Bimetal reforming catalyst and preparation method thereof

A reforming catalyst and bimetallic technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of accelerating catalyst deactivation rate, reducing gasoline yield, increasing device operating costs, etc. , to achieve the effect of good stability, high liquid yield and low carbon deposition

Active Publication Date: 2012-08-22
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 yield of gasoline will be reduced due to the generation of light hydrocarbon gas by hydrocracking; the coking reaction will accelerate the deactivation rate of the catalyst, and frequent catalyst regeneration will increase the operating cost of the unit

Method used

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  • Bimetal reforming catalyst and preparation method thereof
  • Bimetal reforming catalyst and preparation method thereof
  • Bimetal reforming catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0044] Catalysts described in the present invention are prepared.

[0045] (1) Preparation of Sn-containing spherical Al 2 o 3 carrier.

[0046] 100 grams of SB aluminum hydroxide powder (Germany, produced by Condea company) and an appropriate amount of deionized water are mixed to make the liquid / solid mass ratio 2.0, stirring and slurrying, adding 7.5 milliliters of dilute acid with a volume ratio of 1: 1, 30 The hydrochloric acid solution of the tin protochloride of gram urea and predetermined amount, make the Sn content in the solution be 0.30 mass % (relatively dry base aluminum oxide), stir 1 hour, add 30 gram kerosene and 3 gram fatty alcohol polyoxyethylene ethers Stir for 1 hour, and drop balls into the oleyl ammonia column to form. The wet bulb was 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 alum...

example 2

[0052] Catalyst is prepared by the method of example 1, difference is (2) the mass ratio of the citric acid contained in the impregnating liquid of step preparation and dry basis alumina is 8%, the composition of the catalyst B that makes is shown in Table 1, wherein platinum Radial distribution see figure 1 , the radial distribution of tin see image 3 .

[0053] The average concentration of Pt in the center area of ​​catalyst B is 0.71, the average concentration of Pt in the spherical shell area is 0.40, and the ratio of the average Pt concentration in the spherical center area to the spherical shell area is 1.76.

example 3

[0061] Prepare catalyst by the method for example 1, difference is (2) step replaces citric acid with tartaric acid when preparing impregnation solution, the mass ratio of the tartaric acid contained in impregnation solution and dry base alumina is 7%, the composition of the prepared catalyst E See Table 1, where the radial distributions of platinum and tin are shown in figure 1 and image 3 .

[0062] The average concentration of Pt in the center area of ​​catalyst E is 1.17, the average concentration of Pt in the spherical shell area is 0.54, and the ratio of the average Pt concentration in the spherical center area to the spherical shell area is 2.17.

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Abstract

The invention discloses a bimetal reforming catalyst and a preparation method thereof. The catalyst comprises a spherical alumina carrier and the following active ingredients loaded on the alumina carrier based on dry-basis alumina in percentage by weight: 0.01 to 5.0 percent of group VIII metal, 0.01 to 5.0 percent of group IVA metal and 0.01 to 10.0 percent of halogen; and in catalyst pellets, the mean concentration ratio of the group VIII metal in a spherical center region to the group VIII metal in a spherical shell region is 1.6-2.9. The method for preparing the catalyst comprises the following steps of: impregnating the group IVA metal-containing alumina by using impregnation liquid which contains a group VIII metal compound and polybasic organic acid; and drying and roasting the solid obtained by impregnation. The catalyst is used for hydrocarbon reforming reaction and has higher selectivity and good carbon deposit resistance.

Description

technical field [0001] The invention relates to a bimetallic reforming catalyst and a preparation method thereof, in particular to a catalyst containing Group VIII metal and Group IVA metal and a preparation method thereof. Background technique [0002] Catalytic reforming is one of the important production processes in petroleum refining, and its main purpose is to produce high-octane gasoline, aromatics and by-product hydrogen. At present, most of the reforming catalysts widely used in industry are bimetallic reforming catalysts, mainly including two series of Pt-Re and Pt-Sn. Compared with Pt-Re catalysts, Pt-Sn catalysts have better low-pressure stability and higher aromatics selectivity, and the catalysts do not require pre-sulfurization before use, and are more suitable for continuous reforming processes. For the reforming unit producing high-octane gasoline, it is necessary to increase its liquid yield as much as possible under the premise that the octane number of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/135B01J27/128B01J35/08B01J37/02B01J37/08C10G35/09
Inventor 靳彪马爱增王春明
Owner CHINA PETROLEUM & CHEM CORP
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