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Fluidized bed catalyst for preparing aromatic hydrocarbons from methanol

A technology for fluidized bed catalysts and aromatics, applied in physical/chemical process catalysts, molecular sieve catalysts, catalyst activation/preparation, etc., can solve the problems of low chlorine content in catalysts, high residual chlorine content in catalysts, and large equipment corrosion risks, etc. problem, achieve the effect of reducing the risk of corrosion and good wear resistance

Active Publication Date: 2019-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the technical problems to be solved by the present invention is that in the prior art, when non-aluminum sol is used as a binder to form a fluidized bed catalyst, the wear resistance of the catalyst is not good, and the residual chlorine content in the catalyst after forming with aluminum sol is relatively high, which is harmful to the catalyst. For the technical problem that the equipment has a large corrosion risk, provide a methanol-to-aromatics fluidized bed catalyst with good wear resistance, low chlorine content in the catalyst, and low corrosion risk to the reaction equipment

Method used

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  • Fluidized bed catalyst for preparing aromatic hydrocarbons from methanol
  • Fluidized bed catalyst for preparing aromatic hydrocarbons from methanol
  • Fluidized bed catalyst for preparing aromatic hydrocarbons from methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 100g of ZSM-5 and 80g of β molecular sieve, add it to 300g of phosphoric acid aqueous solution with a mass concentration of 5%, stir and mix for 30 minutes, then heat and evaporate the water to dryness, then roast it at 500°C for 3 hours to obtain a phosphorus-modified molecular sieve ;

[0032] (2) Weighing 300g of aluminum sol and mixing it with 100g of phosphoric acid aqueous solution with a mass concentration of 5%, and mixing at 60°C for 30 minutes to obtain a phosphorus-modified binder;

[0033] (3) uniformly mix the above-mentioned phosphorus-modified molecular sieve with phosphorus-modified binder, kaolin, and water in proportion, then adopt spray drying to form, and obtain a catalyst precursor through roasting at 500° C. for 4 hours;

[0034] (4) The catalyst precursor obtained above was contacted with 100% steam for 1 hour at 300°C, and the space velocity of the steam was 1h -1 , and then the temperature was lowered, and the catalyst precursor was l...

Embodiment 2

[0037] (1) Weigh 100g of ZSM-5 and 80g of beta molecular sieve, add it to 300g of phosphoric acid aqueous solution with a mass concentration of 5%, stir and mix for 30 minutes, then heat and evaporate the water to dryness, then roast it at 500°C for 3 hours to obtain phosphorus-modified molecular sieve ;

[0038] (2) Weighing 300g of aluminum sol and mixing it with 100g of phosphoric acid aqueous solution with a mass concentration of 5%, and mixing at 60°C for 30 minutes to obtain a phosphorus-modified binder;

[0039] (3) uniformly mix the above-mentioned phosphorus-modified molecular sieve with phosphorus-modified binder, kaolin, and water in proportion, then adopt spray drying to form, and obtain a catalyst precursor through roasting at 500° C. for 4 hours;

[0040] (4) The catalyst precursor obtained above was contacted with 100% steam for 2 hours at 400°C, and the space velocity of the steam was 1h -1 , and then the temperature was lowered, and the catalyst precursor was...

Embodiment 3

[0043] (1) Weigh 100g of ZSM-5 and 80g of beta molecular sieve, add it to 300g of phosphoric acid aqueous solution with a mass concentration of 5%, stir and mix for 30 minutes, then heat and evaporate the water to dryness, then roast it at 500°C for 3 hours to obtain phosphorus-modified molecular sieve ;

[0044] (2) Weighing 300g of aluminum sol and mixing it with 100g of phosphoric acid aqueous solution with a mass concentration of 5%, and mixing at 60°C for 30 minutes to obtain a phosphorus-modified binder;

[0045] (3) uniformly mix the above-mentioned phosphorus-modified molecular sieve with phosphorus-modified binder, kaolin, and water in proportion, then adopt spray drying to form, and obtain a catalyst precursor through roasting at 500° C. for 4 hours;

[0046] (4) The catalyst precursor obtained above was contacted with 100% steam for 4 hours at 500°C, and the space velocity of the steam was 1h -1 , and then the temperature was lowered, and the catalyst precursor was...

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Abstract

The invention provides a fluidized bed catalyst for preparing aromatic hydrocarbons from methanol. The catalyst provided by the invention is good in wear resistance, low in chlorine content and low inequipment corrosion. The catalyst provided by the invention adopts hydroxyl aluminium chloride with a good binding property or a mixture of the hydroxyl aluminium chloride and an acidic silica sol asa forming binder, a molecular sieve, the binder and a structure enhancer are mixed and subjected to spraying molding and then impregnation with an active metal to obtain the fluidized bed catalyst for preparing the aromatic hydrocarbons from the methanol. Before the catalyst is used, the catalyst and 300-680 DEG c high-temperature water vapor are subjected to contact treatment for a certain timefor washing off of a large amount of chlorine elements residual in the catalyst, the corrosion risk of the catalyst to reaction equipment is reduced, and the good technical effect is achieved.

Description

technical field [0001] The invention relates to a fluidized-bed catalyst for methanol-to-aromatics, in particular to a fluidized-bed catalyst for methanol-to-aromatics with high wear resistance and no corrosion to reactors. Background technique [0002] Light aromatics (in which benzene, toluene and xylene are respectively referred to as B, T and X, and the three are collectively referred to as BTX) are important basic organic chemical raw materials, and their main sources are catalytic reforming and steam cracking by-product pyrolysis gasoline (nearly 90 %) - oil route, only about 10% from coal route. However, my country is rich in coal and has little oil. Therefore, it is an important chemical technology route to prepare methanol from coal, and then to prepare olefins, aromatics or various chemicals from methanol. For the reaction of methanol to aromatics, the reaction is exothermic and prone to carbon deposition. Therefore, fluidized bed operation is a more suitable proc...

Claims

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Application Information

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IPC IPC(8): B01J29/80B01J37/08B01J37/10B01J37/02C10G3/00
CPCY02P30/20
Inventor 陈希强李继文
Owner CHINA PETROLEUM & CHEM CORP
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