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Catalyst for alkylation of benzene and methanol, and preparation and application thereof

A technology of alkylation and catalyst, applied in the field of catalyst and its preparation and application, can solve rare problems and the like

Inactive Publication Date: 2012-09-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shape-selective reaction of toluene and methanol on ZSM-5 zeolite to generate p-xylene has been widely studied, but there are few reports on the direct alkylation reaction of methanol and benzene

Method used

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  • Catalyst for alkylation of benzene and methanol, and preparation and application thereof
  • Catalyst for alkylation of benzene and methanol, and preparation and application thereof
  • Catalyst for alkylation of benzene and methanol, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 15g of Na-type MCM-56 zeolite, and use 2N NH at 85±10°C 4 NO 3 The carrier was ion-exchanged with 300 mL of the solution for 6 hours, filtered, washed with 200 mL of deionized water, dried, and calcined at 540° C. for 6 hours to obtain H-type MCM-56 zeolite. Mix 10g of H-type MCM-56 zeolite with 4.286g of γ-Al 2 o 3 (Shanghai Petrochemical Research Institute) mixed, added 40mL of 4wt% nitric acid aqueous solution, kneaded, extruded, dried at 80°C for 12 hours, and roasted at 540°C in air for 6 hours to obtain a carrier. Analytical pure nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O] 0.7008g and 10ml of water were made into an impregnating solution, and the above-mentioned 3g carrier was impregnated in an equal volume at room temperature for 24 hours, dried at 120°C for 12 hours, and roasted at 500°C in air for 6 hours to obtain the catalyst, and the obtained weight ratio was: NiO / Catalyst A of Type H MCM-56 / alumina = 6 / 70 / 30.

Embodiment 2

[0022] Take 15g of Na-type MCM-56 zeolite, and use 2N NH at 85±10°C 4 NO 3 The carrier was ion-exchanged with 300 mL of the solution for 6 hours, filtered, washed with 200 mL of deionized water, dried, and calcined at 540° C. for 6 hours to obtain H-type MCM-56 zeolite. Mix 10g of H-type MCM-56 zeolite with 4.286g of γ-Al 2 o 3 (Shanghai Petrochemical Research Institute) mixed, added 40mL of 4wt% nitric acid aqueous solution, kneaded, extruded, dried at 80°C for 12 hours, and roasted at 540°C in air for 6 hours to obtain a carrier. Analytical pure ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O] 0.5520g, 10ml of water to make an impregnating solution, impregnate the above-mentioned 3g carrier in an equal volume at room temperature for 24 hours, dry at 120°C for 12 hours, and roast at 500°C in air for 6 hours to obtain the catalyst. The weight ratio obtained is: MoO 3 Catalyst B / Type H MCM-56 / Alumina = 15 / 70 / 30.

Embodiment 3

[0024] Take 15g of Na-type MCM-56 zeolite, and use 2N NH at 85±10°C 4 NO 3 The carrier was ion-exchanged with 300 mL of the solution for 6 hours, filtered, washed with 200 mL of deionized water, dried, and calcined at 540° C. for 6 hours to obtain H-type MCM-56 zeolite. Mix 10g of H-type MCM-56 zeolite with 4.286g of γ-Al 2 o 3(Shanghai Petrochemical Research Institute) mixed, added 40mL of 4wt% nitric acid aqueous solution, kneaded, extruded, dried at 80°C for 12 hours, and roasted at 540°C in air for 6 hours to obtain a carrier. Analytical pure ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O] 0.2210g and 10mL of water were made into an impregnating solution, impregnating the above-mentioned 3g carrier in equal volume at room temperature for 24 hours, drying at 120°C for 12 hours, and roasting at 500°C in air for 6 hours to obtain the catalyst, and the obtained weight ratio was: MoO 3 Catalyst C of / H type MCM-56 / alumina = 6 / 70 / 30.

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Abstract

The invention relates to a catalyst for alkylation of benzene and methanol, and preparation and application thereof. The catalyst employs H-type MCM-56 zeolite and gamma- or eta-Al2O3 as a composite carrier to load one or more selected from the group containing molybdenum, nickel, magnesium, lanthanum, boron or oxides thereof. The carrier comprises, calculated by a total weight of the carrier being 100%, 50-80% of the H-type MCM-56 zeolite and 20-50% of the Al2O3; and the loaded molybdenum, nickel, magnesium, lanthanum, boron or oxides thereof account for 3-20 wt% of the carrier. The catalyst has high conversion activity on benzene and methanol, high xylene selection, benzene conversion rate reaching more than 50%, and selectivity on toluene and xylene higher than 90%, so that the catalyst fully utilizes the resources of benzene and methanol, as well as reduces production costs on toluene and xylene.

Description

technical field [0001] The present invention relates to a catalyst for the alkylation of benzene and methanol and its preparation and application, in particular, it is a catalyst containing aluminosilicate zeolite and metal components of Group IIA, Group VIB or Group VIII, which is suitable for the alkylation of benzene and methanol Catalyst for producing toluene and xylene by methanol alkylation and its preparation method. Background technique [0002] Benzene is mainly derived from isomerization and catalytic reforming of aromatics, coal tar and by-products of ethylene production processes. In the field of coal chemical industry, as a by-product of coking gas purification, and in petrochemical industry, a large amount of benzene is also generated in the production process of ethylene. According to reports, 150,000 tons of benzene is generated for every 800,000 tons of ethylene produced. The increase of ethylene will be more than 2 million t / a, which will inevitably lead t...

Claims

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Application Information

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IPC IPC(8): B01J29/76B01J29/78B01J29/70C07C15/06C07C15/08C07C2/86
CPCY02P20/52
Inventor 徐亚荣徐新良刘健张力李其蓉
Owner PETROCHINA CO LTD
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