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Aromatization catalyst as well as preparation method and application 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 short single-pass operation cycle, catalyst carbon deposition, frequent regeneration, etc., to achieve long single-pass cycle, reduce Lower operating cost and improved liquid collection effect

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The aforementioned naphtha-coupled methanol aromatization reactions all have problems such as serious carbon deposition on the catalyst, short single-pass operation period, and frequent regeneration, which have not yet been effectively resolved.

Method used

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  • Aromatization catalyst as well as preparation method and application thereof
  • Aromatization catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step (1): according to the liquid-solid mass ratio of 5, evenly mix H-ZSM-5 molecular sieve with the aqueous solution with the concentration of n-butylamine of 0.15mol / l. Under closed conditions, raise the temperature to 145 ℃ at the rate of 5 ℃ / min for reaction for 48h. After the reaction, centrifuge, wash the filter cake with deionized water to neutral, dry it at 120 ℃ for 12h, and bake it at 600 ℃ for 8h.

[0034] Step (2): Based on the total mass of the dry powder, weigh 50% of the material obtained in step (1), 35% pseudo boehmite, 10% kaolin, 2% Sesbania powder and 3% cellulose. After the dry powder is mixed evenly, add a nitric acid solution with a concentration of 8.5%, knead it into a plastic paste, extrude it into a cylindrical shape with a diameter of 1.5mm, dry it at 120 ℃ for 12h and bake it at 600 ℃ for 8h.

[0035] Step (3): prepare KH with concentration of 0.25mol / l 2 PO 4 The solution and the formed body obtained in step (2) were immersed in the same volu...

Embodiment 2

[0040] Step (1): according to the liquid-solid mass ratio of 5, mix 70% H-ZSM-5 and 30% h-zsm-11 molecular sieves with the aqueous solution with the concentration of n-butylamine of 0.15mol / l evenly. Under closed conditions, raise the temperature to 145 ℃ at the rate of 5 ℃ / min for reaction for 48h. After the reaction, centrifuge, wash the filter cake with deionized water to neutral, dry it at 120 ℃ for 12h, and bake it at 600 ℃ for 8h.

[0041] Step (2): Based on the total mass of dry powder, weigh 50% of the materials obtained in step (1), 35% MgO, 10% kaolin, 2% Sesbania powder and 3% cellulose, and mix the dry powder evenly; Prepare a solution containing 6% nitric acid and 1.5% sodium tetraborate, mix it with dry powder, knead it into a plastic paste, extrude it into a cylindrical shape with a diameter of 1.5mm, dry it at 120 ℃ for 12h, and bake it at 600 ℃ for 8h.

[0042] Step (3): prepare HCl solution with a concentration of 0.05mol / l, over impregnate the formed body obta...

Embodiment 3

[0046] Step (1): prepare mixed alkali liquor with n-butylamine concentration of 0.15mol / l and ammonium fluosilicate concentration of 0.05mol / l, mix 70% H-ZSM-5 and 30% h-zsm-12 molecular sieves with the alkali liquor evenly according to the liquid-solid mass ratio of 5, raise the temperature to 145 ℃ under closed conditions at the rate of 5 ℃ / min for reaction for 48h, centrifuge after the reaction, wash the filter cake with deionized water to neutral, dry it at 120 ℃ for 12h, and roast it at 600 ℃ for 8h.

[0047] Step (2): Based on the total mass of dry powder, weigh 50% of the material obtained in step (1) and 35% ZrO 2 , 10% kaolin, 2% Sesbania powder and 3% cellulose. After the dry powder is mixed evenly, add nitric acid solution with concentration of 8.0%, knead it into plastic paste, extrude it into cylindrical shape with diameter of 1.5mm, dry it at 120 ℃ for 12h and bake it at 600 ℃ for 8h.

[0048] Step (3): prepare the acetic acid solution with the concentration of 0.5...

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Abstract

The invention discloses an aromatization catalyst and a preparation method thereof. The pore volume corresponding to the pore size of 1-less than 2nm in the catalyst accounts for 5-40% of the total pore volume; the pore volume corresponding to the pore diameter of 2-less than 5nm accounts for 20-50% of the total pore volume; the pore volume corresponding to the pore diameter of 5-less than 10nm accounts for 10-40% of the total pore volume; the pore volume corresponding to the pore diameter smaller than 10 nm and smaller than 20 nm accounts for 1-30% of the total pore volume; and the pore volume corresponding to the pore diameter of 20-50nm accounts for 1-20% of the total pore volume. The preparation method of the catalyst comprises the following steps: carrying out alkali treatment on the molecular sieve, molding the molecular sieve subjected to the alkali treatment, and carrying out acid treatment and hydrothermal treatment on the molded material. The aromatization catalyst has the advantages of high reaction activity, long one-way operation period and the like.

Description

technical field [0001] The invention relates to an aromatization catalyst and a preparation method and application thereof, in particular to an aromatization catalyst with high activity and stability and a preparation method and application thereof. Background technology [0002] Clean fuel production is one of the main tasks of petrochemical enterprises. However, with the shortage of oil resources and the rising price of crude oil, how to use limited resources to produce the products needed by the market to the greatest extent is a challenge for petrochemical enterprises. The main components in the gasoline pool are catalytic cracking gasoline, catalytic reforming gasoline, alkylated gasoline and isomerized gasoline. Except that FCC gasoline is obtained from heavier raw materials, others are obtained by naphtha or light hydrocarbon conversion. However, the current problems faced by petrochemical enterprises are, on the one hand, the shortage of high-quality naphtha resources, on...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/80B01J35/10B01J37/10C10G3/00
CPCB01J29/40B01J29/80B01J37/10C10G3/49B01J2229/37B01J2229/38B01J2229/186B01J29/405B01J29/7084B01J29/65B01J2229/26C10G2400/02B01J35/695Y02P30/20
Inventor 张信伟王海洋李杰李红营郭智芳
Owner CHINA PETROLEUM & CHEM CORP