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Catalyst for preparing methylbenzene by methanol conversion and preparation method and application thereof

A methanol conversion and catalyst technology, which is applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of not involving material recycling and low total conversion rate of methanol, so as to improve the thermal effect of equilibrium reaction and improve The total yield of aromatics and the effect of large amount of raw material treatment

Inactive Publication Date: 2012-03-21
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of fluidized bed technology can obtain aromatics with high selectivity and control catalyst coking; but this technology does not involve the recycling of materials, so the overall conversion of methanol is low

Method used

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  • Catalyst for preparing methylbenzene by methanol conversion and preparation method and application thereof
  • Catalyst for preparing methylbenzene by methanol conversion and preparation method and application thereof
  • Catalyst for preparing methylbenzene by methanol conversion and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The composite molecular sieve is prepared by a mixing method, and the mixed molecular sieve is SAPO-34, HZSM-5 and MOR, and the molar ratio of silicon to aluminum of the HZSM-5 molecular sieve is 50. SAPO-34, HZSM-5 and MOR molecular sieves and binder γ-Al 2 o 3 Stir well, mix evenly, and make a mixture for later use. Add 4 wt.% dilute nitric acid aqueous solution to the mixture, knead it, and then extrude it. o Dried at C, then crushed into 10-40 mesh particles, and dried at 550 o C roasting for 5 hours. The modifier elements are added to the prepared mixture by step-by-step impregnation, and the nitrate impregnation process of each modifier element is as follows: transfer an appropriate amount of small particles of the mixture to a certain concentration of the modifier In the aqueous solution of soluble salt, the ratio of the volume of the mixture particles to the volume of the impregnating liquid is 1.5, at 90 o C. Immerse for 2 hours under the condition of cont...

Embodiment 2-3

[0041] Composite molecular sieve is prepared by mixing method, the mixed molecular sieve is SAPO-34, HZSM-22 and HY or SAPO-11, molecular sieve and binder γ-Al 2 o 3 Stir well, mix evenly, and make a mixture for later use. Add 4 wt.% dilute nitric acid aqueous solution to the mixture, knead it, and then extrude it. o Dried under C, then, crush it into 10-40 mesh particles, and dry it at 500 o C roasting for 8 hours. The modifier element zinc nitrate or ammonium tungstate is added to the prepared mixture respectively by step-by-step impregnation. The impregnation process of each modifier element is as follows: transfer an appropriate amount of small particles of the mixture to a certain concentration of In the aqueous solution of the soluble salt of the modifying agent, the ratio of the volume of the mixture particles to the volume of the impregnating liquid is 2, and at 60 o C. Immerse for 3 hours under the condition of continuous stirring. After the impregnating liquid e...

Embodiment 4-5

[0044] The composite molecular sieve is prepared by a mixing method, the mixed molecular sieve is SAPO-34, HZSM-5 and EUO, and the molar ratio of silicon to aluminum of the HZSM-5 molecular sieve is 90. EUO, HZSM-5 and SAPO-34 molecular sieves and binder γ-Al 2 o 3 Stir well, mix evenly, and make a mixture for later use. Add 2 wt.% dilute nitric acid aqueous solution to the mixture, knead it, and then extrude it. o Dried at C, then crushed into 10-40 mesh particles, and dried at 550 o C roasting for 6 hours. The modifier element nitrate is added to the prepared mixture separately by step-by-step impregnation method. The impregnation process of each modifier element is as follows: transfer an appropriate amount of small particles of the mixture to a certain concentration of the modifier. In the aqueous solution of soluble salt, the ratio of the volume of the mixture particles to the volume of the impregnating liquid is 1, at 80 o C. Immerse for 3 hours under the condition ...

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Abstract

The invention discloses a catalyst for preparing methylbenzene by methanol conversion, which comprises, by weight, 30%-80% of composite molecular sieves, 0.1%-10% of modifier elements and the balance being binders. The composite molecular sieves are selected from SAPO-34, SAPO-11, HZSM-5, HZSM-22, HZSM-11, MCM-41, MCM-22, HBeta, HY, MOR or EUO; the modifier elements are selected from Cr, Mo, W, Cu, Zn, Fe, Co, Ni, Ga, Sn, Zr, Mn, Pd, Pt and Re; and the binders can be aluminum oxide, pseudoboehmite, silicone gel, silicon dioxide or diatomaceous earth. The catalyst for preparing methylbenzene by methanol conversion and a preparation method thereof have the following advantages that (1), the total recovery of methylbenzene is higher and the selectivity thereof is also higher; (2) raw material handling capacity is high; (3), non-aromatic and butylene products circularly enter a reactor to realize further reaction so that the total aromatic recovery and balanced reaction thermal effect areimproved; (4), non-aromatic liquid products can be used as solvent oil or gasoline components; and (5), the catalyst has long service life.

Description

technical field [0001] The invention relates to a catalyst for catalytically converting methanol into toluene, a preparation method and application thereof, and belongs to the technical field of catalysts and applications thereof. Background technique [0002] In recent years, my country's coal-based methanol industry has developed rapidly, and there are more than 200 methanol production enterprises, becoming the world's largest producer and consumer of methanol. However, my country's methanol production capacity is developing too fast, and the situation that the production capacity is far greater than market demand will exist for a long time. For example, in 2010, the national methanol production was about 14.8 million tons, and by the end of 2010, my country's methanol production capacity had reached at least 29.534 million tons. It is predicted that the demand for methanol will reach 25 million to 30 million tons in 2015, and the methanol production capacity will likely ...

Claims

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Application Information

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IPC IPC(8): B01J29/85C07C15/06C07C1/20
CPCY02P20/52
Inventor 张昕段超周蕊华媛
Owner NORTHWEST UNIV
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