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Preparation method of polymetallic reforming catalyst

A reforming catalyst, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, naphtha catalytic reforming, etc., can solve the problems of catalyst activity decline, gasoline yield decline, etc.

Active Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these reactions, the gasoline yield decreases due to the generation of light hydrocarbon gases by the hydrocracking reaction
In addition to the above reactions, another very unfavorable reaction process is the carbon deposition reaction. As the reaction progresses, the amount of carbon deposition on the catalyst increases continuously, and the activity of the catalyst also decreases.

Method used

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  • Preparation method of polymetallic reforming catalyst
  • Preparation method of polymetallic reforming catalyst
  • Preparation method of polymetallic reforming catalyst

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038] (1) Preparation of tin-containing γ-Al with uniform distribution of tin 2 o 3 small ball.

[0039] By the method of CN1150169A example 1, 100 grams of SB aluminum hydroxide powder (Germany, produced by Condea company) and an appropriate amount of deionized water are stirred and slurried, and the liquid / solid mass ratio is 2.0. 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, so that the Sn content in the solution is 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 balls in the oil ammonia column to form. 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 a ...

example 2

[0045] Prepare catalyst by the method for example 1, difference is (2) step replaces europium nitrate with samarium nitrate, obtains the catalyst precursor that platinum, tin and samarium are uniformly distributed in alumina carrier, wherein contains platinum 0.29 quality %, tin 0.30 quality %, samarium 0.1 mass %, after roasting, press (3) step method and SmCl 3 ·6H 2 O powder carries out solid phase contact at 150 ℃, and the contact time is 10 hours, and the active component content of the prepared catalyst C is: Pt0.29 mass %, Sn0.30 mass %, Sm0.15 mass %, Cl1.10 mass % %, wherein the average content of Sm in the outer shell area is 2.8 times that of the central area, and the distribution of Sm content on the radius of the catalyst pellet section is shown in figure 1 .

example 3～6

[0051] The following examples evaluate the reforming reaction performance of the catalysts.

[0052] In the micro-reaction device, 3.0 milliliters of catalysts are loaded, and the performance of the catalysts is evaluated as a raw material with n-heptane. The control reaction conditions are: 500 ° C, 0.70 MPa (gauge pressure), feed liquid volume space velocity 10 hours −1, The hydrogen / hydrocarbon molar ratio was 5, and the catalysts reacted at 500°C for 10 hours were used for carbon content analysis. The catalysts used in each example and the reaction results are shown in Table 1.

[0053] Table 1

[0054]

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Abstract

A preparation method of a polymetallic reforming catalyst comprises the following steps: allowing platinum, tin and rare earth metal uniformly-supported small catalyst spheres to be in solid contact with rare earth metal salt powder, and roasting the obtained mixture in air or water-containing air to obtain a reforming catalyst with rare earth metals enriched in the shell area of the catalyst, wherein the average content of rare earth metals in the shell area is 2-5 times the average content of rare earth metals in a center area, the catalyst shell area is an area from the outer edge of the small catalyst sphere to the center and with the thickness of 150[mu]m, the solid phase supported catalyst comprises an alumina carrier, platinum accounting for 0.1-2.0% of the mass of the alumina carrier, tin accounting for 0.1-2.0% of the mass of the alumina carrier, rare earth metals accounting for 0.05-1.0% of the mass of the alumina carrier, and chlorine accounting for 0.5-5.0% of the mass of the alumina carrier. The catalyst prepared through the method has good activity and stability and low carbon depositing rate in reforming reactions.

Description

technical field [0001] The invention relates to a method for preparing a multi-metal reforming catalyst, in particular to a method for preparing a platinum-tin reforming catalyst containing rare earth metals. Background technique [0002] Catalytic reforming process is one of the important petroleum processing processes to produce high-octane gasoline, aromatics and cheap hydrogen. Naphtha components can be converted into products rich in aromatics through catalytic reforming process, which can be used to deploy high-octane gasoline or obtain benzene, toluene, xylene and other chemical raw materials through separation and purification. High-performance catalysts play a decisive role in the economic benefits of the catalytic reforming process. The reforming catalyst is a bifunctional catalyst, having both the acidic function of isomerization and the metal function of hydrogenation-dehydrogenation. The acidic function of the catalyst is generally provided by a porous acidic ...

Claims

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Application Information

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IPC IPC(8): B01J27/135C10G35/09
Inventor 王春明马爱增潘锦程
Owner CHINA PETROLEUM & CHEM CORP
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