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A kind of semi-regenerative reforming catalyst and preparation method thereof

A reforming catalyst and semi-regeneration technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy aggregation of metal components and weak adsorption of metal compounds, so as to achieve difficult aggregation, The effect of strong interaction and high aromatic selectivity

Active Publication Date: 2021-11-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a semi-regenerative reforming catalyst and its preparation method to solve the problem that the metal components in the catalyst in the prior art are easy to aggregate and the metal compound is weakly adsorbed on the carrier surface

Method used

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  • A kind of semi-regenerative reforming catalyst and preparation method thereof
  • A kind of semi-regenerative reforming catalyst and preparation method thereof
  • A kind of semi-regenerative reforming catalyst and preparation method thereof

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preparation example Construction

[0030] A kind of preparation method of semi-regenerated reforming catalyst, it is the preparation method of above-mentioned semi-regenerated reforming catalyst, comprises the steps:

[0031] Step 1, preparing a strip-shaped alumina carrier, the alumina being γ-alumina prepared from aluminum hydroxide obtained by hydrolysis of alkoxy aluminum;

[0032] Step 2, preparing an impregnating solution, which contains a platinum compound, a rhenium compound, a competitive adsorbent and an ammonium salt;

[0033] Step 3, impregnating the alumina carrier, and then drying;

[0034] Step 4, catalyst activation to obtain catalyst oxidation state precursor; and

[0035] Step 5, reducing and presulfiding the catalyst oxidation state precursor

[0036] In the preparation method of the semi-regenerative reforming catalyst of the present invention, in step 1, the carrier is preferably γ-alumina, more preferably γ-alumina prepared from high-purity aluminum hydroxide obtained by hydrolysis of al...

Embodiment 1

[0053] Get 300 grams of pseudo-boehmite powder (manufactured by Sasol Company), and 6 grams of fennel powder, and mix them evenly. Get 4 grams of nitric acid with a concentration of 65% by mass, 7 grams of acetic acid with a concentration of 36% by mass, and 210 grams of deionized water after mixing to form a peptizer, pour the peptizer into the mixed pseudoboehmite powder, and knead To be suitable for extruding, after extruding, 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 to obtain a strip-shaped γ-alumina carrier.

[0054] Prepare an impregnation solution containing chloroplatinic acid, perrhenic acid, hydrochloric acid, and tetramethylammonium bromide according to a predetermined amount, and the platinum content, rhenium content, HCl content and ammonium salt content in the impregnation solution are respectively 0.26% relative to the mass of dry alumina , 0.46%, 1.5% and 4.8%. Take the impregnating liquid to ...

Embodiment 2

[0056] Catalyst B was prepared according to the method of Example 1, except that the platinum content, rhenium content, HCl content and ammonium salt content in the impregnation solution were 0.22%, 0.21%, 2.1% and 2.5% relative to the mass of alumina on a dry basis, respectively. Specifically:

[0057] Get 300 grams of pseudo-boehmite powder (manufactured by Sasol Company), and 6 grams of fennel powder, and mix them evenly. Get 4 grams of nitric acid with a concentration of 65% by mass, 7 grams of acetic acid with a concentration of 36% by mass, and 210 grams of deionized water after mixing to form a peptizer, pour the peptizer into the mixed pseudoboehmite powder, and knead To be suitable for extruding, after extruding, 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 to obtain a strip-shaped γ-alumina carrier.

[0058] Prepare an impregnation solution containing chloroplatinic acid, perrhenic acid, hydrochloric ac...

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Abstract

The invention discloses a semi-regenerative reforming catalyst and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing a strip-shaped alumina carrier, and the alumina is prepared from aluminum hydroxide obtained by hydrolysis of alkoxy aluminum γ-alumina; step 2, preparing impregnating solution, which contains platinum compound, rhenium compound, competitive adsorbent and ammonium salt; step 3, impregnating the alumina carrier, and then drying; step 4, activating the catalyst to obtain the oxidation state of the catalyst body; and step 5, reducing and presulfiding the catalyst oxidation state precursor. Introducing ammonium salts into the impregnation solution can strengthen the adsorption of metal compounds on the surface of the carrier. The prepared catalyst has a strong metal-carrier interaction, the metal components in the catalyst are not easy to aggregate, the particle size of the catalyst metal components is small, and the catalyst has better performance. The activity, selectivity and stability of the product reduce the occurrence of hydrogenolysis side reactions in the reforming reaction process, the hydrogenolysis by-product methane is less, and the product aromatics are highly selective.

Description

technical field [0001] The invention relates to a reforming catalyst and a preparation method, in particular to a Pt-Re semi-regenerated 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 . [0003] The indicators used to measure catalyst performance include activity, selectivity and stability. For reforming catalysts, the activity is the aromatic content or octane number of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/13C10G35/09
CPCB01J27/13B01J37/0205B01J37/0207B01J37/0213B01J37/0236B01J37/16B01J37/20B01J37/0203C10G35/09C10G2300/1037C10G2300/1044B01J35/00B01J35/30
Inventor 潘晖华潘乃俊胡维军赵悦陈世安
Owner PETROCHINA CO LTD
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