Method for preparing hydrotreating catalyst
A hydrogenation treatment and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of weakening the activity of hydrogenation active metals, dispersion dispersion, small catalyst pore size, etc., to avoid Reduced mechanical strength, improved overall performance, and improved utilization
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[0030] The preparation method of the hydrotreating catalyst provided by the invention specifically comprises:
[0031] (1) Precipitation of oxide precursors containing Al, W, and Ni is generated by co-precipitation
[0032] Prepare a salt solution containing W, Ni, and Al according to the content ratio of the catalyst components. The aluminum-containing salt can be one or more of aluminum chloride, aluminum nitrate, aluminum sulfate, etc., and the tungsten-containing salt can be ammonium metatungstate , sodium tungstate, etc., and the nickel-containing salt can be one or more of nickel sulfate, nickel nitrate, nickel chloride, basic nickel carbonate, nickel oxalate, etc.; the alkaline precipitant used It can be an inorganic or organic alkaline water-soluble compound, such as one or more of sodium hydroxide, sodium carbonate, sodium bicarbonate, ammonia water, urea, etc., preferably ammonia water, and the concentration of ammonia water can be any feasible ratio; or Prepare W a...
Embodiment 1
[0041] Add 5L of clean water to the gelling tank and raise the temperature to 45°C;
[0042] In a container A, add 2L of clean water, 1565g of aluminum chloride, stir to dissolve, add 25g of ammonium dihydrogen phosphate, 392g of nickel chloride, 467g of ammonium metatungstate, stir to dissolve, drop in the 2 750mL of 85g / L dilute water glass solution to obtain a mixed salt solution containing W, Ni, Al, Si, P;
[0043] Add the mixed salt solution containing W, Ni, Al, Si, P and ammonia water with a concentration of 15wt% into the above gelling tank under continuous stirring, control the gelling temperature at 45°C, and the pH of the slurry at 8.0±0.2, Complete the gelation within 40 minutes. After the gelation is completed, heat the slurry to 70 ° C for 3 hours and filter;
[0044] Put the filter cake obtained above into a reaction tank, add 3500mL of clean water, make a slurry, weigh 212g of molybdenum trioxide, add it to the above slurry, and filter the slurry after beatin...
Embodiment 2
[0048] Take a portion of the shaped bar A2 with a dry basis content of 60wt% prepared in Example 1, spray and soak it with 40mL of an organic acid mixed aqueous solution containing 3g of acetic acid and 7g of citric acid, then put it into a glass container, and keep it in a constant temperature water bath at 50°C for 40min ; Drying and calcination conditions are the same as in Example 1 to obtain catalyst B of the present invention.
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