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Process of methanol conversion for preparing arene and catalyst and catalyst preparation method

A methanol conversion and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of low selectivity of target products and complicated processes, and achieve high aromatics selectivity and total selectivity Improve the effect of high flexibility in process operation

Inactive Publication Date: 2006-12-20
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process route is relatively complicated, and the selectivity of the target product is not high.
At present, there is no technology for the direct production of aromatics from methanol conversion

Method used

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  • Process of methanol conversion for preparing arene and catalyst and catalyst preparation method
  • Process of methanol conversion for preparing arene and catalyst and catalyst preparation method
  • Process of methanol conversion for preparing arene and catalyst and catalyst preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Preparation and characterization of the first-stage catalyst

[0054] (1) Take nSiO 2 / nAl 2 o 3 Ratio of 30.28, 30 grams of small-grain ZSM-5 molecular sieves with an average particle size of 0.1 μm was roasted at 520° C. for 5 hours to remove physically adsorbed impurities. For the specific preparation method of the above-mentioned molecular sieve, see Chinese patent 00109593.5;

[0055] (2) Perform ion exchange with 0.5mol / L ammonium nitrate solution in a boiling state for 2 hours, filter, wash 3 times with deionized water, dry in an oven at 120°C, and then place it in a roasting furnace at 540°C keep for 5 hours;

[0056] (3) Get 20 grams of molecular sieves obtained in step (2), 7 grams of γ-Al 2 o 3 , mixed in a mortar, and ground evenly;

[0057] (4) Add 3% nitric acid solution dropwise to the ground material, knead properly, extrude it into a columnar shape of Ф2 with a screw extruder, put it in an oven and dry it at 120°C;

[0058] (5) Crush strip-sh...

Embodiment 2

[0075] 1. Preparation of one-stage reforming catalyst

[0076] (1) Take nSiO 2 / nAl 2 o 3 Ratio is 30 grams of small-grain ZSM-5 molecular sieves of 40.12 and roasted at 540° C. for 4 hours to remove its physically adsorbed impurities;

[0077] (2) Perform ion exchange with 0.5mol / L ammonium nitrate solution in a boiling state for 2 hours, filter, wash 5 times with deionized water, dry in an oven at 120°C, and then place it in a roasting furnace at 520°C Keep it for 5 hours to get small grain HZSM-5 molecular sieve;

[0078] (3) Combine 14 grams of molecular sieve with 6 grams of γ-Al 2 o 3 At the same time, put it into the mortar and mix it, and grind it evenly;

[0079] (4) Add 3% nitric acid solution dropwise to the ground material and knead properly, extrude it into a columnar shape of Ф2 with a screw extruder, put it in an oven and dry it at 110°C;

[0080] (5) Crush strip molecular sieves to 10-40 mesh and put them in a muffle furnace to heat up to 510°C and roast...

Embodiment 3

[0093] 1. Preparation of one-stage conversion catalyst

[0094] (1) Add nSiO 2 / nAl 2 o 3Ratio is 30 grams of small-grain ZSM-5 molecular sieves of 54.36 and roasted at 540° C. for 5 hours to remove its physically adsorbed impurities;

[0095] (2) Perform ion exchange with 0.5mol / L ammonium sulfate solution in a boiling state for 2 hours, filter, wash 4 times with deionized water, dry in an oven at 120°C, and then place it in a roasting furnace at 530°C Keep it for 5 hours to get small grain HZSM-5 molecular sieve;

[0096] (3) 14.4 grams of molecular sieves are mixed with 5.6 grams of pseudo-thin water alumina in a mortar and mixed evenly;

[0097] (4) Add 3% nitric acid solution dropwise to the ground material and knead properly, extrude it into a columnar shape of Ф2 with a screw extruder, put it in an oven and dry it at 115°C;

[0098] (5) Crush strip molecular sieves to 10-40 meshes, put them in a muffle furnace and heat up to 520 ° C for 3 hours to remove nitric aci...

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Abstract

This invention relates to a process for transforming methanol to aromatic hydrocarbons, comprising: use methanol as raw material, with modified ZSM-5 molecular sieve as catalyst, under conditions of operation pressure 0.1-5.0Mpa, operation temperature 300-460Deg C, raw material liquid air speed 0.1-6.0h-1, transformed to products with aromatic hydrocarbons as main components; separate the gas-phase products lower carbon hydrocarbons from the liquid-phase C5+ hydrocarbons by cooling separation; the liquid-phase C5+ hydrocarbons then can be separated to be aromatic hydrocarbons and non-aromatic hydrocarbons by extracting separation. This invention is characterized of high total selectivity of aromatic hydrocarbons and flexible process operation.

Description

technical field [0001] The invention belongs to a process for preparing aromatic hydrocarbons by using methanol as a raw material, a catalyst used therein and a preparation method of the catalyst. technical background [0002] Methanol is a rich source of industrial raw materials, is C 1 The cornerstone of chemistry and chemical engineering, the synthesis and transformation of methanol has always been a very active subject. In recent years, in order to improve the competitiveness, my country's methanol production is also developing towards large-scale and energy-saving, and the output continues to increase. At present, due to the promising prospect of using methanol as a motor fuel, new methanol plants are still under construction. Under the circumstance that the prospect of methanol as a motor fuel is uncertain, it is of great significance to actively develop methanol downstream products for the development of the methanol industry (Shen Peizhi, Progress in Chemical Indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/207C07C15/00C07C13/00B01J29/40
CPCY02P20/52
Inventor 李文怀张庆庚胡津仙时建敏张建利陆宏伟钟炳杨挺
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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