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Preparation method of catalyst for alkylation of benzene and methanol

An alkylation and catalyst technology, applied in the field of preparation of HZSM-5 molecular sieve catalyst, can solve the problems of complex separation process and high production cost

Inactive Publication Date: 2017-08-04
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As an important basic chemical intermediate and product, toluene has a wide range of industrial uses and considerable economic benefits. At present, the main production processes to obtain toluene are coal tar fractionation and oil aromatization, because there is a small amount of methyl thiophene mixed in its production and alkanes, making the separation process complicated and the production cost high

Method used

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  • Preparation method of catalyst for alkylation of benzene and methanol
  • Preparation method of catalyst for alkylation of benzene and methanol
  • Preparation method of catalyst for alkylation of benzene and methanol

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Put 15g of ZSM-5 (SiO 2 / Al 2 O 3 =25) As for 0.5mol / L of NH 4 NO 3 Stir in the solution for 60 minutes at 60°C, and then perform suction filtration and washing. Perform the above three times, drying at 110°C for 9 hours, and calcining at 510°C for 5 hours to obtain hydrogen form HZSM-5;

[0027] (2) Using 1% by weight Ce(NO 3 ) 3 The HZSM-5 obtained in step (1) is fully immersed in the solution in an equal volume under normal pressure, left standing at room temperature for 8 hours, dried at 125°C for 9 hours, and calcined at 530°C for 6 hours to obtain Ce-ZSM-5;

[0028] (3) The weight percentage of Ce-ZSM-5 molecular sieve obtained in step (2) is 4:1 γ-Al 2 O 3 Mix and add 1% dilute nitric acid with a mass concentration of 1%, extrude into a strip, grind and sieve 25 mesh particles after drying, dry at 110°C for 8 hours, and calcinate in a muffle furnace at 520°C for 6 hours to form Ce-ZSM-5.

Embodiment 2

[0030] The step method is the same as in Example 1, except that step (2) uses 4% by weight Ce(NO 3 ) 3 Solution.

Embodiment 3

[0032] (1) Put 15g of ZSM-5 (SiO 2 / Al 2 O 3 =38) As for 2mol / L of NH 4 NO 3 Stir in the solution for 120 minutes at 75°C, and then perform suction filtration and washing. Perform the above three times, drying at 145°C for 8 hours, and calcining at 525°C for 6 hours, the hydrogen type HZSM-5;

[0033] (2) Using 2% by weight Ce(NO 3 ) 3 The HZSM-5 obtained in step (1) is fully immersed in the solution in an equal volume under normal pressure, left standing at room temperature for 12 hours, dried at 125°C for 9 hours, and calcined at 540°C for 6.5 hours to obtain Ce-ZSM-5;

[0034] (3) The weight percentage of Ce-ZSM-5 molecular sieve obtained in step (2) is 5:3γ-Al 2 O 3 Mix and add dilute nitric acid with a mass concentration of 2%, extrude and shape, grind and sieve 40-mesh particles after drying, dry at 135°C for 14h, and calcinate in a muffle furnace at 545°C for 7h to form Ce-ZSM-5.

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Abstract

The invention discloses a preparation method of a catalyst for the alkylation of benzene and methanol. The method comprises the following steps: performing ion exchange on ZSM-5 molecular sieve raw powder through NH4NO3 solution, then performing drying and calcination to obtain hydrogen type HZSM-5, loading HZSM-5 with Ce(NO3)3 and Nd(NO3)3 solution by adopting an incipient-wetness impregnation method to obtain Ce-ZSM-5 and Nd-ZSM-5, and finally performing treatment by gama-Al2O3 and dilute nitric acid, so as to obtain formed C2-ZSM-5 and Nd-ZSM-5.

Description

Technical field [0001] The invention relates to a preparation technology of a HZSM-5 molecular sieve catalyst modified by rare earth metals Ce and Nd. Background technique [0002] my country's benzene and toluene are mainly derived from catalytic reformate, pyrolysis gasoline and coking light oil, and methanol is mainly derived from coal chemical industry and natural gas synthesis, and the production capacity is relatively large. If the alkylation reaction is used to combine the two to produce high value-added products such as toluene and xylene, it will open up new ways for the utilization of raw materials. [0003] Paraxylene is mainly used to produce terephthalic acid and methyl terephthalate, and is an important raw material for the production of polyester products. The current production methods of p-xylene are mainly xylene isomerization, toluene disproportionation or toluene and C 9 Aromatic alkylation transfer, etc., can obtain high-purity p-xylene through adsorption sepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40
CPCB01J29/405B01J2229/186
Inventor 李贵贤杜知松季东王东亮董鹏郭永圻李发达
Owner LANZHOU UNIVERSITY OF TECHNOLOGY