid;trioxotungsten Chemical compound O[Si](O)(O)O.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 CGFYHILWFSGVJS-UHFFFAOYSA-N 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- 238000004821 distillation Methods 0.000 claims description 6
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 4
- 238000009835 boiling Methods 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 2
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- 229930006000 Sucrose Natural products 0.000 claims description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims description 2
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- 229940029339 inulin Drugs 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 239000005720 sucrose Substances 0.000 claims description 2
- 150000008163 sugars Chemical class 0.000 claims 1
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- 238000011069 regeneration method Methods 0.000 abstract description 2
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- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
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- 238000004811 liquid chromatography Methods 0.000 description 5
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
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- GSNUFIFRDBKVIE-UHFFFAOYSA-N 2,5-dimethylfuran Chemical compound CC1=CC=C(C)O1 GSNUFIFRDBKVIE-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000002638 heterogeneous catalyst Substances 0.000 description 3
- 239000002815 homogeneous catalyst Substances 0.000 description 3
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- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 125000003172 aldehyde group Chemical group 0.000 description 2
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- CHTHALBTIRVDBM-UHFFFAOYSA-N furan-2,5-dicarboxylic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)O1 CHTHALBTIRVDBM-UHFFFAOYSA-N 0.000 description 2
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- PCSKKIUURRTAEM-UHFFFAOYSA-N 5-hydroxymethyl-2-furoic acid Chemical compound OCC1=CC=C(C(O)=O)O1 PCSKKIUURRTAEM-UHFFFAOYSA-N 0.000 description 1
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- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
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- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
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- Furan Compounds (AREA)
Abstract
The invention provides a hydroxymethyl furfural catalyst, a preparation method and application thereof. The hydroxymethylfurfural catalyst comprises a porous material foamed nickel carrier and a catalyst active component loaded on the carrier by an impregnation method. The invention also discloses the application of the hydroxymethylfurfural catalyst in the field of HMF production, biomass sugar is placed in a low-boiling-point solvent and stirred until fructose is completely dissolved, the mixed solution is introduced into a tubular reactor with the hydroxymethylfurfural catalyst inside, the product is placed in a closed round-bottom flask after flowing out, the solvent is distilled under reduced pressure for recovery after the product completely flows out, a yellow solid crude product is obtained at the same time, the solid crude product is placed in dichloromethane and extracted under the ultrasonic condition, the solid crude product is filtered, and the filtrate is distilled under reduced pressure to obtain the hydroxymethylfurfural. The hydroxymethyl furfural catalyst can realize continuous production of HMF, and has the advantages of simple production process, less three-waste discharge, simple product separation, easy preparation, recovery and regeneration of the catalyst and high fructose conversion rate.
Description
Technical Field
The invention relates to a catalyst technology, in particular to a hydroxymethyl furfural catalyst, a preparation method and application thereof.
Background
With the continuous reduction of fossil fuel storage and the increasing of environmental pollution problems, the development of renewable resources becomes a key point of attention of all countries. Among various renewable resources, biomass resources have been receiving attention of researchers due to the characteristics of high stability, wide sources, renewability, and the like, and meanwhile, the preparation of energy and chemicals by using biomass as a raw material is an important direction in the development of the current society, so that biomass resources become energy sources which are most likely to replace fossil fuels. 5-hydroxymethylfurfural (5-HMF) is a high value-added platform compound which can be obtained by dehydrating biomass hexose under an acidic condition, and as the HMF molecular structure contains active aldehyde groups and hydroxyl groups, a plurality of important compounds such as 2, 5-dimethylfuran, 5-hydroxymethylfuroic acid, 2, 5-furandicarboxaldehyde, 2, 5-furandicarboxylic acid and the like are prepared by chemical reactions such as hydrolysis, oxidative dehydrogenation, polymerization, hydrogenation and the like. HMF is considered by researchers to be a key bridge compound between bio-based sugar chemistry and petroleum-based chemistry, and therefore, the production of HMF from biomass is a key element of current research.
The solvents currently used in the research of preparing HMF by six-carbon sugar conversion mainly include a single-phase system and a two-phase system. Water is the most common solvent in single phase systems, but due to its strong polarity, HMF is produced in low yields in water and readily reacts with water to form other byproducts. Therefore, an organic solvent-water co-dissolving system is often used to suppress the occurrence of side reactions. The organic solvent is often selected to be Tetrahydrofuran (THF) which has a higher extraction capacity, thereby allowing for faster and greater transfer of HMF from the aqueous phase to the organic phase. The THF not only acts as an extractant, but also promotes hydration, degradation, and polycondensation side reactions of HMF. The choice of catalyst is also one of the most important influencing factors in HMF production technology, which is mainly divided into homogeneous catalysts and heterogeneous catalysts. Heterogeneous catalysts have the advantages of low corrosivity, strong thermal stability, easy separation, and the like, and thus have become a hot point of research in recent years. Commonly used heterogeneous catalysts include protonated zeolites, transition metal oxides, carbon-based catalysts, and the like. The composite metal oxide catalyst can strengthen the surface acidity of the metal oxide, and improve the conversion rate of reactants and the yield of HMF. Phosphorylated metal oxides are well known for their excellent acid strength and are suitable for a variety of acid-catalyzed reactions.
The six-carbon monosaccharide mainly containing fructose is considered to be the most ideal and optimal raw material for preparing 5-HMF by dehydration, but fructose molecules contain a plurality of active groups (such as carbonyl, reducing aldehyde groups or ketone groups), and the groups are easy to generate side reactions under acidic conditions, so that the yield and the selectivity of the 5-HMF prepared by fructose dehydration are reduced, and therefore, the selection of a proper catalyst system is favorable for improving the yield and the selectivity of the 5-HMF prepared by fructose dehydration. Research shows that factors influencing the preparation of 5-HMF by fructose dehydration include reaction temperature, reaction time, reactant concentration, catalyst type and the like, and the catalyst type has the most obvious effect. The traditional homogeneous catalysts such as Lewis acid, metal salts, metal oxides and the like have better catalytic effect, but have the defects of difficult separation of products, difficult recovery of the catalyst, poor stability, high requirement on the corrosion resistance of equipment, easy environmental pollution caused by emissions and the like.
Disclosure of Invention
The invention aims to provide a hydroxymethylfurfural catalyst which can realize continuous production of HMF, has a simple production process, less three-waste emission and simple product separation, is easy to prepare, recover and regenerate and has high fructose conversion rate, aiming at the problems of difficult product separation, difficult catalyst recovery, poor stability, high requirement on the corrosion resistance of equipment and easy environmental pollution caused by emission existing in the traditional homogeneous catalyst.
In order to achieve the purpose, the invention adopts the technical scheme that: the hydroxymethyl furfural catalyst comprises a porous material foam nickel carrier and a catalyst active component loaded on the carrier by an impregnation method.
Further, the catalyst active component comprises one or more of phosphotungstic acid solution, phosphomolybdic acid, silicotungstic acid, sulfuric acid and phosphoric acid.
Further, the thickness of the foamed nickel is 1-15mm, preferably 5-10 mm.
Further, the loading amount is 0.5-2mg/cm-2Preferably 1.12mg/cm-2。
The invention also discloses a preparation method of the hydroxymethylfurfural catalyst, which comprises the following steps:
step 1, putting the foamed nickel into a stannous sulfate solution of 0.1-0.5mol/L, dipping for 12-24 hours, and taking out;
step 2, drying the impregnated foam nickel at 100-200 ℃ for 12-24 hours, and taking out the foam nickel to obtain a catalyst carrier after the quality is unchanged;
and 3, placing the catalyst carrier in 0.01-0.5mol/L acid solution for soaking for 12-36 hours, wherein the acid solution is one or a mixture of phosphotungstic acid solution, phosphomolybdic acid solution and silicotungstic acid solution, then placing the mixture at the temperature of 100-800 ℃ for drying, and then placing the dried catalyst at the temperature of 300-800 ℃ for roasting for 3-15 hours to obtain the catalyst with the L acid and B acid dual-functional acid sites.
Further, step 1, putting the nickel foam into a stannous sulfate solution of 0.1-0.3mol/L, dipping for 16-20 hours, and taking out.
Further, step 2, drying the impregnated nickel foam at the temperature of 105-150 ℃ for 12-18 hours, and taking out the nickel foam after the quality is not changed to obtain the catalyst carrier.
Further, step 3, the catalyst carrier is placed in 0.02-0.2mol/L acid solution for immersion for 12-24 hours, the acid solution is one or a mixture of phosphotungstic acid solution, phosphomolybdic acid solution and silicotungstic acid solution, then the catalyst carrier is placed at the temperature of 110-.
Further, before the step 1, the foamed nickel is placed in 0.1-1mol/L hydrochloric acid solution to be cleaned for 0.5-10 hours under ultrasonic, then is cleaned for 3-5 times by distilled water, is cleaned for 1-3 times by ethanol, and is dried at the temperature of 50-110 ℃.
The invention also discloses the application of the hydroxymethylfurfural catalyst in the field of HMF production.
The application of the hydroxymethylfurfural catalyst in the field of HMF production comprises the following steps: placing biomass sugar in a low-boiling-point solvent with the boiling point lower than 130 ℃ and stirring until fructose is completely dissolved, introducing the mixed solution into a tubular reactor with a built-in hydroxymethylfurfural catalyst at the flow rate of 0.1-3mL/min, reacting at 60-180 ℃ for 1-3h, placing the product in a closed round-bottom flask after the product flows out, distilling the solvent at 30-100 ℃ under reduced pressure for recycling after the product flows out completely, obtaining a yellow solid crude product at the same time, placing the solid crude product in dichloromethane, extracting for 20-60min under an ultrasonic condition, filtering, distilling the filtrate at 30-100 ℃ under reduced pressure, and finally obtaining a refined product, namely hydroxymethylfurfural.
Further, the biomass sugar is one or a mixture of fructose, glucose, sucrose and inulin.
Further, the low-boiling point solvent is one or a mixture of methanol, ethanol, isopropanol, diethyl ether, ethylene glycol dimethyl ether, N-dimethylformamide, acetone and chloroform. Methanol is preferred.
Further, the content of the biomass sugar in the mixed solution is 8-15% wt, preferably 10% wt.
Further, the content of the hydroxymethylfurfural catalyst in the mixed liquid is 0.5-3 wt%, and preferably 1 wt%.
Further, the dosage ratio of the solid crude product to the methanol is 1:5-20, preferably 1: 10.
The invention also discloses an application of the hydroxymethylfurfural catalyst in the field of hydroxymethylfurfural preparation.
The invention discloses a hydroxymethyl furfural catalyst, a preparation method and an application thereof, and compared with the prior art, the hydroxymethyl furfural catalyst has the following advantages:
the method can realize continuous production of HMF, has simple process, less discharge of three wastes, simple product separation, easy preparation, recovery and regeneration of the catalyst, high fructose conversion rate of more than 98 percent, refined product purity of more than 95 percent and yield of about 80 percent of different solvents.
The invention optimizes and improves the prior production process from the aspects of reaction process, catalyst preparation, solvent selection and the like, so as to solve the defects of difficult product separation, difficult catalyst recovery, high requirement on the corrosion resistance of equipment, easy environmental pollution caused by emissions and the like in the prior process.
Drawings
FIG. 1 is a flow chart of a process for preparing hydroxymethylfurfural;
FIG. 2 is an infrared spectrum of pyridine of example 1.
Detailed Description
The invention is further illustrated by the following examples:
example 1
The embodiment discloses a preparation method of a hydroxymethylfurfural catalyst, which comprises the following steps:
taking a plurality of foam nickel with the thickness of 1-15mm, putting the foam nickel into 0.1-1mol/L hydrochloric acid solution, cleaning for 0.5-10 hours under ultrasonic, cleaning for 3-5 times by using distilled water, cleaning for 1-3 times by using ethanol, and drying at the temperature of 50-110 ℃. Placing the dried foamed nickel in a stannous sulfate solution of 0.1-0.5mol/L, dipping for 12-24 hours, then taking out, placing the dipped foamed nickel in a phosphotungstic acid solution of 100-0.5 mol/L, drying for 12-24 hours, taking out after the quality is not changed to obtain a catalyst carrier, placing the catalyst carrier in a phosphotungstic acid solution of 0.01-0.5mol/L, dipping for 12-36 hours, then placing the catalyst carrier at 110 ℃ for drying, and then placing the dried catalyst at 800 ℃ for roasting for 3-15 hours to obtain the catalyst simultaneously having the L acid and B acid dual-function acid sites. Example 1 the infrared spectrum of pyridine is shown in figure 1.
The step of preparing hydroxymethylfurfural by using the catalyst is shown in figure 1, and specifically comprises the following steps:
putting 1g of fructose into 100mL of methanol solution, stirring until the fructose is completely dissolved, introducing the mixed solution into a tubular reactor with a built-in catalyst at the flow rate of 0.1mL/min, reacting at 150 ℃, putting the product into a closed round-bottom flask after flowing out, recovering the solvent by reduced pressure distillation at 40 ℃ after the product completely flows out, simultaneously obtaining a yellow solid crude product, putting the solid into 100mL of dichloromethane, extracting for 30min under the ultrasonic condition, filtering, distilling the filtrate at 40 ℃ under reduced pressure, finally obtaining a refined product, and detecting the product by liquid chromatography, wherein the purity is 97%, and the yield is 80%.
Example 2
The embodiment discloses a preparation method of a hydroxymethylfurfural catalyst, which comprises the following steps:
taking a plurality of foam nickel with the thickness of 1-15mm, putting the foam nickel into 0.1-1mol/L hydrochloric acid solution, cleaning for 0.5-10 hours under ultrasonic, cleaning for 3-5 times by using distilled water, cleaning for 1-3 times by using ethanol, and drying at the temperature of 50-110 ℃. Placing the dried foamed nickel in a stannous sulfate solution of 0.1-0.5mol/L, dipping for 12-24 hours, then taking out, placing the dipped foamed nickel in a phosphomolybdic acid solution of 100-0.5 mol/L, drying for 12-24 hours, taking out after the quality is not changed to obtain a catalyst carrier, placing the catalyst carrier in a phosphomolybdic acid solution of 0.01-0.5mol/L, dipping for 12-36 hours, then placing the phosphomolybdic acid solution at 110 ℃ for drying, and then placing the dried catalyst at 800 ℃ for roasting for 3-15 hours to obtain the catalyst with the L acid and B acid dual-function acid sites.
The step of preparing hydroxymethylfurfural by using the catalyst is shown in figure 1, and specifically comprises the following steps:
putting 1g of fructose into 100mL of ethanol solution, stirring until the fructose is completely dissolved, introducing the mixed solution into a tubular reactor with a built-in catalyst at the flow rate of 0.1mL/min, reacting at 150 ℃, putting the product into a closed round-bottom flask after flowing out, recovering the solvent by reduced pressure distillation at 40 ℃ after the product completely flows out, simultaneously obtaining a yellow solid crude product, putting the solid into 100mL of dichloromethane, extracting for 30min under the ultrasonic condition, filtering, distilling the filtrate at 40 ℃ under reduced pressure, finally obtaining a refined product, and detecting the product by liquid chromatography, wherein the purity is 96% and the yield is 79%.
Example 3
The embodiment discloses a preparation method of a hydroxymethylfurfural catalyst, which comprises the following steps:
taking a plurality of foam nickel with the thickness of 1-15mm, putting the foam nickel into 0.1-1mol/L hydrochloric acid solution, cleaning for 0.5-10 hours under ultrasonic, cleaning for 3-5 times by using distilled water, cleaning for 1-3 times by using ethanol, and drying at the temperature of 50-110 ℃. Placing the dried foamed nickel in a stannous sulfate solution of 0.1-0.5mol/L, dipping for 12-24 hours, then taking out, placing the dipped foamed nickel in a silicotungstic acid solution of 100-0.5 mol/L, drying for 12-24 hours, taking out after the quality is not changed to obtain a catalyst carrier, placing the catalyst carrier in a silicotungstic acid solution of 0.01-0.5mol/L, dipping for 12-36 hours, then placing the catalyst carrier at 110 ℃ for drying, and then placing the dried catalyst at 800 ℃ for roasting for 3-15 hours to obtain the catalyst simultaneously having the L acid and B acid dual-function acid sites.
The step of preparing hydroxymethylfurfural by using the catalyst is shown in figure 1, and specifically comprises the following steps:
putting 1g of fructose into 100mL of acetone solution, stirring until the fructose is completely dissolved, introducing the mixed solution into a tubular reactor with a built-in catalyst at the flow rate of 0.1mL/min, reacting at 150 ℃, putting the product into a closed round-bottom flask after flowing out, recovering the solvent by reduced pressure distillation at 40 ℃ after the product completely flows out, simultaneously obtaining a yellow solid crude product, putting the solid into 100mL of dichloromethane, extracting for 30min under the ultrasonic condition, filtering, distilling the filtrate at 40 ℃ under reduced pressure, finally obtaining a refined product, and detecting the product by liquid chromatography, wherein the purity is 96% and the yield is 83%.
Example 4
The embodiment discloses a preparation method of a hydroxymethylfurfural catalyst, which comprises the following steps:
taking a plurality of foam nickel with the thickness of 1-15mm, putting the foam nickel into 0.1-1mol/L hydrochloric acid solution, cleaning for 0.5-10 hours under ultrasonic, cleaning for 3-5 times by using distilled water, cleaning for 1-3 times by using ethanol, and drying at the temperature of 50-110 ℃. Placing the dried foamed nickel in a stannous sulfate solution of 0.1-0.5mol/L, dipping for 12-24 hours, then taking out, placing the dipped foamed nickel in a sulfuric acid solution of 100-0.5 mol/L, drying for 12-24 hours at 200 ℃, taking out after the quality is not changed to obtain a catalyst carrier, placing the catalyst carrier in a sulfuric acid solution of 0.01-0.5mol/L, dipping for 12-36 hours, then placing the catalyst carrier at 110 ℃ for drying, and then placing the dried catalyst at 800 ℃ for roasting for 3-15 hours to obtain the catalyst simultaneously having the L acid and B acid dual-function acid sites.
The step of preparing hydroxymethylfurfural by using the catalyst is shown in figure 1, and specifically comprises the following steps:
putting 1g of fructose into a 100mL DMF solution, stirring until the fructose is completely dissolved, introducing the mixed solution into a tubular reactor with a built-in catalyst at the flow rate of 0.1mL/min, reacting at 150 ℃, putting the product into a closed round-bottom flask after flowing out, distilling the solvent under reduced pressure at 60 ℃ for recycling after the product completely flows out, simultaneously obtaining a yellow solid crude product, putting the solid into 100mL dichloromethane, extracting for 30min under the ultrasonic condition, filtering, distilling the filtrate under reduced pressure at 40 ℃, finally obtaining a refined product, and detecting the product by liquid chromatography, wherein the purity is 97%, and the yield is 86%.
Example 5
The embodiment discloses a preparation method of a hydroxymethylfurfural catalyst, which comprises the following steps:
taking a plurality of foam nickel with the thickness of 1-15mm, putting the foam nickel into 0.1-1mol/L hydrochloric acid solution, cleaning for 0.5-10 hours under ultrasonic, cleaning for 3-5 times by using distilled water, cleaning for 1-3 times by using ethanol, and drying at the temperature of 50-110 ℃. Placing the dried foamed nickel in a stannous sulfate solution of 0.1-0.5mol/L, dipping for 12-24 hours, then taking out, placing the dipped foamed nickel in a phosphoric acid solution of 0.01-0.5mol/L, dipping for 12-36 hours, then placing the catalyst at 110 ℃ and drying, then placing the dried catalyst at 800 ℃ and calcining for 3-15 hours to obtain the catalyst with the L acid and B acid dual-function acid sites.
The step of preparing hydroxymethylfurfural by using the catalyst is shown in figure 1, and specifically comprises the following steps: putting 1g of fructose into 100mL of glycol dimethyl ether solution, stirring until the fructose is completely dissolved, introducing the mixed solution into a tubular reactor with a built-in catalyst at the flow rate of 0.1mL/min, reacting at 150 ℃, putting the product into a closed round-bottom flask after flowing out, recovering the solvent by reduced pressure distillation at 60 ℃ after the product completely flows out, simultaneously obtaining a yellow solid crude product, putting the solid into 100mL of dichloromethane, extracting for 30min under the ultrasonic condition, filtering, distilling the filtrate at 40 ℃ under reduced pressure, finally obtaining a refined product, and detecting the product by liquid chromatography, wherein the purity is 94% and the yield is 88%.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The hydroxymethylfurfural catalyst is characterized by comprising a porous material foamed nickel carrier and a catalyst active component loaded on the carrier by an impregnation method.
2. The hydroxymethylfurfural catalyst according to claim 1, wherein the catalyst active component comprises a mixture of one or more of phosphotungstic acid solution, phosphomolybdic acid, silicotungstic acid, sulfuric acid, phosphoric acid.
3. The hydroxymethylfurfural catalyst according to claim 1 wherein the nickel foam has a thickness of 1 to 15 mm.
4. According toThe hydroxymethylfurfural catalyst of claim 1, wherein the loading is 0.5 to 2mg/cm-2。
5. The preparation method of the hydroxymethylfurfural catalyst is characterized by comprising the following steps of: step 1, putting the foamed nickel into a stannous sulfate solution of 0.1-0.5mol/L, dipping for 12-24 hours, and taking out;
step 2, drying the impregnated foam nickel at 100-200 ℃ for 12-24 hours, and taking out the foam nickel to obtain a catalyst carrier after the quality is unchanged;
and 3, placing the catalyst carrier in 0.01-0.5mol/L acid solution for soaking for 12-36 hours, wherein the acid solution is one or a mixture of phosphotungstic acid solution, phosphomolybdic acid solution and silicotungstic acid solution, then placing the mixture at the temperature of 100-800 ℃ for drying, and then placing the dried catalyst at the temperature of 300-800 ℃ for roasting for 3-15 hours to obtain the catalyst with the L acid and B acid dual-functional acid sites.
6. The method for preparing hydroxymethylfurfural catalyst according to claim 5, wherein before the step 1, the nickel foam is placed in 0.1-1mol/L hydrochloric acid solution and cleaned under ultrasound for 0.5-10 hours, and then cleaned with distilled water for 3-5 times, cleaned with ethanol for 1-3 times, and dried at 50-110 ℃.
7. Use of the hydroxymethylfurfural catalyst according to any one of claims 1 to 4 in the field of HMF production.
8. The application of the hydroxymethylfurfural catalyst in the field of HMF production according to claim 7 is characterized in that biomass sugar is placed in a low-boiling-point solvent with the boiling point lower than 130 ℃ and stirred until fructose is completely dissolved, the mixed solution is introduced into a tubular reactor with the hydroxymethylfurfural catalyst inside at the flow rate of 0.1-3mL/min and reacts at 60-180 ℃ for 1-3h, the product is placed in a closed round-bottom flask after flowing out, the solvent is recovered by reduced pressure distillation at 30-100 ℃ after all the product flows out, a yellow solid crude product is obtained at the same time, the solid crude product is placed in dichloromethane and extracted under the ultrasonic condition for 20-60min and then filtered, the filtrate is subjected to reduced pressure distillation at 30-100 ℃, and finally the refined product, namely hydroxymethylfurfural, is obtained.
9. Use of the hydroxymethylfurfural catalyst in the field of HMF production according to claim 8, wherein the biomass sugar is one or a mixture of fructose, glucose, sucrose and inulin; the low boiling point solvent is one or a mixture of methanol, ethanol, isopropanol, diethyl ether, ethylene glycol dimethyl ether, N-dimethylformamide, acetone and chloroform.
10. Use of the hydroxymethylfurfural catalyst in the field of HMF production according to claim 8, characterized in that the content of biomass sugars in the mixed liquor is 8-15% wt; the content of the hydroxymethylfurfural catalyst in the mixed liquid is 0.5-3 wt%; the dosage ratio of the solid crude product to the methanol is 1: 5-20.
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| CN105797711A (en) * | 2016-04-07 | 2016-07-27 | 青岛大学 | Preparation method of catalyst for catalyzing glucose to generate 5-hydroxymethylfurfural through dehydration process |
| CN111617771A (en) * | 2020-05-20 | 2020-09-04 | 东南大学 | Preparation method of composite metal material catalyst and application of composite metal material catalyst in preparation of 5-HMF |
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|---|---|---|---|---|
| CN105797711A (en) * | 2016-04-07 | 2016-07-27 | 青岛大学 | Preparation method of catalyst for catalyzing glucose to generate 5-hydroxymethylfurfural through dehydration process |
| CN111617771A (en) * | 2020-05-20 | 2020-09-04 | 东南大学 | Preparation method of composite metal material catalyst and application of composite metal material catalyst in preparation of 5-HMF |
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Application publication date: 20211105 |