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Preparation method of Pt-Sn reforming catalyst

A technology for reforming catalysts and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve the problem of carbon deposition blockage, the role of platinum unfavorable metal centers, Platinum centers cannot effectively play a catalytic role and achieve the effects of low carbon deposition rate, high activity and stability

Active Publication Date: 2013-09-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Platinum loaded into the pores is not conducive to play the role of its metal center due to the influence of mass transfer and other factors
During the reaction process, the small pores are easily blocked by carbon deposits, which will also cause the internal platinum center to be unable to effectively play a catalytic role.

Method used

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  • Preparation method of Pt-Sn reforming catalyst

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] (1) Preparation of tin-containing γ-Al 2 o 3 small ball.

[0035] 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 milliliters of dilute nitric acid with a volume ratio of 1: 1, 30 grams of urea and a predetermined amount of tin protochloride hydrochloric acid solution, so that the Sn content in the solution is 0.30 mass % relative to dry base alumina, stir for 1 hour, add 30 grams of kerosene and 3 grams of fatty alcohol polyoxyethylene ether were stirred for 1 hour, and dropped into balls in 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 Small ball, the specific s...

example 2

[0039] Prepare catalyst by the method for example 1, difference is in 50.0 gram dry tin-containing gamma-Al 2 o 3 5.5 grams of water is adsorbed on the small ball carrier, the water absorption is equivalent to 11% of the mass of the carrier on a dry basis, and the volume of the adsorbed water at 25° C. is equivalent to 13.8% of the pore volume of the carrier. The prepared catalyst B contained 0.29% by mass of platinum, 0.30% by mass of tin and 1.1% by mass of chlorine.

example 3

[0041] Prepare catalyst by the method for example 1, difference is in 50.0 gram dry tin-containing gamma-Al 2 o 3 7.0 grams of water is adsorbed on the pellet carrier, the water absorption is equivalent to 14% of the mass of the carrier on a dry basis, and the volume of the adsorbed water at 25° C. is equivalent to 17.5% of the pore volume of the carrier. The prepared catalyst C contained 0.29% by mass of platinum, 0.30% by mass of tin and 1.1% by mass of chlorine.

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Abstract

The invention relates to a preparation method of a Pt-Sn reforming catalyst, which comprises an alumina carrier, and calculated on the basis of the alumina carrier, 0.1-1.0 mass% of platinum, 0.1-2.0 mass% of tin and 0.5-5.0 mass% of chlorine. The preparation method of the catalyst includes: making the dried tin-containing alumina carrier adsorb a proper amount of water, which accounts for 3-30% of the pore volume of the tin-containing alumina carrier in terms of volume at 25DEG C, then using platinum acetylacetonate-containing alkane of C7-C9 as an impregnation solution to impregnate the tin-containing alumina carrier with absorbed water, and then subjecting the impregnated solid to drying, water chlorine activation and reduction. The method can make metal platinum directionally loaded to large holes above certain aperture. The prepared catalyst has good activity and stability in the reforming reaction, and has a low carbon deposition rate.

Description

technical field [0001] The invention is a method for preparing a reforming catalyst, in particular, a method for preparing a bimetallic reforming catalyst. Background technique [0002] The catalytic reforming process converts naphtha components into products rich in aromatics. The reformed products can be used to deploy high-octane gasoline or obtain benzene, toluene, xylene and other chemical raw materials through separation and purification. A high-performance catalyst is the key to the catalytic reforming process. [0003] The indicators to measure catalyst performance include activity, selectivity and stability. For reforming catalysts, activity refers to the ability of the catalyst to convert reactants into desired products under given reaction conditions. Generally speaking, the activity is expressed as the octane number of the product obtained under the given raw material and reaction conditions, or the reaction temperature at a given octane number; selectivity ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62C10G35/09
Inventor 王春明马爱增潘锦程蔡迎春刘辰王国成
Owner CHINA PETROLEUM & CHEM CORP
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