A kind of preparation method of polymetallic continuous reforming catalyst
A reforming catalyst and multi-metal technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve problems such as unfavorable gasoline yield and decreased catalyst activity, To achieve the effect of improving selectivity and anti-coking ability, and improving reaction stability
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example 1
[0028] (1) Preparation of tin-containing γ-Al with uniform distribution of tin 2 o 3 small ball.
[0029] Take 100 grams of SB aluminum hydroxide powder (manufactured by Sasol, Germany, with an alumina content of 72% by mass) and an appropriate amount of deionized water to make the liquid / solid mass ratio 2.0, and stir to prepare a slurry. Add 7.5 ml of dilute nitric acid with a volume ratio of 1:1, 30 g of urea and a predetermined amount of SnCl 2 hydrochloric acid solution, make the Sn content in the solution be 0.30% by mass relative to the dry base alumina, stir for 1 hour, add 30 grams of kerosene and 3 grams of fatty alcohol polyoxyethylene ether and stir for 1 hour, drop the ball into the oil ammonia column . The wet bulb is solidified in ammonia water for 1 hour, then filtered, rinsed with deionized water for 2 to 3 times, dried at 60°C for 6 hours, dried at 120°C for 10 hours, and calcined at 600°C for 4 hours to obtain Sn-containing γ-Al 2 o 3 A small ball with ...
example 2
[0035] Catalyst is prepared according to the method of example 1, and difference is (3) the temperature that carries out high-temperature water chlorine activation after introducing platinum is 720 ℃, and the water / HCl mol ratio of water chlorine activation treatment is 8, and through low-temperature water chlorine activation treatment and reduction , to obtain catalyst B, wherein the active component content calculated based on the alumina carrier is: 0.29 mass % of Pt, 0.30 mass % of Sn, 0.24 mass % of Eu, 1.15 mass % of Cl, and the specific surface area of the catalyst measured by nitrogen adsorption method and pore volume are shown in Table 1.
example 3
[0046] Catalyst is prepared by the method for example 1, and difference is that (2) step is that 0.94 g / liter is used in Eu concentration, and the mixed solution of europium nitrate and cerium nitrate that Ce concentration is 1.25 g / liter is impregnating liquid to impregnate Sn-containing γ- Al 2 o 3 Spheroid carrier, the liquid / solid ratio during impregnation is 1.6ml / g, then filters, and gained solid is dried at 60 ℃ for 12 hours, feeds the air that contains water 3 volume % then at 600 ℃ roasting 4 hours at 600 ℃, press ( 3) The one-step method introduces platinum and performs two-stage water chlorine activation treatment, and obtains catalyst G after reduction, wherein the active component content calculated on the basis of alumina support is: Pt 0.29 mass %, Sn 0.30 mass %, Eu0.15 Mass%, Ce 0.20 mass%, Cl 1.15 mass%, the specific surface area and pore volume of the catalyst measured by nitrogen adsorption method are shown in Table 1.
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