WO2012038969A1 - Procédé de conversion de fructose en 5-hydroxyméthylfurfural à l'aide d'un catalyseur de silice mésoporeuse imprégné avec des métaux de terres rares - Google Patents
Procédé de conversion de fructose en 5-hydroxyméthylfurfural à l'aide d'un catalyseur de silice mésoporeuse imprégné avec des métaux de terres rares Download PDFInfo
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- WO2012038969A1 WO2012038969A1 PCT/IN2011/000048 IN2011000048W WO2012038969A1 WO 2012038969 A1 WO2012038969 A1 WO 2012038969A1 IN 2011000048 W IN2011000048 W IN 2011000048W WO 2012038969 A1 WO2012038969 A1 WO 2012038969A1
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- fructose
- hydroxymethylfurfural
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/1616—Coordination complexes, e.g. organometallic complexes, immobilised on an inorganic support, e.g. ship-in-a-bottle type catalysts
- B01J31/1625—Coordination complexes, e.g. organometallic complexes, immobilised on an inorganic support, e.g. ship-in-a-bottle type catalysts immobilised by covalent linkages, i.e. pendant complexes with optional linking groups
- B01J31/1633—Coordination complexes, e.g. organometallic complexes, immobilised on an inorganic support, e.g. ship-in-a-bottle type catalysts immobilised by covalent linkages, i.e. pendant complexes with optional linking groups covalent linkages via silicon containing groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/03—Catalysts comprising molecular sieves not having base-exchange properties
- B01J29/0308—Mesoporous materials not having base exchange properties, e.g. Si-MCM-41
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/22—Organic complexes
- B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
- B01J31/2208—Oxygen, e.g. acetylacetonates
- B01J31/2226—Anionic ligands, i.e. the overall ligand carries at least one formal negative charge
- B01J31/2252—Sulfonate ligands
- B01J31/2256—Sulfonate ligands being perfluorinated, i.e. comprising at least one perfluorinated moiety as substructure in case of polyfunctional ligands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/22—Organic complexes
- B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
- B01J31/226—Sulfur, e.g. thiocarbamates
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- 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
- C07D307/38—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 with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D307/40—Radicals substituted by oxygen atoms
- C07D307/42—Singly bound oxygen atoms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/30—Complexes comprising metals of Group III (IIIA or IIIB) as the central metal
- B01J2531/37—Lanthanum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/30—Complexes comprising metals of Group III (IIIA or IIIB) as the central metal
- B01J2531/38—Lanthanides other than lanthanum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0215—Sulfur-containing compounds
- B01J31/0225—Sulfur-containing compounds comprising sulfonic acid groups or the corresponding salts
- B01J31/0227—Sulfur-containing compounds comprising sulfonic acid groups or the corresponding salts being perfluorinated, i.e. comprising at least one perfluorinated moiety as substructure in case of polyfunctional compounds
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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
Definitions
- This invention related to method of producing 5-ydroxymethylfurfural (HMF) from fructose by using heterogeneous solid acid catalyst ICaT-2 without giving any considerable byproduct.
- This process is very economical as it involved high yield and simple separation process for the product.
- the use of the green solvents and heterogeneous ICaT-2 catalyst makes this process clean and sustainable. All the operations are carried out in batch reactor. The process is tolerance towards high fructose loading.
- the catalyst found to be very active without any substantial deactivation.
- the simplification in work-up, separation of product and very good recyclability of the catalyst make the process cost-effective and efficient. Isolation procedure for 5- hydroxymethyl furfural is also discussed.
- HMF 5-hydroxymethylfurfural
- renewable resources act as platform chemical because of the wide range of the chemical intermediates and end products is produced from these compounds which used in the polymer industry, fuel and pharmaceutical industries.
- HMF possesses a high potential industrial demand, and is reviewed as a sleeping giant to produce intermediate chemical from bio based renewable resources.
- HMF is versatile chemical compound; however, no technical process has been constructed through sugar route till now. The reasons are low selectivity to HMF, requirement of strong acids, which requires neutralization and lead to large amount of acid waste.
- the high boiling polar solvents like dimethylsulfoxide, dimethylformamide, acetonitrile, poly(glycol ether) etc. give good selectivity to HMF but makes separation process most expensive.
- WO 012445A1 disclose a method of producing HMF by mixing or agitating an aqueous solution of fructose and inorganic acid catalyst with water immiscible organic solvent to form an emulsion. The mixture is heated to 240 °C to 270 °C in a flow reactor at high pressure and then separated into aqueous and organic phase to obtain HMF.
- US 313889A1 disclose the process for making hydroxymethylfurfural from saccharide. A metal complex of an N-heterocyclic carbine and ionic liquid is used. Reaction mixture contains solvent immiscible with ionic liquid to extract 5-hydroxymethylfurfural from ionic liquid.
- US 156841 Al disclose a method of producing substantially pure HMF, HMF esters and other derivatives from carbohydrate source.
- Carbohydrate solution containing organic acid is heated and continuously flowed through a solid phase catalyst to form HMF or/and HMF ester.
- US 033188A1 disclose the process for converting sugars to furan derivatives by using a biphasic reactor containing reactive aqueous phase and an organic extracting phase.
- the aqueous reaction solution contains an acid catalyst.
- Both aqueous solution and organic extraction solution contain at least one modifier such as dimethylsulfoxide, dimethylformamide, N-methylpyrrolidinone, acetonitrile, butyrolactone, dioxane and pyrrolidinone.
- US 033187A1 disclose the process for converting carbohydrate to 5- hydroxymethylfurfural in the presence of metal halide and acid catalyst. In this process ionic liquids are used as solvent to dissolve carbohydrates.
- US 142599A1 disclose the process for preparation and purification of 5- hydroxymethyfurfural. In this process high fructose corn syrup is used as convenient fructose source and 5-hydroxymethylfurfural is prepared by using ion exchange resin in presence of 1 -methyl-2-pyrrolidinone, dimethylacetamide, dimethylformamide and combinations.
- US 4590283A disclose the process for manufacturing 5-hydroxymethyfurfural from hexose by heterogeneous catalyst comprising of strong acid cation exchange resin. This process is carried out continuously, particularly by the countercurrent principle. Strongly polar aprotic solvent such as dimethylsulfoxide, dimethylformamide, N- methylpyrrolidone, are used, this makes product isolation tedious and costly.
- 5-hydroxymethylfurfural is produce by dehydration of fructose and glucose using a biphasic reactor system, comprised of reactive aqueous phase modified with DMSO, combined with an organic extracting phase consisting of a 7:3 (w/w) MIBK-2-butanol mixture or dichloromethane by using mineral acid catalyst such as HC1, H 2 S0 4 , H 3 P0 4 .
- Solid acid catalysts such as H-zeolite and metal phosphates (vanadyl phosphate) give low conversion and low selectivity.
- metal phosphates vanadyl phosphate
- This invention deals with to replace the mineral acid catalysts by stable, reusable, non- toxic solid acid catalyst.
- This invention discloses a method for producing 5- hydroxymethylfurfural from fructose by using reusable ICaT-2 catalyst. Reactions are carried out in batch reactor by using mixture of solvents. OBJECTIVE OF THE INVENTION
- the objective of the present invention is to develop a process for production of 5- hydroxymethylfurfural from fructose with simplest reaction workup and with minimum production cost.
- Another objective of the present invention is reacting feedstock solution comprising of fructose with the heterogeneous ICaT-2 catalyst by using mixed solvent system to yield 5 -hydroxymethylfurfural in good yield.
- Yet another objective of the present invention is to use of cheaper and readily available biomass resources such as fructose to develop industrially feasible 5- hydroxymethylfurfural process.
- Another objective of the present invention is to develop method for preparation of 5- hydroxymethylfurfural from fructose, which utilizes minimum energy and gives minimum waste.
- the group of invention directed to a convenient method for production of 5- hydroxymethylfurfural (HMF) form renewable feedstock more precisely from fructose has been developed wherein fructose is dehydrated to 5-hydroxymethylfurfural by using ICaT-2 (Institute of Chemical Technology) catalyst in the presence of mixture of the solvents.
- Solvent selected from the group of water, methanol, ethanol, butanol, acetone, acetonitrile, dimethyl formamide, dimethyl sulfoxide and/or mixture thereof.
- ICaT-2 catalyst is heterogeneous solid acid catalyst. It comprises of rare earth metal complex anchored with organic-inorganic porous silica as base metal through organic linkage. This process has been developed for batch mode operation. 5- hydroxymethylfurfural is isolated from reaction mass by extraction followed by distillation.
- a present invention deals with the process for production of 5-hydroxymethylfurfural at substantial yield and purity from fructose in presence of heterogeneous mesoporous solid acid (ICaT-2) catalyst and mixed solvents system.
- IaT-2 heterogeneous mesoporous solid acid
- Process of invention comprises steps of
- step D) Isolating 5-hydroxymethylfurfural from product mixture of step A) to C) by a process selected from the group comprising of filtration, evaporation, extraction and distillation alone or in combination.
- heterogeneous solid acid catalyst comprises of rare earth metal complex anchored with hexagonal organic-inorganic mesoporous silica through organic linkage.
- Reaction of invention is performed in batch reactor or a batch reactor system in series for production of 5-hydroxymethylfurfural from fructose.
- Fructose solution are used in the range of 0.1% to 70% wt/wt, more preferably in the range of 1.0% to 50 % wt/wt of fructose solution and contacting of homogeneous solution of fructose with heterogeneous mesoporous ICaT-2 catalyst is done percentage in the range of 0.1 % to 50% wt wt percentage.
- Solvent used in the process of invention is selected from the group of solvents such as water, methanol, ethanol, butanol, acetone, acetonitrile, dimethyl formamide, dimethyl sulfoxide, N-methyl pyrrolidone and/or mixture thereof and solvent can be preferably the mixture of water: methanol, water: ethanol, water: acetone and water: acetonitrile and/or mixture thereof.
- Water content in organic solvent is in the range of 1 to 90 %, more preferably in the range of 5 to 50 %.
- reaction temperature is in the range. 50 °C to 300 °C, more preferably in the range of 80 °C to 250 °C and reaction time for contacting step is at least 10 hrs, more preferably in the range 1.0 min to 3 hrs.
- ICaT-2 Institute of Chemical Technology
- HMF 5-hydroxymethylfurfural
- ICaT-2 catalyst is comprises of rare earth metal complex anchored with organic-inorganic hexagonal porous silica as base metal through organic linkage.
- the present invention utilizes heterogeneous ICaT-2 which is easily re-generable and shows excellent reusability for 5-hyroxymethylfurfural process.
- the ICaT-2 catalyst composition has specific surface area in the range of 50 m 2 /g to 1000 m 2 /g and pore diameter in the range of 20-100 A.
- fructose dehydration reaction is carried out under moderate conditions by using ICaT-2 as catalyst and mixture of solvents.
- 5 -hydroxymethylfurfural (HMF) produced from renewable resources act as platform chemical because of the wide range of the chemical intermediates and end products is produced from these compounds which used in the polymer industry, fuel and pharmaceutical industries. The reaction is shown as below:
- fructose dehydration is carried out in batch mode operation by using an autoclave reactor. Reaction is agitated with four bladed pitch turbine impeller and temperature is maintained at +1°C of the desired value by PID controller.
- One of the embodiments of the present invention for 5-hydroxymethylfurfural production method wherein reactions are carried'out using heterogeneous ICaT-2 solid acid catalyst. It gives high efficiency for fructose conversion and excellent selectivity for 5- hydroxymethylfurfural.
- ICaT-2 catalyst is easily separable, regenerable, reusable and cost effective catalyst.
- 1.0 % to 50 % wt/wt fructose is present to the reaction mixture.
- fructose dehydration is carried out by using the solvent selected from the group of solvent such as water, methanol, ethanol, butanol, acetone, acetonitrile, dimethyl formamide, dimethyl sulfoxide and/or mixture thereof.
- solvent used for reaction is the mixture of aqueous and organic solvent.
- Organic solvents used are such as methanol, ethanol, acetonitrile and acetone and/or mixture of thereof in the range of 1 to 90 %, more preferably in the range of 5 to 50 %.
- reaction temperature is in the range of 50 °C to 300 °C, more preferably in the range of 50 °C to 250 °C are selected.
- reaction is online monitor on HPLC by using RI detector and ultraviolet (UV) detector both.
- ICaT-2 is prepared by a co-condensation sol-gel route. Hexadecyl amine was dissolved in ethanol and water mixture. Mixture of tetraethyl orthosilicate and 3- (mercaptopropyl)trimethoxysilane were added to the above solution. It is treated with lanthanum chloride (400 mg) for 2 h. The slurry was filtered and treated with trifluromethanesulfonic acid (5.4 mmol) at 30 °C for 2 h. The slurry was filtered and washed with water and dried under vacuum to get the active ICaT-2 catalyst.
- the reaction is performed by loading autoclave reactor with fructose (0.025 mol), 100 ml mixture of solvents (acetone and water 7:3) and specific amount of the ICaT-2 catalyst.
- the reactor is purged with nitrogen and temperature is raised to 160 °C.
- the experiments are carried out in a 300 cm stainless steel Parr autoclave. Reaction mixture is agitated with a four bladed pitch turbine impeller. The reaction temperature is maintained at 160 °C with an accuracy of + 1 °C by PID controller.
- Specific amount of ICaT-2 catalyst is added to reaction mixture (mentioned in Table 1). The effect of catalyst loading is studied with respect to variation in the quantity of catalyst (Drawing 1).
- the reaction is performed by loading autoclave reactor with fructose (0.025 mol), 100 ml mixture of solvents (7:3) and specific amount of the ICaT-2 catalyst (0.01 gm/cc). The reactor is purged with nitrogen and temperature is raised to 160 C.
- the experiments are carried out in a 300 cm stainless steel Parr autoclave. Reaction mixture is agitated with a four bladed pitch turbine impeller. The reaction temperature is maintained at 160 °C with an accuracy of + 1 °C by PID controller.
- the different mixture of solvents is used in these examples to evaluate the effect of solvent (mentioned in Table-2).
- the progress of the reaction is monitor on HPLC by using UV and RI detector. Calibration curve method is adopted for calculating percentage conversion and percentage yield quantitatively.
- catalyst is filtered and washed with acetone. Extraction and distillation procedures are employed for isolation of 5-hydroxymethylfurfural from the reaction mixture.
- the reactions are carried out in batch mode operation.
- the reaction is performed by loading autoclave reactor with fructose, 100 ml mixture of solvents (acetone :water 7:3) and specific amount of the ICaT-2 catalyst (0.01 gm/cc).
- the reactor is purged with nitrogen and temperature is raised to 160 °C.
- the experiments are carried out in a 300 cm stainless steel Parr autoclave. Reaction mixture is agitated with a four bladed pitch turbine impeller. The reaction temperature is maintained at 160 °C with an accuracy of + 1 °C by PID controller. Specific amount of fructose is added to reaction mixture (mentioned in Table-3). The progress of the reaction is monitor on HPLC by using UV and RI detector.
- Calibration curve method is adopted for calculating percentage conversion and percentage yield quantitatively.
- the different amount of fructose is used in these examples to evaluate its effect on conversion and yield (Drawing 2).
- catalyst is filtered and washed with acetone. Extraction and distillation procedures are employed for isolation of 5-hydroxymethylfurfural from the reaction mixture.
- the reaction is carried out in batch mode operation.
- the reaction is performed by loading autoclave reactor with fructose (0.025 mol), 100 ml mixture of solvents (acetone :water 7:3) and specific amount of the ICaT-2 catalyst (0.01 gm/cc).
- the reactor is purged with nitrogen and temperature is raised to desire value.
- the experiments are carried out in a 300 cm 3 stainless steel Parr autoclave.
- Reaction mixture is agitated with a four bladed pitch turbine impeller.
- the reaction temperature is maintained at desire value with an accuracy of + 1 °C by PID controller.
- the temperature of the reaction is varied in these examples (mentioned in Table-4).
- the progress of the reaction is monitor on HPLC by using UV and RI detector.
- Calibration curve method is adopted for calculating percentage conversion and percentage yield quantitatively. The effect of temperature in conversion and yield are shown in drawing 3. After completion of the reaction, catalyst is filtered and washed with acetone. Extraction and distillation procedures are employed for isolation of 5-hydroxymethylfurfural from the reaction mixture.
- the reaction is performed by loading autoclave reactor with fructose (0.025 mol), 100 ml mixture of solvents (acetone rwater 7:3) and specific amount of the ICaT-2 catalyst (0.01 gm/cc). The reactor is purged with nitrogen and temperature is raised to 160 °C. The experiments are carried out in a 300 cm stainless steel Parr autoclave. Reaction mixture is agitated with a four bladed pitch turbine impeller. The reaction temperature is maintained at 160 °C with an accuracy of + 1 °C by PID controller. The progress of the reaction is monitor on HPLC by using UV and RI detector. Calibration curve method is adopted for calculating percentage conversion and percentage yield quantitatively.
- the reusability of the catalyst is tested by conducting four runs. After completion of the reaction, the catalyst is filtered and washed with acetone. Then it is refluxed with 50 cm 3 of acetone for 30 min and dried at 120 °C for 2 h. The reusability of the catalyst is mentioned in these examples (Table 5). Extraction and distillation procedures are employed for isolation of 5- hydroxymethylfurfural from the reaction mixture.
- the isolation and purification of 5-hydroxymethylfurfural is carried out by a process selected from the group consisting of filtration, evaporation, extraction and distillation.
- Reaction mass is filtered through filter paper to remove solid heterogeneous ICaT-2 catalyst. Catalyst was washed with 50 cm of acetone.
- Reaction mass is distilled under reduced pressure to remove acetone and then aqueous mother liquor is extracted with 100 X 3 times organic solvent such as ethyl acetate, diethylether, methyl isobutyl ketone, dichloromethane, methyl -tertiary-butyl ether, butyl acetate.
- Organic layer is dried by using sodium sulfate and distilled under reduced pressure to get pure 98 % HMF.
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- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
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Abstract
Cette invention concerne un procédé de production de 5-hydroxyméthylfurfural à partir de fructose à l'aide d'un catalyseur acide solide hétérogène, ICaT-2, sans génération considérable de sous-produit. Le procédé est très économique dans la mesure où il implique un rendement élevé et un procédé de séparation simple du produit. Les réactions sont mises en œuvre par mélange du système de solvants dans le réacteur discontinu. Le procédé est tolérant vis-à-vis des charges à teneur élevée de fructose. La simplification de sa mise en œuvre, de la séparation du produit et la bonne recyclabilité du catalyseur en fait un procédé rentable, durable et efficace pour une utilisation industrielle. Un procédé d'isolation du 5-hydroxyméthylfurfural est également décrit. L'ICaT-2 est préparé par une voie de co-condensation sol-gel. Une hexadécylamine est dissoute dans un mélange d'éthanol et d'eau. Un mélange d'orthosilicate de tétraéthyle et de 3-(mercaptopropyl)triméthoxysilane est ajouté à la solution ci-dessus. Le mélange obtenu est traité avec du chlorure de lanthane (400 mg) pendant 2 h. La suspension épaisse est filtrée et traitée avec de l'acide triflurométhanesulfonique (5,4 mmol) à 30°C pendant 2 h. Elle est ensuite filtrée et lavée à l'eau, puis séchée sous vide pour obtenir le catalyseur ICaT-2 actif.
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IN2442/MUM/2010 | 2010-09-03 | ||
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IN2442MU2010 IN268182B (fr) | 2010-09-03 | 2011-02-18 |
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PCT/IN2011/000102 WO2012029071A2 (fr) | 2010-09-03 | 2011-02-18 | Composition de catalyseur (icat-2) comprenant du métal de terre rare |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103028424A (zh) * | 2013-01-10 | 2013-04-10 | 厦门大学 | 用于5-羟甲基糠醛合成的固体酸催化剂及其制备方法 |
CN115806535A (zh) * | 2021-09-14 | 2023-03-17 | 中国科学院大连化学物理研究所 | 一种5-羟甲基糠醛的制备方法 |
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2011
- 2011-01-24 WO PCT/IN2011/000048 patent/WO2012038969A1/fr active Application Filing
- 2011-02-18 WO PCT/IN2011/000102 patent/WO2012029071A2/fr active Application Filing
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Cited By (2)
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CN103028424A (zh) * | 2013-01-10 | 2013-04-10 | 厦门大学 | 用于5-羟甲基糠醛合成的固体酸催化剂及其制备方法 |
CN115806535A (zh) * | 2021-09-14 | 2023-03-17 | 中国科学院大连化学物理研究所 | 一种5-羟甲基糠醛的制备方法 |
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WO2012029071A3 (fr) | 2012-06-14 |
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