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Catalyst for methanol aromatization and preparation and application thereof

A catalyst and aromatization technology, applied in the field of methanol aromatization catalyst and preparation thereof, can solve the problems of low selectivity of BTX, rapid catalyst deactivation and the like

Active Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MTA process technology is developing rapidly in my country. For example, the process of Tsinghua University and Shanxi Institute of Coal Chemical Industry has started pilot test or applied to the demonstration plant stage, but the catalyst still has problems such as rapid deactivation and low BTX selectivity. Therefore, it is necessary to use the catalyst The design improves its stability and increases the selectivity of aromatics

Method used

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  • Catalyst for methanol aromatization and preparation and application thereof
  • Catalyst for methanol aromatization and preparation and application thereof
  • Catalyst for methanol aromatization and preparation and application thereof

Examples

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preparation example Construction

[0017] The preparation method of the catalyst provided by the invention comprises uniformly mixing the modified IM-5 / SAPO-34 composite molecular sieve and silica sol, molding, drying and roasting.

[0018] The preparation method of described modified IM-5 / SAPO-34 composite molecular sieve, comprises the steps:

[0019] (1) Silicon source, aluminum source, phosphorus source, organic template R and water are mixed to obtain SAPO-34 synthetic mother liquor, wherein the amount of silicon source is SiO 2 In terms of, the amount of aluminum source is Al 2 o 3 In terms of phosphorus sources, the amount of P 2 o 5 Calculated, the molar ratio of each material is Al 2 o 3 :P 2 o 5 : SiO 2 :R:H 2 O=1: 0.5~1.5: 0.2~2.0: 0.2~3.0: 20~70,

[0020] (2) Add the modified IM-5 molecular sieve to the SAPO-34 synthetic mother liquor prepared in step (1), stir evenly to form a mixed liquor, and the dry basis mass ratio of the added modified IM-5 molecular sieve to the synthetic mother liq...

example 1

[0048] (1) Preparation of modified H-IM-5 molecular sieve

[0049] Dissolve 1.8 g of zinc nitrate and 2.5 g of cerium nitrate in 30 mL of water, and add 20 g of SiO at 25°C 2 / Al 2 o 3 In the H-IM-5 molecular sieve raw powder with a molar ratio of 25 and a grain size of 0.5 microns, let it stand for 24 hours, dry the obtained solid at 110°C for 12 hours, and roast at 450°C for 5 hours to obtain zinc and cerium-modified IM -5 molecular sieves Zn-Ce-IM-5, wherein the zinc content as ZnO is 2.46% by mass, as Ce 2 o 3 The calculated cerium content was 4.73% by mass.

[0050] (2) Preparation of modified IM-5 / SAPO-34 composite molecular sieve

[0051] Get 17.8g pseudo-boehmite (aluminum oxide content is 90% by mass) and mix with 94.8g deionized water, add 22.5g orthophosphoric acid (containing H 3 PO 4 85 mass%) solution, after continuing to stir evenly, add 10.9g silica sol (SiO 2 Content is 40 mass %), 12g triethylamine and 12g tetraethylammonium hydroxide, stir, make SAP...

example 2

[0056]Prepare catalyst by the method for example 1, difference is (2) in step, the Zn-Ce-IM-5 molecular sieve of 137g is added in SAPO-34 synthetic mother liquor, the Zn-Ce-IM-5 molecular sieve of adding and synthetic mother liquor The ratio of dry basis mass is 1:0.25, in the Zn-Ce-IM-5 / SAPO-34 composite molecular sieve that makes, the content of SAPO-34 molecular sieve is 20 mass %, the content of Zn-Ce-IM-5 molecular sieve is 80% by mass. Get this composite molecular sieve and make catalyst G by (3) step method.

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Abstract

The invention relates to a catalyst for methanol aromatization. The catalyst is prepared from the components in percentage by mass: 55-80% of a modified IM-5 / SAPO-34 composite molecular sieve and 20-45% of silicon dioxide, modified metal in the modified IM-5 / SAPO-34 composite molecular sieve is M and RE, wherein M is selected from Zn, Ga, Cu or Ag, RE is Ce or La, in the modified IM-5 / SAPO-34 composite molecular sieve, the content of a modified IM-5 molecular sieve is 10-95 m%, the content of an SAPO-34 composite molecular sieve is 5-90 m%, the content of M in the modified IM-5 molecular sieveas oxide is 1.0-8.0 m%, and the content of RE as the oxide is 2.0-10.0 m%. The catalyst can directly convert methanol into aromatic products, and has high C8 aromatic yield and p-xylene selectivity.

Description

technical field [0001] The invention relates to an aromatization catalyst, a preparation method and application thereof, in particular to a methanol aromatization catalyst, a preparation method and application thereof. Background technique [0002] Light aromatic hydrocarbons benzene, toluene and xylene (BTX for short) are basic organic raw materials, mainly used in the production of chemical products and fine chemicals such as chemical fibers, plastics and rubber, especially p-xylene, which is the basic raw material for the synthesis of polyester PET. 83% of BTX aromatics come from catalytic reforming to produce oil and pyrolysis gasoline, which has a strong dependence on petroleum resources. The increase in the consumption of aromatics downstream products has contributed to the continuous increase in the demand for aromatics. Data show that from 2005 to 2010, the apparent consumption of p-xylene in China increased by nearly 168%. Therefore, for China, which is relatively ...

Claims

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Application Information

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IPC IPC(8): B01J29/85C07C1/20C07C15/02C07C15/04C07C15/06C07C15/08
CPCC07C1/20B01J29/005C07C2529/85B01J29/7049B01J29/85B01J29/74B01J29/76B01J2229/18C07C15/02C07C15/04C07C15/06C07C15/08Y02P20/52
Inventor 刘欢邹琥杜鹏
Owner CHINA PETROLEUM & CHEM CORP
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