ZSM-5 molecular sieve catalyst for catalytic preparation of xylene from coked benzene and methanol and use thereof

A ZSM-5, methanol preparation technology, applied in molecular sieve catalyst, physical/chemical process catalyst, organic chemistry and other directions, can solve the problems of low xylene selectivity, low economic benefit, low industrial production use, etc. The effect of high stability, high effective conversion rate and high selectivity

Active Publication Date: 2015-09-02
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these two patents, the former only proposes a process method, but does not discuss in detail the key technology catalyst, and its product is mainly toluene, the economic benefit is relatively low, and the industrial production use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1. An efficient catalyst for catalyzing the alkylation reaction of coked benzene and methanol

[0023] Take Na 2 O content is less than 0.05wt%, SiO 2 / Al 2 O 3 16 grams of hydrogen type ZSM-5 molecular sieve powder with a molar ratio of 30, add 8.5g of alumina as a binder and 0.35g of sesame powder, mix and stir uniformly and extrude into shape, dry and roast, cut into pellets, and use analytical pure lanthanum nitrate The aqueous solution is excessively impregnated, dried, and calcined to obtain catalyst A.

Example Embodiment

[0024] Example 2. An efficient catalyst for catalyzing the alkylation reaction of coked benzene and methanol

[0025] Take Na 2 O content is less than 0.05wt%, SiO 2 / Al 2 O 3 19.35g of hydrogen type ZSM-5 molecular sieve powder with a molar ratio of 60, add 10.2g of binder alumina and 0.45g of sesame powder, mix and stir uniformly and extrude into shape, dry and roast, cut into pellets, use analytical pure cerium nitrate Excessive immersion, drying, and roasting in the aqueous solution of TiO2 to prepare catalyst B.

Example Embodiment

[0026] Example 3. An efficient catalyst for catalyzing the alkylation reaction of coked benzene and methanol

[0027] Take Na 2 O content is less than 0.05wt%, SiO 2 / Al 2 O 3 19.35g of hydrogen type ZSM-5 molecular sieve powder with a molar ratio of 80, add 10.2g of binder alumina and 0.45g of sesame powder, mix and stir uniformly and extrude into shape, dry and roast, cut into pellets, use analytical pure cerium nitrate And lanthanum nitrate mixture aqueous solution is excessively impregnated, dried and roasted to prepare catalyst C.

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Abstract

The invention provides a ZSM-5 molecular sieve catalyst for catalytic preparation of xylene from coked benzene and methanol and a use thereof. A preparation method of the ZSM-5 molecular sieve catalyst comprises blending 45-90wt% of a hydrogen-type ZSM-5 molecular sieve, 10-50wt% of a binder, 1-20wt% of sesbania cannabina powder and a dilute nitric acid solution as an assistant by stirring to obtain a uniform mixture, drying and roasting the mixture, extruding the mixture to obtain a strip, immersing the strip in a solution containing one or two of Mg, Zn, Gd, P, La, Ce, Mo and Ni, and carrying out drying and roasting so that the strip is loaded with the metals. In catalytic alkylation reaction preparation of xylene from coked benzene and methanol, the ZSM-5 molecular sieve catalyst has high catalytic activity, high stability, a high raw material effective conversion rate and high desired product xylene selectivity, improves the existing xylene production technology, improves a coal-derived coked benzene utilization rate and realizes change of waster into valuables.

Description

technical field [0001] The invention relates to a molecular sieve catalyst, in particular to a ZSM-5 molecular sieve catalyst which catalyzes the coking of benzene and methanol to prepare xylene and its application. Background technique [0002] Xylene is an important basic chemical raw material, which is widely used as a solvent in coatings, resins, dyes, inks and other industries; as a synthetic monomer or solvent in pharmaceuticals, explosives, pesticides and other industries; it can also be used as high-octane gasoline It is an important raw material of organic chemical industry. It can also be used to remove asphalt from car bodies. Hospital pathology departments mainly use preparations. It can also be used for dehydration and dewaxing. Adsorption, separation and isomerization of xylene can also obtain p-xylene PX, and terephthalic acid PTA can be obtained from p-xylene after oxidation, and terephthalic acid can be further synthesized into important polymer materials...

Claims

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Application Information

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IPC IPC(8): B01J29/40C07C15/08C07C2/88
CPCY02P20/52
Inventor 任相坤崔永君王培黄国胜荣斌斌
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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