A multi-metal catalyst for naphtha reforming and a preparing method thereof

A reforming catalyst and naphtha technology, which is applied in the direction of naphtha catalytic reforming, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy carbon deposition and deactivation, and achieve high isoparaffin selectivity, Good aromatization selectivity effect

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] For the carrier γ-Al commonly used in industry at present 2 o 3 , in order to adjust its acidic function, CN96103410.6, CN200610144205.2 disclose the reforming catalyst containing molecular sieve, introduce β molecular sieve, SAPO molecular sieve to improve catalyst performance in active alumina carrier, but this kind of microporous molecular sieve often causes catalyst to have Strong cracking activity, and the product is easily restricted by molecular sieve channels, easy to deactivate by carbon deposition

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  • A multi-metal catalyst for naphtha reforming and a preparing method thereof
  • A multi-metal catalyst for naphtha reforming and a preparing method thereof
  • A multi-metal catalyst for naphtha reforming and a preparing method thereof

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preparation example Construction

[0025] The preparation method of the mesoporous γ-alumina of the present invention is as follows: first mix template agent, fatty alcohol, inorganic acid and aluminum source compound, react under the condition of pH 1-7, after drying the reactant, Roast at 300-600°C, preferably 350-450°C, preferably for 2-6 hours, remove the template agent, generate amorphous mesoporous alumina, then impregnate and introduce an appropriate amount of platinum, after drying, heat at 300-700°C, preferably 350- Mesoporous γ-alumina is obtained by calcining at 450°C, and the calcining time is preferably 2 to 12 hours.

[0026] Among the raw materials used in the method of the present invention, the molar ratio of the template agent to the aluminum source compound is preferably 1:20 to 100, and the molar ratio of the fatty alcohol to the aluminum source compound is preferably 20 to 60:1. Add the template agent to the fatty alcohol to dissolve it, Then add inorganic acid to adjust the pH value of the...

example 1

[0058] Prepare mesoporous alumina by the method of the present invention

[0059] Get the MA-400 mesoporous amorphous alumina that 20g comparative example 1 makes, impregnate 24 hours at 25 ℃ with the impregnating solution that chloroplatinic acid is made into, contain the Pt of 0.05% in the impregnating solution (relative to the quality of alumina on a dry basis ), the liquid / solid volume ratio was 2:1, filtered, the obtained solid was dried at 120°C for 8 hours, and calcined in air at 400°C for 4 hours to obtain the carrier MA-400-005, and its specific surface area is shown in Table 1.

[0060] For the small angle XRD spectrum (0.5~5°) of MA-400-005 see figure 1 In the curve c, the characteristic diffraction peak of the (100) plane appears in this curve, indicating the existence of mesoporous structure.

[0061] MA-400-005 wide angle XRD spectrum (10~70°) such as image 3 As shown in the middle b curve, there are more obvious crystal diffraction peaks, indicating that the ...

example 2

[0063] Mesoporous alumina was prepared according to the method of Example 1, except that the prepared impregnation solution contained 0.10% Pt (relative to the mass of alumina on a dry basis), and the carrier MA-400-010 was obtained. The specific surface area is shown in Table 1.

[0064] The wide-angle XRD spectrum (10-70°) of MA-400-010 is as follows image 3 As shown in the middle c curve, there are more obvious crystal diffraction peaks, indicating that the amorphous alumina has transformed into γ-Al 2 o 3 crystal phase structure.

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Abstract

A multi-metal catalyst for naphtha reforming is disclosed. The catalyst comprises a composite carrier and active components the contents of which are calculated based on the carrier. The active components comprise 0.04-3.0% by mass of platinum, 0.04-5.0% by mass of a VIIB-group metal, 0.01-3.0% by mass of a third metal component and 0.5-5.0% by mass of a halogen. The third metal component is selected from rare earth elements, indium or yttrium. The composite carrier comprises 0-80% by mass of gamma-aluminium oxide and 20-100% by mass of mesoporous gamma-aluminium oxide. A preparing method of the mesoporous gamma-aluminium oxide includes dipping amorphous mesoporous aluminium oxide with a solution of a platinum-containing compound, filtering to obtain solid, drying the solid and calcinating at 300-700 DEG C. A template is poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer. The mole ratio of the template to an aluminum source compound is 1:1-200. The mole ratio of aliphatic alcohol to the aluminum source compound is 20-100:1. The catalyst is used for naphtha reforming and is high in isomerization activity and good in aromatization selectivity.

Description

technical field [0001] The invention relates to a hydrocarbon conversion catalyst and a preparation method thereof, in particular to a naphtha reforming catalyst and a preparation method thereof. Background technique [0002] Catalytic reforming is based on C 6 ~C 11 The naphtha fraction is used as the raw material, and under certain temperature, pressure, presence of hydrogen and catalyst, the raw material hydrocarbon molecules undergo reforming reactions such as cycloalkane dehydrogenation, linear paraffin dehydrogenation isomerization, and paraffin dehydrocyclization , the process of producing high-octane gasoline blending components or aromatics with cheap hydrogen as a by-product. Currently, supported dual-functional reforming catalysts widely used in catalytic reforming processes include hydrogenation / dehydrogenation functions provided by metal components and acidic isomerization functions provided by supports. The reforming catalyst is usually a dual (multi)metal c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/13C10G35/09
Inventor 张大庆王涛臧高山张玉红王嘉欣
Owner CHINA PETROLEUM & CHEM CORP
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