Catalyst for catalyzing synthesis gas and benzene to prepare methylbenzene and xylene and preparation method thereof

A catalyst and synthesis gas technology, applied in the chemical field, can solve the problems of low xylene selectivity, low benzene conversion rate, expensive precious metals, etc., and achieve the effects of improved selectivity, low preparation cost, and strong repeatability

Active Publication Date: 2020-05-19
NORTHWEST UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0008] Chinese patent CN104945219A adopts RuO 2 /ZSM zeolite, RbO 2 /Mordenite, PdO/Beta Molecular Sieve and Fe 2 o 3 /NbOPO 4 (SnOPO 4 ) etc. are used as catalysts for the alkylation reaction of synthesis gas and benzene t

Method used

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  • Catalyst for catalyzing synthesis gas and benzene to prepare methylbenzene and xylene and preparation method thereof
  • Catalyst for catalyzing synthesis gas and benzene to prepare methylbenzene and xylene and preparation method thereof
  • Catalyst for catalyzing synthesis gas and benzene to prepare methylbenzene and xylene and preparation method thereof

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Embodiment Construction

[0031] The present invention will be specifically introduced below in conjunction with specific embodiments.

[0032] 1. Preparation of double metal oxide ZnO-ZrO 2 solid solution

[0033] Weigh Zn(NO 3 ) 2 ·6H 2 O and Zr(NO 3 ) 4 ·5H 2 O, then dissolve the two in deionized water; add urea solution to the above solution; under continuous stirring, raise the temperature to 110°C and keep it for 8h; cool down, let it stand for aging overnight, then centrifuge and wash 3 times, and dry at 100°C overnight, and finally baked at 500°C for 4h.

[0034] In this specific example, we prepared 4 parts of ZnO-ZrO with different molar ratios (i.e. metal ratios) of Zn / (Zn+Zr) 2 solid solution, as follows:

[0035]

[0036]

[0037] With Cd(NO 3 ) 2 4H 2 O and Zr(NO 3 ) 4 ·5H 2 O as raw material, or, with Ga(NO 3 ) 3 ·xH 2 O and Zr(NO 3 ) 4 ·5H 2 O is the raw material, and the same method can be used to prepare CdO-ZrO with different molar ratios of Cd / (Cd+Zr) or G...

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Abstract

The invention discloses a catalyst for catalyzing synthesis gas and benzene to prepare methylbenzene and xylene and a preparation method thereof. The catalyst is composed of a bimetallic oxide and anHZSM-5 molecular sieve with a silica-alumina ratio of 10 to 100, wherein the bimetallic oxide is an AxOy-ZrO2 solid solution, A is Zn, Cd or Ga, the molar ratio of A to (A + Zr) is 0.01-0.4, and the amount of the AxOy-ZrO2 solid solution accounts for 10-60 wt% of the total amount of the catalyst. The catalyst has the beneficial effects that the catalyst is applied to the reaction of preparing methylbenzene and xylene through alkylation reaction of synthesis gas and benzene, and has high activity and high selectivity.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst for catalyzing synthesis gas and benzene to produce toluene and xylene and a preparation method thereof, belonging to the field of chemical technology. Background technique [0002] Light aromatics such as benzene, toluene, and xylene are important organic chemical raw materials, accounting for one-third of the market share in the petrochemical field. [0003] Today, about 70% of the global supply of benzene, toluene and xylene comes from naphtha cracking and reforming. [0004] Due to the increasing shortage of petroleum resources, some technologies for the production of benzene, toluene and xylene without naphtha as raw materials have gradually developed, such as: methanol to aromatics, benzene and methanol to produce toluene and xylene, toluene and methanol Alkylation of xylene and so on. Although these newly developed technologies no longer consume o...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J37/03C07C1/04C07C31/04C07C2/86C07C15/06C07C15/08
CPCB01J29/405B01J37/031C07C1/0425C07C2/864B01J2229/18C07C31/04C07C15/06C07C15/08Y02P20/52
Inventor 代成义赵潇石轩代天富杨东元
Owner NORTHWEST UNIV
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