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Device and process for separation and purification of methanol synthetic oil containing high-content aromatic hydrocarbon

A technology of methanol-synthetic oil and high-aromatic hydrocarbons, applied in the field of rectification, can solve the problems of high percentage, affecting gasoline quality, and the quality of synthetic oil not meeting the national standard of motor gasoline, so as to improve the quality of oil products, improve economic benefits, Broaden the effect of developing and utilizing the market

Active Publication Date: 2010-07-07
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the particularity of lignite and the incompatibility of the existing methanol synthesis technology, the content of aromatics in the "oil" obtained by the methanol reaction is usually too high, and durene accounts for a relatively large percentage, seriously It affects the quality of gasoline, and eventually the quality of synthetic oil does not meet the national standard for motor gasoline
At present, there is no treatment process and device for methanol synthetic oil with high aromatic content

Method used

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  • Device and process for separation and purification of methanol synthetic oil containing high-content aromatic hydrocarbon
  • Device and process for separation and purification of methanol synthetic oil containing high-content aromatic hydrocarbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The light removal tower (1) pressure is controlled at 150KPa, the tower top temperature is controlled at 10.3 ℃, the number of theoretical plates is 87, and the reflux ratio is 3; 97.8 ℃, the number of theoretical plates is 92, and the reflux ratio is 12; The pressure of the toluene refining tower (4) is controlled at 30KPa, the temperature at the top of the tower is controlled at 97.63°C, the number of theoretical plates is 137, and the reflux ratio is 36; the pressure of the toluene refining tower (5) is controlled at 30KPa, and the temperature at the top of the tower is controlled at 126.9°C , the number of theoretical plates is 122, the reflux ratio is 10, and the crystallization temperature of the crystallizer (47) is 20°C.

[0021] The processing capacity of methanol synthetic oil is 250,000 tons / year, and the annual work is calculated based on 8,000 hours:

[0022] product

[0023] product

Embodiment 2

[0025]The light removal tower (1) pressure is controlled at 80KPa, and the tower top temperature is controlled at 13.2 ℃, and the number of theoretical plates is 70, and the reflux ratio is 2; 90.3°C, the number of theoretical plates is 90, and the reflux ratio is 10; the pressure of the trimethylene pre-separation tower (3) is controlled at 40KPa, the temperature at the top of the tower is controlled at 118°C, the number of theoretical plates is 130, and the reflux ratio is 13; The pressure of the toluene refining tower (4) is controlled at 50KPa, the temperature at the top of the tower is controlled at 110°C, the number of theoretical plates is 140, and the reflux ratio is 34; the pressure of the toluene refining tower (5) is controlled at 50KPa, and the temperature at the top of the tower is controlled at 130°C , the number of theoretical plates is 132, and the reflux ratio is 12; the crystallization temperature of the crystallizer (47) is 10°C.

[0026] The processing capa...

Embodiment 3

[0029] Light removal tower (1) pressure is controlled at 100KPa, tower top temperature is controlled at 10.4 ℃, and theoretical plate number is 100, and reflux ratio is 3; 113.5 ℃, the number of theoretical plates is 100, and the reflux ratio is 12; The pressure of the toluene refining tower (4) is controlled at 80KPa, the temperature at the top of the tower is controlled at 128.5°C, the number of theoretical plates is 150, and the reflux ratio is 40; the pressure of the toluene refining tower (5) is controlled at 40KPa, and the temperature at the top of the tower is controlled at 136°C , the number of theoretical plates is 140, and the reflux ratio is 15; the crystallization temperature of the crystallizer (47) is -5°C.

[0030] The processing capacity of methanol synthetic oil is 50,000 tons / year, and the annual work is calculated as 8,000 hours

[0031] product

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Abstract

The invention relates to a device and a process for the separation and purification of methanol synthetic oil containing high-content aromatic hydrocarbon. The process comprises the following steps: removing light components from the methanol synthetic oil through a light component removal column, allowing the heavy components at the bottom of the light component removal column to enter a pre-sorting column of p-xylene and m-xylene to extract p-xylene and m-xylene having higher concentration, and purifying the p-xylene and m-xylene in a treating column; allowing the heavy components at the bottom of the pre-sorting column to enter a pre-sorting column of pseudocumene, extracting pseudocumene having higher concentration at the bottom of the pre-sorting column of pseudocumene, and obtaininghigh-purity pseudocumene in a treating column of pseudocumene; allowing the durene rich liquid obtained at the bottom of the pre-sorting column of pseudocumene to enter a crystallizer to carry out the crystallization and purification, so as to obtain high-purity durene; and mixing the stream oil products and the mother liquid returned by the crystallizer to obtain qualified gasoline. The invention has the advantages that the invention provides a process and a device for the separation and purification of methanol synthetic oil containing high-content aromatic hydrocarbon, so as to obtain p-xylene, m-xylene, pseudocumene and durene having high added value on the basis of gasoline-rich products.

Description

technical field [0001] The invention relates to the technical field of rectification, in particular to a separation and purification device and process for methanol-synthetic oil containing high aromatics. Background technique [0002] There are a lot of lignite reserves in my country, and the discovered lignite resources are 129.132 billion tons, accounting for about 12.7% of my country's coal reserves. Due to the low carbon content and heat release of lignite, and the large smoke during combustion, its application is limited to thermal power generation Factory and civil use etc. Methanol-to-gasoline technology usually uses coal or natural gas as raw material to produce synthesis gas, then uses synthesis gas to produce methanol, and finally converts crude methanol into high-octane gasoline. Due to its relatively high hydrogen content, lignite is easier to liquefy than other coals. Based on this feature, it is more attractive to produce synthesis gas, methanol, and finally g...

Claims

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Application Information

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IPC IPC(8): C10G53/00
Inventor 张敏革王磊丁辉刘志云李鑫钢隋红段红张艳华李洪罗铭芳王哲陈娟娟
Owner TIANJIN UNIV
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