Composite molecular sieve catalyst for preparing aromatics by use of methanol

A composite molecular sieve and catalyst technology, which can be used in molecular sieve catalysts, physical/chemical process catalysts, hydrocarbon production from oxygen-containing organic compounds, etc., and can solve the problems of low BTX yield and low BTX selectivity.

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that when the existing catalyst is applied to the methanol aromatization process, there are problems of low BTX selectivity and low BTX yield. A new composite molecular sieve type methanol aromatization catalyst is proposed. The catalyst is used in the process of methanol to aromatics, which has the advantages of high BTX selectivity and high BTX yield

Method used

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  • Composite molecular sieve catalyst for preparing aromatics by use of methanol
  • Composite molecular sieve catalyst for preparing aromatics by use of methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 40.4g of hydrogen-form ZSM-5 and 4g of SAPO-34 molecular sieve, and 96.3g of pseudo-boehmite and 5.2g of scallop powder are wet-kneaded and molded with dilute nitric acid with a concentration of 1% by weight. The molded carrier is dried at 100-120°C for 6-24 hours, and calcined at 500-650°C for 1-12 hours. Take 40g of calcined carrier, impregnate 28.3g of aqueous solution containing 9.56g of lanthanum nitrate and 1.47g of zinc nitrate in equal volume, age at room temperature for 6~24 hours, then dry at 100~120°C for 6~24h, and then dry at 500~650°C The catalyst a was obtained by lower roasting for 1-12 hours. The composition of the catalyst is listed in Table 1.

[0019]

Embodiment 2~8

[0021] Catalysts b to k were prepared according to the method given in Example 1, and the composition of the catalysts is listed in Table 1.

[0022]

Embodiment 9~12

[0036] Embodiments 9-12 are the reaction results obtained by changing the process conditions for the use of catalyst b, and their relevant parameters are listed in Table 3.

[0037] table 3

[0038]

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Abstract

The invention relates to a composite molecular sieve catalyst for preparing aromatics by use of methanol, aiming at solving the problems that the BTX (Benzene-Toluene-Xylene) has low selectivity and the BTX has low yield when the existing catalyst is used for preparing aromatics by use of methanol. The catalyst is prepared from the following components in percentage by weight: 0.5-8% of P2O5, 0.5-15% of at least one of ZnO, Ga2O3 or MoO3, 0-6% of at least one of La2O3 or Co2O3, 30-80% of mixture of ZSM-5 molecular sieve and SAPO-34 molecular sieve, and 15-65% of at least one of aluminum oxide or silicon oxide, wherein the weight ratio of the ZSM-5 to the SAPO-34 is 10:1 to 0.5:1. The composite molecular sieve catalyst can solve the problem and can be used for industrial production for preparing aromatics by use of methanol.

Description

technical field [0001] The invention relates to a composite molecular sieve catalyst for producing aromatics from methanol. Background technique [0002] Aromatics (especially benzene, toluene and xylene, collectively referred to as BTX) are important basic organic chemical raw materials. Aromatics mainly come from catalytic reforming and steam cracking by-product pyrolysis gasoline (nearly 90%)-petroleum route, and only about 10% from coal route. From the perspective of energy distribution, my country lacks oil and gas but is rich in coal, and its dependence on foreign crude oil has exceeded 50%, which has threatened national energy security. Moreover, the depletion of petroleum resources and the long-term high volatility of petroleum prices have brought unprecedented severe challenges to energy and chemical industries based on petroleum routes. Therefore, it is imperative to develop new technologies to replace petroleum routes to produce aromatics. my country's coal meth...

Claims

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Application Information

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IPC IPC(8): B01J29/85C07C15/04C07C15/06C07C15/08C07C1/20
CPCY02P20/52
Inventor 汪哲明陈希强许烽
Owner CHINA PETROLEUM & CHEM CORP
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