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Method and system for reducing content of heavy hydrocarbon in hydrocarbons prepared from methanol

A technology for producing hydrocarbons and heavy hydrocarbons from methanol, which is applied in the direction of producing hydrocarbons from oxygen-containing organic compounds, etc., can solve the problems of reducing the economy of methanol-to-hydrocarbon units, low utilization value of heavy hydrocarbon resources, etc., and achieve high economic value and social benefits, The effect of reducing heavy hydrocarbon content and increasing production

Inactive Publication Date: 2018-04-27
深圳市新路田科技有限公司
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Problems solved by technology

[0002] At present, with the development of my country's atmospheric control and national economy, the demand for light hydrocarbons and aromatics is increasing. The construction of a large number of methanol-to-hydrocarbon units will produce a large amount of heavy hydrocarbons. The utilization value of heavy hydrocarbon resources is low, reducing the methanol production. Economics of Hydrocarbon Plants

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  • Method and system for reducing content of heavy hydrocarbon in hydrocarbons prepared from methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] according to figure 1 According to the requirements of the process flow shown, the methanol flow rate is controlled at 100 kg / h, the methanol composition: 99.9%, the circulating gas flow rate is 500 kg / h, and the circulating gas composition: H 2 10%CH 4 60%C 2 h 4 10%C 2 h 6 20%; the above-mentioned methanol and cycle gas are pressurized to 2.0MPa.

[0038] The first stage of catalytic reactor 5 is at a mass space velocity of 20 h -1 , the temperature is 410℃, the pressure is 2.2 MPa; the second stage is at a mass space velocity of 1.5 h -1 , temperature 390 ℃, pressure 2.1 MPa process conditions;

[0039] The reaction result is as follows: the product light hydrocarbons are separated by the stabilizing tower 8, and the content of heavy hydrocarbons (durene) in the light hydrocarbon products is 1.8% after analysis.

Embodiment 2

[0041] according to figure 1 According to the requirements of the process flow shown, the methanol flow rate is controlled at 200 kg / h, the methanol composition: 95.0%, the circulating gas flow rate is 900 kg / h, and the circulating gas composition: H 2 10%CH 4 60%C 2 h 4 10%C 2 h 6 20%; the above-mentioned methanol and cycle gas are pressurized to 2.1MPa.

[0042] The first section of catalytic reactor 5 is at a mass space velocity of 25 h -1 , the temperature is 400℃, the pressure is 2.0 MPa; the second stage is at a mass space velocity of 1.0 h -1 , temperature 380 ℃, pressure 2.5 MPa process conditions;

[0043] The light hydrocarbons are separated by the stabilizing tower (10). After analysis, the content of heavy hydrocarbons (durene) in the light hydrocarbon products is 1.75%.

Embodiment 3

[0045] according to figure 1 According to the requirements of the process flow shown, the methanol flow rate is controlled at 200 kg / h, the methanol composition: 90.0%, the circulating gas flow rate is 900 kg / h, and the circulating gas composition: H 2 10%CH 4 60%C 2 h 4 10%C 2 h 6 20%; the above-mentioned methanol and cycle gas are pressurized to 2.5MPa.

[0046] The first stage of catalytic reactor 5 is at a mass space velocity of 50 h -1 , the temperature is 420℃, the pressure is 2.5 MPa; the second stage is at a mass space velocity of 1.2 h -1 , the process conditions of temperature 410 ℃ and pressure 1.9 MPa;

[0047] The light hydrocarbons are separated by the stabilizing tower (10). After analysis, the content of heavy hydrocarbons (durene) in the light hydrocarbon products is 1.93%.

[0048] The content of heavy hydrocarbons (durene) in the light hydrocarbon products produced in the above examples is far lower than the 8-10% level of heavy hydrocarbons (dur...

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Abstract

The invention provides a method and a system for reducing the content of heavy hydrocarbon (durene) in hydrocarbons prepared from methanol. The method is characterized in that methanol which is used as a raw material is boosted, preheated, vaporized, overheated, catalyzed, cooled and separated. The method and the system realize the great reduction of the content of the heavy hydrocarbon (durene) in the methanol-to-hydrocarbon process, reduce the content of the heavy hydrocarbon in the technology to 2% or less from original about 8-10%, and eliminate a heavy hydrocarbon processing unit in the original technology, so the investment and the running cost of a methanol-to-hydrocarbon device are reduced, the recovery rate of light hydrocarbons is increased by 6-8%, and the economical property ofthe methanol-to-hydrocarbon technology is improved. A byproduct circulating gas generated in the production process is recycled, and a heat exchange loop is designed in the system, so the material and energy utilization rate of the system is improved.

Description

technical field [0001] The present invention relates to a method and system for producing methanol from methanol, in particular to a method and system for reducing the content of heavy hydrocarbons under the action of methanol and a circulating gas catalyst. Hydrocarbon content (drene), improve the selectivity of methanol to hydrocarbons (aromatics). Background technique [0002] At present, with the development of my country's atmospheric control and national economy, the demand for light hydrocarbons and aromatics is increasing. The construction of a large number of methanol-to-hydrocarbon units will produce a large amount of heavy hydrocarbons. The utilization value of heavy hydrocarbon resources is low, reducing the methanol production. Economics of Hydrocarbon Plants. [0003] In order to improve the economical efficiency of a methanol-to-hydrocarbon plant, the invention provides a method for reducing the content of heavy hydrocarbons (durene) under the action of a cata...

Claims

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Application Information

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IPC IPC(8): C07C1/20
CPCC07C1/20
Inventor 肖水龙李天真邹卫国
Owner 深圳市新路田科技有限公司
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