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Device and method for separating olefin from Fischer-Tropsch synthetic oil

A Fischer-Tropsch synthetic oil and olefin technology, which is applied in the field of coal chemical industry, can solve the problems of high equipment operation cost, low economic value, and complicated process flow, and achieve the effects of reducing high operating cost, improving economic benefits, and simple process

Inactive Publication Date: 2019-04-19
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the complex technological process in the existing equipment, the high operating cost of the required equipment, and the defects of low economic value, thereby providing a device for separating olefins from Fischer-Tropsch synthetic oil

Method used

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  • Device and method for separating olefin from Fischer-Tropsch synthetic oil
  • Device and method for separating olefin from Fischer-Tropsch synthetic oil
  • Device and method for separating olefin from Fischer-Tropsch synthetic oil

Examples

Experimental program
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Effect test

Embodiment 1

[0048] This example provides a method for separating olefins from Fischer-Tropsch synthetic oil. The method comprises the steps of:

[0049] Cut the C5 fraction from the iron-based Fischer-Tropsch synthetic oil and pass it into the extraction fraction section 1. The inlet of the C5 fraction is the dividing line, the upper section is the extraction and rectification section, and the lower section is the extraction and distillation section. The extractant 4 is passed into 1, and the olefin 6 is separated in the side rectification section 2 by using the extractant 4.

[0050] In this experimental example, the parameters of the dividing wall column T1 are selected as follows: the number of plates in the main column is 30, the reflux ratio in the main column area is 3, the temperature at the top of the column is 60°C, the temperature at the bottom of the column is 145°C, the pressure inside the column is 1 atm, and the secondary The number of plates is 25, the extractant 4 is N,N-...

Embodiment 2

[0055] This example provides a method for separating olefins from Fischer-Tropsch synthetic oil. The method comprises the steps of: passing the C6 fraction of the iron-based Fischer-Tropsch synthetic oil into the extraction fraction section 1, the inlet of the C6 fraction is the dividing line, the upper section is the extraction and rectification section, and the lower section is the extraction and distillation section, and The extraction agent 4 is passed into the extraction fraction section 1, and the olefin 6 is separated in the side line rectification section 2 by using the extraction agent 4. In this experimental example, the number of trays in the main tower is 60, the reflux ratio in the main tower area is 2, the temperature at the top of the tower is 106°C, the temperature at the bottom of the tower is 192°C, the pressure inside the tower is 3 atm, and the number of trays in the side line rectification section is is 40, the extractant 4 is N-methylpyrrolidone, and the ...

Embodiment 3

[0061] This example provides a method for separating olefins from Fischer-Tropsch synthetic oil. The method comprises the following steps: passing the C7 fraction cut from the iron-based Fischer-Tropsch synthetic oil into the extraction fraction section 1, the inlet of the C7 fraction is the dividing line, the upper section is the extractive distillation section, and the lower section is the extraction section 1. Distillation section, and the extraction agent 4 is passed into the extraction fraction section 1, and the olefin 6 is separated in the side rectification section 2 by using the extraction agent 4.

[0062] In this experimental example, the number of trays in the main tower is 60, the reflux ratio in the main tower area is 3, the temperature at the top of the tower is 139°C, the temperature at the bottom of the tower is 242°C, the pressure inside the tower is 3atm, and the number of trays in the auxiliary tower is 40 , the extractant 4 is N-methylpyrrolidone; the mass...

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Abstract

The invention discloses a device and a method for separating olefin from Fischer-Tropsch synthetic oil. The device combines a partition wall tower and an extractive rectification technology, a partition plate is arranged in the partition wall tower, the partition wall tower is divided into an extractive fraction part, a rectification part and a public stripping part, and the extractive fraction part is used for extracting alkane; the side line rectification section is used for extracting olefin, and the public stripping section is used for extracting the mixture of oxygen-containing compound and extractant, thereby realizing the purpose that alkane, olefin and oxygen-containing compound can be simultaneously separated from the cut Fischer-Tropsch synthetic oil in a partition tower, and caneffectively reduce the problems of high equipment cost and high operation cost when olefin is separated from the Fischer-Tropsch synthetic oil fraction, thereby improving the economic benefit of theoil product.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a device and method for separating olefins from Fischer-Tropsch synthetic oil. Background technique [0002] At present, coal-based Fischer-Tropsch crude oil products are mainly used as primary chemical raw materials or fuel oil, with low economic benefits and weak market competitiveness. After analysis, Fischer-Tropsch synthetic oil crude oil products have complex components, including long-chain olefins, normal alkanes, and oxygenates such as alcohols, ketones, aldehydes, and esters. Long-chain olefins are the main components of high-end oil products. If long-chain olefins (carbon chain length ≥ 5) in Fischer-Tropsch crude oil products are separated, not only long-chain olefins with high added value can be obtained, but also High-end oil products such as clean and high-quality aviation kerosene, extracted solvent oil, and lubricating oil with long chains, so as to improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G7/00C10G7/08C07C7/04C07C11/02
CPCC07C7/04C10G7/00C10G7/08C10G2300/1022C07C11/02
Inventor 屈一新李阳王际东孔繁华程毅张君梁丽康善娇
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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