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Methanol-to-Aromatics fluidized-bed catalyst and preparation method thereof

A fluidized bed catalyst, methanol technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of easy loss of Zn components, etc., achieve reduced emissions, strong wear resistance, and improved stability sexual effect

Active Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] One of the technical problems to be solved by the present invention is the technical problem that the Zn component in the fluidized bed catalyst for methanol to aromatics is easy to lose during the catalyst roasting and hydrothermal treatment process, and a kind of methanol to aromatics fluidized bed catalyst containing Zn is provided , the catalyst has the advantage that Zn is not easy to lose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 1500g of ZSM-5 molecular sieve with a Si / Al ratio of 30 and mix it with 6000g of 5% ammonium nitrate aqueous solution. Heat and stir at 90°C for 2h, filter and wash with water. After repeating the above process twice, the filter cake was dried in an oven at 120°C for 12 hours, and then calcined at 550°C for 4 hours to obtain an H-type ZSM-5 molecular sieve.

[0031] Take 800g of HZSM-5 molecular sieve prepared by the above method, mix it with 1200g of zinc nitrate (ZnO mass concentration is 3.3%) aqueous solution, mix thoroughly, dry, and roast at 550°C for 4h to prepare Zn-containing HZSM-5 molecular sieve.

[0032] Take 100g of Guangzhou silica sol (SiO2 mass concentration 40%, ammonium stabilized), add 11g of sulfuric acid with a concentration of 5%, and adjust the pH value to 2.0. Add 500g of water and 100g of kaolin into the slurry, and use a colloid mill to mix vigorously for 20 minutes. Then add 100 g of the Zn-containing HZSM-5 molecular sieve prepared a...

Embodiment 2

[0034] Take 10.0g of concentrated nitric acid, add 40g of water to dilute and mix it with 200g of water glass (SiO2 concentration 20%) to obtain a mixed solution with a pH value of 2.2. Mix 100g of diatomite with 200g of water, add it into water glass, and mix vigorously with a colloid mill for 15 minutes. Take 100 g of the Zn-containing HZSM-5 molecular sieve prepared in Example 1, add it into the mixed slurry, and continue rubber milling for 30 minutes. The mixed slurry was prepared into a microspherical catalyst by spray drying method, dried at 120°C for 12h, and calcined at 580°C for 6h. The catalyst is washed with water to remove Na ions and dried to obtain the methanol-to-aromatics fluidized bed catalyst B.

Embodiment 3

[0036] Take 80g of Guangzhou silica sol (SiO2 mass concentration 40%, ammonium stabilized), add 320g of water to dilute, then add 15g of concentrated phosphoric acid dropwise. Then weigh 100g of bentonite and add it to the silica sol, mix vigorously with a colloid mill for 30min, then add 90g of the Zn-containing HZSM-5 molecular sieve prepared in Example 1, add it to the mixed slurry, and continue colloid milling for 30min. The mixed slurry was prepared into a microspherical catalyst by spray drying, dried at 110°C for 18 hours, and calcined at 620°C for 4 hours to obtain methanol-to-aromatics fluidized-bed catalyst C.

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Abstract

The invention relates to a Zn-containing methanol-to-aromatics fluidized-bed catalyst and a preparation method thereof, which mainly solves the technical problem of Zn element loss during roasting and hydrothermal treatment of the existing Zn-containing methanol-to-aromatics catalyst. The present invention comprises the following components by weight percentage: 1) 10.0-40.0% binder; 2) 20.0-55.0% aluminosilicate matrix; 3) 20.0-70.0% HZSM‑5 molecular sieve; 4 ) 0.1~10% ZnO, wherein the binder is selected from the technical solution of silicon-containing species, which better solves this problem and can be used in the industrial production of methanol to aromatics.

Description

technical field [0001] The invention relates to a Zn-containing methanol-to-aromatics fluidized bed catalyst and a preparation method thereof. Background technique [0002] As basic organic chemical raw materials, more than 85% of aromatics in my country are produced through petroleum routes. On the one hand, my country's oil and natural gas resources are in short supply, leading to rising production costs of aromatics; on the other hand, my country's coal resources are relatively abundant, and a large amount of coal-based methanol production capacity is looking for a way out. Therefore, methanol to aromatics is a very promising technical route. [0003] Methanol to aromatics is a typical acid-catalyzed reaction, and the catalysts used are usually made of metals with aromatization activity (Ag, Ga, Zn, etc.) supported on acidic molecular sieves. Due to the strong acidity, excellent hydrothermal stability and the most important pore shape selectivity of ZSM-5 molecular siev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40C07C1/20C07C15/02C07C15/04C07C15/06C07C15/08
CPCY02P20/52
Inventor 陈希强汪哲明张铁柱
Owner CHINA PETROLEUM & CHEM CORP
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