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Method of removing aromatic hydrocarbons by using solvent naphtha

A technology for dearomatization and solvent oil, applied in the field of solvent oil dearomatization, can solve the problems of unsatisfactory requirements, large investment, low dearomatization depth, etc., and achieve good effect of dearomatization and simple process

Inactive Publication Date: 2011-10-19
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The dearomatization methods mentioned in the above patents all have the disadvantages of large investment and low dearomatization depth
Cannot meet the requirements of deep dearomatization of solvent oil

Method used

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  • Method of removing aromatic hydrocarbons by using solvent naphtha
  • Method of removing aromatic hydrocarbons by using solvent naphtha

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Prepare a model solvent oil with benzene and isooctane according to 1% benzene content, and then add triisopropylbenzene to the model solvent oil as a dearomatization agent according to triisopropylbenzene:benzene (mol)=4:1. The alkylation reaction is carried out in a fixed bed integration reactor, the middle part of the reactor is filled with USY zeolite catalyst, and the upper and lower parts of the reactor are filled with quartz sand. The mixed raw materials are pumped into the reactor from the bottom of the reactor. The reaction temperature is 180°C, the reaction pressure gauge is 3MPa, the mass space velocity of the raw material feed is 2h-1, the product after the reaction is fractionated and cut at 150°C, and the benzene content in the fraction before 150°C is detected by gas chromatography to reduce to 0.2773% (wt), benzene removal rate reached 73.27%

Embodiment 2

[0015] Prepare a model solvent oil with benzene and isooctane according to 1% benzene content, and then add triisopropylbenzene to the model solvent oil as a dearomatization agent according to triisopropylbenzene:benzene (mol)=6:1. Using the same reaction device and catalyst as Example 1, the reaction temperature is 180 ° C, and the raw material feed quality space velocity is 2h -1 , the product after the reaction was cut by fractional distillation at 150°C, and the benzene content in the fraction before 150°C was detected by gas chromatography was reduced to 0.2266% (wt), and the benzene removal rate reached 77.34%

Embodiment 3

[0017] Prepare a model solvent oil with benzene and isooctane according to 1% benzene content, and then add triisopropylbenzene to the model solvent oil as a dearomatization agent according to triisopropylbenzene:benzene (mol)=6:1. Using the same reaction device and catalyst as in Example 1, the reaction temperature is 180°C, and the mass space velocity of the raw material feed is 0.5h -1 , the product after the reaction was cut by fractional distillation at 150°C, and the benzene content in the fraction before 150°C was detected by gas chromatography was reduced to 0.001% (wt), and the benzene removal rate reached 99.9%

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Abstract

The invention discloses a method of removing aromatic hydrocarbons by using solvent naphtha, belonging to the technical field of solvent naphtha refining. The method comprises the following steps of: feeding a raw material formed by mixing the solvent naphtha and a dearomatization solvent into a reactor, reacting aromatic hydrocarbons in the solvent naphtha with the dearomatization solvent in an acid catalyst to generate alkyl aromatic hydrocarbons with a higher boiling point, and reacting to obtain dearomatization solvent naphtha by adopting a fractional distillation cutting method, wherein the transfer reaction temperature of alkyls is 160-220 DEG C, the reaction pressure of the alkyls is 1-5 MPA as gage pressure, the mass space velocity of the raw material is 0.5-20h-1, the molar ratioof the dearomatization solvent to the aromatic hydrocarbons in the solvent naphtha is (-10):1, the dearomatization solvent is triisopropylbenzene or diisopropylbenzene, and the catalyst is a solid acid catalyst. The method has a simple process and can be used for achieving a better dearomatization effect and producing the dearomatization solvent naphtha having stricter requirements on the contentof aromatic hydrocarbons.

Description

technical field [0001] The invention relates to a solvent oil dearomatization method, which belongs to the technical field of solvent oil refining. Background technique [0002] Solvent oil is one of the very important petroleum products. As an important organic chemical raw material oil, it is widely used in various industries of the national economy such as machinery, metallurgy, electronics, chemical industry, medicine, food, agriculture, forestry, and textiles. The production of solvent oil needs to go through two processes of cutting and refining. Cutting is to cut the light straight run cut from the atmospheric tower into appropriate narrow cuts, or to fractionate the reformed raffinate. The solvent oil obtained through these processes contains a large amount of aromatic hydrocarbons and other unsaturated olefins. In addition, the sulfur and nitrogen content are relatively high. The product is highly toxic, dark in color, and strong in taste. It is far from the standa...

Claims

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Application Information

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IPC IPC(8): C10G53/02
Inventor 陈标华李红坤黄崇品张傑
Owner BEIJING UNIV OF CHEM TECH
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