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Naphtha reforming catalyst and preparation method thereof

A technology for reforming catalyst and naphtha, applied in the direction of naphtha catalytic reforming, etc., can solve the problems of complex preparation process, rapid decrease of specific surface area, catalyst deactivation and so on

Inactive Publication Date: 2016-07-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical solution of the present invention is to overcome the deficiencies in the prior art that the preparation process is complicated, the catalyst activity is reduced, the specific surface area of ​​the catalyst is rapidly reduced, and the catalyst is deactivated quickly, and a kind of polymetallic naphtha heavy Whole catalyst and its preparation method

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

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preparation example Construction

[0043] The preparation method of the catalyst of the present invention comprises introducing VIII group metals, IVA group metals, rare earth additives, and IIIB group metals into the inorganic oxide carrier, and can adopt the co-impregnation method or the distribution impregnation method to introduce the metal components, halogen Introduce the vector.

[0044] When the distributed impregnation method is adopted, the elements introduced first should be Group IVA metals, Ce, and Y, and the order of introduction can be arbitrary, that is, the Group IVA metals can be introduced into the carrier first, and then Ce and Y can be introduced successively or simultaneously, or vice versa. , that is, Ce and Y are introduced simultaneously or successively and then the IVA group metals are introduced. Ce, Y and IVA group metals can also be introduced at the same time. When Ce and Y are introduced in a distributed manner, the introduction order of Ce and Y can be arbitrary.

[0045] After e...

Embodiment 1

[0057] Preparation of Catalyst A: Pt-Sn-Ce-Y / Al 2 o 3 -Cl

[0058] The spherical alumina support was prepared by the oil drop method known to those skilled in the art. Firstly, the aluminum hydrosol is obtained by the reaction of metal aluminum and fatty alcohol under the action of an initiator, which is mixed with appropriate gelatin and dropped into a high-temperature oil bath until it solidifies and forms small balls. Put the pellets in the solution of oil and ammonia for aging treatment, dry at 50°C-300°C for 12 hours, and then roast at 400°C-600°C for 1 hour-24 hours to obtain spherical gamma -Al 2 o 3 carrier.

[0059] Take the above spherical γ-Al 2 o 3 Carrier 100g, put it in SnCl 2 In an ethanol solution, impregnate to obtain a Sn-containing carrier with a Sn content of 0.3%.

[0060] Take 100g of the carrier, and make hydrochloric acid, chloroacetic acid, cerium chloride, and yttrium chloride into an aqueous solution, so that the aqueous solution contains 1....

Embodiment 2

[0065] Preparation of Catalyst B: Pt-Sn-Ce-Y / Al 2 o 3 -Cl

[0066] Catalyst B was prepared in a manner similar to that of Example 1, except that the Ce content on the catalyst was 0.41%, and the rest of the active components had the same composition. The catalyst precursor after the impregnating solution was dried at 500°C, H 2 O: Cl 2 : HCl molar ratio of 50:5:1 in the air roasting.

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Abstract

The invention belongs to the technical field of catalyst and relates to a naphtha reforming catalyst and its preparation method. The catalyst comprises a carrier and VIII group metal, IVA group metal, rare-earth metals Ce and Y and a halogen component. The method comprises the following steps: gamma-alumina is respectively contacted with solutions containing Ce and Y to make the carrier adsorb Ce and Y and is then contacted with VIII group metal, and the carrier needs to be dried and roasted after each time of contact. The invention has the following advantages: the catalyst has high aromatics selectivity, liquid yield and stability and low carbon deposit rate.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a naphtha reforming catalyst and a preparation method thereof, in particular to a preparation method of a polymetallic reforming catalyst. Background technique [0002] Catalytic reforming is one of the main processes of petroleum refining. The main purpose is to use naphtha as raw material to produce high-octane gasoline blending components or aromatics, and at the same time produce cheap hydrogen as a by-product. Usually, the main reactions such as dehydrogenation of six-membered naphthenes, dehydroisomerization of five-membered naphthenes, dehydrocyclization of straight-chain alkanes, and isomerization of straight-chain alkanes mainly occur in the catalytic reforming process, as well as hydrocracking, hydrogenolysis And side reactions such as carbon deposition. Among them, the dehydrogenation reaction of six-membered naphthenes only requires the catalyst to have the metal fun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63C10G35/09
Inventor 李金潘晖华胡长禄张鹏李知春
Owner PETROCHINA CO LTD
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