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Hydrocarbon reforming catalyst containing mesoporous molecular sieve and preparation method thereof

A mesoporous molecular sieve and reforming catalyst technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of excessive cracking activity, harsh reaction environment requirements, and affecting aromatics yield and liquid yield and other problems, to achieve high yield of aromatics and increase the yield of isoparaffins

Active Publication Date: 2018-06-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the shortcomings of these two types of catalysts are that the basic Pt / KL catalyst has poor anti-coking and anti-sulfur performance, and has strict requirements on the reaction environment; conventional silica-alumina molecular sieves such as ZSM-5 are too acidic and are used for reforming reactions. When , it shows too strong cracking activity, which affects the aromatics yield and liquid yield of the reaction

Method used

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  • Hydrocarbon reforming catalyst containing mesoporous molecular sieve and preparation method thereof
  • Hydrocarbon reforming catalyst containing mesoporous molecular sieve and preparation method thereof
  • Hydrocarbon reforming catalyst containing mesoporous molecular sieve and preparation method thereof

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preparation example Construction

[0033] The preparation method of catalyst of the present invention comprises:

[0034] (1) Make an impregnating solution with a compound containing Group IIIA metals, impregnate a mesoporous molecular sieve, dry and roast the solid, then use a cationic compound containing a platinum group metal to make an impregnating solution, dry and roast the solid to obtain a molecular sieve catalyst,

[0035] (2) impregnating the alumina carrier with an impregnating solution containing an anion containing a platinum group metal compound, a VIIB group metal compound and a halogen, drying the impregnated solid, calcining, reducing, and presulfiding to obtain an alumina catalyst,

[0036] (3) Mix the molecular sieve catalyst prepared in step (1) with the alumina catalyst prepared in step (2) according to the mass ratio of 1-5:1-30.

[0037] In the above method, step (1) is to prepare a molecular sieve catalyst, and the compound containing Group IIIA metal is preferably gallium nitrate hydra...

example 1

[0052] (1) Preparation of SBA-15 molecular sieve

[0053] Dissolve 100g of polyethylene oxide-polypropylene oxide-polyethylene oxide (template agent, referred to as P123, molecular weight 5800, produced by Aldrich, USA) in 2250mL of deionized water, add 1500g of hydrochloric acid with a concentration of 4mol / L Stir evenly, slowly add 212.5 g of ethyl orthosilicate at 40° C., and stir for 4 hours. Then the obtained mixture was transferred into an autoclave, aged at 140°C for 24 hours, filtered, washed, dried at 120°C for 8 hours, and calcined at 550°C for 4 hours to obtain a white powder, which was SBA-15 molecular sieve.

[0054] (2) Preparation of Ga / SBA-15 molecular sieve

[0055] Ga (NO 3 ) 3 The solution was prepared with an appropriate amount of deionized water to make an impregnation solution, so that the Ga content in it was 1.0% by mass (relative to the mass of the molecular sieve on a dry basis), the liquid / solid volume ratio was 5: 1, and the SBA-15 molecular siev...

example 2

[0063] (1) Preparation of MCM-41 molecular sieve

[0064] Take 9.9g of cetyltrimethylammonium bromide, add 205.1mL of deionized water, and stir at 60°C for 0.5 hours. 140.7 mL of ammonia water with a concentration of 25% by mass was added dropwise, stirring was continued for 0.5 hours, 50.4 mL of ethyl orthosilicate and 205.1 mL of deionized water were added, and stirring was continued for 6 hours. The obtained mixture was transferred into an autoclave, aged at 110°C for 4 days, filtered and washed, dried at 120°C for 8 hours, and calcined at 550°C for 4 hours to obtain a white powder, which was MCM-41 molecular sieve.

[0065] (2) get MCM-41 molecular sieve, use Ga(NO by the method of example 1 (2) step 3 ) 3 The supported gallium is impregnated with the solution, dried and calcined to prepare the MCM-41 molecular sieve containing 1.0 mass% Ga (relative to the mass of the molecular sieve on a dry basis).

[0066] (3) get the MCM-41 molecular sieve that contains 1.0 mass % ...

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Abstract

A hydrocarbon reforming catalyst containing molecular sieves, comprising a molecular sieve catalyst with a mass ratio of 1 to 5:1 to 30 and an alumina catalyst whose carrier is alumina, and the molecular sieve catalyst includes a content calculated on the basis of dry molecular sieves The following active components: 0.1-5.0% by mass of platinum group metals, 0.1-4.0% by mass of group IIIA metals, the molecular sieve is a mesoporous molecular sieve with a pore diameter of 2-50nm; the alumina catalyst includes The following active components are calculated based on alumina: 0.1-4.0% by mass of platinum group metals, 0.1-5.0% by mass of group VIIB metals, and 0.5-10.0% by mass of halogens. The catalyst is suitable for the catalytic reforming reaction of hydrocarbons and naphtha, has higher yields of isoparaffins and aromatics, and has a simple preparation method and easy operation.

Description

technical field [0001] The present invention is a reforming catalyst and its preparation method, specifically, a hydrocarbon reforming catalyst containing molecular sieve and its preparation method. Background technique [0002] Catalytic reforming is a process of producing high-octane gasoline blending components, light aromatics and cheap hydrogen under certain reaction conditions and the action of a catalyst, using naphtha fractions as raw materials. Most of the reforming catalysts currently used in industry are composed of active components (platinum), cocatalysts (such as rhenium, tin, etc.) and acidic supports (such as halogen-containing γ-Al 2 o 3 ), this type of catalyst has been extensively and intensively studied for more than half a century since its invention. According to the concept of "theoretical yield" to measure the development process and level of catalytic reforming of platinum-containing catalysts, the actual yield of reforming reaction under the exist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/035B01J29/74C10G35/095
Inventor 王涛张大庆臧高山张玉红王嘉欣
Owner CHINA PETROLEUM & CHEM CORP
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