Preparation method of molecular sieve catalyst

A molecular sieve and catalyst technology, applied in the field of catalyst preparation, can solve problems such as unreported, and achieve the effects of easy industrial amplification, high selectivity, and easy operation

Inactive Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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Problems solved by technology

[0010] The application of crystalline aluminosilicate molecular sieve catalysts modified by surface silan

Method used

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  • Preparation method of molecular sieve catalyst

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[0015] The method for preparing a molecular sieve catalyst provided by the present invention includes the steps of acid washing and surface silanization of the molecular sieve with a crystalline aluminosilicate structure. The prepared catalyst has excellent catalytic activity and is applied to methanol and dimethyl When the ether is converted into gasoline components, it has the advantages of high selectivity of the target product and good repeatability of catalytic performance. The catalyst preparation method is simple, easy to operate, and easy to realize industrial scale-up.

[0016] In the method provided by the present invention, the molecular sieves are well-known to those skilled in the art, such as silica-alumina molecular sieves, heteroatom molecular sieves and other molecular sieves containing crystalline aluminosilicate structure, specifically including ZSM-5, ZSM-45, ZSM-34 , MCM-22, Y, BETA, etc., of which ZSM-5 is preferred.

[0017] In the method provided by the pre...

Example Embodiment

[0031] Example 1

[0032] Add 50mL Ga(NO) with a concentration of 1.10mol / L 3 ) 3 (Analytical pure, Guangzhou Boyi Chemical Co., Ltd.) and 16.4mL, 0.1mol / L citric acid (industrial product, the same below) mixed uniformly, add 99.53g ZSM-5 molecular sieve (Qilu Catalyst Factory) to the above solution Production, solid content 85.0 wt%, Na 2 O<0.06%), the solution pH is 4, fully stirred at 100°C for 10 hours, filtered, dried at 120°C for 4 hours, and calcined at 550°C for 4 hours to obtain a gallium-modified ZSM-5 molecular sieve Z1 .

[0033] 0.19g 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane is dissolved in 200g ethanol to prepare a solution, then Z1 is reacted with the above solution at 70°C under reflux conditions, and then dried at 120°C 4 hours, calcined in flowing air at 540℃ for 24 hours to obtain Ga 2 O 3 The content is 10% by weight, and silanization (SiO 2 The loading amount is 0.05% by weight) of ZSM-5 molecular sieve A. The composition and preparation parameters of the ...

Example Embodiment

[0034] Example 2

[0035] Put 100mL of Ca(NO) with a concentration of 0.45mol / L 3 ) 2 (Analytical grade, Shanxi Dongxing Chemical Co., Ltd.) was mixed with 33.77g, 3.7% by weight HCl (analytical grade, produced by Beijing Chemical Plant, the same below). Add 57.33g ZSM-5 molecular sieve (produced by Qilu Catalyst Factory, solid content 85.0% by weight, Na 2 O<0.06%), the pH of the solution is 1, fully stirred at 20°C for 0.5 hours and then filtered, dried at 120°C for 4 hours, and calcined at 550°C for 4 hours to obtain ZSM-5 molecular sieve Z2 containing calcium.

[0036] 8.33g of tetrabutyl silicate was dissolved in 150g of n-hexane to prepare a solution, then Z2 was reacted with the above solution at 70°C under reflux, then dried at 120°C for 4 hours, and calcined in flowing air at 540°C for 24h , Get CaO 2 The content is 2.67 wt% and silanized (SiO 2 Load 3.0 wt%) ZSM-5 molecular sieve B. The composition and preparation parameters of the catalyst are shown in Table 1. The EDX...

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Abstract

The invention discloses a preparation method of a molecular sieve catalyst. The preparation method is characterized in that a molecular sieve with a crystallized aluminosilicate structure is subjected to acid pickling treatment and surface silanization treatment. With the method, the pore structure and the acid property of the molecular sieve can be effectively adjusted; and when used for converting methanol and dimethyl ether into gasoline components, the invention is favored to improve the selectivity of the gasoline components in the process of converting into hydrocarbon reactions.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, in particular to a method for preparing a catalyst used for converting methanol and dimethyl ether into gasoline components. Background technique [0002] In the 1980s, Mobil Corporation conducted a lot of research on methanol-to-gasoline, and successively developed fixed-bed, fluidized-bed and multi-tubular reactor types. The technical route of the fixed bed method was adopted, and industrialization was carried out in New Zealand; the technical route of the fluidized bed method was carried out with a scale of 15.9m 3 / d Medium test. The typical product distribution of fixed bed methanol production gasoline is: 43.4% for hydrocarbon products, 56.0% for water, 0.4% for carbon monoxide + carbon dioxide, and 0.2% for coke and other non-target products. The typical product distribution of gasoline produced by the fluidized bed method is: the yield of methanol + ethers is 0.2%, the yield of hydro...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J29/40B01J29/48B01J29/56B01J37/00C10G3/00
CPCY02P30/20
Inventor 付强李明罡王萍罗一斌慕旭宏宗保宁舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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