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Low-carbon hydrocarbon aromatization method

A low-carbon hydrocarbon and aromatization technology, applied in chemical instruments and methods, organic chemistry, molecular sieve catalysts, etc., can solve problems such as poor reaction stability, and achieve good technical effects by alleviating frequent reactor switching and catalyst regeneration , Improve the effect of effective active ingredients

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of poor reaction stability of aromatization catalysts in the prior art, and a new low-carbon hydrocarbon aromatization method is provided

Method used

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  • Low-carbon hydrocarbon aromatization method

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Experimental program
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Effect test

Embodiment 1

[0030] The binder-free NaZSM-5 molecular sieve (silicon-alumina ratio of 120) was calcined at 550° C. for 4 hours to remove the template. Afterwards, 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. Ni and P species (sourced from ammonium phosphate) were loaded onto ammonia-type molecular sieves by equal-volume impregnation method, and the loading amounts were 3% and 1% of the weight of the precursor, respectively, dried and calcined.

[0031]

Embodiment 2

[0042] Binder-free NaZSM-5 molecular sieve (silicon-alumina ratio: 70) was calcined at 550°C for 4 hours to remove the template. Afterwards, 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. Zn, P and F species (sourced from ammonium phosphate and ammonium fluoride, respectively) were loaded onto ammonia-type molecular sieves by equal volume impregnation method, and the loading amounts were 5%, 1% and 1% of the weight of the precursor, respectively, dried and calcined.

[0043]

Embodiment 3

[0054] Binder-free NaZSM-5 molecular sieves (silicon-aluminum ratio of 20) were calcined at 550°C for 4 hours to remove the template. Afterwards, 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, Ga, P, and F species (sourced from ammonium phosphate and ammonium fluoride, respectively) were loaded onto ammonia-type molecular sieves by equal volume impregnation method, and the loading amount was 1% of the weight of the precursor, dried and calcined.

[0055]

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Abstract

The invention relates to a low-carbon hydrocarbon aromatization method, is mainly used for solving the problem of poor stability of a low-carbon hydrocarbon aromatization catalyst in the prior art. The problem is well solved by adopting the technical scheme that the method comprises the step that a low-carbon hydrocarbon material contacts a catalyst and reacts to generate an aromatic product containing benzene, methylbenzene and xylene under the conditions that the reaction temperature is 400-700 DEG C, the reaction pressure is 0-2.0MPa and the airspeed is 0.1-10 h<-1>, wherein the used catalyst comprises the following components in parts by weight: a) 0.1-10 parts of oxides of one or more elements selected from VIII, IIB or IIIA group, b) 0.1-10 parts of at least one assistant selected from phosphoric acid, ammonium phosphate, ammonium hydrogen phosphate, hydrogen fluoride or ammonium fluoride, and c) 80-99.8 parts of ZSM-5 molecular sieve free of a binder; the mechanical strength of the catalyst is not smaller than 3N / mm. The low-carbon hydrocarbon aromatization method can be applied to industrial production of aromatic hydrocarbon preparation employing low-carbon hydrocarbon 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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IPC IPC(8): C07C15/02C07C2/76B01J29/46B01J29/40
CPCY02P20/52
Inventor 李玉宁李亚男金照生黄祖娟
Owner CHINA PETROLEUM & CHEM CORP
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