A method for comprehensive utilization of olefins in Fischer-Tropsch synthesis light distillate oil

A technology of light distillate oil and Fischer-Tropsch synthesis, which is applied in distillation purification/separation, preparation of ether by addition of unsaturated compounds, preparation of ether, etc. It can solve problems such as air pollution, reduce consumption, and alleviate the contradiction between supply and demand.

Active Publication Date: 2015-12-30
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the content of olefins in the C5 fraction is higher than that in the C6 and C8 fractions. If these olefins are kept in gasoline products, under the irradiation of ultraviolet rays, they can mix with NOx in the atmosphere to form toxic chemical smog, which seriously pollutes the atmosphere. This part of abundant carbon pentaolefin resources urgently needs to be rationally developed and utilized

Method used

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  • A method for comprehensive utilization of olefins in Fischer-Tropsch synthesis light distillate oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Fischer-Tropsch light C5 distillate oil 1 enters an extractive distillation tower with a theoretical plate number of 74, the extraction agent selected is N, N-dimethylformamide (DMF), the reflux ratio is 8.5, and the feed position is (from From top to bottom, the same below) 3 and 20, a stream 3 rich in 1-pentene is obtained from the top of the extractive distillation tower, and a stream 6 of extractant and raffinate carbon five components is obtained from the bottom of the extractive distillation tower; The weight ratio of the raw material to the extractant is 15:1, the feed temperature of the extractant is 20°C, the temperature at the top of the tower is 25°C, the temperature at the bottom of the tower is 55°C, and the operating pressure is normal pressure.

[0029] The stream 3 enters a precision rectification tower with a theoretical plate number of 214, the reflux ratio is 10.54, and the feed position is 152, and the 1-pentene refined stream 4 can be obtained from t...

Embodiment 2

[0038] Fischer-Tropsch light C5 distillate oil 1 enters the extractive distillation tower with a theoretical plate number of 74. The extraction agent selected in this implementation case is N,N-dimethylformamide (DMF), the reflux ratio is 9, and the feed The positions are (from top to bottom, the same below) 3 and 20, the stream 3 rich in 1-pentene is obtained from the top of the extractive distillation tower, and the extractant and raffinate carbon five components are obtained from the bottom of the extractive distillation tower The stream 6; the weight ratio of the raw material and the extractant is 20:1, the feed temperature of the extractant is 30°C, the temperature at the top of the tower is 40°C, the temperature at the bottom of the tower is 70°C, and the operating pressure is normal pressure.

[0039] The stream 3 enters a precision rectification tower with a theoretical plate number of 178, a reflux ratio of 13, and a feed position of 126, and the refined stream 4 of 1-...

Embodiment 3

[0048] Fischer-Tropsch light C5 distillate oil 1 enters the extractive distillation tower with a theoretical plate number of 74. The extraction agent selected in this implementation case is N, N-dimethylformamide (DMF), the reflux ratio is 10, and the feed The positions are (from top to bottom, the same below) 3 and 20, the stream 3 rich in 1-pentene is obtained from the top of the extractive distillation tower, and the extractant and raffinate carbon five components are obtained from the bottom of the extractive distillation tower The stream 6; the weight ratio of the raw material and the extractant is 18:1, the feed temperature of the extractant is 25°C, the temperature at the top of the tower is 30°C, and the temperature at the bottom of the tower is 60°C.

[0049] The stream 3 enters a precision rectification tower with a theoretical plate number of 162, the reflux ratio is 15, and the feed position is 115, and the refined stream 4 of 1-pentene can be obtained from the top ...

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Abstract

The invention relates to a comprehensive processing method for olefins in Fischer-Tropsch synthesis light distillate oil. The high-temperature Fischer-Tropsch synthesis C5 light distillate oil is used as raw material, and the raw material is extracted and rectified, and the extractant is N, N-dimethyl formazan Amide, the enriched 1-pentene material obtained at the top of the extractive distillation tower, is further purified by precision rectification to obtain 1-pentene product, and the C5 component and extractant mixture obtained at the bottom of the tower enter the solvent recovery tower for recovery Extractant for recycling; the carbon five components obtained from the top of the solvent recovery tower are subjected to olefin isomerization through the isomerization reactor; the carbon five components rich in isomerized olefins obtained from the isomerization reactor are mixed with methanol enter the etherification reactor together for etherification reaction; the outlet material of the etherification reactor enters the catalytic rectification tower, and realizes the separation of the product methyl tert-amyl ether while carrying out the etherification reaction in the catalytic rectification tower. At the bottom of the distillation tower, the industrially required methyl tert-amyl ether product is obtained. The invention obtains high value-added carbon pentaolefin 1-pentene and clean high-octane gasoline additive methyl tert-amyl ether through deep processing of Fischer-Tropsch carbon five distillate oil.

Description

technical field [0001] The invention relates to the field of modern coal chemical industry, specifically, it is a method for comprehensive utilization of olefins in Fischer-Tropsch synthesis light distillate oil, and belongs to the oil product processing technology in the coal indirect liquefaction industry in coal chemical industry. Background technique [0002] With the enhancement of people's awareness of environmental protection and the continuous consumption of petroleum resources, the research on petroleum alternative energy has gradually deepened. Fischer-Tropsch synthesis of liquid fuels from coal, biomass and natural gas is a way to replace petroleum energy. Fischer-Tropsch synthetic oil has the characteristics of no sulfur, no nitrogen, and no aromatics. It can not only be used as vehicle fuel, but also can be used to produce lubricating oil or chemical products according to its high olefin content, so as to reduce the olefin industry's dependence on petroleum. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/10C07C7/08C07C7/04C07C43/04C07C41/06
Inventor 李晓红吴彦丽李文英冯杰
Owner TAIYUAN UNIV OF TECH
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