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Aromatic hydrocarbon extraction method

An aromatic hydrocarbon extraction and aromatic hydrocarbon technology, which is applied in the directions of extraction and purification/separation, multi-stage series-connected refining process treatment, etc. The effect of backwash strength, small footprint, and wide adaptability of raw materials

Inactive Publication Date: 2015-06-10
杨志强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current extraction method of aromatics suffers from high energy consumption, long process flow, and large floor area; which in turn leads to relatively high investment and operating costs

Method used

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  • Aromatic hydrocarbon extraction method
  • Aromatic hydrocarbon extraction method
  • Aromatic hydrocarbon extraction method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 Shown is a schematic flow diagram of an embodiment of the present invention, and some auxiliary equipment such as tanks, pumps, heat exchangers, condensers, etc. are not marked in the figure, but this is well known to those skilled in the art.

[0025] Such as figure 1 Shown, C6-C9 component gasoline, aromatics content is 70.65% (see Table 1-1 for raw material properties) with the flow rate of 100 tons / hour and the flow rate of 300 tons / hour with solvent and add extraction tower 1 together and extract, The temperature of the extraction tower 1 is 90° C., the pressure is 0.7 MPa, the solvent ratio is 3, the solvent used is sulfolane, the aromatics content of the obtained raffinate is 0.3%, and the solvent content is 2 ppm. Washing water enters the upper part of the extraction tower at a flow rate of 3.0 tons / hour, and the obtained raffinate oil after washing is sent out of the device at a flow rate of 28.96 tons / hour. The first rich solvent obtained fr...

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Abstract

The invention relates to an aromatic hydrocarbon extraction method which comprises an extraction tower. The method is characterized in that a raffinate oil product is directly recovered from the top of the extraction tower; the bottom of the extraction tower is connected with a stripping tower through a pipeline; washing water enters the extraction tower from the top of the extraction tower; the top of the stripping tower is respectively connected with the bottoms of a feed tower and the extraction column through pipelines; the bottom of the stripping tower is connected with a recovery tower through a pipeline; aromatic hydrocarbons from the top of the recovery tower are directly discharged out of the device; and the bottom of the recovery tower is connected with the upper part of the extraction tower. Compared with the common aromatic hydrocarbon extraction processes, the extraction method provided by the invention has the advantages of high product quality, low investment and land saving. The method can treat diversified raw materials, and can treat reformed gasoline and ethylene cracked gasoline. The extraction tower has the functions of extracting aromatic hydrocarbons and washing raffinate oil with water.

Description

technical field [0001] The invention relates to an aromatic hydrocarbon extraction method. Background technique [0002] Aromatic hydrocarbon is an important basic raw material of petrochemical industry. Aromatic hydrocarbon contains various components, the most important of which are benzene, toluene and xylene. With the development of oil refining industry and the growth of demand for aromatics, petroleum aromatics have become the main source of aromatics. In addition, as environmental protection requirements become more and more stringent, the specifications of petroleum products (fuels) become more and more stringent. Taking gasoline as an example, new gasoline specifications have been implemented in the United States, Europe, Japan and other countries in recent years. The current gasoline standards in my country clearly stipulate that the benzene content is less than 1.0% (V), and the total aromatic content is not more than 40% (V ). In this case, the separation of ar...

Claims

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Application Information

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IPC IPC(8): C10G53/04C07C7/10C07C15/04C07C15/06C07C15/08
Inventor 杨志强
Owner 杨志强
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