Furfuryl alcohol hydrogenation catalyst, preparation method and application thereof, and preparation method of 1, 2-pentanediol

Abstract

The invention relates to the field of catalysts, in particular to a furfuryl alcohol hydrogenation catalyst, a preparation method and application thereof and a preparation method of 1, 2-pentanediol. The furfuryl alcohol hydrogenation catalyst provided by the invention comprises a carrier, an auxiliary agent embedded in the carrier and Cu nanoparticles loaded on the carrier, the carrier is Al2O3, the auxiliary agent is selected from MgO and / or TiO2, and the content of the Cu nanoparticles is 10wt%-30wt% based on the total mass of the furfuryl alcohol hydrogenation catalyst. When the furfuryl alcohol hydrogenation catalyst provided by the invention is used for catalyzing furfuryl alcohol to prepare 1, 2-pentanediol, the technological process is simple, the reaction process is controllable, continuous preparation of a 1, 2-pentanediol product can be realized, the product quality is excellent and stable, the furfuryl alcohol hydrogenation conversion rate reaches 99.9%, and the selectivity of the product 1, 2-pentanediol reaches 60%.

Description

Technical Field

[0001] The present invention relates to the field of catalysts, and in particular to a furfuryl alcohol hydrogenation catalyst, a preparation method and application thereof, and a preparation method of 1,2-pentanediol. Background Art

[0002] 1,2-Pentanediol is an important component of diol compounds and an important raw material for the synthesis of the systemic fungicide propiconazole.

[0003] The traditional process for preparing 1,2-pentanediol mostly adopts the valeric acid method or the pentanol method, but both methods have problems such as complex process, serious environmental pollution, difficulty in meeting product quality standards, and scarce product raw materials.

[0004] In recent years, more researchers have turned their attention to the process of preparing 1,2-pentanediol by hydrogenation of furfuryl alcohol, which has abundant raw material sources and low cost. This method is simple and has low equipment requirements, but currently most of them use kettle hydrogenation, which has a long reaction time and harsh reaction conditions. The low selectivity of 1,2-pentanediol product is the main problem currently faced.

[0005] CN104370702A discloses a method for preparing 1,2-pentanediol by liquid phase selective hydrogenolysis of furfuryl alcohol, using 73% Cu-3% B 2 O 2 -19%SiO 2 The catalyst has a pressure of 4 to 10 MPa, a temperature of 130 to 180°C, a reaction time of 1 to 18 hours, a furfuryl alcohol conversion rate of 87.8%, and a 1,2-pentanediol selectivity of 41.4%. This method uses non-metallic Cu as an active component and does not contain the toxic element chromium. It has good catalytic activity for pentanediol under mild conditions, but the reaction time is long, the catalyst activity and selectivity are low, and the yield of the target product pentanediol is low. Summary of the invention

[0006] The purpose of the present invention is to overcome the problem that the furfuryl alcohol hydrogenation catalyst in the prior art cannot achieve both high conversion rate and high selectivity when catalyzing the hydrogenation of furfuryl alcohol to prepare 1,2-pentanediol.

[0007] In order to achieve the above object, the present invention provides a furfuryl alcohol hydrogenation catalyst in a first aspect, comprising a carrier, an additive embedded in the carrier and Cu nanoparticles supported on the carrier, wherein the carrier is Al 2 O 3 , the auxiliary agent is selected from MgO and / or TiO 2 ,

[0008] Based on the total mass of the furfuryl alcohol hydrogenation catalyst, the content of the Cu nanoparticles is 10wt%-30wt%.

[0009] A second aspect of the present invention provides a method for preparing a furfuryl alcohol hydrogenation catalyst, comprising the following steps:

[0010] S1: mixing the carrier and the auxiliary salt solution and crystallizing them to obtain an intermediate;

[0011] S2: mixing the intermediate with a copper-containing solution to obtain a precursor;

[0012] S3: Under a hydrogen atmosphere I, reducing the precursor to obtain the furfuryl alcohol hydrogenation catalyst;

[0013] Wherein, in step S1, the carrier is Al 2 O 3 , the auxiliary element in the auxiliary salt solution is selected from Mg and / or Ti;

[0014] In step S2, the solid-liquid ratio of the intermediate to the copper-containing solution is 0.5 g / mL-0.7 g / mL, and the content of Cu element in the copper-containing solution is 0.8 mol / L-1.0 mol / L.

[0015] The third aspect of the present invention provides a furfuryl alcohol hydrogenation catalyst prepared by the method provided by the second aspect of the present invention.

[0016] The fourth aspect of the present invention provides use of the furfuryl alcohol hydrogenation catalyst provided by the first aspect or the third aspect of the present invention in catalyzing the hydrogenation of furfuryl alcohol to prepare 1,2-pentanediol.

[0017] The fifth aspect of the present invention provides a method for preparing 1,2-pentanediol, comprising the following steps: introducing a furfuryl alcohol solution into a reactor filled with a furfuryl alcohol hydrogenation catalyst under a hydrogen atmosphere II for hydrogenation reaction treatment to obtain 1,2-pentanediol;

[0018] Wherein, the furfuryl alcohol hydrogenation catalyst is the furfuryl alcohol hydrogenation catalyst provided by the first aspect or the third aspect of the present invention;

[0019] The solvent of the furfuryl alcohol solution is a polar solvent.

[0020] The technical solution provided by the present invention has at least the following technical effects:

[0021] (1) The furfuryl alcohol hydrogenation catalyst provided by the present invention has good catalytic effect, mild reaction conditions, and the furfuryl alcohol hydrogenation conversion rate reaches 99.9%, and the selectivity of the product 1,2-pentanediol can reach 60%;

[0022] (2) The inventors of the present invention have discovered through creative work that the alumina carrier modified with Mg and / or Ti not only promotes the high dispersion of active metal Cu nanoparticles on the carrier surface, but also promotes the preferential chain breaking of the CO bond away from the hydroxyl end of furfuryl alcohol, and Mg and / or Ti can limit the acidic substances in the carrier, inhibit the polymerization of furfuryl alcohol, and further improve the conversion rate of furfuryl alcohol hydrogenation and the selectivity of 1,2-pentanediol;

[0023] (3) The method for preparing the furfuryl alcohol hydrogenation catalyst provided by the present invention can prepare the furfuryl alcohol hydrogenation catalyst provided by the first aspect of the present invention, and the preparation process is simple, the cost is low, and it is suitable for industrial scale-up production and application, and has high economic efficiency;

[0024] (4) The method for preparing 1,2-pentanediol provided by the present invention has a simple process flow, a controllable reaction process, and can realize continuous preparation of 1,2-pentanediol products. The product quality is excellent and stable. The furfuryl alcohol hydrogenation conversion rate reaches 99.9%, and the selectivity of the product 1,2-pentanediol reaches 60%. DETAILED DESCRIPTION

[0025] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0026] As mentioned above, the first aspect of the present invention provides a furfuryl alcohol hydrogenation catalyst, comprising a carrier, an additive embedded in the carrier, and Cu nanoparticles supported on the carrier, wherein the carrier is Al 2 O 3 , the auxiliary agent is selected from MgO and / or TiO 2 ,

[0027] Based on the total mass of the furfuryl alcohol hydrogenation catalyst, the content of the Cu nanoparticles is 10wt%-30wt%.

[0028] According to some preferred embodiments of the present invention, based on the total mass of the furfuryl alcohol hydrogenation catalyst, the content of the Cu nanoparticles is 10 wt%-20 wt%.

[0029] According to some preferred embodiments of the present invention, the auxiliary agent is MgO or TiO 2 , wherein, based on the total mass of the furfuryl alcohol hydrogenation catalyst, the content of the auxiliary agent is 1wt%-20wt%.

[0030] According to some preferred embodiments of the present invention, the additives are MgO and TiO 2 , wherein, based on the total mass of the furfuryl alcohol hydrogenation catalyst, the content of MgO is 1wt%-20wt%, and the content of TiO 2 The content of furfuryl alcohol is 1wt%-20wt%. Under the preferred conditions, the conversion rate and selectivity of preparing 1,2-pentanediol by the furfuryl alcohol hydrogenation catalyst are higher.

[0031] More preferably, based on the total mass of the furfuryl alcohol hydrogenation catalyst, the content of MgO is 1wt%-15wt%, and the content of TiO 2 The content is 1wt%-15wt%.

[0032] According to some preferred embodiments of the present invention, the average specific surface area of ​​the furfuryl alcohol hydrogenation catalyst is 200m 2 / g-230m 2 / g, average pore volume 0.5g / cm 3 -0.7g / cm 3 Under the preferred conditions, the conversion rate and selectivity of the furfuryl alcohol hydrogenation catalyst for preparing 1,2-pentanediol are higher.

[0033] A second aspect of the present invention provides a method for preparing a furfuryl alcohol hydrogenation catalyst, comprising the following steps:

[0034] S1: mixing the carrier and the auxiliary salt solution and crystallizing them to obtain an intermediate;

[0035] S2: mixing the intermediate with a copper-containing solution to obtain a precursor;

[0036] S3: Under a hydrogen atmosphere I, reducing the precursor to obtain the furfuryl alcohol hydrogenation catalyst;

[0037] Wherein, in step S1, the carrier is Al 2 O 3 , the auxiliary element in the auxiliary salt solution is selected from Mg and / or Ti;

[0038] In step S2, the solid-liquid ratio of the intermediate to the copper-containing solution is 0.5 g / mL-0.7 g / mL, and the content of Cu element in the copper-containing solution is 0.8 mol / L-1.0 mol / L.

[0039] It should be noted that the Cu element exists in the copper-containing solution in the form of a soluble Cu salt. The present invention has no special requirements on the soluble Cu salt and the solvent of the copper-containing solution. For example, the soluble Cu salt is Cu(NO 3 ) 2 , the solvent of the copper-containing solution is water.

[0040] According to some preferred embodiments of the present invention, in step S1, the content of Mg element in the auxiliary salt solution is 0.8 mol / L-1.1 mol / L.

[0041] It should be noted that the Mg element is present in the additive salt solution in the form of a soluble Mg salt. The present invention has no special requirements for the soluble Mg salt. For example, the soluble Mg salt is Mg(NO 3 ) 2 .

[0042] According to some preferred embodiments of the present invention, in step S1, the content of Ti element in the auxiliary salt solution is 0.2 mol / L-0.4 mol / L.

[0043] It should be noted that the Ti element exists in the additive salt solution in the form of a soluble Ti salt. The present invention has no special requirements for the soluble Ti salt. For example, the soluble Ti salt is TiCl 4 .

[0044] It should also be noted that the present invention has no special requirements on the solvent of the auxiliary agent salt solution, and a commonly used polar solvent can be used, for example, water.

[0045] According to some preferred embodiments of the present invention, in step S1, the solid-to-liquid ratio of the carrier to the auxiliary salt solution is 0.5 g / L-0.8 g / L.

[0046] According to some preferred embodiments of the present invention, in step S1, the average specific surface area of ​​the carrier is 200 m 2 / g-230m 2 / g, average pore volume 0.6g / cm 3 -0.8g / cm 3 Under the preferred conditions, the conversion rate and selectivity of the furfuryl alcohol hydrogenation catalyst to prepare 1,2-pentanediol are higher.

[0047] According to some preferred embodiments of the present invention, in step S1, the carrier is mixed with the auxiliary agent salt solution, the pH is adjusted to 10-11, and then crystallized to obtain the intermediate.

[0048] According to a particularly preferred embodiment of the present invention, in step S1, the pH regulator used to adjust the pH to 10-11 after mixing the carrier with the auxiliary agent salt solution is sodium bicarbonate.

[0049] According to some preferred embodiments of the present invention, in step S1, the temperature at which the carrier and the auxiliary agent salt solution are mixed is 40°C-100°C.

[0050] According to some particularly preferred embodiments of the present invention, in step S2, the copper-containing solution is copper nitrate.

[0051] According to some preferred embodiments of the present invention, in step S3, the content of hydrogen in the hydrogen atmosphere I is 10 vol%-30 vol%;

[0052] According to some preferred embodiments of the present invention, in step S3, the reduction treatment is carried out at a temperature of 150°C-400°C, a pressure of 0.1MPa-5MPa, and a time of 2h-10h.

[0053] The third aspect of the present invention provides a furfuryl alcohol hydrogenation catalyst prepared by the method provided by the second aspect of the present invention.

[0054] The fourth aspect of the present invention provides use of the furfuryl alcohol hydrogenation catalyst provided by the first aspect or the third aspect of the present invention in catalyzing the hydrogenation of furfuryl alcohol to prepare 1,2-pentanediol.

[0055] The fifth aspect of the present invention provides a method for preparing 1,2-pentanediol, comprising the following steps: introducing a furfuryl alcohol solution into a reactor filled with a furfuryl alcohol hydrogenation catalyst under a hydrogen atmosphere II for hydrogenation reaction treatment to obtain 1,2-pentanediol;

[0056] Wherein, the furfuryl alcohol hydrogenation catalyst is the furfuryl alcohol hydrogenation catalyst provided by the first aspect or the third aspect of the present invention;

[0057] The solvent of the furfuryl alcohol solution is a polar solvent.

[0058] According to some preferred embodiments of the present invention, the concentration of furfuryl alcohol in the furfuryl alcohol solution is 10wt%-50wt%;

[0059] More preferably, the concentration of furfuryl alcohol in the furfuryl alcohol solution is 10 wt%-30 wt%.

[0060] According to some preferred embodiments of the present invention, the solvent of the furfuryl alcohol solution is selected from at least one of anhydrous ethanol, isopropanol, water and methanol. Under the preferred conditions, the conversion rate and selectivity of the furfuryl alcohol hydrogenation catalyst for preparing 1,2-pentanediol are higher.

[0061] According to a particularly preferred embodiment of the present invention, the solvent of the furfuryl alcohol solution is water. Under this preferred condition, the conversion rate and selectivity of the furfuryl alcohol hydrogenation catalyst for preparing 1,2-pentanediol are higher.

[0062] According to some preferred embodiments of the present invention, the hydrogen atmosphere II is such that the molar ratio of hydrogen used for the hydrogenation reaction to furfuryl alcohol in the furfuryl alcohol solution is 10-100:1.

[0063] More preferably, the hydrogen atmosphere II is such that the molar ratio of hydrogen used for the hydrogenation reaction to furfuryl alcohol in the furfuryl alcohol solution is 10-30:1.

[0064] According to some preferred embodiments of the present invention, the mass space velocity of the furfuryl alcohol solution is 0.1 kg / h-1.0 kg / h;

[0065] More preferably, the mass space velocity of the furfuryl alcohol solution is 0.3 kg / h-0.6 kg / h.

[0066] According to some preferred embodiments of the present invention, the reactor is a fixed bed reactor, the ratio of the filling height of the furfuryl alcohol hydrogenation catalyst to the tube diameter of the fixed bed reactor is 4-10:1; the ratio of the filling thickness of the furfuryl alcohol hydrogenation catalyst to the tube diameter of the fixed bed reactor is 0.5-0.8:1. Under the preferred conditions, the conversion rate and selectivity of the furfuryl alcohol hydrogenation catalyst for preparing 1,2-pentanediol are higher.

[0067] According to some preferred embodiments of the present invention, the temperature of the hydrogenation reaction treatment is 100° C.-200° C., and the pressure is 3 MPa-8 MPa in gauge pressure.

[0068] More preferably, the temperature of the hydrogenation reaction treatment is 120°C-180°C, and the pressure is 4MPa-7MPa in gauge pressure.

[0069] The present invention will be described in detail below through examples. In the following examples, the instruments, reagents, materials, etc. involved, unless otherwise specified, are all conventional instruments, reagents, materials, etc. already in the prior art and can be obtained through regular commercial channels. The experimental methods, detection methods, etc. involved in the following examples, unless otherwise specified, are all conventional experimental methods, detection methods, etc. already in the prior art.

[0070] Carrier I: Al 2 O 3 The average specific surface area is 220m 2 / g, average pore volume 0.65g / cm 3 ;

[0071] Carrier II: Al 2 O 3 The average specific surface area is 170m 2 / g, average pore volume 0.5g / cm 3 .

[0072] Preparation Example 1

[0073] S1: mixing the carrier and the auxiliary agent salt solution and crystallizing them to obtain an intermediate, wherein the pH of the mixed solution is adjusted by sodium bicarbonate;

[0074] S2: mixing the intermediate with a copper-containing solution to obtain a precursor;

[0075] S3: Under hydrogen atmosphere I, the precursor is subjected to reduction treatment to obtain the furfuryl alcohol hydrogenation catalyst.

[0076] Among them, the specific parameters are shown in Table 1 below.

[0077] Preparation Example 2-6

[0078] The method is similar to that of Example 1, except that some parameters are changed, specifically, as shown in the following Table 1.

[0079] Comparative Preparation Example 1

[0080] The same method as in Example 1 was used, except that the TiCl 4 Replaced by LaCl 3 .

[0081] Specifically, the parameters are shown in Table 1 below.

[0082] Comparative Preparation Example 2

[0083] The method is similar to that of Example 1, except that Mg and Ti are not modified, and the steps include:

[0084] The carrier is mixed with a copper-containing solution to obtain a precursor, and then the precursor is subjected to a reduction treatment under a hydrogen atmosphere I to obtain the furfuryl alcohol hydrogenation catalyst.

[0085] Among them, the specific parameters are shown in Table 1 below.

[0086] Table 1

[0087]

[0088]

[0089] Note: Solid-liquid ratio I represents the solid-liquid ratio of the carrier and the auxiliary salt solution used for mixing in step S1;

[0090] Solid-liquid ratio II represents the solid-liquid ratio of the intermediate used for mixing and the copper-containing solution in step S2; Special note: In comparative preparation example 2, solid-liquid ratio II represents the solid-liquid ratio of the carrier used for mixing and the copper-containing solution;

[0091] The hydrogen atmosphere I consists of hydrogen and nitrogen.

[0092] The composition of the furfuryl alcohol hydrogenation catalysts prepared in the preparation examples of the present invention and the comparative preparation examples was detected by an ICP (inductively coupled plasma) instrument. The specific results are shown in Table 2 below.

[0093] The average specific surface area and average pore volume of the furfuryl alcohol hydrogenation catalysts prepared in the preparation examples of the present invention and the comparative preparation examples were detected by nitrogen adsorption and desorption method. The specific results are shown in Table 2 below.

[0094] Table 2

[0095]

[0096]

[0097] Example 1

[0098] Under hydrogen atmosphere II, the furfuryl alcohol solution is introduced into a fixed bed reactor filled with a furfuryl alcohol hydrogenation catalyst for hydrogenation reaction treatment to obtain 1,2-pentanediol, wherein the furfuryl alcohol hydrogenation catalyst is C1.

[0099] Specifically, the parameters are shown in Table 3 below.

[0100] Embodiment 2-6

[0101] The process was carried out in the same manner as in Example 1, except that the type of furfuryl alcohol hydrogenation catalyst was changed.

[0102] Specifically, the parameters are shown in Table 3 below.

[0103] Embodiment 7-8

[0104] The process was carried out in the same manner as in Example 1, except that the solvent of the furfuryl alcohol solution was changed.

[0105] Specifically, the parameters are shown in Table 3 below.

[0106] Comparative Example 1-2

[0107] The process was carried out in the same manner as in Example 1, except that the type of furfuryl alcohol hydrogenation catalyst was changed.

[0108] Specifically, the parameters are shown in Table 3 below.

[0109] Comparative Example 3

[0110] The method of Example 1 is followed, except that the solvent of the furfuryl alcohol solution is replaced by a non-polar solvent.

[0111] Specifically, the parameters are shown in Table 3 below.

[0112] Table 3

[0113]

[0114] Note: hydrogen-to-alcohol ratio refers to the molar ratio of hydrogen gas used in the hydrogenation reaction to furfuryl alcohol in the furfuryl alcohol solution;

[0115] Conversion rate refers to the mass ratio of furfuryl alcohol consumption to the total furfuryl alcohol raw materials;

[0116] Selectivity refers to the mass ratio of the target product (1,2-pentanediol) to the total products (including 1,2-pentanediol and other impurity products); the conversion rate and selectivity in Table 3 are the selectivity and conversion rate measured after the furfuryl alcohol hydrogenation catalyst was operated for 200 hours.

[0117] Table 3 (Continued)

[0118]

[0119] Note: hydrogen-to-alcohol ratio refers to the molar ratio of hydrogen gas used in the hydrogenation reaction to furfuryl alcohol in the furfuryl alcohol solution;

[0120] Conversion rate refers to the mass ratio of furfuryl alcohol consumption to the total furfuryl alcohol raw materials;

[0121] Selectivity refers to the mass ratio of the target product (1,2-pentanediol) to the total products (including 1,2-pentanediol and other impurity products);

[0122] The conversion and selectivity in Table 3 are the selectivity and conversion measured after the furfuryl alcohol hydrogenation catalyst was operated for 200 hours.

[0123] It can be seen from Tables 1 to 3 that the furfuryl alcohol hydrogenation catalyst provided by the present invention has good catalytic effect and strong stability. After continuous operation for 200 hours, the furfuryl alcohol hydrogenation conversion rate can be maintained at more than 95%, and the selectivity can be maintained at more than 44%;

[0124] In particular, when the furfuryl alcohol hydrogenation catalyst provided by the present invention catalyzes the hydrogenation of furfuryl alcohol, and the solvent of the furfuryl alcohol solution is water, the conversion rate of the furfuryl alcohol hydrogenation catalyst can be maintained at more than 96% and the selectivity can be maintained at more than 50% after continuous operation for 200 hours;

[0125] Furthermore, when the furfuryl alcohol hydrogenation catalyst contains MgO and TiO 2 When the furfuryl alcohol hydrogenation catalyst is continuously operated for 200 hours, the conversion rate can be maintained above 96%, and the selectivity can be maintained above 56%;

[0126] Furthermore, when the average specific surface area of ​​the furfuryl alcohol hydrogenation catalyst is 200 m 2 / g-230m 2 / g, average pore volume 0.6g / cm 3 -0.8g / cm 3 When the furfuryl alcohol hydrogenation catalyst is continuously operated for 200 hours, the conversion rate can be maintained above 99%, and the selectivity can be maintained above 60%.

[0127] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A furfuryl alcohol hydrogenation catalyst, characterized in that The invention comprises a carrier, an auxiliary agent embedded in the carrier and Cu nanoparticles loaded on the carrier, wherein the carrier is Al2O3, the auxiliary agent is selected from MgO and / or TiO2, Based on the total mass of the furfuryl alcohol hydrogenation catalyst, the content of the Cu nanoparticles is 10wt%-30wt%.

2. The furfuryl alcohol hydrogenation catalyst according to claim 1, characterized in that The auxiliary agent is MgO or TiO2, wherein the content of the auxiliary agent is 1wt%-20wt% based on the total mass of the furfuryl alcohol hydrogenation catalyst.

3. The furfuryl alcohol hydrogenation catalyst according to claim 1, characterized in that The auxiliary agents are MgO and TiO2, wherein, based on the total mass of the furfuryl alcohol hydrogenation catalyst, the content of MgO is 1wt%-20wt%, and the content of TiO2 is 1wt%-20wt%.

4. The furfuryl alcohol hydrogenation catalyst according to any one of claims 1 to 3, characterized in that The average specific surface area of ​​the furfuryl alcohol hydrogenation catalyst is 200 m 2 / g-230m 2 / g, average pore volume 0.5g / cm 3 -0.7g / cm 3 .

5. A method for preparing a furfuryl alcohol hydrogenation catalyst, characterized in that: The following steps are involved: S1: mixing the carrier and the auxiliary salt solution and crystallizing them to obtain an intermediate; S2: mixing the intermediate with a copper-containing solution to obtain a precursor; S3: Under a hydrogen atmosphere I, reducing the precursor to obtain the furfuryl alcohol hydrogenation catalyst; Wherein, in step S1, the carrier is Al2O3, and the auxiliary element in the auxiliary salt solution is selected from Mg and / or Ti; In step S2, the solid-liquid ratio of the intermediate to the copper-containing solution is 0.5 g / mL-0.7 g / mL, and the content of Cu element in the copper-containing solution is 0.8 mol / L-1.0 mol / L.

6. The method according to claim 5, characterized in that In step S1, in the auxiliary salt solution, the content of Mg element is 0.8 mol / L-1.1 mol / L; And / or, in step S1, in the auxiliary salt solution, the content of Ti element is 0.2 mol / L-0.4 mol / L; and / or, in step S1, the solid-to-liquid ratio of the carrier to the auxiliary agent salt solution is 0.5 g / mL-0.8 g / mL; And or, in step S1, the average specific surface area of ​​the carrier is 200m 2 / g-230m 2 / g, average pore volume 0.6g / cm 3 -0.8g / cm 3 .

7. The method according to claim 5 or 6, characterized in that: In step S1, the carrier and the auxiliary agent salt solution are mixed, the pH is adjusted to 10-11, and then crystallized to obtain the intermediate; Preferably, in step S1, the carrier and the auxiliary agent salt solution are mixed at a temperature of 40°C-100°C.

8. The method according to claim 5 or 6, characterized in that: In step S3, the content of hydrogen in the hydrogen atmosphere I is 10 vol%-30 vol%; And / or, in step S3, the reduction treatment is carried out at a temperature of 150°C-400°C, a pressure of 0.1MPa-5MPa, and a time of 2h-10h.

9. The furfuryl alcohol hydrogenation catalyst prepared by the method described in any one of claims 5 to 8.

10. Use of the furfuryl alcohol hydrogenation catalyst according to any one of claims 1 to 4 and 9 in catalyzing the hydrogenation of furfuryl alcohol to prepare 1,2-pentanediol.

11. A method for preparing 1,2-pentanediol, characterized in that: The following steps are involved: Under hydrogen atmosphere II, the furfuryl alcohol solution is introduced into a reactor filled with a furfuryl alcohol hydrogenation catalyst for hydrogenation reaction treatment to obtain 1,2-pentanediol; Wherein, the furfuryl alcohol hydrogenation catalyst is the furfuryl alcohol hydrogenation catalyst according to any one of claims 1 to 4 and 9; The solvent of the furfuryl alcohol solution is a polar solvent.

12. The preparation method according to claim 11, characterized in that: The concentration of furfuryl alcohol in the furfuryl alcohol solution is 10wt%-50wt%; And / or, the solvent of the furfuryl alcohol solution is selected from at least one of anhydrous ethanol, isopropanol, water and methanol.

13. The preparation method according to claim 11 or 12, characterized in that: The hydrogen atmosphere II is such that the molar ratio of hydrogen in the hydrogenation reaction to furfuryl alcohol in the furfuryl alcohol solution is 10-100:1; Preferably, the hydrogen atmosphere II is such that the molar ratio of hydrogen used for the hydrogenation reaction to furfuryl alcohol in the furfuryl alcohol solution is 10-30:

1.

14. The preparation method according to claim 11 or 12, characterized in that: The mass space velocity of the furfuryl alcohol solution is 0.1kg / h-1.0kg / h; Preferably, the mass space velocity of the furfuryl alcohol solution is 0.3kg / h-0.6kg / h.

15. The preparation method according to claim 11 or 12, characterized in that: The reactor is a fixed bed reactor, the ratio of the filling height of the furfuryl alcohol hydrogenation catalyst to the tube diameter of the fixed bed reactor is 4-10:1, and the ratio of the filling thickness of the furfuryl alcohol hydrogenation catalyst to the tube diameter of the fixed bed reactor is 0.5-0.8:1; And / or, the temperature of the hydrogenation reaction treatment is 100° C.-200° C., and the pressure is 3 MPa-8 MPa in gauge pressure.

Images