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Oxidation-state reforming catalyst and preparation method thereof

A technology for reforming catalysts and oxidation states, which is applied in physical/chemical process catalysts, chemical instruments and methods, catalytic reforming of naphtha, etc., and can solve problems such as easy generation of coke deposits and large particle size of platinum clusters. Achieve the effects of not easy to aggregate, small particle size, and enhanced interaction

Active Publication Date: 2019-07-30
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The main purpose of the present invention is to provide an oxidized state reforming catalyst and its preparation method, to overcome the problems in the prior art that the particle size of the catalyst platinum clusters is relatively large, and the side reactions in the catalytic reforming process are prone to coking and carbon deposition.

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  • Oxidation-state reforming catalyst and preparation method thereof
  • Oxidation-state reforming catalyst and preparation method thereof
  • Oxidation-state reforming catalyst and preparation method thereof

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preparation example Construction

[0034] The invention provides a preparation method of an oxidation state reforming catalyst, the preparation method comprising the following steps:

[0035] Step 1, preparing a tin-containing alumina carrier;

[0036] Step 2, impregnating the carrier in step 1, the impregnation temperature is 10-50°C, the impregnation solution includes platinum-containing compounds, rare earth compounds, competing adsorbents and nitrogen-containing compounds; and

[0037] Step 3, drying and activating the carrier impregnated in step 2 to obtain a reforming catalyst;

[0038] Wherein, the reforming catalyst includes 0.1-0.4 mass % of platinum, 0.1-0.6 mass % of tin, 0.05-1 mass % of rare earth and 0.3-3.0 mass % of chlorine based on the total mass of the alumina carrier on a dry basis.

[0039]In the present invention, the steps of preparing the tin-containing alumina carrier are not particularly limited, as long as the requirements of the present invention can be met. The shape of the alumin...

Embodiment 1

[0053] Take 100 grams of pseudo-boehmite (manufactured by Sasol) and an appropriate amount of deionized water with a liquid / solid mass ratio of 2, and stir at room temperature for 0.5 hour slurrying. Then add 3 milliliters of nitric acid, and a predetermined amount of stannous chloride hydrochloric acid solution, so that the Sn content in the solution is 0.30% by mass relative to the alumina on a dry basis, and acidify for 2 hours. Then drop the ball into the oily ammonia column, solidify the wet ball in ammonia water for 1 hour, then filter, wash with deionized water three times, dry at 60°C for 6 hours, dry at 120°C for 2 hours, and bake at 650°C for 4 hours in a flowing air atmosphere. Hours, the Sn-containing alumina pellet carrier was obtained.

[0054] Prepare an impregnating solution containing chloroplatinic acid, cerium nitrate, hydrochloric acid and urea according to a predetermined amount, and the contents of platinum, cerium, HCl and urea in the impregnating soluti...

Embodiment 2

[0056] Catalyst B is prepared according to the method of Example 1, except that the rare earth compound is europium nitrate in the impregnation solution, and the specific steps are as follows:

[0057] Take 100 grams of pseudo-boehmite (manufactured by Sasol) and an appropriate amount of deionized water with a liquid / solid mass ratio of 2, and stir at room temperature for 0.5 hour slurrying. Then add 3 milliliters of nitric acid, and a predetermined amount of stannous chloride hydrochloric acid solution, so that the Sn content in the solution is 0.30% by mass relative to the alumina on a dry basis, and acidify for 2 hours. Then drop the ball into the oily ammonia column, solidify the wet ball in ammonia water for 1 hour, then filter, wash with deionized water three times, dry at 60°C for 6 hours, dry at 120°C for 2 hours, and bake at 650°C for 4 hours in a flowing air atmosphere. Hours, the Sn-containing alumina pellet carrier was obtained.

[0058] Prepare an impregnating so...

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Abstract

The invention discloses an oxidation-state reforming catalyst and a preparation method thereof. The preparation method comprises the following steps that step 1, a stannous alumina carrier is prepared; step 2, the carrier in step 1 is impregnated, the impregnation temperature is 10-50 DEG C, and an impregnation solution contains a platinum-containing compound, a rare earth compound, a competitiveadsorbent and a nitrogen-containing compound; step 3, the carrier impregnated in step 2 is dried and activated to obtain the reforming catalyst; the total mass of the dry-based alumina carrier is taken as a reference, and the reforming catalyst is prepared from, by mass, 0.1-0.4% of platinum, 0.1-0.6% of stannum, 0.05-1% of rare earth and 0.3-3.0% of chlorine. The catalyst is used for a hydrocarbon catalytic reforming reaction, can reduce the generation of coke, and improve the selectivity of product arene.

Description

technical field [0001] The invention relates to a reforming catalyst and its preparation method, in particular to an oxidized reforming catalyst containing light rare earth and its preparation method. Background technique [0002] Catalytic reforming is one of the important production processes in petroleum processing, and its main purpose is to produce high-octane gasoline, BTX aromatics and cheap hydrogen. With the upgrading of gasoline and diesel quality and the rapid development of hydrogenation technology, catalytic reforming plays an increasingly important role in the refining and chemical industry. At present, the most commonly used reforming catalyst in industry is Pt-Re / Al for semi-regenerative reforming process 2 o 3 Catalyst and Pt-Sn / Al for Continuous Regenerative Reforming Process 2 o 3 . [0003] The indicators used to measure catalyst performance include activity, selectivity and stability. For reforming catalysts, the activity is the aromatic content or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135C10G35/09
CPCB01J27/135C10G35/09C10G2300/1044C10G2300/70
Inventor 潘晖华韩晓琳胡长禄
Owner PETROCHINA CO LTD
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