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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The application of crystalline aluminosilicate molecular sieve catalysts modified by surface silanization in the process of producing gasoline from methanol and dimethyl ether has not been reported so far

Method used

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  • Preparation method of molecular sieve catalyst

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preparation example Construction

[0015] The preparation method of the molecular sieve catalyst provided by the present invention comprises the steps of carrying out pickling treatment and surface silanization treatment on the molecular sieve with crystalline aluminosilicate structure. The prepared catalyst has excellent catalytic activity and is applicable to methanol, dimethyl In the method of converting ether into gasoline components, it has the advantages of high selectivity of the target product and good repeatability of catalytic performance. The preparation method of the catalyst is simple, easy to operate, and easy to realize industrial scale-up.

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

Embodiment 1

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

[0033] Dissolve 0.19g of 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane in 200g of ethanol to form a solution, then react Z1 with the above solution at 70°C under reflux, and then dry at 120°C 4 hours, baked at 540°C for 24h in flowing air to obtain Ga 2 o 3 The content is 10% by weight, and silanized (SiO 2 ZSM-5 molecular sieve A with a loading of 0.05% by weight). The composition and preparation parameters of the catalyst are s...

Embodiment 2

[0035] 100mL of Ca(NO with a concentration of 0.45mol / L 3 ) 2 (analytical pure, Shanxi Dongxing Chemical Co., Ltd.) and 33.77g, 3.7% by weight of HCl (analytical pure, produced by Beijing Chemical Plant, the same below) were evenly mixed. Add 57.33g ZSM-5 molecular sieves (production of 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, filtered, dried at 120°C for 4 hours, and then calcined at 550°C for 4 hours to obtain ZSM-5 molecular sieve Z2 containing calcium.

[0036] Dissolve 8.33g of tetrabutyl silicate in 150g of n-hexane to form a solution, then react Z2 with the above solution at 70°C under reflux, then dry at 120°C for 4 hours, and calcinate at 540°C for 24 hours in flowing air , to get CaO 2 The content is 2.67% by weight and silanized (SiO 2 ZSM-5 molecular sieve B with a loading of 3.0% by weight). The composition and preparation parameters of the catalyst are shown in Tabl...

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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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