Catalyst for straight-run naphtha aromatization and preparation method thereof

A catalyst and an aromatization technology are applied in the field of a catalyst for the aromatization of straight-run naphtha and the field of preparation thereof, which can solve the problems of poor stability of the aromatization catalyst, and achieve the advantages of being beneficial to diffusion and catalysis, uniform distribution, The effect of improving utilization

Inactive Publication Date: 2017-04-05
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] CN201210324511.X provides a low-carbon hydrocarbon aromatization catalyst, w

Method used

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  • Catalyst for straight-run naphtha aromatization and preparation method thereof
  • Catalyst for straight-run naphtha aromatization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] The preparation process of the catalyst for aromatization of straight-run naphtha is:

[0028] (1) Knead the original ZSM-5 molecular sieve powder and silica gel powder in a mass ratio of 9:1, and sesame powder is 1% of the mass of the molecular sieve and silica gel powder, then peptize with silica sol, then extrude into a strip and dry at 120°C Carrier A was prepared by roasting at a constant temperature of 550°C for 4 hours for 2 hours.

[0029] (2) Take 30 grams of molecular sieve A into the constant temperature section of the fixed bed reactor, and heat up to 500°C at a rate of 5°C / min. After the temperature is constant, use a metering pump to pass ammonia (ammonia concentration is 0.2mol / L, 0.3ml / min) After treatment for 3 hours, the molecular sieve number after the treatment is B.

[0030] (3) Take 20 grams of molecular sieve B into a 500 ml beaker, add 200 ml of 10% sodium hydroxide aqueous solution with a mass fraction of it, and with stirring, heat...

Example Embodiment

[0033] Example 2

[0034] In step (2), the ammonia water was changed to deionized water, and the rest of the preparation process was the same as that in Example 1, to obtain aromatization catalyst b.

Example Embodiment

[0035] Example 3

[0036] In step (4), 500 ml of a mixed solution of 10% ammonium nitrate and 10% lanthanum nitrate was added, and the mixture was heated to 90°C under stirring, refluxed at constant temperature for 2 hours, filtered, washed, and dried at 120°C. 2 hours, then put it in a muffle furnace to program the temperature to 550°C, roast for 4 hours, repeat the above operation twice to obtain a molecular sieve, numbered D.

[0037] In step (5), the molecular sieve D was immersed in a zinc nitrate solution for 12 hours, dried at 120°C for 4 hours, and calcined at 550°C for 12 hours. The rest of the preparation process is the same as in Example 1, and the aromatization catalyst c is obtained.

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Abstract

The invention discloses a catalyst for straight-run naphtha aromatization and a preparation method thereof. The catalyst for straight-run naphtha aromatization is prepared by modifying a nano ZSM-5 molecular sieve, preparing a carrier and preparing the catalyst. The catalyst is suitable for treating raw materials with high alkane content. And the catalyst has high catalytic activity and high arene selectivity. So the catalyst can be applied to more mild process conditions and can be applied to production of high-octane gasoline blending components and chemical raw materials like benzene, toluene, xylene, etc.

Description

technical field [0001] The patent of the invention relates to the field of petrochemical industry, in particular to a catalyst for aromatization of straight-run naphtha and a preparation method thereof. Background technique [0002] With the decreasing of petroleum resources, the research of converting abundant straight-chain low-carbon alkanes into high value-added benzene, toluene and xylene (BTX) has attracted people's attention. BTX can be used as a blending component of high-octane gasoline, and is an important raw material in the organic chemical industry, especially p-xylene has attracted the most attention as a raw material for the production of polyester. Aromatization of light hydrocarbons is a new technology developed in recent years to use light hydrocarbons to produce aromatics or high-octane gasoline blending components. This technology has the following characteristics: the molecular sieve catalyst used has a certain resistance to sulfur and nitrogen. No pre-...

Claims

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Application Information

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IPC IPC(8): B01J29/40
Inventor 曹志涛程光剑莫娅南李学赵晶王永帮孙伟刚张英杰张黎英李振忠王俊艳石洪波
Owner PETROCHINA CO LTD
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