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Method and device for extracting durene from methanol synthetic oil

A methanol synthetic oil and durene technology, applied in the field of rectification, can solve the problems of complex synthetic oil components and high energy consumption, and achieve the effects of improving market competitiveness, reducing process energy consumption, and considerable economic benefits

Active Publication Date: 2014-09-24
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complexity of synthetic oil components, in addition to removing gasoline components and rich gas through normal pressure or slightly positive pressure operations, the durene enriched liquid needs to go through two rectification towers for removing light components and removing heavy components. operation, the energy consumption is high, and at least two rectification towers are required to realize the operation

Method used

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  • Method and device for extracting durene from methanol synthetic oil
  • Method and device for extracting durene from methanol synthetic oil

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Experimental program
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Effect test

Embodiment 1

[0023] The processing capacity of the raw material methanol synthetic oil is 30 tons / hour, and the mass content of durene is 2%. The pressure at the top of the fractionation tower (1) is 100kPa, and the temperature is 70°C; the pressure at the top of the dividing wall tower (2) is 2kPa, and the temperature is 30°C; the operating temperature of the crystallization system (9) is -20°C, and the remaining crystallization mother liquor (24) is directly extracted Do not return to the next tower.

[0024] The durene obtained by the method is 0.6 tons / hour, the purity is 99.9%, the durene product yield is 99.9%, and the energy consumption is saved by about 30% compared with the conventional process.

Embodiment 2

[0025] Embodiment 2: the present invention can also be realized through the following technical solutions:

[0026] The processing capacity of the raw material methanol synthetic oil is 30 tons / hour, and the mass content of durene is 10%. Fractionation tower (1) tower top pressure is 300kPa, and temperature is 180 DEG C; Dividing wall tower (2) tower top pressure is 300kPa, and temperature is 180 DEG C; Crystallization system (9) operating temperature is 95 DEG C, remaining crystallization mother liquor (24) returns to the next wall tower, Such as figure 2 shown.

[0027] The durene obtained by the method is 2.3 tons / hour, the purity is 95%, and the yield of the durene product is 91.0%, and the energy consumption is saved by about 10% compared with the conventional process.

Embodiment 3

[0028] Embodiment 3: the present invention can also be realized through the following technical solutions:

[0029] The processing capacity of raw material methanol synthetic oil is 30 tons / hour, and the mass content of durene is 20%. Fractionation tower (1) tower top pressure is 200kPa, temperature 100 ℃; Dividing wall tower (2) tower top pressure 100kPa, temperature 200 ℃; Crystallization system (9) operating temperature is 40 ℃, remaining crystallization mother liquor (24) partly returns the dividing wall tower ,Such as figure 2 shown.

[0030] The durene obtained by the method is 9.9 tons / hour, the purity is 60%, and the yield of the durene product is 94.9%. Compared with the conventional process, the energy consumption is saved by about 15%.

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Abstract

The invention relates to a method and a device for extracting durene from methanol synthetic oil. The device comprises a fractionating tower, a dividing wall tower crystallization system and a plurality of pumps, wherein condensers and return tanks are arranged at the tops of the fractionating tower and the dividing wall tower; reboilers are arranged at the bottoms of the towers; a partition plate is arranged inside the dividing wall tower; the dividing wall tower is partitioned into a distillation zone I, a feeding zone II, an intermediate product zone III and an extraction zone IV; a raw material enters the fractionating tower, and is connected to a dividing wall tower feeding zone II from a discharge pipeline at the bottom of the fractionating tower; the intermediate product zone III of the dividing wall tower is arranged in an opening of a dividing wall tower discharge pipe; and the opening of the dividing wall tower discharge pipe is connected to the inlet of the crystallization system by adopting a production line. The functions of lightly cutting, heavily cutting and gathering and refining the durene are integrated into the dividing wall tower to achieve after naphtha and the like in the synthetic oil are removed, and the equipment such as a rectifying tower, attached condensers and reboilers thereof and the like can be removed. Thus, energy consumption and equipment investment in the process are reduced, and the energy consumption in the process can be reduced by over 10% by adopting the dividing wall tower technology.

Description

technical field [0001] The invention relates to the technical field of rectification, in particular to a method and a device for extracting durene from methanol synthetic oil. Background technique [0002] Today, human demand for oil is increasing year by year, international crude oil prices continue to rise, while the world's oil reserves are decreasing year by year, and a larger and larger space will be formed between the two curves. This has triggered an upsurge of international research on alternative energy technologies, and the "coal-to-oil" technology can fill this gap. [0003] Methanol is the cornerstone of petrochemical industry, through proper reaction, it can be converted into various petrochemical products. The research on producing synthesis gas, methanol, and finally gasoline from coal has been given high attention in domestic and foreign research. Methanol conversion to gasoline (MTG) technology is a technology invented by Mobil Corporation to convert metha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/00C07C7/04C07C7/14C07C15/02C10G53/02
Inventor 李洪李鑫钢高鑫王磊丛山刘志云段虹李云石荣方
Owner TIANJIN UNIV
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