WO2016038019A1 - Verfahren zur herstellung von 2-alkoxycyclohexanol - Google Patents
Verfahren zur herstellung von 2-alkoxycyclohexanol Download PDFInfo
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- WO2016038019A1 WO2016038019A1 PCT/EP2015/070472 EP2015070472W WO2016038019A1 WO 2016038019 A1 WO2016038019 A1 WO 2016038019A1 EP 2015070472 W EP2015070472 W EP 2015070472W WO 2016038019 A1 WO2016038019 A1 WO 2016038019A1
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- 0 *OC(CCCC1)C1O Chemical compound *OC(CCCC1)C1O 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/05—Preparation of ethers by addition of compounds to unsaturated compounds
-
- 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
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/7038—MWW-type, e.g. MCM-22, ERB-1, ITQ-1, PSH-3 or SSZ-25
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/46—Other types characterised by their X-ray diffraction pattern and their defined composition
- C01B39/48—Other types characterised by their X-ray diffraction pattern and their defined composition using at least one organic template directing agent
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/03—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by addition of hydroxy groups to unsaturated carbon-to-carbon bonds, e.g. with the aid of H2O2
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D301/00—Preparation of oxiranes
- C07D301/02—Synthesis of the oxirane ring
- C07D301/03—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
- C07D301/12—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with hydrogen peroxide or inorganic peroxides or peracids
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/16—Systems containing only non-condensed rings with a six-membered ring the ring being unsaturated
Definitions
- the present invention relates to a process for the preparation of 2-alkoxycyclohexanol, a mixture obtained by this process containing 2-alkoxycyclohexanol, and the use of this mixture for the preparation of 4-hydroxy-3-alkoxybenzaldehyde.
- GB 2 252 556 A discloses a process for the preparation of 2-methoxy and 2-ethoxycyclohexanol in which cyclohexene with hydrogen peroxide, methanol or ethanol and optionally sulfuric acid in the presence of a catalyst composition obtained by drying and calcining a mixture of titanium tetraenolate and silica gel in hexane or ethanol is reacted.
- a catalyst composition obtained by drying and calcining a mixture of titanium tetraenolate and silica gel in hexane or ethanol is reacted.
- a selectivity of 95% for the target product 2-methoxycyclohexanol is achieved only for the preparation of 2-methoxycyclohexanol, but with the disadvantage that in order to achieve this high selectivity, the addition of sulfuric acid to the reaction mixture is required.
- EG Derouane et al. "Titanium-substituted zeolite beta: an efficient catalyst in the oxy-functionalization of cyclic alkenes using hydrogen peroxide in organic solvents" New J. Chem., 1998, pages 797-799 discloses a process for the preparation of 2-alkoxycyclohexanol in which cyclohexene is reacted with hydrogen peroxide and an alkyl alcohol selected from the group consisting of methanol, ethanol, propanol, isopropyl alcohol and tert-butanol in the presence of a Ti-Al-beta zeolite catalyst. It is an object of the invention to provide a novel process for the preparation of 2-alkoxycyclohexanol. It is a further object of the invention to provide a mixture containing a 2-alkoxycyclohexanol.
- the present invention relates to a process for the preparation of a compound of formula (I)
- Ri is an alkyl group having 1 to 4 carbon atoms, comprising
- the framework of the zeolitic material according to (ii) contains silicon, titanium, boron, oxygen and hydrogen.
- the present invention relates to a mixture comprising a compound of the formula (I)
- R 1 is an alkyl radical having 1 to 4 carbon atoms, obtainable or obtainable by the process according to the invention, the molar content of the mixture being based on the compound of the formula (I) based on the sum of the molar contents of the mixture of the compounds of the formulas (I) , (II), (II I), (IV) and (V)
- Ri of the compound of the formula (I) and of the alcohol R-OH is an alkyl radical having 1 to 4 carbon atoms, ie having 1, 2, 3, or 4 carbon atoms. According to (i), it is possible that a mixture of two or more alcohols R ⁇ H is used, which differ in the alkyl radical R ⁇ .
- the radical R 1 may be suitably substituted, where R 1 may have one or more substituents, which may be, for example, a hydroxy, chlorine, fluorine, bromine, iodine, nitro or amino radical.
- the alkyl radical R is an unsubstituted alkyl radical, preferably selected from the group consisting of methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, and tert-butyl, more preferably from the group consisting of methyl , Ethyl, n-propyl, and iso-propyl, more preferably from the group consisting of methyl and ethyl. More preferably Ri is methyl.
- the present invention also relates to a process for the preparation of a compound of formula (I)
- the present invention also relates to a mixture comprising a compound of the formula (I) (I) wherein Ri is methyl, obtainable or obtainable by the process according to the invention, the molar content of the mixture of the compound of the formula (I) being based on the sum of the molar contents of the mixture of the compounds of the formulas (I), (II), ( II I), (IV) and (V)
- composition of the liquid mixture according to (i) is not subject to any particular restriction
- the molar ratio cyclohexene: F OH may be less than, equal to or greater than 1: 1. It is preferred that in the liquid mixture provided according to (i) before the reaction according to (ii), the molar ratio cyclohexene: R ⁇ OH is at most 1: 1. More preferably, the molar ratio cyclohexene: F ⁇ OH in the according to (i) provided liquid mixture prior to the reaction according to (ii) in the range of 1: 1 to 1: 50, more preferably from 1: 3 to 1: 30, further preferably from 1: 5 to 1:10.
- the molar ratio of cyclohexene: hydrogen peroxide may be less than, equal to or greater than 1: 1. It is preferred that in the liquid mixture provided according to (i) before the reaction according to (ii) the molar ratio cyclohexene hydrogen peroxide is at least 1: 1. More preferably, the molar ratio of cyclohexene: hydrogen peroxide in the liquid mixture prepared according to (i) before the reaction according to (ii) is in the range from 1: 1 to 5: 1, more preferably from 1, 5: 1 to 4.5: 1 , more preferably from 2: 1 to 4: 1.
- a solvent may be included in the liquid mixture provided according to (i). If a solvent is contained, this is preferably selected from the group consisting of C 1 -C 6 -alkylnitriles, ie C 1, C 2 , C 3, C 4, C 5 or C 6 -alkylnitriles, dialkyl ketones of the formula R 2 -CO-R 3 in which R 2 and R 3 are each independently selected from the group consisting of C 1 -C 6 -alkyl, ie C 1, C 2, C 3, C 4, C 5 or C 6 -alkyl, and a mixture of two or more thereof, more preferably selected from the group consisting of C1-C3 alkynitriles, ie C1, C2 or C3-alkylnitriles, dialkyl ketones of the formula R 2 -CO-R 3 , wherein R 2 and R 3 are each independently selected from the group consisting of C1-C3-alkyl, ie C1-, C2- or C
- the molar ratio of solvent: cyclohexene may in principle be less than, equal to or greater than 1: 1. It is preferred that in the liquid mixture provided according to (i) before the reaction according to (ii), the molar ratio of solvent: cyclohexene is at least 1: 1. More preferably, the molar ratio of solvent to cyclohexene in the liquid mixture prepared according to (i) before the reaction according to (ii) is in the range from 20: 1 to 1: 1, more preferably from 15: 1 to 1: 1, more preferably from 10: 1 to 1: 1.
- the solvent: cyclohexene molar ratio refers to the mixture of solvents.
- the mixture provided according to (i) contains no solvent.
- the liquid mixture provided according to (i) preferably consists of at least 90% by weight, more preferably at least 95% by weight, more preferably at least 98% by weight, more preferably at least 99% by weight, more preferably at least 99.5% by weight, more preferably at least 99.9% by weight of cyclohexene, F ⁇ OH, methanol, hydrogen peroxide and optionally water, if water is used in the form of an aqueous solution as described below.
- the temperature at which the liquid mixture according to (i) is provided is basically not limited. It is preferable that the liquid mixture according to (i) is provided at a temperature in the range of 5 to 50 ° C, more preferably 10 to 40 ° C, further preferably 15 to 30 ° C.
- the liquid mixture according to (i) is not subject to any particular restriction.
- the liquid mixture according to (i) can be provided by mixing the cyclohexene, the alcohol R 1 OH, the hydrogen peroxide and optionally the solvent in any order. It is preferred to provide the liquid mixture according to (i) by adding the hydrogen peroxide to a mixture containing the cyclohexene, the alcohol R 1 H and optionally the solvent.
- the mixture containing the cyclohexene, the alcohol R 1 H and the optional solvent at a temperature in the range of 5 to 50 ° C, more preferably 10 to 40 ° C, further preferably 15 to 30 ° C and when the hydrogen peroxide is added, to maintain the temperature of the resulting mixture suitably within the aforementioned temperature ranges.
- the hydrogen peroxide is added as a solution in one or more suitable solvents.
- Possible solvents are, for example, water or organic solvents such as organic solvents selected from the group consisting of C 1 -C 6 -alcohols, C 1 -C 6 -alkylnitriles, dialkyl ketones of the formula R 2 - CO-R 3 , where R 2 and R 3 are each independently selected from the group consisting of C1-C6 alkyl, and a mixture of two or more thereof, preferably from the group consisting of C1-C3 alcohols, C1-C3 alkynitriles, dialkyl ketones of the formula R 2 - CO-R3, wherein R 2 and R 3 are each independently selected from the group consisting of C 1 -C 3 alkyl, and a mixture of two or more thereof, more preferably selected from the group consisting of methanol, acetonitrile, acetone and a mixture thereof.
- organic solvents selected from the group consisting of C 1 -C 6 -alcohols, C 1 -C 6 -alkyl
- the hydrogen peroxide is preferably added in the form of a methanolic or aqueous, preferably aqueous solution.
- the content of the preferred aqueous solution of hydrogen peroxide is not particularly limited, and is preferably in the range of 25 to 75% by weight, more preferably 40 to 70% by weight, based on the total weight of the aqueous solution.
- the mixture provided according to (i) preferably contains no strong non-nucleophilic inorganic acid, preferably no sulfuric acid.
- the catalyst used in (ii) has a high selectivity with respect to the target product 2-alkoxycyclohexanol.
- the catalyst used in (ii) is not particularly limited.
- the zeolitic material of the framework structure MWW has at least one of the following features according to the listed embodiments, including the combinations of embodiments according to the stated dependencies:
- Zeolitic material of the framework structure MWW wherein the framework of the zeolitic material contains boron and titanium, wherein preferably at least 99% by weight, more preferably at least 99.5% by weight, more preferably at least 99.9% by weight of the zeolitic framework Materials made of silicon, titanium, boron, oxygen and hydrogen.
- a zeolitic material according to Embodiment 1 wherein the molar ratio B: Si is in the range of 0.02: 1 to 0.5: 1, preferably 0.05: 1 to 0.15: 1, and the molar ratio of Ti: Si in the range of 0.01: 1 to 0.05: 1, preferably 0.017: 1 to 0.025: 1.
- a zeolitic material according to embodiment 1 or 2 wherein the zeolitic material is in the calcined state.
- a zeolitic material according to Embodiment 3 wherein the calcined state of the zeolitic material is achieved by calcining the zeolitic material in its uncalcined state at a temperature in the range of 500 to 700 ° C, preferably 550 to 700 ° C, more preferably 600 to 700 ° C, preferably within a period in the range of 0, 1 to 24 h, more preferably from 1 to 18 h, more preferably from 6 to 12 h, preferably in an oxygen-containing atmosphere.
- TOC total organic carbon
- Spectrum of zeolitic material includes:
- the ratio of the integral of the range of the first signal to the integral of the range of the third signal preferably in the range of 0.6 to 1, 1, more preferably from 0.7 to 1, 0, more preferably from 0.8 to 0, 9 lies.
- a zeolitic material according to any of embodiments 1 to 6, wherein the 11 B-NMR spectrum of the zeolitic material comprises:
- a second signal in the range of 10.0 to 1.0 ppm, preferably with a peak in the
- Range from 6.5 to 5.5 ppm, more preferably from 6.2 to 5.8 ppm,
- a third signal in the range of 1.0 to -7.0 ppm, preferably with a peak in the range of -2.4 to -3.4 ppm, more preferably from -2.7 to -3.1 ppm,
- the ratio of the integral of the range of the third signal to the integral of the range of the second signal preferably in the range of 1, 00 to 1, 15, more preferably from 1, 05 to 1, 15, more preferably from 1, 10 to 1, 15 lies.
- a zeolitic material according to any one of embodiments 1 to 10 characterized by an X-ray diffractogram showing peaks at 2 theta angles of (7.2 ⁇ 0.1) °, (14.5
- Zeolitic material according to embodiment 1 characterized by an X-ray diffractogram which additionally peaks at 2 theta angles of (7.0 ⁇ 0.1) °, (8,1
- zeolitic material of embodiment 18, wherein the aqueous synthesis mixture provided according to (a) is prepared by adding the silicon source to an aqueous mixture containing the boron source, the titanium source, and the MWW template compound.
- the zeolitic material of embodiment 18 or 19, wherein the aqueous mixture containing the boron source, the titanium source, and the MWW template compound is prepared by adding a mixture containing a portion of the MWW template compound and the silicon source to an aqueous mixture containing a portion of the MWW template compound and the boron source, wherein the mixture containing a portion of the MWW template compound and the titanium source preferably contains no water.
- a zeolitic material according to any one of embodiments 18 to 21, wherein according to (a) the silicon source is selected from the group consisting of fumed silica, colloidal silica, silicon alkoxides, and a mixture of two or more thereof, preferably from the group consisting of fumed silica, colloidal silica and a mixture thereof, wherein the silicon source is more preferably fumed silica;
- the boron source is selected from the group consisting of boric acid, borates, boron oxide and a mixture of two or more thereof, preferably from the group consisting of boric acid, borates and a mixture thereof, the boron source more preferably boric acid;
- the titanium source is selected from the group consisting of titanium alkoxides, titanium halides, titanium salts, titanium dioxide and a mixture of two or more thereof, preferably from the group consisting of titanium alkoxides, titanium halides and a mixture thereof, the titanium source more preferably a titanium alkoxide, more preferably titanium tetrabutoxide is;
- the MWW template compound is selected from the group consisting of piperidine, hexamethyleneimine, N, N, N, N ', N', N'-hexamethyl-1, 5-pentanediammonium salts, 1, 4-bis (N-methylpyrrolidinyl) butane , Octyltrimethylammoniumhydroxid, heptyltrimethylammonium hydroxide, hexyltrimethylammonium hydroxide and a mixture of two or more thereof, preferably from the group consisting of piperidine, hexamethyleneimine and a mixture thereof, wherein the MWW template compound is more preferably piperidine.
- the boron source calculated as elemental boron, based on the silicon source, calculated as elemental silicon, in a molar ratio ranging from 0.18: 1 to 5.2: 1, preferably from 0.5: 1 to 3: 1;
- the titanium source calculated as elemental titanium, based on the silicon source, calculated as elemental silicon, in a molar ratio ranging from 0.005: 1 to 0.15: 1, preferably from 0.01: 1 to 0.1: 1;
- 700 ° C. more preferably from 600 to 700 ° C., preferably for a period of from 0.1 to 24 h, more preferably from 1 to 18 h, more preferably from 6 to 12 h.
- a zeolitic material according to any of embodiments 18 to 34 wherein before (f) the zeolitic material of the framework MWW is not treated with an aqueous solution having a pH of at most 6 as determined by a pH-sensitive glass electrode, and wherein after the steps ( f) and (g) the shaped body containing the zeolitic material of the framework structure MWW is not treated with an aqueous solution having a pH of at most 6, determined by means of a pH-sensitive glass electrode.
- Shaped body containing a zeolitic material according to any one of embodiments 1 to 15 or 18 to 33. Reaction according to step (ii)
- the mass ratio hydrogen peroxide: zeolitic material of the framework MWW at the beginning of the reaction according to (ii) in the range of 10: 1 to 0, 1: 1, preferably from 1: 1 to 0 , 2: 1, more preferably from 0.75: 1 to 0.25: 1.
- reaction according to (ii) can generally be carried out according to all suitable process procedures.
- the implementation of the reaction according to (ii) in a discontinuous procedure is not subject to any particular restriction.
- a suitable reactor for the reaction according to (ii) for example, a reactor equipped with suitable heating means, a suitable stirrer and a reflux condenser can be used.
- the reaction according to (ii) is preferably carried out in an open system.
- the reaction according to (ii) is carried out with suitable agitation of the reaction mixture such as, for example, stirring, wherein the energy input by the agitation during the reaction can be kept substantially constant or changed.
- the energy input can be suitably selected depending on, for example, the volume of the reaction mixture, the form of the catalyst or the reaction temperature.
- the catalyst used in (ii) is preferably a zeolitic material with framework structure MWW as described above in embodiments 1 to 15 and 18 to 33.
- a fixed-bed catalyst is preferably used in the context of the continuous mode of operation, as catalyst (ii) preferably a shaped body as described above in embodiments 16, 17 and 34 to 36, containing the zeolitic material with framework structure MWW and preferably at least one binder material, preferably silica, used.
- the catalyst loading is preferably in the range of 0.05 to 5 mol / kg / h, more preferably from 0.1 to 4 mol / kg / h, further preferably from 0.2 to 3 mol / kg / h, wherein the catalyst loading is defined as mol (hydrogen peroxide) / kg (zeolitic material of the framework MWW) / h.
- the mixture according to (i) is preferably provided as a liquid stream which is passed into the one or more reactors where it is subjected to the reaction conditions according to (ii).
- the individual components of the mixture according to (i) in the form of two or more streams, which may contain the individual components or mixture thereof, in the one or more reactors, where the individual streams are merged after the reactor inlet to the mixture according to (i).
- two or more can be connected in parallel and / or two or more connected in series.
- One or more intermediate stages can be provided between two reactors connected in series, for example for intermediate removal of desired product.
- one or more of the starting materials cyclohexene, alcohol R 1 OH, hydrogen peroxide and optional solvent can be fed between two series-connected reactors.
- the reaction according to (ii) can be carried out using one or more catalysts different from one another and comprising a zeolitic material of the framework MWW and containing B and Ti in the framework.
- the catalysts may differ, for example, with regard to the chemical composition or the manner of preparation of the zeolitic material of the framework MWW.
- the catalysts, moldings should be used, for example, with respect to the properties of the molding, eg by the geometry of the molding, the porosity of the molding, the binder content of the molding, the binder material or the content of zeolitic material of the framework MWW differ.
- the reaction according to (ii) is preferably carried out in the presence of a single catalyst according to the invention.
- the catalyst used is separated from the mixture containing the compound of formula (I). If the reaction is carried out in a continuous procedure, for example in a fixed bed reactor, separation of the catalyst can be dispensed with, since the reaction mixture leaves the reactor and the catalyst remains in the fixed bed reactor.
- the catalyst which is preferably used in the form of a powder, can be separated by a suitable separation method, for example filtration, ultrafiltration, diafiltration, centrifugation and / or decantation.
- the separated catalyst may be subjected to one or more washing steps with one or more suitable washing liquids.
- washing liquids which may be mentioned are water, ethers, such as dioxane, for example 1,4-dioxane, alcohols, for example methanol, ethanol, propanol, or a mixture of two or more thereof. Dioxanes are preferably used as washing liquid.
- the washing step is preferably carried out at a temperature in the range of 10 to 50 ° C, more preferably 15 to 40 ° C, further preferably 20 to 30 ° C.
- the catalyst suitable for regeneration for example by washing with one or more suitable detergents, or by drying in one or more suitable atomic spheres, at one or more suitable temperatures and at one or more suitable pressures, or by calcination in one or more suitable atomic spheres, at one or at several suitable temperatures and at one or more suitable pressures, or by a combination of two or more of these measures, each of which may be carried out once or more times within one or more suitable time periods.
- the reaction according to (ii) is preferably carried out at a temperature of the reaction mixture in the range from 40 to 150.degree. C., more preferably from 50 to 125.degree. C., more preferably from 55 to 100.degree.
- the reaction according to (ii) is preferably carried out, if the reaction is carried out batchwise, for example as a batch reaction, at the boiling point of the liquid mixture, more preferably under reflux.
- the duration of the reaction according to (ii), the reaction should be carried out batchwise, for example as a batch reaction, in the range of 1 to 12 h, more preferably from 1, 5 to 10 h, more preferably from 2 to 8 h ,
- the term "at the beginning of the reaction” generally refers to the time at which all starting materials, including the catalyst, are present simultaneously in the reaction mixture and, depending on the temperature, the reaction of the
- the term "at the beginning of the reaction” generally refers to the time at which the mixture provided according to (i) contacts the catalyst.
- the molar content of the mixture obtained from the reaction according to (ii) on the compound of the formula (I), based on the sum of the molar contents of the mixture obtained from the reaction according to (ii), of the compounds of the formulas (I) is preferably (II), (III), (IV) and (V)
- each of the compounds (II), (III), (IV) and (V) is present in the mixture obtained according to (ii); Rather, the mixture obtained according to (ii), besides the compound (I), may contain only one, only two, only three or all four of the compounds (II), (III), (IV) and (V).
- the mixture obtained in (ii) containing the compound of the formula (I) is preferably worked up to separate the compound of the formula (I). If the conversion of hydrogen peroxide is not complete during the reaction, it is preferable to remove the unreacted hydrogen peroxide present in the mixture before workup, for example by decomposing it by adding suitable substances.
- tertiary amines, polyamines, salts of heavy metals such as iron, manganese, cobalt and vanadium, sulfinic acids, mercaptans, dithionites, sulfites and strong acids and bases are suitable for the decomposition of the excess hydrogen peroxide.
- the decomposition of the excess hydrogen peroxide is preferably carried out by means of an alkali metal or alkaline earth metal sulfite, more preferably alkali metal sulfite, more preferably sodium sulfite.
- the mixture obtained according to (ii) comprising the compound of the formula (II) is worked up by
- the separation according to (iii) is preferably carried out when, in the mixture obtained according to (ii), the compounds of the formulas (I) and (II) and optionally at least one of the compounds according to the formulas (III), (IV) and ( V) contains
- the molar content of the mixture of the compound of the formula (II) based on the sum of the molar contents of the mixture of the compounds of the formulas (II), (III), (IV) and (V) at least 70%, more preferably at least 75 %, more preferably at least 80%.
- the mixture depleted in the compound of the formula (II) and obtained according to (iii) has a molar content of the compound of the formula (I) relative to the sum of the molar contents of the mixture of the compounds of the formulas (I), (II) , (III), (IV) and (V) of at least 90%, more preferably at least 95%.
- the separation according to (iii) is not subject to any restrictions in principle and can be carried out by any suitable separation method such as, for example, distillation, sublimation, chromatography, crystallization or a combination of the abovementioned separation methods.
- Another possible workup includes the
- the compound of the formula (I) can subsequently be separated from the mixture resulting therefrom.
- the separation according to (iv) is in principle subject to no restriction and can be carried out by any customary separation method such as, for example, distillation, sublimation, chromatography, crystallization or a combination of the abovementioned separation methods.
- the compound of formula (I) is separated by distillation from the mixture obtained from (ii) or (iii), wherein the distillation is in principle subject to no restriction. It is preferred that the separation according to (iv) is carried out by means of distillation at a bottom temperature of 25 to 200 ° C, more preferably 30 to 150 ° C and a pressure of 5 to 1500 mbar, more preferably 10 to 1300 mbar,
- the mixture obtained by the separation according to (iv) concentrated with respect to the compound of the formula (I) has a content of the compound of the formula (I) of preferably at least 90% by weight, more preferably at least 95% by weight.
- the present invention therefore preferably relates to a process for the preparation of a compound of the formula (I)
- R 1 is an alkyl radical having 1 to 4 carbon atoms, obtainable or obtainable by the process according to the invention, the molar content of the mixture being based on the compound of the formula (I) based on the sum of the molar contents of the mixture of the compounds of the formulas (I) , (II), (III), (IV) and (V)
- the mixture according to the invention is depleted by the above-described separation according to (iii) on the compound of formula (II).
- the present invention relates to a use of the mixture according to the invention comprising a compound of the formula (I) for preparing a compound of the formula (VI)
- Ri is an alkyl group having 1 to 4 carbon atoms as defined above.
- Ri is an alkyl group having 1 to 4 carbon atoms, comprising
- the backbone of the zeolite according to (ii) contains silicon, titanium, boron, oxygen and hydrogen.
- liquid mixture provided according to (i) contains a solvent, preferably selected from the group consisting of C 1 -C 6 -alkylamines, dialkyl ketones of the formula R 2 -CO R 3 , wherein R 2 and R 3 are each independently selected from the group consisting of C 1 -C 6 alkyl, and a mixture of two or more thereof, more preferably from the group consisting of C 1 -C 3 alkynitriles, dialkyl ketones of formula R 2 -CO-R 3 , wherein R 2 and R 3 are each independently selected from the group consisting of C 1 -C 3 alkyl, and a mixture of two or more thereof, more preferably selected from the group consisting of acetonitrile, acetone and a mixture from that.
- a solvent preferably selected from the group consisting of C 1 -C 6 -alkylamines, dialkyl ketones of the formula R 2 -CO R 3 , wherein R 2 and R 3 are each independently selected from the group consisting
- the zeolite of the framework MWW prepared or prepared according to a method comprising (a) providing an aqueous synthesis mixture comprising a silicon source, a boron source, a titanium source and a MWW template compound, wherein the
- Temperature of the aqueous synthesis mixture is at most 50 ° C;
- Ri is an alkyl group having 1 to 4 carbon atoms, obtainable or obtained by a process according to any of embodiments 1 to 20, wherein the molar content of the mixture of the compound of the formula (I) based on the sum of the molar contents of the mixture of the Compounds of the formulas (I), (II), (II I), (IV) and (V)
- the 11 B solid-state NMR experiments were performed using a Bruker Avance II I 400 MHz 1 H Larmor frequency spectrometer (Bruker Biospin, Germany). The samples were stored in 4 mm Zr0 2 rotors at 63% relative humidity at room temperature prior to packaging. Measurements were performed at 10 kHz room temperature magic angle spinning, and the 11 B spectra were measured using an 11 B 15 ° excitation pulse of 1 microsecond ( ⁇ s) pulse width, 11 B carrier frequency, which corresponds to -4 ppm in the referenced spectrum, and a scan waiting time ("scan-recycle delay") of 1 s. The signals were acquired for 10 ms and accumulated with 5000 scans.
- the spectra were processed over the entire spectrum width using a Bruker topspin with 30 Hz exponential line broadening, phase control, and baseline correction.
- the spectra were calculated using glycine with a carbonyl peak at 175.67 ppm as a secondary standard versus 1% TMS in CDCl 3 on the unified chemical shift scale according to I UPAC (Pure Appl Chem, Vol. 80, No. 1, p. 59).
- the 29 Si solid-state NMR experiments were performed using a Bruker Advance II I spectrometer with 400 MHz 1 H Larmor frequency (Bruker Biospin, Germany). The samples were stored in 4 mm Zr0 2 rotors at 63% relative humidity at room temperature prior to packaging. Measurements were performed at 10 kHz room temperature magic angle spinning, and the 29 Si spectra were measured using a 29 Si 90 ° exciter pulse of 5 microseconds ( ⁇ ) pulse width, a 29 Si Carrier frequency, which corresponds to -1 12 ppm in the referenced spectrum, and a scan waiting time ("scan-recycle delay") of 120 s.
- ⁇ microseconds
- the water adsorption / desorption isotermes were run on a TA Instruments VTI SA apparatus which performs a stepwise isotherm program.
- the experiment consisted of a run or series of runs performed on a sample material placed on the microbalance dish in the apparatus. Before starting the measurement, the residual moisture of the sample was removed by heating the sample to 100 ° C (heating rate 5 K / min) and kept under nitrogen flow for 6 hours. After the drying program, the temperature in the cell was reduced to 25 ° C and kept isothermal during the measurement. The microbalance was calibrated and the weight of the dried sample was adjusted (maximum mass deviation 0.01% by weight). Water uptake by the sample was measured as the increase in weight over the dry sample.
- an adsorption curve was measured by increasing the relative humidity (expressed as weight% of water in the atmosphere of the cell) to which the sample was exposed, and measuring the water absorption of the sample as equilibrium.
- the relative humidity was increased in increments of 10% by weight from 5% to 85% by weight and at each step the system controlled the relative humidity and monitored the sample weight until equilibrium conditions were reached after the sample was 85% by weight. to 5% by weight relative humidity in 10% by weight increments, and the change in the weight of the sample (water uptake) was monitored and recorded.
- the spectra were obtained in a graph with wavelength (cm" 1) on the X-axis and the absorbance (arbitrary units or "arbitrary units", abbreviated au) is shown.
- baseline correction was performed on peak heights and ratios between these peaks, changes in the range of 3000 - 3900 cm -1 were analyzed, and for comparison of several samples, the band at 1880 ⁇ 5 cm -1 was used as a reference.
- Example 1 Preparation of a zeolite of the framework MWW containing boron
- the mixture had a pH of 11.3.
- the mixture was transferred to a 2.5 liter autoclave and slowly heated to 170 ° C over 10 hours at a heating rate of about 0.2 K / min, and then this temperature was stirred for 160 hours at a stirring speed of 100 U / min held.
- the pressure during the reaction ranged from 8.3 to 9 bar.
- the suspension obtained had a pH of 1 1, 2 on.
- the suspension was filtered and the filter cake was washed with deionized water until the washings had a pH of less than 10.
- the filter cake was dried in a drying oven at 120 ° C for 48 hours, and heated at a heating rate of 2 K / min to a temperature of 650 ° C and calcined for 10 h at 650 ° C in an air atmosphere.
- a colorless powder (101.3 g) was obtained.
- the powder had a boron content of 1.3% by weight, calculated as elemental boron, a titanium content of 1.3% by weight, calculated as elemental titanium, and a silicon content of 40% by weight, calculated as elemental silicon ,
- the total content of hydrocarbons was 0.1% by weight.
- the water absorption determined according to Reference Example 3 was 13.7% by weight.
- the 11 B solid-state NMR spectrum of the zeolitic material is shown in FIG.
- the 29 Si solid-state NMR spectrum of the zeolitic material is shown in FIG.
- the FT-IR spectrum of the zeolitic material is shown in FIG.
- the X-ray diffraction spectrum of the zeolitic material is shown in FIG.
- the X-ray diffraction spectrum of the zeolitic material further has the following characteristics:
- Comparative Example 1 Preparation of a Ti-Al Beta Zeolite Based on M.A.
- Ti-AI-beta zeolite was prepared according to MA Uguina et al., J. Chem. Soc, Chem. Commun., 1994, page 27, as in EC Derouane et al., "Titanium-substituted zeolite beta:” efficient catalyst in the oxy-functionalization of cyclic alkenes using hydrogen peroxide in organic solvents ", New J. Chem., 1998, pp. 797-799, cited.
- Aerosil 200 131, 20 g
- Run 3 Run 2 was transferred to Run 1 and stirred for 15 min.
- the liquid gel had a pH of 13.8 and was placed in an autoclave for crystallization. Within one hour, the temperature in the autoclave was brought to 135 ° C and held there under autogenous pressure for 72 h with stirring at 100 U / min. After 72 h, the resulting suspension having a pH of 12.2 was drained and adjusted to a pH in the range of 7-8 by means of 10% by weight HN0 3 (300 g), filtered through a suction filter and treated with 10 liters of VE reagent. Washed water.
- the moist product (filter cake) was placed in a porcelain dish, dried at 120 ° C for 10 h in air and then calcined at 580 ° C for 4 h in air.
- the weight of dried product was 154 g and calcined 126 g.
- Deionized water (470 kg) was placed in a reactor. With stirring at 70 rpm, boric acid (163 kg) was suspended in the water. The suspension was stirred for 3 h. Then, piperidine (273 kg) was added and the mixture was stirred for an additional 1 hour. To the mixture was added colloidal silica (Ludox® AS-40, 392 kg) and the resulting mixture was stirred at 70 rpm for an additional 1 hour. The resulting mixture was transferred to a crystallization reactor and heated to 170 ° C over 5 hours under autogenous pressure with stirring at 50 rpm. The temperature of 170 ° C was kept substantially constant for 120 hours, during which the mixture was stirred at 50 rpm for 120 hours.
- the B-MWW-containing suspension had a pH of 1 1, 3, which was determined by measurement by means of a pH electrode. From this suspension, the B-MWW was separated by filtration using a suction filter. The filter cake was then washed with deionized water until the wash water had a conductivity of less than 500 microSiemens / cm. The filter cake thus obtained was subjected to spray drying in a spray tower under the following conditions:
- top component of the nozzle Manufacturer Gerig; Size: 0 Nozzle gas temperature: room temperature
- Filter material Nomex needle felt 20 m 2
- the spray tower consisted of a vertically arranged cylinder with a length of 2,650 mm and a diameter of 1,200 mm, the cylinder being conically constricted at the bottom.
- the length of the cone was 600 mm.
- the atomizing means a two-component nozzle
- the spray-dried material was separated from the drying gas in a filter located downstream of the spray tower, and the drying gas was then passed through a scrubber.
- the suspension was passed through the inner opening of the nozzle and the nozzle gas was passed through an annular slot surrounding the opening.
- the spray-dried material was then subjected to calcination at 650 ° C in a rotary calciner at a rate of 0.5-1.0 kg / hr.
- the calcined material had a boron content of 1.4% by weight, a silicon content of 42% by weight, and a total organic carbon content of 0.14% by weight.
- the determined by X-ray diffraction crystallinity was 83%, the BET surface area according to DIN 66131 462 m 2 / g, the determined by means of Ouecksilber porosimetry according to DIN 66133 pore volume 5.8 mL / g.
- the resulting deborated zeolite of the framework MWW was separated from the suspension by filtration at a nitrogen pressure of 2.5 bar and washed four times with deionized water. After filtration, the filter cake was dried for 6 hours in a stream of nitrogen. b) spray-drying the nitrogen-dried filter cake
- aqueous suspension with deionized water was prepared from the nitrogen-dried filter cake having a residual moisture content of 77% obtained according to section 2.2 a) above. This suspension was subjected to spray-drying in a spray tower under the following conditions:
- Pressure difference filter 6.0-10.0 mbar
- top component of the nozzle Manufacturer: Niro, diameter: 4 mm
- Filter material Nomex® needle felt 20 m 2
- the spray tower consisted of a vertically arranged cylinder with a length of 2,650 mm and a diameter of 1,200 mm, the cylinder being conically constricted at the bottom. The length of the cone was 600 mm.
- the atomizing means a two-component nozzle
- the spray-dried material was separated from the drying gas in a filter located downstream of the spray tower, and the drying gas was then passed through a scrubber.
- the suspension was passed through the inner opening of the nozzle and the nozzle gas was passed through an annular slot surrounding the opening.
- the spray-dried material had a boron content of 0.06% by weight, a silicon content of 42.5% by weight, and a total organic carbon content of ⁇ 0.2% by weight.
- the crystallinity determined by means of X-ray diffraction was 81%, the BET surface area in accordance with DIN 66131 476 m 2 / g, and the pore volume determined by means of mercury porosimetry according to DIN 66133 4.7 mL / g.
- a titanium-containing zeolite of the MWW skeleton structure was prepared as follows: The deborated zeolite of the MWW skeleton structure (80 kg) obtained according to Section 2.2 above was transferred to a first reactor A.
- Deionized water (225 kg) was transferred to a second reactor B and stirred at 100 rpm, and piperidine (174 kg) was added. During the addition, the temperature of the mixture was increased by about 15 ° C. Subsequently, tetrabutyl orthotitanate (16 kg) and deionized water (25 kg) were added. Stirring was continued for 60 minutes. The mixture of reactor B was then transferred to reactor A and stirred in reactor A at 70 rpm, and deionized water (110 kg) was charged to reactor A and the mixture was transferred from reactor A to reactor B. , After stirring at 70 rpm, the stirring rate was reduced to 50 rpm and the mixture in reactor B was heated to a temperature of 170 ° C. over 5 hours.
- the temperature of the mixture in reactor B was kept essentially constant at 170 ° C. under autogenous pressure for 120 h. Subsequently, the Ti-MWW-containing suspension was cooled to a temperature of less than 50 ° C within 5 hours. The resulting Ti-MWW zeolite was separated from the suspension by filtration under a nitrogen pressure of 2.5 bar and washed four times with deionized water. After filtration, the filter cake was dried for 6 hours in a stream of nitrogen. The obtained filter cake was diluted with water and subjected to spray-drying in a spray tower under the following conditions:
- Pressure difference filter 6.0-10.0 mbar
- top component of the nozzle Manufacturer: Niro, Diameter: 4
- Nozzle gas pressure 1, 5 bar
- Filter material Nomex® needle felt 20 m 2
- the spray tower consisted of a vertically arranged cylinder with a length of 2,650 mm and a diameter of 1,200 mm, the cylinder being conically constricted at the bottom. The length of the cone was 600 mm.
- the atomizing means a two-component nozzle
- the spray-dried material was separated from the drying gas in a filter located downstream of the spray tower, and the drying gas was then passed through a scrubber.
- the suspension was passed through the inner opening of the nozzle and the nozzle gas was passed through an annular slot surrounding the opening.
- the spray-dried material had a silicon content of 35% by weight, a titanium content of 2.4% by weight, a total organic carbon content (TOC) of 9.4% by weight, and a nitrogen content of 2.4 Weight% on.
- the Ti-MWW zeolite obtained according to section 2.3 above was subjected to an acid treatment described in section a) below and then dried according to the spray drying described in section b) below, and the spray-dried material is calcined as described in section c) below.
- Pressure difference filter 7,0-11, 0 mbar
- top component of the nozzle Manufacturer: Niro, Diameter: 4
- Nozzle gas flow rate 23 kg / h
- Filter material Nomex® needle felt 20 m 2
- the spray tower consisted of a vertically arranged cylinder with a length of 2,650 mm and a diameter of 1,200 mm, the cylinder being conically constricted at the bottom.
- the length of the cone was 600 mm.
- the atomizing means a two-component nozzle
- the spray-dried material was separated from the drying gas in a filter located downstream of the spray tower, and the drying gas was then passed through a scrubber.
- the suspension was passed through the inner opening of the nozzle and the nozzle gas was passed through an annular slot surrounding the opening.
- the spray-dried, acid-treated Ti-MWW material had a silicon content of 40% by weight, a titanium content of 1.5% by weight, and a total organic carbon content (TOC) of 1.8% by weight. c) calcining the spray-dried material obtained according to section 1.4 b).
- the spray-dried material was then subjected to calcination at 650 ° C in a rotary calciner at a rate of 0.8-1.0 kg / hr.
- the calcined material had a silicon content of 41% by weight, a titanium content of 1.6% by weight, and a total organic carbon content of 0.19% by weight.
- the BET surface area according to DIN 66131 was 438 m 2 / g.
- the pore volume determined by means of mercury porosimetry according to DIN 66133 was 6.3 ml / g.
- the determined by X-ray diffraction crystallinity was 82%.
- Example 2 Process for the preparation of 2-alkoxycyclohexanol
- Example 1 and Comparative Examples 1 and 2 were used as catalysts in the reaction of cyclohexene with hydrogen peroxide to produce 2-methoxycyclohexanol. Further, the zeolites obtained in Example 1 and Comparative Example 2 were used as a catalyst in the reaction of cyclohexene with hydrogen peroxide to produce 2-ethoxycyclohexanol.
- the preparation of 2-methoxy- or 2-ethoxycyclohexanol was carried out as follows: In a reaction vessel, 1.00 g of the respective zeolitic material with 3.92 g of cyclohexene in 20 ml of methanol (see # I to # II and # IV to # VII in Table 1 below) or 20 ml of ethanol (compare #A and # B in Table 2 below). In experiment # III according to Table 1, 0.5 g of the respective zeolitic material was used.
- R-i methyl or ethyl
- the catalyst according to the invention containing a zeolitic material of the framework MWW, which contains zeolite framework B and Ti, with the same reaction time, a significantly higher selectivity than the catalysts of Comparative Examples 1 and 2. This results directly from the Comparison of # I with # IV and # VI and comparison of # II with # V and # VII.
- FIG. 1 shows the 11 B solid-state NMR spectrum of the zeolite according to Example 1, measured according to Reference Example 1.
- the X axis shows the 11 B chemical shift (in ppm), the Y axis the intensity (FIG. * 10 6 ).
- the scale markings on the X axis are, from left to right, at 40, 20, 0, -20.
- the scale markings on the Y axis are, from bottom to top, at 0, 1, 2, 3, 4.
- FIG. 2 shows the 29 Si solid-state NMR spectrum of the zeolite according to Example 1, measured according to Reference Example 2.
- the X-axis shows the 29 Si chemical shift (in ppm), and the Y axis shows the intensity (FIG. * 10 6 ).
- the scale line marks on the X axis are, from left to right, at -90, -100, -1, 10, -120, -130.
- the scale markings on the Y axis are, from bottom to top, at 0, 20, 40, 60, 80, 100.
- FIG. 3 shows the FT-IR spectrum of the zeolite according to Example 1, measured according to Reference Example 4.
- the x-axis shows the wavelength (in cm -1 ) and the extinction on the y-axis
- the X-axis are, from left to right, at 4000, 3500, 3000, 2500, 2000, 1500.
- the scale line marks on the Y-axis are, from bottom to top, at 0.00, 0.01, 0 , 02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0, 11, 0, 12, 0.13, 0.14 , 0.15, 0.16, 0.17, 0.18,
- the wavenumbers given in each peak are in cm -1 , from left to right, 3748, 3719, 3689, 3623, 3601, 3536, 1872.
- the X-axis shows the degree values (2 theta), the y-axis shows the intensity (Lin (counts )).
- the scale markings on the X-axis are, from left to right, at 2, 10, 20, 30, 40, 50, 60, and 70.
- the scale line marks on the Y-axis are, from bottom to top, at 0 and 3557.
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Abstract
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JP2017532209A JP2017527620A (ja) | 2014-09-09 | 2015-09-08 | 2−アルコキシシクロヘキサノールの調製方法 |
US15/509,228 US20170275225A1 (en) | 2014-09-09 | 2015-09-08 | Method for the preparation of 2-alkoxy cyclohexanol |
EP15762969.2A EP3191439A1 (de) | 2014-09-09 | 2015-09-08 | Verfahren zur herstellung von 2-alkoxycyclohexanol |
MX2017003131A MX2017003131A (es) | 2014-09-09 | 2015-09-08 | Metodo para la preparacion de 2-alcoxi ciclohexanol. |
CN201580048167.8A CN106687433A (zh) | 2014-09-09 | 2015-09-08 | 制备2‑烷氧基环己醇的方法 |
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US10160931B2 (en) | 2014-09-26 | 2018-12-25 | Basf Se | Use of isomerically pure or highly isomer-enriched cis- or trans-(2-isobutyl-4-methyl-tetrahydropyran-4-yl)acetate |
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CN107735392B (zh) | 2015-05-04 | 2021-12-03 | 巴斯夫欧洲公司 | 制备甜瓜醛的方法 |
BR112018000481B1 (pt) | 2015-07-10 | 2022-01-11 | Basf Se | Processos para preparação de compostos e de (-)- ambrox (v) |
US10308580B2 (en) | 2015-07-15 | 2019-06-04 | Basf Se | Process for preparing an arylpropene |
JP2018522009A (ja) | 2015-07-15 | 2018-08-09 | ビーエーエスエフ ソシエタス・ヨーロピアBasf Se | アリールプロペンの調製方法 |
BR112018000606B1 (pt) | 2015-07-22 | 2022-01-18 | Basf Se | Processo para preparação de ácido furan-2,5- dicarboxílico e uso de um catalisador |
EP3170828A1 (de) | 2015-11-23 | 2017-05-24 | Basf Se | Verfahren zur herstellung von verbindungen mit 16-oxabicyclo[10.3.1]pentadecengerüst und deren folgeprodukten |
EP3178788A1 (de) | 2015-12-08 | 2017-06-14 | Basf Se | Zinnhaltiges zeolithmaterial mit einer bea-rahmenstruktur |
JP7039472B2 (ja) | 2015-12-08 | 2022-03-22 | ビーエーエスエフ ソシエタス・ヨーロピア | Bea骨格構造を有するスズ含有ゼオライト材料 |
US10618873B2 (en) | 2016-02-01 | 2020-04-14 | Basf Se | Method for producing C4-C15 lactams |
CN109195959B (zh) | 2016-05-31 | 2023-08-18 | 巴斯夫欧洲公司 | 四氢吡喃基低碳烷基酯和其使用烯酮化合物的制备 |
JP7039498B2 (ja) | 2016-06-29 | 2022-03-22 | ビーエーエスエフ ソシエタス・ヨーロピア | 液相の存在下でのアルコールの酸化によるアルファ,ベータ不飽和アルデヒドの製造方法 |
JP6986063B2 (ja) | 2016-07-08 | 2021-12-22 | ビーエーエスエフ ソシエタス・ヨーロピアBasf Se | 有機スルホンの製造方法 |
BR112018077067B1 (pt) | 2016-07-15 | 2022-05-31 | Basf Se | Processo para preparar um composto |
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US20110190517A1 (en) * | 2010-02-01 | 2011-08-04 | Mandimutsira Beaven S | Process for making titanium-MWW zeolite |
WO2014016146A1 (fr) * | 2012-07-26 | 2014-01-30 | Rhodia Operations | Procede de preparation d'alkoxyphenol et d'alkoxyhydroxybenzaldehyde |
CN103709018A (zh) * | 2014-01-07 | 2014-04-09 | 万华化学集团股份有限公司 | 一种愈创木酚的制备方法 |
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US20110190517A1 (en) * | 2010-02-01 | 2011-08-04 | Mandimutsira Beaven S | Process for making titanium-MWW zeolite |
WO2014016146A1 (fr) * | 2012-07-26 | 2014-01-30 | Rhodia Operations | Procede de preparation d'alkoxyphenol et d'alkoxyhydroxybenzaldehyde |
CN103709018A (zh) * | 2014-01-07 | 2014-04-09 | 万华化学集团股份有限公司 | 一种愈创木酚的制备方法 |
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US10160931B2 (en) | 2014-09-26 | 2018-12-25 | Basf Se | Use of isomerically pure or highly isomer-enriched cis- or trans-(2-isobutyl-4-methyl-tetrahydropyran-4-yl)acetate |
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