WO2024003017A1 - Procede de production de 5-hydroxymethylfurfural - Google Patents
Procede de production de 5-hydroxymethylfurfural Download PDFInfo
- Publication number
- WO2024003017A1 WO2024003017A1 PCT/EP2023/067408 EP2023067408W WO2024003017A1 WO 2024003017 A1 WO2024003017 A1 WO 2024003017A1 EP 2023067408 W EP2023067408 W EP 2023067408W WO 2024003017 A1 WO2024003017 A1 WO 2024003017A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- zeolite
- solvent
- fructose
- organic compound
- hexose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- C07D307/46—Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom
-
- 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
- C07D307/46—Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom
- C07D307/48—Furfural
-
- 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
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/22—After treatment, characterised by the effect to be obtained to destroy the molecular sieve structure or part thereof
-
- 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
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/30—After treatment, characterised by the means used
- B01J2229/38—Base treatment
-
- 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
- B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J2235/10—Infrared [IR]
-
- 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
- B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J2235/15—X-ray diffraction
-
- 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
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/084—Y-type faujasite
Definitions
- the invention relates to a process for producing 5-hydroxymethylfurfural (5-HMF) from a feed containing sugars, in particular at least one hexose and preferably fructose, in the presence of at least one solvent, preferably polar aprotic, and at least one dehydration catalyst comprising a zeolite modified by a basic treatment in the presence of organic compounds belonging to the family of tetraalkylammonium hydroxides.
- 5-HMF 5-hydroxymethylfurfural
- 5-Hydroxymethylfurfural is a compound derived from biomass that can be efficiently valorized in many ways, such as in specialty chemicals, polymers, or agrochemicals.
- the Rac et al. ((2014) Hierarchical ZSM-5, Beta and USY zeolites. Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction.
- Microporous and Mesoporous Materials vol. 194, p. 126-134
- zeolites modified by basic treatment in the presence of soda (NaOH) and tetrapropylammonium bromide in a process for dehydrating fructose to 5-HMF.
- the present invention aims to improve the performance of zeolite catalysts for the production of 5-HMF from sugars, while limiting costs.
- the applicant has in fact discovered that it is possible to use, as catalysts for the conversion of sugars into 5-HMF, zeolites modified by treatment in a basic medium in the presence of at least one organic compound acting as a directing agent of structure belonging to the category of tetraalkylammonium hydroxides without using any additional basic compound, such as sodium hydroxide, in order to improve the catalytic performance for the production of 5-HMF from hexoses.
- the selectivity is improved and the formation of oligomeric by-product is limited, and the process is more economical.
- the present invention relates to a process for dehydrating a feed comprising a hexose, said process comprising the steps of:
- a catalyst by contacting a zeolite comprising a series of channels whose opening is greater than or equal to 10 oxygen atoms (10MR) and having a Si/AI ratio of at least 10, with a solution comprising an organic compound of formula: Ri, R2, R3 and R4 being chosen independently from linear, branched or cyclic alkyl groups of 1 to 10 carbon atoms, and X- being the hydroxide ion OH-;
- the expression "between ... and " and “between .... and " are equivalent and mean that the limit values of the interval are included in the range of values described. If this is not the case and the limit values are not included in the range described, such precision will be provided by the present invention.
- the different parameter ranges for a given step such as the pressure ranges and the temperature ranges can be used alone or in combination.
- a range of preferred pressure values can be combined with a more preferred range of temperature values.
- the filler used in the process according to the invention comprises a hexose.
- the charge which comprises a hexose we mean that the hexose can be in monomeric form (monosaccharide) or be a unit belonging to a disaccharide, oligosaccharide or polysaccharide.
- a saccharide is a compound also called sugar.
- the hexose is fructose or a fructoside unit.
- the filler comprises free fructose, alone or in mixture with any saccharide species, or comprises any oligosaccharide or polysaccharide filler containing one or more fructoside units (s) capable of releasing fructose by one or more hydrolysis steps , possibly mixed with other saccharide species.
- the filler treated in the process is crystalline fructose, a syrup containing fructose and glucose, or crystalline sucrose or sucrose syrup.
- the filler comprises fructose in monomeric, oligomeric or polymeric form.
- filler containing free fructose taken in mixture with any saccharide species we mean for example syrups of the High-Fructose-Corn-Syrup type containing fructose and glucose in different proportions (glucose/fructose in mass or molar ratios 58/ 42, 45/55, 10/90 for example).
- syrup is meant a solution of sugars, in particular saccharides, in water having a concentration of at least 30% by weight, preferably at least 50% by weight, preferably at least 70% by weight.
- the filler may comprise a saccharide comprising one or more fructoside units and one or more non-fructoside units, fructose being able to be released by one or more hydrolysis steps, for example oligosaccharides and polysaccharides in which at least one monosaccharide unit is fructose, for example fillers such as sucrose, kestose, fructans, oligofructans, inulin.
- the saccharide fillers are capable of releasing monomeric fructose by saccharide hydrolysis, said fructose product being able to be transformed into 5-HMF.
- the oligosaccharide has the crude formula: (CemHiom+sOsm+i) (CsnHsn+sO ⁇ +i) where m and n are integers whose sum is between 2 and 6.
- the monosaccharide units composing said oligosaccharide are identical or not, and at least one unit of formula (C6mHio m+2 0 5 m+i) is fructose.
- the polysaccharide has the crude formula (C6mHio m+2 0 5m +i) (CsnHsn+sC n+i) where m and n are integers whose sum is greater than or equal to 7.
- the dehydration catalyst is prepared from a zeolite that includes a series of channels whose opening is greater than or equal to 10 oxygen atoms (10MR) and has a Si/Al molar ratio of at least 10.
- this starting zeolite is called mother zeolite.
- the opening of the series of channels of the zeolite is equal to 12 oxygen atoms (12MR).
- it is a zeolite belonging to the FAU or EMT structural type.
- it is a dealuminated faujasite, called USY (Ultra Stable Y), advantageously with a mesh parameter of less than 24.5 ⁇ .
- the Si/Al molar ratio of the mother zeolite is between 10 and 50, preferably between 12 and 35.
- a dealumination treatment can be applied, preferably prior to any step of contacting with an organic compound of the tetraalkylammonium hydroxide type, in order to obtain a zeolite. with a Si/Al molar ratio in the desired range.
- This dealumination treatment consists of bringing the zeolite into contact with an acid solution or a solution comprising a complexing agent, capable of forming a stable complex with Al 3+ in solution. These methods are well known to those skilled in the art. Some examples of well-suited acids are: HNO 3 , HCl, H2SO4, CH3COOH, HOOC-COOH.
- EDTA ethylene diamine tetraacetic acid
- NTA nitrilotriacetic acid
- concentration of the acid or the complexing agent in the acidic solution or comprising a complexing agent is preferably between 0.1 and 6 mol/L.
- the volume of solution used is preferably between 3 and 50 ml per gram zeolite (dry mass of zeolite).
- the temperature of the dealumination treatment is preferably between 20 and 100°C.
- the duration of the dealumination treatment is preferably between 15 min and 10 h.
- the zeolite is advantageously separated by filtration or centrifugation, dried, preferably at a temperature between 80 and 150°C, and finally calcined at a temperature between 450°C and 600°C.
- dry mass of a zeolite is meant: the mass of said zeolite after treatment at 1000°C.
- the zeolite (optionally after adjustment of the Si/Al ratio by dealumination) is brought into contact with a solution comprising an organic compound of formula :
- Ri, R2, R3 and R4 being independently chosen from linear, branched or cyclic alkyl groups of 1 to 10 carbon atoms, and X- being the hydroxide ion OH-.
- Said organic compound is more precisely called a tetraalkylammonium hydroxide.
- the groups Ri, R2, R3 and R4 may be identical or different.
- said organic compound comprises at least one group Ri, R2, R3, R4, chosen from methyl, ethyl, propyl, and butyl groups.
- the organic compound is chosen from tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide and tetrabutylammonium hydroxide.
- said organic compound comprises at least one group Ri, R2, R3, R4, chosen from propyl and butyl groups.
- the organic compound is chosen from tetrapropylammonium hydroxide and tetrabutylammonium hydroxide.
- This treatment of the zeolite by contact with a tetraalkylammonium, makes it possible to modify the acidity of the zeolite and to generate mesopores which are favorable to the diffusion of the reagents and products of the sugar dehydration reaction.
- the organic compound is in solution, preferably in aqueous solution, when it comes into contact with the zeolite.
- said solution does not include alkaline or alkaline earth hydroxides, such as NaOH.
- alkaline or alkaline earth hydroxides such as NaOH.
- NaOH or other alkali or alkaline earth hydroxides neutralizes the acidity of the zeolite and requires additional steps of retroexchange of Na+ (or alkaline or alkaline earth salts) after the basic treatment, these steps additional making the process expensive.
- said solution may comprise a second organic compound of formula: in which Ri, R2, R3 and R4 are independently chosen from linear, branched or cyclic alkyl groups of 1 to 10 carbon atoms and X- is chosen from halide ions Cl-, Br, I-.
- said solution may comprise an organic base, for example an amine such as dimethylamine or trimethylamine, as a second organic compound.
- an organic base for example an amine such as dimethylamine or trimethylamine, as a second organic compound.
- Bringing the zeolite into contact with the organic compound and optionally the second organic compound is preferably carried out in a container which allows stirring of the solution in order to ensure good exchange of material.
- the volume of the solution is defined in relation to the dry mass of zeolite used (i.e. mother zeolite). We generally choose a volume between 3 and 100 ml per gram of zeolite, preferably between 5 and 50 ml per gram of zeolite.
- the solution generally comprises a solvent being water, possibly mixed with another protic and polar solvent.
- the basic concentration of the solution, of the solution corresponds to the sum of the molar quantities of N(RI R 2 R 3 R4)OH plus that of the second organic compound optionally added, per unit volume of solution.
- This base concentration is advantageously between 0.1 and 2 mol/l, preferably between 0.1 and 0.3 mol/l.
- the ratio between the concentration of N(RI R 2 R 3 R4)+ and the total concentration of the base is between 1 and 0.1.
- the final pH of the solution that is to say, at the end of the treatment, is between 10 and 14.
- the basic treatment is carried out at a temperature between 20 and 90°C, preferably between 50 and 70°C.
- the duration of the treatment is between 15 minutes and 10 hours, preferably between 1 and 4 hours.
- the zeolite also called treated zeolite
- the zeolite is advantageously separated from the solution by filtration or centrifugation.
- the zeolite resulting from the treatment is separated then dried at a temperature between 80 and 150°C (possibly by applying vacuum) and finally calcined at a temperature between 500 and 650°C, in a flow of nitrogen or air.
- a temperature between 80 and 150°C possibly by applying vacuum
- calcined at a temperature between 500 and 650°C, in a flow of nitrogen or air.
- the duration of the final temperature level is between 1 and 12 hours.
- the dehydration catalyst of the process according to the invention comprises the treated zeolite, obtained at the end of the basic treatment and preferably separated, dried and calcined. Said zeolite obtained at the end of the basic treatment, and preferably separated, dried and calcined, can optionally be mixed with a binder, to constitute said dehydration catalyst.
- Said process includes a dehydration step.
- Said sugar dehydration step is carried out by bringing the charge which comprises a hexose into contact with the dehydration catalyst in at least one solvent, preferably organic.
- the process according to the invention is advantageously a process for producing 5-hydroxymethylfurfural from a feedstock comprising a hexose.
- the dehydration step of the process according to the invention implemented by bringing the charge which comprises a hexose into contact with the dehydration catalyst in at least one solvent, can be carried out continuously or batchwise.
- Said step of bringing the charge which comprises a hexose into contact with the dehydration catalyst in at least one solvent is carried out at a temperature between 30 and 160°C, preferably between 40 and 140°C, preferably between 50 and 120°C, preferably 80 and 120°C, very preferably between 90 and 120°C and at a pressure of between 0.0001 and 8.0 MPa, preferably between 0.001 and 5.0 MPa, and more preferably between 0.01 and 3.0 MPa.
- the reaction medium comprises the feed comprising a hexose, at least one preferably organic solvent and the dehydration catalyst.
- the solvent is a polar aprotic solvent.
- the aprotic polar solvent is advantageously chosen from butan-2-one, acetone, acetic anhydride, /V,/V,/V',/V-tetramethylurea, benzonitrile, acetonitrile, methyl ethyl ketone, propionitrile, hexamethylphosphoramide, nitrobenzene, nitromethane, /V,/V-dimethylformamide, /V,/V-dimethylacetamide, sulfolane, /V-methylpyrrolidone, dimethyl sulfoxide, propylene carbonate and g- valerolactone.
- the aprotic polar solvent is chosen from acetone, hexamethylphosphoramide, /V,/V-dimethylformamide, sulfolane, /V-methylpyrrolidone, dimethylsulfoxide, propylene carbonate and g-valerolactone.
- the polar aprotic solvent is dimethyl sulfoxide (DMSO).
- the advantage of using an aprotic polar solvent in the process is that the 5-HMF produced does not rehydrate, the rehydration of 5-HMF in a solvent such as water for example induces a loss of selectivity of the process towards the 5-HMF.
- a polar aprotic solvent therefore makes it possible to obtain optimal selectivity of the process towards 5-HMF.
- aprotic solvent we mean a molecule acting as a solvent and in which all the hydrogen atoms are carried by carbon atoms.
- polar solvent a molecule playing the role of solvent whose dipole moment p expressed in Debye has a numerical value greater than or equal to 2.00 at 25°C, according to the databases known to man of the job.
- polar aprotic solvent we therefore mean a molecule playing the role of solvent in which all the hydrogen atoms are carried by carbon atoms and whose dipole moment p expressed in Debye has a numerical value greater than or equal to 2.00 at 25°C, according to databases known to those skilled in the art.
- the charge is introduced into the reaction medium in a solvent/charge mass ratio of between 0.1 and 200.0, preferably between 0.3 and 100.0 and more preferably between 1.0 and 50.0.
- Said dehydration step is advantageously supplied by the charge comprising a hexose, in solid or liquid form.
- the load can be supplied using several modes of introducing said load.
- the charge is introduced in solid form, possibly using a suitable device making it possible to control the charge flow.
- this device can be an endless screw or a pneumatic system for transporting solid particles.
- this embodiment is preferred for an oligosaccharide or polysaccharide type filler.
- the introduction of a filler in solid form corresponding to sucrose, kestose or inulin from which fructose is released by hydrolysis is a possibility. Said introduction can be carried out one or more times, sequentially or continuously.
- the filler is introduced in liquid form, in solution in a solvent, called additional solvent, using a pump making it possible to control the rate of introduction of the solution containing the filler.
- additional solvent makes it possible to dissolve the sugars (or saccharides) in the filler.
- the additional solvent can be chosen from polar aprotic or protic solvents.
- said additional solvent is chosen from butan-2-one, acetone, acetic anhydride, /V,/V,/V',/V-tetramethylurea, benzonitrile, acetonitrile, methyl ethyl ketone, propionitrile, hexamethylphosphoramide, nitrobenzene, nitromethane, N,N-dimethylformamide, /V,/V-dimethylacetamide, sulfolane, /V-methylpyrrolidone, dimethylsulfoxide, propylene carbonate, g-valerolactone, water, methanol, ethanol, formic acid and acetic acid.
- the additional solvent chosen from polar aprotic or protic solvents is acetone, hexamethylphosphoramide, /V,/V-dimethylformamide, sulfolane, N-methylpyrrolidone, dimethylsulfoxide, propylene carbonate, g-valerolactone water, methanol and ethanol, preferably from /V,/V-dimethylformamide, sulfolane, /V-methylpyrrolidone, dimethylsulfoxide, water and methanol, and very preferably the solvent additional is chosen from water and dimethyl sulfoxide.
- the final concentration of 5-HMF cannot exceed the solubility limit of the sugar in the additional solvent, affected by the molar mass ratio between fructose and 5-HMF, and affected by the dilution of the charge by the mass of aprotic polar solvent.
- the choice of additional solvent is therefore essential to obtain a high final concentration of 5-HMF.
- the content of at least one additional solvent is between 0 and 50% by weight, preferably between 0 and 35% by weight, preferably between 0 and 25% by weight, and very preferably between 0 and 20% by weight. weight relative to the total weight of solvent in the reaction medium.
- This embodiment is particularly well suited to a monosaccharide or even oligosaccharide type filler, which can be dissolved in the additional solvent at high concentrations.
- the progressive introduction of a load corresponding to a fructose syrup or a fructose and glucose syrup (of the High-Fructose-Corn-Syrup type according to the English name) via a pump is Implementation.
- Said introduction can be carried out one or more times, sequentially or continuously, so that the instantaneous fructose concentration is maintained less than or equal to 5.0% by weight.
- concentration of 5-HMF or fructose is meant the ratio between the mass of 5-HMF or fructose, respectively, and the mass of reaction medium.
- the hourly mass speed (mass feed rate/mass of catalysts) is between 0.01 h -1 and 5.0 h -1 and preferably between 0. 02h -1 and 2.0h -1 .
- the water generated and therefore contained in the reaction mixture is preferably eliminated, by all methods known to those skilled in the art, preferably in a manner continuous, in order to maintain a water content of less than 30.0% by weight relative to the total mass of solvent, preferably less than 20.0% by weight, preferably less than 15.0% by weight, and very preferably less than 10.0% by weight.
- the implementation of the process for producing 5-HMF in particular by controlling the instantaneous concentration, and in conjunction with the use of a zeolite modified according to the step of preparing the catalyst according to the invention makes it possible to obtain good conversion of the fructose involved, as well as excellent selectivity in favor of 5-HMF and improving productivity in 5-HMF.
- the selectivity, yield and productivity obtained by implementing the process according to the invention make it possible, for example, to achieve final mass concentrations of 5-HMF greater than 3.5% by weight.
- the process according to the invention advantageously makes it possible to achieve final mass concentrations of 5-HMF greater than 5.0% by weight, preferably greater than 10% by weight, and very preferably greater than 15% by weight relative to to the weight of the reaction medium.
- the product selectively obtained by the transformation process according to the invention is 5-hydroxymethylfurfural (5-HMF).
- the reaction medium is analyzed by high performance liquid chromatography (HPLC) to quantify the compounds present in the reaction medium, such as fructose, 5-HMF but also unwanted products such as levulinic acid, formic acid and any co-products containing sugars.
- HPLC high performance liquid chromatography
- Humins are quantified by difference in carbon balance with the carbon initially introduced.
- the fructose used as filler is commercial fructose and used without further purification.
- DMSO dimethyl sulfoxide
- the mass concentrations of the constituents of the reaction mixtures are determined by high performance liquid chromatography (HPLC). Aliquots of the reaction mixture, i.e. samples, are taken at regular intervals to evaluate their composition by HPLC. Lacks of 100% for HMF yields are linked either to a partial conversion of fructose, or to the formation of unwanted products (humins, polymeric species, etc.).
- the fructose conversion rate (Conv F Ru) is defined as the ratio of the molar concentration of converted fructose and the molar concentration of fructoside units present in the initial charge, expressed in%.
- the yield of 5-HMF (RdtHMF) is defined as the ratio of the molar concentration of 5-HMF measured in the samples and the molar concentration of fructoside units only present in the initial charge, expressed in%.
- the different samples are prepared using the same procedure, only the mother zeolite and the nature of the tetralkylammonium hydroxide change.
- the CBV720 mother zeolite used has a Si/Al molar ratio of 15.7 and a lattice parameter of 24.293 ⁇ .
- the CBV760 mother zeolite used has a Si/Al molar ratio of 27.2 and a lattice parameter of 24.259 ⁇ .
- 300 ml of a 0.2 M aqueous solution of tetralkylammonium hydroxide is prepared with distilled water.
- 10 g of mother zeolite are introduced and stirred at 400 rpm for 2 h at 65°C.
- the solution is quenched in ice water, filtered and washed 3–4 times with 300 ml of distilled water and centrifuged at 8000–10000 rpm for 3 min.
- the recovered solid is dried in an oven at 120° C. overnight.
- the dried solid is crushed and calcined at 550 °C for 4 h (1 °C min -1 ) after 2 hours of rest at 200 °C (1.5 °C min -1 ).
- a comparative solid is prepared according to the prior art (BC), with a CBV760 as mother zeolite and a treatment with NaOH and tetrapropylammonium bromide.
- the BET specific surface area (SBET in m2/g) is determined by nitrogen adsorption in accordance with the ASTM-D-3663-78 standard established from the BRUNAUER-EMMETT-TELLER method described in the periodical "The Journal of American Society ", 1938, 60, 309.
- the total pore volume corresponds to the volume adsorbed at saturation of the pores (relative pressure of N2 of 0.99).
- the mesoporous volume is the difference between the total pore volume and the microporous volume.
- the relative crystallinity of the zeolite is measured by X-ray diffraction. To evaluate the crystallinity, the diffraction lines are integrated between the angles 2 theta of 10 and 70°. We calculate the ratio between the integral with baseline correction and without baseline correction. Baseline. This ratio is then normalized by the ratio of a reference zeolite (the mother zeolite before treatment).
- Bronsted acid is meant a compound capable of releasing an H+ proton into the reaction medium.
- Lewis acid we mean a compound that can accept a doublet of electrons.
- the concentration of Bronsted acid sites and Lewis acid sites in the zeolite is measured by pyridine adsorption.
- the zeolite is first dehydrated under vacuum at 450°C and then exposed to pyridine vapor at 150°C. Excess pyridine is removed under vacuum.
- the concentration of Bronsted acid sites is determined by transmission IR spectroscopy, by the integration of the band at 1540 cm-1; the conversion of the intensity into mol/g is carried out by applying an extinction coefficient of 1.65 cm/pmol.
- the concentration of Lewis acid sites is determined by integration of the band at 1450 cm-1, applying an extinction coefficient of 1.57 pmol/g.
- Table 3 shows that treatments with a tetraalkylammonium hydroxide preserve the microporous volume of the zeolite well, particularly with tetrapropylammonium and tetrabutylammonium (A3, A4, B3 and B4).
- the mesoporous volume is greatly increased in all cases.
- the crystallinity is also very well preserved by the treatment, with the exception of B1.
- the acidity is close to or higher than the parent zeolite, with the exception of B1.
- Example 2 Use of the solids from Example 1 for the conversion of fructose into 5-HMF
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380048764.5A CN119403793A (zh) | 2022-07-01 | 2023-06-27 | 合成5-羟甲基糠醛的方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22182679.5A EP4299566A1 (fr) | 2022-07-01 | 2022-07-01 | Procede de production de 5-hydroxymethylfurfural |
| EP22182679.5 | 2022-07-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024003017A1 true WO2024003017A1 (fr) | 2024-01-04 |
Family
ID=82547485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/067408 Ceased WO2024003017A1 (fr) | 2022-07-01 | 2023-06-27 | Procede de production de 5-hydroxymethylfurfural |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4299566A1 (fr) |
| CN (1) | CN119403793A (fr) |
| WO (1) | WO2024003017A1 (fr) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012050625A2 (fr) * | 2010-01-15 | 2012-04-19 | California Institute Of Technology | Isomérisation de sucres |
-
2022
- 2022-07-01 EP EP22182679.5A patent/EP4299566A1/fr active Pending
-
2023
- 2023-06-27 CN CN202380048764.5A patent/CN119403793A/zh active Pending
- 2023-06-27 WO PCT/EP2023/067408 patent/WO2024003017A1/fr not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012050625A2 (fr) * | 2010-01-15 | 2012-04-19 | California Institute Of Technology | Isomérisation de sucres |
Non-Patent Citations (4)
| Title |
|---|
| DAPSENS ET AL.: "Hierarchical Sn-MFI zeolites prepared by facile top-down methods for sugar isomérisation", CATALYSIS SCIENCE & TECHNOLOGY, vol. 4, no. 8, 2014, pages 2302 |
| ORDOMSKY ET AL.: "The effect of solvent addition on fructose dehydration to 5-hydroxymethylfurfural in biphasic system over zeolites", JOURNAL OF CATALYSIS, vol. 287, 2012, pages 68 - 75, XP093002388, DOI: 10.1016/j.jcat.2011.12.002 |
| RAC ET AL.: "Hierarchical ZSM-5, Beta and USY zeolites. Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction", MICROPOROUS AND MESOPOROUS MATERIALS, vol. 194, 2014, pages 126 - 134, XP029028743, DOI: 10.1016/j.micromeso.2014.04.003 |
| RAC VLADISLAV ET AL: "Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction", MICROPOROUS AND MESOPOROUS MATERIALS, vol. 194, 12 April 2014 (2014-04-12), pages 126 - 134, XP029028743, ISSN: 1387-1811, DOI: 10.1016/J.MICROMESO.2014.04.003 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119403793A (zh) | 2025-02-07 |
| EP4299566A1 (fr) | 2024-01-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0561928A1 (fr) | Procede de preparation d'hydroxymethyl-5 furfural par catalyse heterogene. | |
| FR3076554A1 (fr) | Procede de production de 5-hydroxymethylfurfural | |
| US9676697B2 (en) | Conversion of carbohydrates to levulinic acid esters | |
| EP3224234B1 (fr) | Procédé de préparation d'esters de l'acide lactique et de l'acide 2-hydroxy-3-buténoïque à partir de sucres | |
| EP2892907B1 (fr) | Isomérisation d'aldoses en c4-c6 avec des zéolites | |
| EP3801895B1 (fr) | Procédé de synthèse d'un matériau composite composé d'un mélange de zéolithes de type structural afx et de type structural bea en présence d'un structurant organique azoté | |
| EP0516801B1 (fr) | Zeolithe de type mtw et son procede de preparation | |
| FR3042189A1 (fr) | Procede pour produire un hydrocarbure aromatique, du p-xylene et de l'acide terephtalique | |
| FR3071497A1 (fr) | Procede de production de 5-hydroxymethylfurfural en presence d'un catalyseur inorganique de deshydratation et d'une source de chlorure | |
| EP0855369A1 (fr) | Zéolithe au phosphore de type structural CON, sa préparation et son utilisation en craquage catalytique | |
| FR3081343A1 (fr) | Procede de preparation d’une zeolithe de type structural afx par synthese en presence d’un structurant organique azote | |
| EP4299566A1 (fr) | Procede de production de 5-hydroxymethylfurfural | |
| EP3986881A1 (fr) | Procede de production de 5-hydroxymethylfurfural | |
| EP3801892B1 (fr) | Procede de preparation d'une zeolithe de type structural afx de haute purete avec un structurant organique azote | |
| EP3538502B1 (fr) | Procede de deshydratation isomerisante d'une charge alcool primaire non lineaire en presence d'injection d'eau et d'un catalyseur comprenant une zeolithe de type fer ou mfs | |
| FR3095199A1 (fr) | Procédé de synthèse rapide d'une zeolithe de type structural AFX avec une source de faujasite | |
| FR3054219A1 (fr) | Nouveaux procedes d'obtention de composes aromatiques a partir de composes furaniques et d'ethanol. | |
| FR3109103A1 (fr) | Méthode de synthèse de la zéolithe mordénite (MOR) de haut rapport Si/Al | |
| FR3110907A1 (fr) | Procédé de synthèse d’une zéolithe IZM-6 en présence d’un structurant organique azoté | |
| FR3142106A1 (fr) | Synthese d’une zeolithe izm-8 de type structural fer de haute purete | |
| EP4037828B1 (fr) | Synthese a basse temperature de zeolithe afx de haute purete | |
| WO2020212355A1 (fr) | Procede de synthese rapide d'une zeolithe de type structural afx par synthese en presence d'un structurant organique azote | |
| WO2025125027A1 (fr) | Procédé de synthèse d'une zéolithe izm-10 de type structural aei de très haute pureté en présence d'un structurant organique azoté | |
| EP0427579B1 (fr) | Zéolithe de type mordénite et son procédé de préparation | |
| WO2018087032A1 (fr) | Procédé de déshydratation isomérisante de monoalcools primaires non linéaires sur catalyseur zéolithique dopé d'alcalin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23735693 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202380048764.5 Country of ref document: CN |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWP | Wipo information: published in national office |
Ref document number: 202380048764.5 Country of ref document: CN |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 23735693 Country of ref document: EP Kind code of ref document: A1 |






