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Naphtha reforming catalyst and preparation method thereof

A technology for reforming catalyst and naphtha, which is applied in catalyst activation/preparation, reforming naphtha, chemical instruments and methods, etc. The effect of catalyst carbon deposition

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 main purpose of the present invention is to provide a naphtha reforming catalyst and its preparation method, so as to overcome the problem of coking and carbon deposition easily caused by catalytic reforming side reactions in the prior art

Method used

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  • Naphtha reforming catalyst and preparation method thereof
  • Naphtha reforming catalyst and preparation method thereof
  • Naphtha reforming catalyst and preparation method thereof

Examples

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preparation example Construction

[0033] The invention provides a kind of preparation method of naphtha reforming catalyst, and this preparation method comprises the steps:

[0034] Step 1, preparing a tin-containing alumina carrier;

[0035] Step 2, impregnating the carrier of step 1, the impregnating solution includes a platinum-containing compound, a competitive adsorbent and an ammonium salt; and

[0036] Step 3, drying, activating and reducing the carrier impregnated in step 2 to obtain a naphtha reforming catalyst;

[0037] Wherein, the naphtha reforming catalyst includes 0.01-0.4 mass % of platinum, 0.01-0.6 mass % of tin, and 0.3-3.0 mass % of chlorine based on the total mass of the alumina carrier on a dry basis.

[0038] The present invention does not specifically limit the steps of preparing the tin-containing alumina carrier, as long as the requirements of the present invention can be met. The shape of the alumina carrier can be strip-shaped, clover-shaped or spherical, preferably a spherical alu...

Embodiment 1

[0055] 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.

[0056] An impregnating solution containing chloroplatinic acid, hydrochloric acid and ammonium chloride was prepared according to a predetermined amount, and the contents of platinum, HCl and ammonium salt in the impregnating sol...

Embodiment 2

[0058] Catalyst B was prepared according to the method of Example 1, except that the Sn content in the carrier was 0.28% by mass relative to the dry basis alumina, and the platinum content, HCl content and ammonium salt content in the impregnation solution were respectively 0.26%, 3.0% and 1.4%. The composition and platinum cluster distribution of catalyst B obtained after hydrogen reduction are shown in Table 1.

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Abstract

The invention provides a naphtha reforming catalyst and a preparation method thereof. The preparation method comprises the following steps that 1, a tin containing aluminum oxide carrier is prepared;2, the carrier in step 1 is dipped, wherein dipping liquid contains a platinum compound, a competitive adsorbent and ammonium salt; 3, the carrier dipped in step 2 is dried, activated and reduced, andthe naphtha reforming catalyst is obtained, wherein with the total mass of the dry-basis alumina carrier as the standard, the naphtha reforming catalyst is prepared from, by mass, 0.01% to 0.4% of platinum, 0.01% to 0.6% of tin and 0.3% to 3.0% of chlorine. The catalyst is used for the naphtha catalytic reforming reaction, has good activity and selectivity and is low in carbon deposition rate.

Description

technical field [0001] The invention relates to a reforming catalyst and a preparation method thereof, in particular to a Pt-Sn naphtha reforming catalyst and a preparation method thereof. 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 acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135B01J37/02B01J37/18C10G35/085
CPCB01J27/135B01J37/0213B01J37/18C10G35/085B01J35/393
Inventor 潘晖华胡长禄韩晓琳张上桂鹏
Owner PETROCHINA CO LTD
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