A kind of normal paraffin low-temperature isomerization catalyst and its preparation method and application
A low-temperature isomerization and n-alkane technology, applied in the direction of isomerization hydrocarbon production, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low utilization rate of effective Cl and inability to ensure uniform distribution of Cl , to achieve the effect of improving activity and stability, increasing effective active specific surface area, and improving isomerization activity
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Embodiment 1
[0029] Get 20 parts by weight of chloroplatinic acid, impregnate it into γ-Al of 100 parts by weight 2 o 3 On the carrier, γ-Al 2 o 3 The specific surface area of the carrier is 220m 2 / g, the pore volume is 0.55ml / g, and then the impregnated product is placed in an oven at 100°C for drying treatment for 2h, and then placed in a muffle furnace at 500°C for 5h.
[0030] The obtained product is reduced by hydrogen, the reduction temperature in the reactor is 250°C, the hydrogen pressure is 2MPa, and the reduction time is 2h; then the hydrogen pressure is kept at 0.1MPa, and the reaction temperature is lowered to 20°C to obtain Catalyst to be chlorinated.
[0031] AlCl 3 Dissolved in ethyl acetate solvent, where AlCl 3 The Cl concentration is 18% of the solution mass. Under the condition that the temperature is 20°C, the catalyst is chlorinated in liquid phase on the reaction device, chlorinated at normal pressure for 15 hours, and the volume space velocity is 2 hours. -...
Embodiment 2
[0038] Get 30 parts by weight of chloroplatinic acid and impregnate it into 80 parts by weight of γ-Al 2 o 3 On the carrier, γ-Al 2 o 3 The specific surface area of the carrier is 200m 2 / g, the pore volume is 0.60ml / g, and then the impregnated product is dried in an oven at 100°C for 4h, and then baked in a muffle furnace at 600°C for 2h.
[0039] The obtained product is reduced by hydrogen, the reduction temperature in the reactor is 450°C, the hydrogen pressure is 1MPa, and the reduction time is 3h; then the hydrogen pressure is kept at 0.1MPa, and the reaction temperature is lowered to 30°C to obtain Catalyst to be chlorinated.
[0040] AlCl 3 Dissolved in a mixed solvent of ethyl acetate and chloroform (4:1), where AlCl 3 The concentration of Cl is 16% of the solution mass. Under the condition that the temperature is 30°C, the catalyst is chlorinated in liquid phase on the reaction device, chlorinated at normal pressure for 15h, and the volume space velocity is 1....
Embodiment 3
[0047] Get 25 parts by weight of chloroplatinic acid, impregnate it into γ-Al of 120 parts by weight 2 o 3 On the carrier, γ-Al 2 o 3 The specific surface area of the carrier is 240m 2 / g, the pore volume is 0.75ml / g, and then the impregnated product is dried in an oven at 110°C for 4h, and then baked in a muffle furnace at 700°C for 3h.
[0048] The obtained product is reduced by hydrogen, the reduction temperature in the reactor is 250°C, the hydrogen pressure is 3MPa, and the reduction time is 4h; then the hydrogen pressure is kept at 0.5MPa, and the reaction temperature is lowered to 25°C to obtain Catalyst to be chlorinated.
[0049] AlCl 3 Dissolved in a mixed solvent of ethyl acetate and chloroform (3:1), where AlCl 3 The concentration of Cl is 15% of the solution mass. Under the condition that the temperature is 25°C, the catalyst is chlorinated in liquid phase on the reaction device, chlorinated at normal pressure for 15 hours, and the volume space velocity is...
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