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Aromatization catalyst and preparation method thereof

A catalyst and aromatization technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of high dry gas yield and low yield of aromatics, and achieve low dry gas yield, Effect of high yield of aromatics and high yield of propylene

Active Publication Date: 2010-12-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also the problem that the dry gas yield of the catalyst using ZSM-5 as the catalytic material is high, and the aromatics yield of the catalyst using MCM-22 as the catalytic material is relatively low.

Method used

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  • Aromatization catalyst and preparation method thereof
  • Aromatization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Catalyst C of the present invention 1 The preparation method is as follows:

[0025] (1) Modification of ZSM-5 molecular sieve

[0026] Take 100 grams of SiO 2 / Al 2 o 3 HZSM-5 molecular sieve with a molecular molar ratio of 65, first impregnated with 100 ml of phosphoric acid solution with a concentration of 6.32 mg / ml for 8 hours, dried at 110°C for 4 hours, and roasted at 550°C for 4 hours, then used 100 ml of LaCl with a concentration of 3.04 mg / ml 3 .6H 2 O solution was impregnated for 8h, dried at 110°C for 4h, and calcined at 550°C for 4h to obtain P-La-ZSM-5.

[0027] (2) Modification of MCM-22 molecular sieve

[0028] Take 100 grams of SiO 2 / Al 2 o 3 Molecular molar ratio is the HMCM-22 molecular sieve of 30, is the Zn(NO of 11 mg / ml with 100 milliliter concentration 3 ).6H 2O solution was impregnated for 8h, dried at 110°C for 4h, and calcined at 550°C for 4h to obtain Zn-MCM-22.

[0029] (3) Catalyst preparation

[0030] 58.5 grams of P-La-ZSM-5...

Embodiment 2

[0032] Catalyst C of the present invention 2 The preparation method is as follows:

[0033] The preparation method of the catalyst is the same as in Example 1, except that the ratio of P-La-ZSM-5:Zn-MCM-22 in the catalyst carrier is 75:25. The composition is shown in Table 2, and the evaluation results are shown in Table 3.

Embodiment 3

[0035] Catalyst C of the present invention 3 The preparation method is as follows:

[0036] The preparation method of the catalyst is the same as in Example 1, except that the ratio of P-La-ZSM-5:Zn-MCM-22 in the catalyst carrier is 60:40. The composition is shown in Table 2, and the evaluation results are shown in Table 3.

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Abstract

The invention relates to an aromatization catalyst comprising two molecular sieves of ZSM-5 and MCM-22, wherein the molecular sieves are in a hydrogen type, the total weight percentage of the two molecular sieves is 10-90 in the catalyst, the weight rate of the molecular sieve ZSM-5 and the molecular sieve MCM-22 is 90:10-50:50, the molecular sieve ZSM-5 is modified by phosphorus and a rare-earth element, and the molecular sieve MCM-22 is modified by zinc. The preparation method of the aromatization catalyst comprises the following steps of: firstly, modifying the two molecular sieves respectively; and then preparing the catalyst. The aromatization catalyst has higher aromatic yield, lower dry-gas yield and higher acrylic yield when being used for aromatizing n-alkane, cyclane, naphtha, and the like.

Description

technical field [0001] The invention relates to an aromatization catalyst and a preparation method thereof, in particular to an aromatization catalyst for normal alkanes, naphthenes, naphtha and the like and a preparation method thereof. Background technique [0002] With the decrease of petroleum resources, the research on converting abundant and cheap light hydrocarbons into high value-added benzene, toluene and xylene (BTX) has become an important research topic and a hot issue. Aromatization of light hydrocarbons is a new process for the production of aromatics developed in recent years, which is used to produce aromatics or blending components of high-octane gasoline. Compared with catalytic reforming technology, aromatization of light hydrocarbons has the following characteristics: wide application range of raw materials; reaction can be carried out under low pressure non-hydrogen conditions. The zeolite catalyst used has a certain resistance to sulfur and nitrogen, a...

Claims

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Application Information

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IPC IPC(8): B01J29/80B01J29/40B01J29/70B01J37/04B01J37/08C07C2/76C07C15/00C10G35/06
Inventor 贾立明刘全杰徐会青王伟
Owner CHINA PETROLEUM & CHEM CORP
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