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Method for eliminating arene from kerosene distillation fraction

A technology of kerosene and distillates, applied in the field of refining aromatics, can solve the problems of high energy consumption and achieve the effect of improving separation efficiency and low toxicity

Active Publication Date: 2005-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned method of using N-methylpyrrolidone as a solvent to extract and remove aromatics in distillate oils can effectively remove aromatics in distillate oils, but the operation process consumes a lot of energy

Method used

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  • Method for eliminating arene from kerosene distillation fraction

Examples

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example 1

[0025] Prepare the sorbent.

[0026] Get 150 grams of coarse-porous silica gel (produced by Qingdao Ocean Chemical Factory), and activate it in the air at 150°C for 2.5 hours to obtain adsorbent A, wherein the pores of 40-50 Å account for 92% of the total pore volume, and the average particle diameter is 0.1-0.8 mm, wherein particles with a diameter of 0.65-0.8 mm account for 20% by mass, particles with a diameter of 0.2-0.65 mm account for 70% by mass, and particles with a diameter of 0.1-0.2 mm account for 10% by mass, and the surface hydroxyl content is 2.0 mmol / g SiO 2 .

example 2

[0028] After getting 92 grams of NaX zeolite and 8 grams of aluminum hydroxide powder and mixing evenly, roll the ball into shape, and the deionized water sprayed into when rolling the ball is 10 grams in total. Then sieve the ball into small balls with a particle size of 0.2-0.8 mm, and roast at 540°C for 4 hours to obtain Adsorbent B, which contains 92% by mass of NaX zeolite, and the rest is γ-Al 2 o 3 .

example 3

[0030] The following example is an experiment of adsorption separation and dearomatization of kerosene fraction.

[0031]Take 100 grams of adsorbent A and place it in an adsorption column with a diameter of φ20×1200 mm, and feed kerosene raw material for adsorption operation. The operating conditions are: 25°C, kerosene feed volume space velocity 1.0 -1 , The feed oil / agent mass ratio is 0.8. After the adsorption is saturated, feed the displacement agent isopropanol into the adsorption column to replace the kerosene fraction in the dead volume of the adsorption column from the adsorption column. When the volumetric space velocity of the isopropanol feed is 1.0 -1 , the volume ratio of isopropanol feed to adsorbent was 0.3. Then feed the desorbing agent n-hexane to the adsorption column, when the feed volume space velocity of n-hexane is 2.0 -1 , the volume ratio of n-hexane feed to adsorbent was 1.5. The properties and compositions of the kerosene raw material and the sorb...

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Abstract

This invention provides a method for removing aromatic hydrocarbons from kerosene fraction. It is characterized by that: the raw material kerosene fraction is contacted with adsorbent at temp. of 25-100 deg.C to adsorbing the aromatic hydrocarbon therewith. The normal paraffin hydrocarbon is used as desorption agent, such as C5-C7 paraffin hydrocarbon, to proceed desorption of above-said adsorbent absorbing aromatic hydrocarbons already. Said adsorbent can be selected from silicon dioxide, NaX or NaY. The kerosene produced by using said process for removing aromatic hydrocarbons can be excellent raw material of steamed cracking.

Description

technical field [0001] The present invention is a method for adsorbing and separating refined petroleum fractions, specifically, a refining method for removing aromatics in kerosene fractions through adsorption and separation. Background technique [0002] Steam cracking is the main technical means to produce ethylene. At present, 60% of steam cracking raw materials come from naphtha fraction, but due to the limitation of crude oil resources and existing refinery production capacity, it is difficult to further increase naphtha fraction to meet the demand of ethylene production in a short period of time. Expanding steam cracking raw material resources and adopting high-quality heavy cracking raw materials is one of the effective measures to alleviate this contradiction. [0003] Straight-run kerosene contains more paraffins and is an effective heavy cracking raw material, but it contains a certain amount of aromatics. According to the reaction principle of steam cracking to...

Claims

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Application Information

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IPC IPC(8): C10G25/00
Inventor 姚志龙郁灼张宝贵
Owner CHINA PETROLEUM & CHEM CORP
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