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Continuous reforming catalyst and preparation method thereof

A technology for reforming catalysts and catalysts, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as weak interaction between metal components and supports, easy aggregation of metal components, etc. Achieve the effects of not easy to aggregate, high selectivity, and enhanced interaction

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

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a continuous reforming catalyst and its preparation method to solve the problems in the prior art that the interaction between the metal component and the carrier in the catalyst is not strong and the metal component is easy to aggregate

Method used

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  • Continuous reforming catalyst and preparation method thereof
  • Continuous reforming catalyst and preparation method thereof
  • Continuous reforming catalyst and preparation method thereof

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preparation example Construction

[0028] The present invention provides a kind of preparation method of continuous reforming catalyst, comprises the following steps:

[0029] Step 1, preparing a tin-containing alumina carrier;

[0030] Step 2, preparing an impregnation solution, which includes a platinum-containing compound, a competing adsorbent and a nitrogen-containing compound;

[0031] Step 3, impregnating the carrier in step 1 and evaporating the impregnating solution to dryness at a temperature of 50-60°C, and

[0032] Step 4, the catalyst is dried, activated and reduced to obtain a multi-metal reforming catalyst.

[0033] In the preparation method of the continuous reforming catalyst described in the present invention, in step 1, the alumina support can be prepared by rolling ball or drop ball method, and the spherical alumina support can be prepared first, and then the Sn element can be introduced by the impregnation method, or it can be prepared in a spherical In the carrier preparation process, su...

Embodiment 1

[0049] 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.

[0050] An impregnating solution containing chloroplatinic acid, hydrochloric acid and urea is prepared according to a predetermined amount, and the contents of platinum, hydrochloric acid and urea in the impregnating solution are...

Embodiment 2

[0052] Catalyst B was prepared according to the method of Example 1, except that the Sn content in the carrier was 0.24% by mass relative to the dry basis alumina, and the platinum content, hydrochloric acid content and urea content in the impregnation solution were respectively 0.25% and 1.9% relative to the dry basis alumina mass. % and 1.2%. Specifically:

[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 0.24% by mass relative to the dry alumina, 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,...

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Abstract

The invention discloses a continuous reforming catalyst and a preparation method thereof. The method comprises the following steps that 1, a tin-containing alumina carrier is prepared; 2, an impregnation liquid is prepared, wherein the impregnation liquid comprises a platinum-containing compound, a competitive adsorbent and a nitrogen-containing compound; 3, the carrier in step 1 is impregnated, and the impregnation liquid is evaporated, wherein the evaporation temperature is 50-60 DEG C; 4, a catalyst is dried, activated and reduced to obtain the polymetallic reforming catalyst. Calculated with the carrier as a reference, the obtained reforming catalyst comprises, 0.01-0.4 mass% of Pt, 0.01-0.6 mass% of Sn and 0.3-3.0 mass% of Cl, wherein the Pt dispersion degree, measured by means of a hydrogen-oxygen titration approach, of the catalyst is equal to or higher than 90%. The catalyst is used for hydrocarbon catalytic reforming reactions and has good activity and selectivity and a low carbon deposition rate.

Description

technical field [0001] The invention relates to a reforming catalyst and a preparation method, in particular to a Pt-Sn continuous reforming catalyst and a 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 . The reforming catalyst is a dual-functional catalyst, which has both the hydrogenation-dehydrogenation metal function and the acid function. In the reforming catalyst, Pt is the active center of ...

Claims

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Application Information

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IPC IPC(8): B01J27/135B01J37/02B01J37/08B01J37/18C10G35/085
CPCB01J27/135B01J37/0207B01J37/08B01J37/18C10G35/085B01J35/394
Inventor 潘晖华胡长禄韩晓琳张鹏吕雉
Owner PETROCHINA CO LTD
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