Nano-scale low carbon alkane aromatization catalyst

A low-carbon alkane, aromatization technology, applied in physical/chemical process catalysts, molecular sieve catalysts, hydrocarbons, etc., can solve the problems of loss of catalyst active components, poor conversion and selectivity, and short single-pass reaction cycle, etc. Achieve the effect of high selectivity, high conversion rate and simple preparation method

Inactive Publication Date: 2008-01-23
DAQING PETROLEUM ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the aromatization reaction of the catalyst under high temperature conditions, there are still problems such as poor conversion rate and selectivity, loss of catalyst active components, fast carbon deposition rate, and short one-way reaction cycle.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1), preparation of catalyst:

[0016] (a) Weigh Zn(NO 3 ) 2 ·6H 2 O 4.6 grams, add 20ml deionized water, be made into aqueous solution, stir 1 hour;

[0017] (b) take by weighing the nanometer HZSM-5 molecular sieve 10g that particle diameter is 10-100nm, add the solution described in (a);

[0018] (c) Stir for 1 hour, disperse by ultrasonic vibration for 30 minutes; impregnate for 10 hours;

[0019] (d) Weigh 0.03 g of erbium nitrate and add the solution described in (c). Thoroughly stir for 2 hours, disperse with ultrasonic vibration for 30 minutes, and soak for 24 hours.

[0020] (e) drying the solution described in (d) at 100° C. for 8 hours, and then calcining at 500° C. in air for 7 hours to obtain an aromatization catalyst loaded with 10% zinc and 0.1% erbium.

[0021] (2), detection of catalyst:

[0022] The feedstock oil is n-hexane, the catalyst is 2 g, the reaction pressure is normal pressure, the reaction temperature is 400-540°C, and the space veloc...

Embodiment 2

[0027] (1), preparation of catalyst:

[0028] (a) Weigh an appropriate amount of Zn(NO 3 ) 2 ·6H 2 O2.3 grams, add 20ml deionized water, be made into aqueous solution, stir for 1 hour;

[0029] (b) take by weighing the nanometer HZSM-5 molecular sieve 10g that particle diameter is 10-100nm, add the solution described in (a);

[0030] (c) Stir for 1 hour, disperse by ultrasonic vibration for 30 minutes; impregnate for 10 hours;

[0031] (d) Weigh an appropriate amount of 1.5 grams of thulium nitrate, and add the solution described in (c). Thoroughly stir for 2 hours, disperse with ultrasonic vibration for 30 minutes, and soak for 24 hours.

[0032] (e) The solution described in (d) was dried at 110° C. for 8 hours, and then calcined at 400° C. in air for 7 hours to prepare an aromatization catalyst loaded with 5% zinc and 5% thulium.

[0033] (2), detection of catalyst:

[0034] The raw material oil is n-hexane, the catalyst is 2g, the reaction pressure is normal pressur...

Embodiment 3

[0039] (1), preparation of catalyst:

[0040] (a) Weigh an appropriate amount of Zn(NO 3 ) 2 ·6H 2O 0.14 gram, add 20ml deionized water, be made into aqueous solution, stir 1 hour;

[0041] (b) take by weighing the nanometer HZSM-5 molecular sieve 10g that particle diameter is 10-100nm, add the solution described in (a);

[0042] (c) Stir for 1 hour, disperse by ultrasonic vibration for 30 minutes; impregnate for 15 hours;

[0043] (d) Weigh an appropriate amount of 0.54 g of ytterbium nitrate, and add the solution described in (c). Fully stir for 2 hours, disperse with ultrasonic vibration for 30 minutes, and soak for 20 hours.

[0044] (e) The solution described in (d) was dried at 120° C. for 8 hours, and then calcined at 600° C. in air for 7 hours to prepare an aromatization catalyst loaded with 0.3% zinc and 2% ytterbium.

[0045] (2), detection of catalyst:

[0046] The raw material oil is n-hexane, the catalyst is 2g, the reaction pressure is normal pressure, the...

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Abstract

The invention relates to a Nami grade low carbon alkane aromatization catalyst, each component is counted by the occupying weight per centage in molecular sieve, make Nami HZSM-5 molecular sieve as carrier, the load occupies 0.3 to 10 per cent of Zn in Nami HZSM-5 molecular sieve, and one or tow of Te, Tm, Eu, Er which occupies 0.1 to 5 per cent of Nami HZSM-5 molecular sieve. The catalyst has the advantages of high catalyzing activity and selectivity and long service life.

Description

Technical field: [0001] The invention relates to an aromatization catalyst, which belongs to a nano-scale low-carbon alkane aromatization catalyst. Background technique: [0002] The development of aromatization catalysts is progressing rapidly. Low-carbon alkane aromatization technology can increase the value of alkanes. The light aromatics benzene, toluene, xylene, etc. in the products are important raw materials for organic chemical production, as well as high-octane gasoline. Important blending component. The most researched on aromatization is the high-performance catalyst obtained by micron HZSM-5 molecular sieve loaded with transition metals or noble metals as active components. [0003] Abroad began aromatization research in the 20th century. U.S. Patent No. 4,175,057 and others used ZSM-5 molecular sieves loaded with Zn, Ga or Zn-Ga or Zn, Ga with copper to catalyze the aromatization of propane and butane. But aromatics selectivity is only 30-40%. [0004] The Ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40C07C5/41
Inventor 于振兴付红英张晓丽孙启权张平
Owner DAQING PETROLEUM ADMINISTRATION
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