Preparation method of high-selectivity hydroisomerization catalyst
A hydroisomerization, high-selectivity technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc. The effect of avoiding the accumulation of reaction heat, stable activity and low cost
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[0028] Step a, the preparation steps of catalyst carrier are as follows:
[0029] 1. Prepare SAPO-II molecular sieve and inorganic binder according to the mass ratio of 40-80%: 20-60% to make the main powder, and add 0.1-5% of the total weight of the powder into the mixer for dry mixing 10-60 minutes, take out the powder and pass through a 20-60 mesh screen to remove coarse particles;
[0030] 2. Put the sieved powder into the mud making machine, then add water of 60-150% of the weight of the powder, and knead for 20-90 minutes to make the powder into mud;
[0031]3. Put the mud material in step 2 into the mud refining machine, and knead the mud material into a dense mud section for subsequent molding;
[0032] 4. The mud section in step 3 is shaped into a cylindrical, three-lobe or four-lobe mud base by an extruder and a mold;
[0033] 5. The mud in step 4 is dried at room temperature to 200°C until the moisture content is lower than 15%;
[0034] 6. Then send the green bo...
Embodiment 1
[0038] A preparation method of highly selective hydroisomerization catalyst, which comprises the following steps:
[0039] Catalyst carrier: Put 1.0kg of silica sol, 1kg of SAPO-II molecular sieve, 0.2kg of hydroxypropyl cellulose and 0.3kg of squash gum into the conical mixer, take it out after 15 minutes of mixing and put it into the mud making machine Make the mud for 10 minutes, take it out, extrude it into a strip-shaped clover-shaped green body through an extruder with a clover mold, dry it in an oven at 70°C until the water content of the green body is 6.3%, and bake it in a muffle furnace at 570°C for 7 hours;
[0040] Impregnation: Put the catalyst carrier into the vacuum impregnation machine (there is no solution in the vacuum impregnation machine at this time), heat to 120°C, start the vacuum pump, and vacuum it for 60 minutes, the vacuum degree is -0.093Mpa, and the input lanthanum content is 0.1g / L of lanthanum nitrate solution, keep the vacuum state, after immer...
Embodiment 2
[0043] Catalyst carrier: put 0.418kg aluminum sol, 0.582kg SAPO-II molecular sieve, 0.2kg hydroxypropyl cellulose and 0.3kg safflower gum into the conical mixer, take it out after 15 minutes of mixing and put it into the mud making machine Inner: make mud for 10 minutes, take it out, extrude it into a strip-shaped clover-shaped green body through an extruder with a clover mold, dry in an oven at 70°C until the water content of the green body is 5.3%, and bake in a muffle furnace at 570°C for 6 hours;
[0044] Impregnation: Put the catalyst carrier into the vacuum impregnation machine, heat it to 120°C, start the vacuum pump, and evacuate it for 60 minutes. After immersion for 30 minutes, turn off the vacuum pump, open the pressure relief valve, wait until the vacuum gauge returns to zero, open the drain valve, discharge the lanthanum nitrate solution out of the impregnation machine, start the dehydration device, remove the floating water of the green body, and place the removed...
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