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

A reforming catalyst, semi-regeneration technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy aggregation and weak adsorption of metal components , to achieve the effects of not easy to aggregate, less methane, and good activity

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

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Problems solved by technology

[0011] The purpose of the present invention is to provide a polymetallic semi-regenerative reforming catalyst and its preparation method to solve the problem of weak adsorption of metal compounds on the surface of the carrier and easy aggregation of metal components in the prior art

Method used

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

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preparation example Construction

[0033] The present invention also provides a method for preparing a polymetallic semi-regenerative reforming catalyst, comprising the steps of:

[0034] Step 1, preparing a strip-shaped alumina carrier, the alumina being γ-alumina prepared from aluminum hydroxide obtained by hydrolysis of alkoxy aluminum;

[0035] Step 2, preparing an impregnation solution, which contains platinum compounds, rhenium compounds, light rare earth compounds, competitive adsorbents and ammonium salts;

[0036] Step 3, impregnating the alumina carrier, and then drying;

[0037] Step 4, catalyst activation to obtain catalyst oxidation state precursor; and

[0038] Step 5, reducing and presulfiding the catalyst oxidation state precursor.

[0039] The preparation method of the semi-regenerated reforming catalyst of the present invention, wherein, the oxidation state precursor of the catalyst contains 5% H 2 In the flowing Ar atmosphere, the TPR (temperature programmed reduction) test was carried out...

Embodiment 1

[0058] 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.

[0059] Prepare an impregnating solution containing chloroplatinic acid, perrhenic acid, lanthanum nitrate, hydrochloric acid and tetramethylammonium bromide according to a predetermined amount, and the content of platinum, rhenium, lanthanum, HCl and ammonium salt in the impregnating solution is oxidized on a dry basis The aluminum mass is respectively 0.24%, 0.45%, 0.44%, 1.2% and 4.6%. The impreg...

Embodiment 2

[0061] Catalyst B was prepared according to the method of Example 1, except that the rare earth compound was europium nitrate, and the contents of platinum, rhenium, europium, HCl and ammonium salt in the impregnation solution were respectively 0.21% and 0.21% relative to the mass of alumina on a dry basis , 0.21%, 1.6% and 3.3%. The liquid / solid ratio of the impregnating liquid to the carrier is 1.1, the impregnating temperature is 35° C., and the impregnating time is 1 hour. Specifically:

[0062] 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 ba...

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Abstract

The invention discloses a polymetallic 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, preparation of impregnation solution, which contains platinum compound, rhenium compound, light rare earth compound, competitive adsorbent and ammonium salt; Step 3, impregnation of alumina carrier, and then drying; Step 4, catalyst activation obtaining the catalyst oxidation state precursor; 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, and the metal components in the catalyst are not easy to aggregate. The particle size is small, and it has good activity and selectivity. And stability, 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 multi-metal reforming catalyst and a preparation method thereof, in particular to a light rare earth-containing semi-regenerated 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 . [0003] The indicators used to measure catalyst performance include activity, selectivity and stability. For reforming catalysts, the acti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/13C10G35/085
CPCB01J23/005B01J27/13C10G35/085
Inventor 潘晖华赵悦陈世安潘乃俊胡维军
Owner PETROCHINA CO LTD
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