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Naphtha reforming catalyst and preparation method therefor

A reforming catalyst and catalyst technology, applied in naphtha catalytic reforming, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as easy carbon deposition and deactivation, and achieve high isoparaffin selectivity and good aromatics The effect of constitutive selectivity

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Naphtha reforming catalyst and preparation method therefor
  • Naphtha reforming catalyst and preparation method therefor
  • Naphtha reforming catalyst and preparation method therefor

Examples

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preparation example Construction

[0028] 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.

[0029] 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 80, 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

[0061] Prepare mesoporous alumina by the method of the present invention

[0062] 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.

[0063] 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.

[0064] 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

[0066] 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.

[0067] 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

The invention relates to a naphtha reforming catalyst. The naphtha reforming catalyst comprises a complex carrier and the following active ingredients in percentage by mass (based on the carrier): 0.04-3.0% of platinum, 0.04-5.0% of VII group B metal and 0.5-5.0% of halogen; the complex carrier contains the ingredients in percentage by mass: 0-80% of gamma-alumina and 20-100% of mesoporous gamma-alumina; and a preparation method for the mesoporous gamma-alumina comprises the steps of mixing a template agent, fatty alcohol, inorganic acid and an aluminum source compound, carrying out a full reaction at the pH value of 1 to 7 and the temperature of 1 DEG C to 100 DEG C, drying a reaction product, carrying out roasting for 2 to 12 hours at the temperature of 300 DEG C to 600 DEG C so as to obtain amorphous mesoporous alumina, then, dipping the amorphous mesoporous alumina by a platiniferous compound solution, drying solids, and then, carrying out roasting at the temperature of 300 DEG C to 700 DEG C, wherein the template agent is a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, the mole ratio of the template agent to the aluminum source compound is 1: (1 to 200), and the mole ratio of the fatty alcohol to the aluminum source compound is (20 to 100): 1. The catalyst has relatively high selectivity of isomerization and aromatization.

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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