Method for extracting naphthalin from heavy C10 aromatic solvent oil by integral device

An aromatic solvent oil and heavy technology, applied in chemical instruments and methods, organic chemistry, hydrocarbons, etc., can solve the problems of complex processing, difficult crystallization temperature control, unfavorable naphthalene refining, etc., and achieve the effect of simple process

Inactive Publication Date: 2018-03-20
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The extraction of naphthalene by multiple brief crystallization methods not only has complex processing and difficult crystallization temperature control, but also changes in operating temperature during crystallization and filtration affect product quality and yield, which is not conducive to the purification of naphthalene

Method used

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  • Method for extracting naphthalin from heavy C10 aromatic solvent oil by integral device
  • Method for extracting naphthalin from heavy C10 aromatic solvent oil by integral device
  • Method for extracting naphthalin from heavy C10 aromatic solvent oil by integral device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Integrated device in the inventive method, its result is as figure 1 As shown, it includes a multi-stage axially stirred crystallizer device, a filter device and a collection device 18;

[0024] The upper end of the filter device is connected to the multi-stage axial stirring crystallizer device, the lower end is connected to the collection device 18, and the upper grinding port 12 and the lower grinding port 13 are provided in the middle, which can separate the upper and lower parts of the filter device. Plate 15, the surface of filter plate 15 is covered with filter paper 14;

[0025] The multi-stage axial stirring crystallizer device includes a stirring shaft 7 inside it, the upper end of which passes through the opening of the device and is connected to the driving device 5, and a first jacket 8 inside it, which isolates its internal space into a stirring shaft The space where 7 is located and the constant temperature medium passes through the space, and the feed p...

Embodiment 2

[0039] Utilize above-mentioned integrated device to extract the method for naphthalene in heavy C10 aromatic solvent oil:

[0040] According to the operating method of the above-mentioned device, the raw material heavy C 10 Aromatic solvent oil (the naphthalene content is about 43%, and the remaining composition is shown in Table 1) is added from the feed port, the feed speed and the rotating speed of the stirring shaft are controlled, the crystallization and filtration are controlled to the same temperature by a constant temperature medium, and the filter device is vacuumed In a vacuum state, the raw material flows downward from the multi-stage axially stirred crystallizer device into the filter device, vacuum filtration is carried out in the filter device, and finally the filtrate is collected through the collection device, and the filter cake is collected through the filter device, and the obtained filter cake is The extracted naphthalene.

[0041] In the method, the feed ...

Embodiment 3

[0059] Device and method are with embodiment 1 and embodiment 2, and difference only is as follows:

[0060] The feed rate is 20ml / h, the rotation speed is 40rpm, and the crystallization and filtration temperature is 30-31°C.

[0061] The final naphthalene content and yield reached 98.75% and 96.33%.

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Abstract

The invention discloses a method for extracting naphthalin from heavy C10 aromatic solvent oil by an integral device. The integral device comprises a multistage axial stirring crystallizer device, a filter device and a collecting device which are sequentially connected from top to bottom. The method comprises the following steps of adding the raw material of heavy C10 aromatic solvent oil from a feeding opening; controlling the feeding speed and the rotating speed of the stirring shaft; controlling the crystallization and the filtering to be at the same temperature through constant temperaturemedia; performing vacuum pumping on the filter device so that the filter device is in a vacuum state; downwards flowing the raw materials into the filter device from the multistage axial stirring crystallizer device; performing vacuum filtering in the filter device; finally, collecting filter liquid through the collecting device; collecting filter cake through the filter device, wherein the filter cake is the extracted naphthalin. The method has the advantages that the process is simple; the continuous operation can be realized; the used device is integral; the crystallization and the filtering can be conveniently controlled to be at the same temperature; after the condition of optimization separation, the naphthalin content in the light C10 aromatic solvent oil is lower than 3 percent; the content and the yield of naphthalin are as high as 99.54 percent and 97.17 percent or higher.

Description

technical field [0001] The invention discloses an integrated device for extracting heavy C 10 The invention relates to a method for naphthalene in aromatic solvent oil, which belongs to the technical field of extraction of chemical raw materials. Background technique [0002] Heavy aromatic solvent oil refers to C 10 Aromatics in the extraction of light C 10 The remaining fraction after aromatic solvent naphtha contains about 40% naphthalene. Extraction of Heavy C by Efficient Methods 10 Naphthalene in aromatic hydrocarbon solvent oil, and make the naphthalene content in heavy aromatic hydrocarbon solvent oil less than 3%, not only to obtain light C 10 Aromatic solvent naphtha, while obtaining naphthalene, can effectively improve heavy C 10 Added value of aromatic solvent oil. light C 10 Aromatic solvent oil has an aromatic smell and strong solubility, and can be mixed with ethanol, ether, acetone, chloroform and carbon disulfide in any proportion. It can be used as c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/00C07C7/14C07C15/24
CPCC07C7/005C07C7/14C07C15/24
Inventor 顾正桂曹晓艳凌鸿钰
Owner NANJING NORMAL UNIVERSITY
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