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Method for re-purifying and recovering liquid paraffin obtained after solvent extraction

A technology for liquid paraffin and a recovery method, which is applied in the petroleum industry, refined hydrocarbon oil and other directions, can solve the problems of oxidative discoloration of liquid paraffin and high energy consumption of the separation method, and achieves the effects of low cost, environmental protection and simple process flow.

Inactive Publication Date: 2012-07-18
LIAONING GEOLOGY ENG VOCATIONAL COLLEGE
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Problems solved by technology

The prior art also provides a method for recovering liquid paraffin by distillation. For example, in the Chinese patent technology with the patent number 200410012202.4, the distillation method under the temperature condition of 210-320° C. is used to recover liquid paraffin, but this separation method has high energy consumption. problems, especially the technical problem of oxidative discoloration of liquid paraffin at high distillation temperatures

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  • Method for re-purifying and recovering liquid paraffin obtained after solvent extraction
  • Method for re-purifying and recovering liquid paraffin obtained after solvent extraction
  • Method for re-purifying and recovering liquid paraffin obtained after solvent extraction

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Embodiment Construction

[0010] The technical solutions of the present invention will be described in detail below through the given implementation examples.

[0011] Get 1000kg of intermediate liquid paraffin, add it to a volume of 2000L reactor 1, start the stirring device, adjust the number of revolutions to 60 rpm, and slowly add 90kg of waste sulfuric acid with a concentration of 80%, which is used in the preparation of ion exchange resins. The waste sulfuric acid produced can of course be industrial sulfuric acid, stirred for 30 minutes, stopped for 5 hours, and after the upper and lower layers appeared, the lower layer of acid solution was discharged into the waste water and the tank 2; then stirred again, and added 2 % sodium carbonate solution or sodium hydroxide solution, and when the pH value is finally adjusted to 7, the neutralization process ends, and after standing for 1 hour to form the upper and lower layered liquids, a small amount of residual liquid in the lower layer is discharged t...

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Abstract

The invention provides a method for re-purifying and recovering liquid paraffin obtained after solvent extraction. By the recovery method, the liquid paraffin recovered after solvent extraction is performed and the solvent is removed is re-purified. The method mainly comprises the steps of acid washing, neutralizing, washing and settling; impurities such as inorganic salt, gelatin, and surfactant are removed, the heavy-component proportion of the obtained high-purity liquid paraffin is basically consistent with that of the unused industrial liquid paraffin, and the high-purity liquid paraffin can be applied to polymerization reaction of a macroporous ion exchange resin again. The technical scheme has the technical characteristics of simple and short process, and high purification rate.

Description

technical field [0001] The patent application of the present invention relates to a method for recovering waste liquid paraffin produced in the preparation process of macroporous ion exchange resins, in particular to a method for repurifying liquid paraffin after solvent extraction. Background technique [0002] Liquid paraffin is widely used and involves various fields. It is a normal alkane composed of 11 to 18 carbon atoms in the molecule. In the ion exchange resin manufacturing process, liquid paraffin is mainly used as a porogen for polymers. One of the commonly used raw materials for porous ion exchange resins. After the polymerization reaction is completed, the liquid paraffin is usually recovered by solvent extraction, and then the solvent is removed. The prior art also provides a method for recovering liquid paraffin by distillation. For example, in the Chinese patent technology with the patent number 200410012202.4, the distillation method under the temperature co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G21/08
Inventor 孟繁生乔佩科张浏彦李娜
Owner LIAONING GEOLOGY ENG VOCATIONAL COLLEGE
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