Catalyst for producing 1, 5-pentanediol through hydrogenolysis of tetrahydrofurfuryl alcohol, preparation method and application thereof
By using polystyrene or silica gel-supported catalysts grafted with nitrogen-containing ligands, the problems of low catalyst activity and high production cost when preparing 1,5-pentanediol from tetrahydrofurfuryl alcohol are solved, and the high activity and stability of the catalyst are achieved properties, reducing process costs.
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Embodiment 1～24
[0030] Embodiment 1~24: Catalyst preparation
[0031] Prepared by step-by-step equal-volume impregnation method, first the soluble salts (rhodium chloride, chloroiridic acid, chloroplatinic acid, palladium chloride, ruthenium chloride) of noble metal M (Rh, Ir, Pt, Pd, Ru, Au) , chloroauric acid) were formulated into aqueous solutions, and the carrier S powder was added according to the ratio in Table 1, stirred and mixed evenly, impregnated at room temperature for 12 hours, and dried at 120°C for 12 hours; then the additives P (Re, Mo, W, V, Nb , Ta, Mn, Sn) soluble salts (ammonium rhenate, ammonium molybdate, ammonium metatungstate, ammonium vanadate, niobium tartrate, tantalum tartrate, manganese acetate, tin chloride) respectively prepared aqueous solution, according to Table 1 The proportion of the catalyst was added to the carrier S impregnated with the precious metal M component, stirred and mixed evenly, impregnated at room temperature for 12 hours, and dried at 120°C ...
Embodiment 28～54
[0035] Examples 28-54: Catalyst Evaluation——Batch Kettle
[0036] The catalyst evaluation of the present invention is carried out in batch kettle reactor, and reactor volume is 5000mL, and material is stainless steel. A certain amount of catalyst is added into the reactor, and the catalyst is reduced in situ before the reaction, the reduction temperature is 150°C, H 2 The pressure is 0.3MPa, H 2 The flow rate is 1.5L / min, and the reduction takes 4 hours. Reduce to reaction temperature after reduction finishes, add the tetrahydrofurfuryl alcohol aqueous solution of 3000g certain concentration, regulate temperature to reaction temperature, charge the hydrogen of certain pressure, start reaction, finish after certain hour, concrete reaction condition is as shown in table 2, and the cooling vent Liquid samples were taken after pressing and analyzed by the gas chromatography equipped with DB-5 capillary column and flame ionization detector (FID) as mentioned above.
[0037] The ...
Embodiment 55～81
[0042] Examples 55-81: Catalyst evaluation - fixed bed
[0043] The catalyst evaluation of the present invention is carried out in a fixed-bed reactor, which is a stainless steel tube with an outer diameter of 40 mm, an inner diameter of 20 mm, and a length of 1000 mm. Load 50g of catalyst into the reactor, and reduce the catalyst in situ before the reaction, the reduction temperature is 150°C, H 2 The pressure is 0.3MPa, H 2 The flow rate is 1.5L / min, and the reduction takes 4 hours. Reduce to reaction temperature after reduction, set hydrogen / catalyst volume space velocity as 1000h -1 , adjust the tetrahydrofurfuryl alcohol aqueous solution flow rate to the required tetrahydrofurfuryl alcohol liquid material / catalyst mass space velocity, adjust the pressure to the required reaction pressure, the specific reaction conditions are shown in Table 2, take the liquid sample online, and use the above-mentioned DB- Gas chromatography with a 5 capillary column and a flame ionizati...
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Abstract
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