WO2022164121A1 - 이종금속 수소화 촉매의 제조 방법 - Google Patents
이종금속 수소화 촉매의 제조 방법 Download PDFInfo
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- 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
- C07C29/132—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
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- C07C29/147—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of carboxylic acids or derivatives thereof
- C07C29/149—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of carboxylic acids or derivatives thereof with hydrogen or hydrogen-containing gases
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- C07C35/02—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a ring other than a six-membered aromatic ring monocyclic
- C07C35/08—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a ring other than a six-membered aromatic ring monocyclic containing a six-membered rings
- C07C35/14—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a ring other than a six-membered aromatic ring monocyclic containing a six-membered rings with more than one hydroxy group bound to the ring
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- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
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- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
Definitions
- the present invention relates to a method for producing a heterogeneous metal hydrogenation catalyst, and more specifically, when the hydrogenation catalyst is reduced under appropriate reducing conditions using a specific reducing gas, the hydrogenation reaction of the catalyst is improved.
- the heterogeneous hydrogenation catalyst can be prepared in the order of reduction and passivation after the active metal is supported and dried.
- catalyst activation in which an active metal component in the form of a supported metal compound is reduced to metal must be accompanied.
- Activation of the catalyst can be used by reducing the active metal component before the reaction using a slurry reduction method and a thermal reduction method.
- NaBH 4 having a high hydrogen content is characterized in that it is hydrolyzed in an aqueous solution to generate hydrogen, thereby reducing a metal compound.
- Na, B, etc. generated after hydrolysis of NaBH 4 may act as catalyst poisons due to strong bonding to metals, thereby reducing catalyst activity.
- dry reduction is a method of reducing a metal salt to a metal by supplying a reducing gas to the sample in a state of mainly applying heat.
- Hydrogen, carbon dioxide, carbon monoxide, methane, etc. are used as a reducing agent, and hydrogen gas is mainly used
- Concentrated hydrogen at a specific mixing ratio with air has a risk of deflagration or explosion. Therefore, for safe operation in commercial processes, it is common to use a composition of about 2 to 10% based on hydrogen as a mixture of hydrogen and an inert gas.
- the present inventors while researching to solve the above problems, when reducing the heterogeneous metal hydrogenation catalyst under appropriate reducing conditions using a specific reducing gas, using the hydrogenation catalyst efficiently dicarboxylic acid functional group ( The present invention was completed by discovering that a dicarboxylic acid group can be converted into a dialcohol group.
- the present invention has been devised to solve the problems of the prior art, and an object of the present invention is to provide a method for reducing a heterogeneous metal hydrogenation catalyst.
- an object of the present invention is to provide a method for preparing cyclohexane dimethanol (CHDM) using the activated heterometal hydrogenation catalyst.
- an aspect of the present invention is,
- the heterogeneous metal compound includes a first metal and a second metal
- the first metal includes a compound of a metal selected from the group consisting of Ru, Pt, Pd, Rh, and combinations thereof
- the second metal may include a compound of a metal selected from the group consisting of Sn, Fe, Ga, Re, and combinations thereof.
- the molar ratio of the first metal and the second metal may be 1: 0.5 to 3.
- the carrier may include a material selected from the group consisting of silica (SiO 2 ), alumina (Al 2 O 3 ), zirconia (ZrO 2 ), titania (TiO 2 ), carbon, and combinations thereof. have.
- the carbon may include a material selected from the group consisting of activated carbon, carbon black, graphite, graphene, ordered mesoporous carbon (OMC), carbon nanotubes (CNT), and combinations thereof.
- activated carbon carbon black, graphite, graphene, ordered mesoporous carbon (OMC), carbon nanotubes (CNT), and combinations thereof.
- OMC ordered mesoporous carbon
- CNT carbon nanotubes
- the content of the heterogeneous metal may be 1 to 20 parts by weight based on 100 parts by weight of the carrier.
- the temperature increase may be performed at a rate of 1°C/min to 15°C/min.
- the reduction may be performed in a kiln, a furnace, or a reactor of a fixed bed type, a fluidized bed type, a moving bed type, or a static box type.
- the reducing gas is selected from the group consisting of hydrogen (H 2 ), carbon monoxide (CO), carbon dioxide (CO 2 ), methane (CH 4 ), ammonia (NH 3 ), hydrogen sulfide (H 2 S), and combinations thereof It may contain gas.
- the supply amount of the reducing gas during the temperature increase may be equal to or more than the number of moles of the metal compound contained per unit mass of the catalyst precursor.
- the reduction method of the heterogeneous metal hydrogenation catalyst includes the steps of reducing the catalyst precursor while heating a reactor; Thereafter, the step of maintaining the temperature of the reactor; may further include.
- the temperature of the maintained reactor may be 200 °C to 500 °C.
- the temperature increase and maintenance of the reactor may be performed for 30 minutes to 24 hours.
- the heterometallic catalyst may be one used for the hydrogenation reaction.
- the hydrogenation reaction may be reduction of a carboxylic acid functional group, an aldehyde functional group, or a ketone functional group to an alcohol functional group.
- the hydrogenation reaction may be reduction of a dicarboxylic acid group to a dialcohol group.
- It provides a method for preparing cyclohexane dimethanol (CHDM) by performing a hydrogenation reaction of cyclohexane dicarboxylic acid (CHDA) using the activated heterometal catalyst.
- the yield of the prepared cyclohexane dimethanol (CHDM) may be 70% or more.
- the reduction method of the heterogeneous metal hydrogenation catalyst according to the present invention as described above, segregation, sintering and leaching of active metals that may occur in the process of reducing the heterogeneous metal compound to a metal Controllable, it is possible to obtain a heterogeneous metal hydrogenation catalyst supported with an active metal in an even alloy state (alloy status).
- the catalyst reduced through the reduction method of the heterogeneous metal catalyst may effectively reduce a dicarboxylic acid group to a dialcohol group.
- FIG. 1 is a photograph showing the results of STEM-EDX analysis of a heterogeneous metal catalyst according to an embodiment of the present invention.
- FIG. 2 is a photograph showing the results of STEM-EDX analysis of a dissimilar metal catalyst according to a comparative example of the present invention.
- the first aspect of the present application is a first aspect of the present application.
- the bimetallic hydrogenation catalyst has a close correlation with the catalytic activity depending on the purpose of the morphology, ratio, and uniformity of the active metal.
- the heterometal hydrogenation catalyst is a bifunctional catalyst in which the roles of different active metals are different, and a metal with high oxygen affinity (for example, Sn, Re, Ga, Fe, etc.) is intentionally alloyed with a noble metal. status) to induce electronic ensemble effects to effectively perform a hydrogenation reaction of a carboxylic acid group or a carbonyl group. Therefore, in order to obtain a catalyst having excellent catalytic activity, it is necessary to design an appropriate active metal (Appl. Catal. A-Gen. 318 (2007) 70-78).
- a reduction process in which a heterogeneous metal compound is reduced to a metal is required.
- a dry reduction method is used that raises the temperature while flowing a mixed gas containing hydrogen to the desired reduction temperature. can't When the temperature is rapidly raised to the target reduction temperature or the target reduction temperature is excessively high, the metal particles move or aggregate on the surface during reduction, resulting in particle growth (sintering), and the effective reaction surface area of the active metal participating in the reaction Adequate reducing conditions depending on the metal species are essential because they can be reduced (J. A. Anderson et al. “Supported Metals in Catalysis”, Imperial college press).
- the reduction method of the heterogeneous metal hydrogenation catalyst may include a step of charging a catalyst precursor supported on a carrier with a heterogeneous metal compound in a reactor;
- the heterogeneous metal compound may include a first metal and a second metal, wherein the first metal is a group consisting of Ru, Pt, Pd, Rh, and combinations thereof. It may include a compound of a metal selected from, and the second metal may include a compound of a metal selected from the group consisting of Sn, Fe, Ga, Re, and combinations thereof.
- the molar ratio of the first metal and the second metal may be 1: 0.5 to 3, preferably the same molar ratio, and more preferably provided in the same molar ratio after reduction. .
- the first metal and the second metal as an active metal may have a metal crystallite size of 1 nm to 20 nm, preferably 1 nm to 15 nm have. At this time, when the crystal size exceeds 20 nm, it is difficult to expect a high conversion rate.
- the carrier is from the group consisting of silica (SiO 2 ), alumina (Al 2 O 3 ), zirconia (ZrO 2 ), titania (TiO 2 ), carbon (Carbon), and combinations thereof. It may include a selected material, and may preferably include carbon. Meanwhile, the carbon may include a material selected from the group consisting of activated carbon, carbon black, graphite, graphene, ordered mesoporous carbon (OMC), carbon nanotubes (CNT), and combinations thereof.
- the volume ratio of mesopores having a pore size of 2 nm to 50 nm among all pores of the carbon may be 50% or more.
- the carbon in the carbon carrier has a volume ratio of mesopores in the total pores of 70% or more, and more preferably, the carbon in the carbon carrier has a volume ratio of mesopores in the total pores of 75% or more.
- the volume ratio of the mesopores is less than 50%, there may be a problem of the microscopic mass transfer rate in the carbon carrier of the reactant and the product, and when the average size of the pores is more than 50 nm, the physical strength of the carrier is weak. Since there may be, the above range may be suitable.
- the carbon may include activated carbon having a specific surface area (BET) in the range of 100 m 2 /g to 1,500 m 2 /g.
- the carbon may include activated carbon having a specific surface area (BET) in the range of 200 m 2 /g to 1,000 m 2 /g.
- BET specific surface area
- the specific surface area of the carbon is less than 100 m 2 /g, there may be a problem of high dispersion of the active metal, and when the specific surface area of the carbon exceeds 1,500 m 2 /g, the ratio of mesopores is Since there may be a lowering problem, the above range may be suitable.
- the carbon carrier may include micropores in an appropriate ratio in addition to the medium-sized mesoporosity, and preferably, the volume ratio of micropores among all pores is 0 to 25 % may be. In this case, when the volume ratio of the micropores exceeds 25%, there may be a microscopic mass transfer rate problem in the carbon carrier of the reactants and products, so the above range may be suitable.
- the content of the heterogeneous metal may be 1 part by weight to 20 parts by weight based on 100 parts by weight of the carrier, and specifically, the content of the first metal is 1 part by weight based on 100 parts by weight of the carrier to 10 parts by weight, preferably 3 to 7 parts by weight.
- the content of the heterogeneous metal is less than 1 part by weight relative to 100 parts by weight of the carrier, the conversion efficiency of the reaction may be reduced or the selectivity of the target product may be lowered, so that the separation and recovery costs in the process may be excessively generated, and 20 parts by weight If the wealth is exceeded, an inefficient problem may occur due to the generation of high by-products.
- the hydrogenation catalyst may have an average particle size (d 50 ) of 3 ⁇ m to 50 ⁇ m.
- d 50 average particle size
- the catalyst passes through the filtration membrane and causes loss of the catalyst, which may cause cost problems due to product purity and catalyst loss. A problem in which the efficiency of the reaction decreases may occur.
- the active metal of the hydrogenation catalyst may form a uniform miscible phase.
- the heterogeneous active metal is, for example, ruthenium (Ru) and tin (Sn)
- Ru and Sn do not exist independently and may form a uniform mixed phase.
- the uniform composition of the metal in the heterometal hydrogenation catalyst has a correlation with the catalytic activity (J. Mol. Catal A Chem 2015, 410, 184). Therefore, in order to obtain excellent catalytic activity at the same metal loading, high uniformity between the two metals is essential.
- the first metal serves to adsorb hydrogen to produce a metal-hydride
- the second metal acts as a Lewis acid to polarize the carbonyl group.
- uniformity of the active phase of the heterometal is required for efficient carbonyl group reduction. Accordingly, the catalyst according to the present invention may provide a heterogeneous metal active phase having a uniform composition, thereby improving the efficiency of the reaction.
- the reduction method of the hydrogenation catalyst is to reduce the heterogeneous metal compound contained in the catalyst to a metal by increasing the temperature of the reactor and supplying a reducing gas at the same time.
- the reducing gas is hydrogen (H 2 ), carbon monoxide (CO), carbon dioxide (CO 2 ), methane (CH 4 ), ammonia (NH 3 ), hydrogen sulfide (H 2 S) and their It may include a gas selected from the group consisting of combinations, and preferably includes hydrogen (H 2 ) having a high reduction potential.
- the temperature increase may be performed at a rate of 1 °C/min to 15 °C/min, preferably 1 °C/min to 5 °C/min. If the temperature increase rate is less than 1 ° C / min, the heat treatment time to the target temperature is long and inefficient, and when it exceeds 15 ° C / min, the sintering phenomenon of the metal is accelerated due to the rapid heat source supply under insufficient reducing conditions. may occur.
- the reduction requires easy inflow and discharge of the reducing gas, and the supply of the reducing gas at the same time as the temperature rises. It is preferably carried out in a kiln, furnace or reactor.
- the supply amount of the reducing gas during the temperature rise may be equal to or more than the number of moles of the metal compound contained per unit mass of the heterogeneous metal hydrogenation catalyst.
- the supply amount of the reducing gas is less than the number of moles of the metal compound contained per unit mass of the heterogeneous metal hydrogenation catalyst or is not added, an alloy of the dissimilar metal is not formed in the heat treatment process during temperature rise and segregation may occur. , metal leaching out may occur, so that a catalyst of the desired design may not be obtained.
- insufficient reducing conditions may not effectively remove ligands and the like of the metal compound, thereby reducing reaction efficiency and causing side reactions.
- the reduction method of the hydrogenation catalyst comprises the steps of: reducing the heterogeneous metal compound by heating the reactor; Thereafter, the step of maintaining the temperature of the reactor; may further include.
- the temperature of the maintained reactor may be 200 °C to 500 °C, preferably 350 °C to 450 °C.
- the step of maintaining the temperature of the reactor after the temperature rise may be performed to complete the reduction of the heterogeneous metal hydrogenation catalyst.
- the reduction temperature is less than 200 °C, the ligand of the heterogeneous metal compound is insufficiently removed, and the metal is not completely reduced, which may cause side reactions. problems may arise.
- the temperature increase and maintenance of the reactor may be performed for 30 minutes to 24 hours. At this time, when the temperature and maintenance of the reactor, that is, the heat treatment time is less than 30 minutes, the reduction of the heterogeneous metal hydrogenation catalyst may not occur smoothly, and the improved reduction effect is not obtained even if it exceeds 24 hours, which is economically disadvantageous.
- the heterometal hydrogenation catalyst may be one used for the hydrogenation reaction.
- the hydrogenation reaction may be to reduce a carboxylic acid functional group, an aldehyde functional group, or a ketone functional group to an alcohol functional group, preferably reducing a dicarboxylic acid functional group to a dialcohol group. and, more preferably, cyclohexane dicarboxylic acid (CHDA) may be reduced with cyclohexane dimethanol (CHDM).
- CHDA cyclohexane dicarboxylic acid
- CHDM cyclohexane dimethanol
- the carboxylic acids having a carboxylic acid functional group include, for example, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, phthalic acid, isophthalic acid, terephthalic acid (terephthalic acid), formic acid, acetic acid, caproic acid, caprylic acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, maleic acid, adipic acid, sebacic acid, cyclo It may include a material selected from the group consisting of hexanecarboxylic acid, benzoic acid, and combinations thereof.
- the aldehydes having an aldehyde functional group include, for example, formaldehyde, propionaldehyde, n-butylaldehyde, isobutylaldehyde, valeraldehyde, 2-methylbutylaldehyde, 3-methylbutylaldehyde, 2,2-dimethylpropionaldehyde, capronaldehyde, 2-methylvaleraldehyde, 3-methylvaleraldehyde, 4-methylvaleraldehyde, 2-ethylbutylaldehyde, 2,2-dimethylbutylaldehyde, 3,3-dimethylbutyl It may include a material selected from the group consisting of aldehydes, caprylaldehyde, caprinaldehyde, glutaldialdehyde, and combinations thereof.
- the ketones having a ketone functional group include, for example, a substance selected from the group consisting of acetone, butanone, pentanone, hexanone, cyclohexanone, acetophenone, and combinations thereof. may be doing
- a method for producing cyclohexane dimethanol (CHDM) by performing a hydrogenation reaction of cyclohexane dicarboxylic acid (CHDA) using the reduced heterometal hydrogenation catalyst according to the first aspect of the present application provides
- CHDM cyclohexane dimethanol
- the hydrogenation reaction may be carried out at a temperature of 200 °C to 300 °C for 2 hours to 24 hours, and the pressure may be performed in the range of 50 bar to 150 bar.
- the hydrogenation reaction temperature of the CHDA is carried out in the range of 200 °C to 270 °C
- the pressure may be carried out in the range of 70 bar to 130 bar.
- the temperature is less than 180 °C, the reaction rate is not sufficient and may appear lower than the desired yield of CHDM, and if it exceeds 300 °C, side reactions such as decomposition of reactants and products may occur.
- the pressure is less than 50 bar, hydrogen participating in the reaction during the hydrogenation reaction of CHDA may not be sufficiently present in the solvent, thereby causing a problem that the reaction rate is lowered, and even if the hydrogenation reaction pressure exceeds 150 bar Since the abnormal reaction rate improvement effect is not obtained, it may be economically disadvantageous.
- the hydrogenation reaction temperature is 200° C. to 250° C.
- the reaction pressure is 80 bar to 110 bar
- the reaction time may be 2 hours to 6 hours.
- the yield of cyclohexane dimethanol (CHDM) to be prepared may be 70% or more, preferably 85% or more, and most preferably 95% or more. .
- the catalyst precursor was prepared by supporting Ru and Sn metals on a carbon carrier using incipient-wetness impregnation. After quantifying and dissolving a ruthenium compound (RuCl 3 ⁇ 3H 2 O) and a tin compound (SnCl 2 ⁇ 2H 2 O) in ultrapure water, the solution is simultaneously dropped on a carbon carrier drop-wise and stirred using a mortar and pestle. and impregnated (co-impregnation).
- Ru was supported in an amount of 5 parts by weight based on 100 parts by weight of the carbon carrier, and the amount of Sn was supported in the same mole number as Ru. Thereafter, the supported sample was dried in a drying oven at 100° C. for 12 hours to prepare a catalyst precursor in which a dissimilar metal of Ru—Sn was supported on carbon.
- the reduction of the catalyst precursor prepared in Preparation Example was performed in a fixed bed reactor.
- the reduction equipment was composed of a reactor equipped with a catalyst, a reactor heater for controlling the temperature of the sample, and a MFC (Mass flow controller) for controlling the flow rate of gas.
- the reduction of the catalyst was performed by using the PID-controller to increase the temperature of the sample to the target reduction temperature by program, and at the same time, by flowing a reducing gas to the reduction temperature, heat treatment was performed. At this time, 5% hydrogen gas (N 2 balance) was used as the reducing gas, and the temperature was raised to 350° C., which is the reduction temperature, at 5° C./min, and then maintained for 3 hours.
- the flow rate (F/W: H 2 -ml/min.g-Cat.) of hydrogen per unit mass of catalyst precursor input in the temperature raising step was adjusted and supplied, and the total amount of hydrogen input was as follows. Table 1 shows.
- the catalyst was cooled to room temperature while flowing nitrogen (F/W: 20 ml-N 2 /min.g-Cat.), and 3% oxygen/nitrogen mixed gas (F/W: 20ml/min.g) at room temperature. -Cat.) was flowed for 2 hours to passivate the catalyst.
- the reduction of the catalyst precursor was performed in the same manner as in Example 1, except that 100% pure hydrogen gas was used instead of 5% hydrogen gas as the reducing gas.
- Example 1 100% pure hydrogen gas was used instead of 5% hydrogen gas as the reducing gas, and reduction of the catalyst precursor was performed using the same method except that it was supplied only in the temperature increasing step.
- the catalyst precursor prepared in Preparation Example was heated to 350° C. at a temperature of 5° C./min and reduced for 3 hours. At this time, during the reduction process, pure hydrogen was supplied only during the temperature increase step (about 70 minutes), and was replaced with nitrogen gas in the maintenance step. After the reduction was completed, the catalyst was cooled to room temperature while flowing nitrogen (F/W: 20 ml-N 2 /min.g-Cat.), and 3% oxygen/nitrogen mixed gas (F/W: 20ml/min.g) at room temperature. -Cat.) was flowed for 2 hours to passivate the catalyst.
- nitrogen F/W: 20 ml-N 2 /min.g-Cat.
- oxygen/nitrogen mixed gas F/W: 20ml/min.g
- the reduction of the catalyst precursor was performed in the same manner as in Example 1, except that 100% pure nitrogen (N 2 ) gas was used instead of 5% hydrogen gas as the reducing gas.
- CHDM cyclohexane dimethanol
- CHDA cyclohexanedicarboxlyic acid
- This reaction was performed in a batch reactor made of acid-resistant titanium-lined stainless material with a maximum working pressure of 100 bar.
- CHDA as a reactant and the heterogeneous metal hydrogenation catalyst reduced in Examples and Comparative Examples were respectively injected into the reactor in a weight ratio of 3.75: 1, and distilled water was filled as a reaction solvent. At this time, the amount of the reactant relative to the solvent was fixed at 1.6 wt%.
- STEM-EDX Electronic Dispersive X-Ray spectroscopy mapping analysis results of catalysts (Examples 1 to 3) through which hydrogen was flowed during temperature increase are shown in FIG. 1 .
- the metals observed in the electron image were less than 5 nm in size, and the active components were evenly distributed on the carbon carrier.
- Table 1 shows the Sn/Ru atomic ratio constituting the active site analyzed from the EDX-mapping results. It could be confirmed that Sn/Ru was composed close to the input metal, and it was confirmed that the catalyst was prepared as originally planned.
- Figure 2 shows the results of STEM-EDX (Energy Dispersive X-Ray spectroscopy) mapping analysis of the catalysts (Comparative Examples 1 and 2) through which nitrogen was flowed while the temperature was raised.
- the metals observed from the electron image form partial agglomerates of 10 nm or larger, and they are Ru-dominant, and it can be confirmed that phase segregation occurs during reduction.
- the Sn/Ru ratio analyzed from the EDX-mapping result also showed that the Sn ratio was low, so that the catalyst was not prepared as designed.
- the amount of hydrogen input and catalytic activity (activity) according to the catalytic reduction conditions are shown in Table 1 as the CHDM yield.
- Catalysts to which hydrogen was added during reduction showed high CHDM yields of 70% or more, whereas catalysts to which nitrogen was added during temperature rise showed low CHDM yields.
- the activity of a heterogeneous metal catalyst is proportional to the amount of hydrogen that can participate in the reaction with Sn/Ru in an appropriate ratio constituting the active metal. Segregation or elution of Sn metal occurred.
- the reducing gas supplied during the temperature rise has a great effect on the effective reaction surface area of the active metal, such as the size and dispersion of active metal particles among the physical properties of the catalyst, and acts as an important factor in determining the activity of the catalyst in the CHDA conversion reaction. there was.
- the reduction method of the heterogeneous metal hydrogenation catalyst according to the present invention as described above, segregation, sintering and leaching of active metals that may occur in the process of reducing the heterogeneous metal compound to a metal Controllable, it is possible to obtain a heterogeneous metal hydrogenation catalyst supported with an active metal in an even alloy state (alloy status).
- the catalyst reduced through the reduction method of the heterogeneous metal catalyst may effectively reduce a dicarboxylic acid group to a dialcohol group.
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Abstract
Description
| 구분 |
Total F/Wa)
(mL/min.g-Cat.) |
Hydrogen F/W
(mL/min.g-Cat.) |
승온 과정중
수소 투입량 (mmol-H2/g-Cat.) |
유지 과정중
수소 투입량 (mmol-H2/g-Cat.) |
Sn/Ru
원자비 |
CHDM 수율
(%) |
| 실시예 1 | 20 | 1 | 14.4 | 7.4 | 1.02 | 86 |
| 실시예 2 | 20 | 20 | 57.5 | 148 | 1.04 | 86 |
| 실시예 3 | 20 | 20 | 57.5 | 0 | 1.10 | 72 |
| 비교예 1 | 20 | 0 | 0 | 0 | 0.42 | 0.8 |
| 비교예 2 | 20 | 20 | 0 | 147.8 | 0.86 | 26 |
Claims (18)
- 이종의 금속 화합물이 담체에 담지된 촉매 전구체를 반응기에 충전시키는 단계; 및상기 반응기를 승온하며, 동시에 환원가스를 공급하여 상기 촉매 전구체에 포함된 이종의 금속 화합물을 환원시키는 단계;를 포함하는 이종금속 수소화 촉매의 환원 방법.
- 제1항에 있어서,상기 이종의 금속 화합물은 제1 금속 및 제2 금속을 포함하는 것이고,상기 제1 금속은 Ru, Pt, Pd, Rh 및 이들의 조합들로 이루어진 군으로부터 선택되는 금속의 화합물을 포함하는 것이고,상기 제2 금속은 Sn, Fe, Ga, Re 및 이들의 조합들로 이루어진 군으로부터 선택되는 금속의 화합물을 포함하는 것인 이종금속 수소화 촉매의 환원 방법.
- 제2항에 있어서,상기 제1 금속 및 제2 금속의 몰비율은 1: 0.5 내지 3인 것인 이종금속 수소화 촉매의 환원 방법.
- 제1항에 있어서,상기 담체는 실리카(SiO2), 알루미나(Al2O3), 지르코니아(ZrO2), 티타니아(TiO2), 탄소(Carbon) 및 이들의 조합들로 이루어진 군으로부터 선택되는 물질을 포함하는 것인 이종금속 수소화 촉매의 환원 방법.
- 제4항에 있어서,상기 탄소(Carbon)는 활성탄, 카본블랙, 흑연, 그래핀, OMC(Ordered Mesoporous Carbon), 탄소나노튜브(CNT) 및 이들의 조합들로 이루어진 군으로부터 선택되는 물질을 포함하는 것인 이종금속 수소화 촉매의 환원 방법.
- 제1항에 있어서,상기 이종의 금속 함량은 상기 담체 100 중량부 대비 1 중량부 내지 20 중량부인 것인 이종금속 수소화 촉매의 환원 방법.
- 제1항에 있어서,상기 승온은 1℃/min 내지 15℃/min의 속도로 수행되는 것인 이종금속 수소화 촉매의 환원 방법.
- 제1항에 있어서,상기 환원은 Fixed bed type, Fluidized bed type, Moving bed type 또는 static box type의 kiln, furnace 또는 reactor에서 수행되는 것인 이종금속 수소화 촉매의 환원 방법.
- 제1항에 있어서,상기 환원가스는 수소(H2), 일산화탄소(CO), 이산화탄소(CO2), 메탄(CH4), 암모니아(NH3), 황화수소(H2S) 및 이들의 조합들로 이루어진 군으로부터 선택되는 가스를 포함하는 것인 이종금속 수소화 촉매의 환원 방법.
- 제1항에 있어서,상기 승온 중 환원가스의 공급량은 상기 촉매 전구체의 단위 질량당 포함된 금속 화합물의 몰수 이상인 것인 이종금속 수소화 촉매의 환원 방법.
- 제1항에 있어서,상기 이종 금속 수소화 촉매의 환원 방법은,반응기를 승온하며 상기 이종의 금속 화합물을 환원시키는 단계; 이후에,상기 반응기의 온도를 유지시키는 단계;를 더 포함하는 것인 이종금속 수소화 촉매의 환원 방법.
- 제11항에 있어서,상기 유지되는 반응기의 온도는 200℃ 내지 500℃인 것인 이종금속 수소화 촉매의 환원 방법.
- 제11항에 있어서,상기 반응기의 승온 및 유지는 30 분 내지 24 시간 동안 수행되는 것인 이종금속 수소화 촉매의 환원 방법.
- 제1항에 있어서,상기 촉매는 수소화 반응에 사용되는 것인 이종금속 수소화 촉매의 환원 방법.
- 제14항에 있어서,상기 수소화 반응은 카르복실산 작용기, 알데히드 작용기 또는 케톤 작용기를 알코올 작용기로 환원하는 것인 이종금속 수소화 촉매의 환원 방법.
- 제14항에 있어서,상기 수소화 반응은 디카르복실산 작용기(dicarboxylic acid group)를 디알코올 작용기(dialcohol group)로 환원하는 것인 이종금속 수소화 촉매의 환원 방법.
- 제1항에 따른 활성화된 이종금속 수소화 촉매를 이용하여 사이클로헥산 디카르복실산(cyclohexane dicarboxylic acid, CHDA)의 수소화 반응을 수행하여 사이클로헥산 디메탄올(cyclohexane dimethanol, CHDM)을 제조하는 방법.
- 제17항에 있어서,상기 제조되는 사이클로헥산 디메탄올(cyclohexane dimethanol, CHDM)의 수율은 70% 이상인 것인 사이클로헥산 디메탄올(cyclohexane dimethanol, CHDM)을 제조하는 방법.
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| JP2023544684A JP2024504416A (ja) | 2021-02-01 | 2022-01-19 | 異種金属水素化触媒の製造方法 |
| US18/263,724 US20240116045A1 (en) | 2021-02-01 | 2022-01-19 | Method for manufacturing bimetallic hydrogenation catalyst |
| CN202280012724.0A CN117015439A (zh) | 2021-02-01 | 2022-01-19 | 制造非均相金属氢化催化剂的方法 |
| EP22746148.0A EP4286052A4 (en) | 2021-02-01 | 2022-01-19 | PROCESS FOR PRODUCING A HETEROGENEOUS METAL HYDROGENATION CATALYST |
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| CN117015439A (zh) | 2023-11-07 |
| JP2024504416A (ja) | 2024-01-31 |
| KR20220110945A (ko) | 2022-08-09 |
| US20240116045A1 (en) | 2024-04-11 |
| EP4286052A1 (en) | 2023-12-06 |
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