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Process for separating and recovering organic matter in low-temperature Fischer-Tropsch synthesizing reaction

A Fischer-Tropsch synthesis, separation and recovery technology, applied in the field of separation, can solve problems such as strong non-ideality, complex system composition, and corrosiveness

Active Publication Date: 2008-08-20
YANKUANG ENERGY R&D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a word, low-temperature Fischer-Tropsch synthesis reaction water has the following characteristics: (1) The composition of the system is complex; (2) The non-ideality is strong, and there may be a variety of azeotropes; (3) The system contains acids and is corrosive
These characteristics make the separation and recovery of main organic matter in low-temperature reaction water more difficult, and it is necessary to find an economical and effective method for separation and recovery of main organic matter in low-temperature Fischer-Tropsch reaction water

Method used

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  • Process for separating and recovering organic matter in low-temperature Fischer-Tropsch synthesizing reaction
  • Process for separating and recovering organic matter in low-temperature Fischer-Tropsch synthesizing reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Such as figure 1 As shown, a method for separating and recovering main oxygen-containing organic substances in low-temperature Fischer-Tropsch synthesis reaction water by means of rectification, the method includes using low-temperature Fischer-Tropsch synthesis reaction water as a raw material, and using a rectification tower to separate the reaction water raw material , the top of the rectifying tower is provided with a condenser, and the bottom of the tower is provided with a reboiler. Rectify under the conditions of temperature, pressure, and reflux ratio that are properly adjusted. If extraction or azeotropic distillation is performed, it is necessary to select an appropriately adjusted amount of extractant or azeotrope and the location of addition to obtain acetone, methyl ethyl ketone, methanol, ethanol, n-propanol product. Described reaction water raw material forms and adds:

[0066]

[0067] When adjusting the operating conditions of each rectifying tower...

Embodiment 2

[0073] A method for separating and recovering organic matter in low-temperature Fischer-Tropsch synthesis reaction water. The process of the method is the same as in Example 1, and the raw material composition of the reaction water is the same as in Example 1.

[0074] When adjusting the operating conditions of each rectifying tower as follows,

[0075]

[0076] The separation and recovery results are:

[0077] product name

Embodiment 3

[0079] A method for separating and recovering organic matter in low-temperature Fischer-Tropsch synthesis reaction water, the process of the method is the same as in Example 1, and the raw material composition of low-temperature reaction water is as follows:

[0080]

[0081] When adjusting the operating conditions of each rectifying tower as follows,

[0082]

[0083] The separation and recovery results are:

[0084] product name

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Abstract

The invention relates to a method for separating and recovering organic compounds in low temperature fischer-tropsch synthesizing and reacting water, which includes the following parts: (1) methanol / ethanol is distillated and separated after organic acid distillation and removal; (2) methanol / ketone is extracted, distillated and separated; (3) acetone-butanone is separated and recovered; (4) acetone is refined; (5) water in butanone aqueous solution is eliminated and butanone product is obtained; (6) n-propanol is recovered and separated; aqueous solution of alcohol is obtained by further distillation of the bottom of a methanol / ethanol distillation tower; ethanol with little water is obtained in the top of the tower; aqueous solution with n-propanol is obtained in the bottom of the tower; the aqueous solution with n-propanol is concentrated and distillated in a n-propanol concentration tower, and then quick lime is added; an n-propanol product is obtained after distillation; (7) ethanol is prepared by a constant boiling rectification method. The method for separating and recovering organic compounds in low temperature fischer-tropsch synthesizing and reacting water separates and recovers methanol, ethanol, n-propanol, acetone and butanone in low temperature fischer-tropsch synthesizing and reacting water effectively and sequentially, the purity of which reaches to national product standard; the yield rate of the acetone is 87 percent above, and the yield rate of other products is above 90 percent.

Description

technical field [0001] The invention relates to a separation method, in particular to a method for separation and recovery of organic matter in low-temperature Fischer-Tropsch synthesis reaction water. Specifically, the content of methanol in the low-temperature Fischer-Tropsch synthesis reaction water is 0.12% to 0.25%, the content of acetone is 0.29% to 2.97%, the content of butanone is 0.06% to 0.56%, the content of ethanol is 1.31% to 5.33%, and the content of propanol is 0.28% to 1.10%. %, using a series of rectification methods to separate and recover methanol, ethanol, n-propanol, acetone, butanone products with high recovery rate and purity. Background technique [0002] The development of coal liquefaction has become a long-term strategic measure for my country to solve the contradiction between oil supply and demand. The Fischer-Tropsch synthesis reaction is the core reaction of indirect coal liquefaction. The temperature of the low-temperature Fischer-Tropsch syn...

Claims

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Application Information

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IPC IPC(8): C07C31/02C07C49/04C02F9/10C02F1/04C02F1/24
CPCY02P20/582
Inventor 孙启文杨莉赵东志岳建平杨正伟刘继森黄海
Owner YANKUANG ENERGY R&D CO LTD
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