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Method for aromatizing low carbon hydrocarbon

A low-carbon hydrocarbon and aromatization technology, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve problems such as poor stability, achieve optimal reaction stability, ease reactor switching and catalysts The effect of frequent regeneration and good technical effects

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that there is a problem of poor stability in the aromatization catalyst reaction in the prior art, and a new low-carbon hydrocarbon aromatization method is provided

Method used

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  • Method for aromatizing low carbon hydrocarbon

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Experimental program
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Effect test

Embodiment 1

[0022] The binder-free NaZSM-5 molecular sieve was calcined at 550°C for 4h to remove the template agent. After that, the obtained material was exchanged three times with 0.8 mol / L ammonium nitrate solution at 80°C, washed twice with water, and dried at 120°C for 10 hours to obtain ammonia-type molecular sieves. The ammonia-type molecular sieve was loaded with Zn metal species by the equal volume impregnation method, the loading amount was 2wt%, and then stood for 4 hours, dried at 120°C for 10 hours, and calcined at 550°C for 4 hours to obtain a catalyst, which was designated as catalyst D.

Embodiment 2

[0030] The binder-free NaZSM-5 molecular sieve (silicon-alumina ratio of 100) was calcined at 550°C for 4h to remove the template agent. After that, the obtained material was exchanged three times with 0.8 mol / L ammonium nitrate solution at 80°C, washed twice with water, and dried at 120°C for 10 hours to obtain ammonia-type molecular sieves. Ga and Ni metal species were loaded onto ammonia-type molecular sieves by equal-volume impregnation method, the loading amounts were 2wt% and 0.5wt%, respectively, and then stood for 4h, dried at 120°C for 10h, and calcined at 550°C for 4h to prepare the catalyst, which was designated as Catalyst H .

Embodiment 3

[0038] NaZSM-5 molecular sieve raw powder (silicon to aluminum ratio 400) was calcined at 550°C for 4h to remove the template. After that, the obtained material was exchanged three times with 0.8 mol / L ammonium nitrate solution at 80°C, washed twice with water, and dried at 120°C for 10 hours to obtain ammonia-type molecular sieves. Fe and Ni metal species were loaded onto ammonia-type molecular sieves by equal-volume impregnation method, with loading amounts of 1 wt% and 1 wt%, respectively, and then stood for 4 h, dried at 120 °C for 10 h, and calcined at 550 °C for 4 h to obtain a catalyst, which was designated as catalyst L.

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Abstract

The invention relates to a method for aromatizing low carbon hydrocarbon. The problem that the stability of a low carbon hydrocarbon aromatizing catalyst is low in the prior art is solved. The method comprises the following steps of: under the condition that the reaction temperature is 400 to 600 DEG C, the reaction pressure is 0 to 1.0MPa and the space velocity is 0.01 to 10h-1, contacting a low carbon hydrocarbon raw material with the aromatizing catalyst to react to generate an aromatic hydrocarbon product containing benzene, methylbenzene and dimethylbenzene, wherein the catalyst comprises the following components in part by weight: a) 0.1 to 10 parts of oxides of one or more element selected from VIIIA, IIB and IIIB; and b) 90 to 99.9 parts of ZSM-5 molecular sieve shaped without a binding agent. The mechanical strength of the catalyst is not lower than 3N / mm. The problem is better solved through the technical scheme and the method can be applied to the industrial production of the aromatic hydrocarbon produced through low carbon olefin aromatization.

Description

technical field [0001] The invention relates to a low-carbon hydrocarbon aromatization method. Background technique [0002] Aromatics are widely used in synthetic fibers, synthetic resins, synthetic rubbers and various fine chemicals, and are indispensable basic organic chemical raw materials. In addition, non-benzene aromatics are also important blending components for the production of high-octane gasoline. In recent years, the downstream products of aromatics have developed rapidly, leading to a continuous increase in the demand for aromatics in domestic and foreign markets. Among them, the annual growth rate of China's demand for aromatics is over 10%. [0003] C4-C6 low-carbon hydrocarbons and mixed hydrocarbons containing C4-C6 low-carbon hydrocarbons are secondary liquids in the petrochemical and oil refining industries, produced in ethylene projects, oil refineries and natural gas purification processes. Among the many low-carbon hydrocarbons, except for a few comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/00C07C5/00C07C15/04C07C15/06C07C15/08B01J29/40B01J29/46
CPCY02P20/52
Inventor 李玉宁任丽萍李亚男金照生滕加伟
Owner CHINA PETROLEUM & CHEM CORP
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