Production method of environment-friendly rubber oil

An environment-friendly, oil-extracting technology, applied only in the multi-stage series refining process treatment, lubricating composition, etc., can solve the problems of no novelty, difficult to achieve continuous production, large equipment investment, etc., to improve production capacity and economy. Benefit, reduced frequency and energy consumption, effect of reducing solvent consumption

Active Publication Date: 2010-10-27
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In terms of the production of environmentally friendly rubber oil, some production methods have been proposed at home and abroad, such as the patent application No. 200910050832.3, which proposes to use furfural, phenol and other solvents to extract and remove polycyclic aromatic hydrocarbons in raw oil, and then recycle the solvent to obtain environmentally friendly aromatic hydrocarbons. Oil, the method used in this method is consistent with the current method, and there is no novelty; the existing problem is that it is difficult to achieve continuous production and quality that can meet the requirements simply by using the traditional solvent extraction process
The traditional lubricating oil refining process is to use furfural, phenol, N-methylpyrrolidone (NMP) and other solvent refining processes to remove polycyclic aromatic hydrocarbons and colloids. This process generally uses an extraction tower, and the solvent enters from the upper part of the tower. The oil enters from the lower part of the tower, and the two are in countercurrent contact in the tower. The refined liquid flows out from the upper part of the tower and enters the heating furnace and the evaporation stripping tower, and the refined oil is obtained after recovering the solvent; Extracted oil is obtained after recovering the solvent in the extraction tower. The refined oil obtained by this process is mainly used as lubricating oil. If it is used as rubber oil because of its low aromatic content and poor compatibility with rubber, it is rarely used. The extract

Method used

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  • Production method of environment-friendly rubber oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The PCA content of the third-line distillate produced by a refinery is 13wt%, and the benzopyrene content is 2ppm. Weigh 300g of the third-line distillate oil in the laboratory, add 600g of furfural as a solvent, then stir and heat to 90°C, settle and separate layers, the upper layer is the refined liquid, and the lower layer is the extracted liquid, add 100g of extracted oil to the extracted liquid, and heat The lower layer is found to be divided into two layers, the upper layer is the secondary refining liquid, and the lower layer is the secondary extracting liquid. The secondary extracting liquid is evaporated to remove the solvent to obtain the extracted oil. After the secondary refining liquid is evaporated to remove the solvent, the secondary refined oil is obtained. Its PCA The content is 5.5 wt%, which is slightly higher than the EU standard, but it has been found that using this method can already reduce the PCA considerably.

Embodiment 2

[0017] Add 50g of fresh furfural to the secondary refining liquid in Example 1, and after stirring fully at 60°C, it is found that it is divided into two layers, the upper layer is the refining liquid, and the lower layer is the extraction liquid, and the secondary refining oil is obtained after the solvent is evaporated from the refining liquid , its PCA content is 1.2wt%, in line with EU standards (<3wt%). This shows that further refining with fresh solvent has a good effect.

Embodiment 3

[0019] As the experimental device shown in the accompanying drawing, the extraction tower is 4m high and 10cm in diameter, and wire mesh packing is housed in the tower, and the secondary extraction tower is 4m high and 10cm in diameter. Furfural enters from the upper part of the extraction tower as the solvent, and the third-line distillate oil enters from the lower part of the tower. The furfural / oil mass ratio is 2.5:1. The temperature is 70°C, the temperature of the lower part is 60°C, the mass ratio of the feed oil extracted from the lower part of the secondary extraction tower to the third-line fraction oil is 0.6:1, and the mass ratio of fresh furfural to the extracted oil in the upper part of the secondary extraction tower is 0.5:1. After 12 hours, the secondary refined oil was obtained, the yield accounted for 32wt% of the third-line distillate oil, its PCA content was 1.3%, the benzopyrene content was 0.3ppm, and 8 kinds of carcinogen content 7ppm, C A The content is ...

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Abstract

The invention relates to a method for refining vacuum gas oil, which can be used for producing environment-friendly rubber extending oil with a high content of aromatic hydrocarbon and a low content of polyaromatic hydrocarbon. The method is characterized in that furfural, N-methyl pyrrolidone, phenol and dimethyl sulfoxide are used as solvent for extraction in an extraction tower, the solvent is fed in from the upper part of the extraction tower, vacuum distillate is fed in from the lower part of the extraction tower, the solvent and the vacuum distillate are in countercurrent contact, then refined solution flows out of the top of the extraction tower, and refined oil can be obtained after solvent recovery through evaporation and stripping; and primary extract solution on the tower bottom is fed into the middle upper part of a secondary extraction tower, extract oil is fed into the lower part of the secondary extraction tower, fresh solvent is fed into the upper part of the secondary extraction tower, then secondary refined solution flows out of the top of the secondary extraction tower, secondary refined oil can be obtained after solvent recovery through evaporation and stripping and can be used as the environment-friendly rubber extending oil with a high content of aromatic hydrocarbon, secondary extract solution flows out of the bottom of the secondary extraction tower, extract oil can be obtained after solvent recovery through evaporation and stripping, part of the extract oil returns to the lower part of the secondary extraction tower, and the rest of the extract oil is thrown out as the product.

Description

technical field [0001] The invention belongs to the field of petroleum and petroleum fraction refining, and relates to a method for producing and refining special oil products in the petroleum processing process. The International Patent Classification belongs to C10G 21 / 00. Background technique [0002] Rubber is a high polymer with high elasticity, toughness and considerable strength. It is widely used in modern society. Whether it is automobiles, aviation, navigation and other transportation industries, or construction, cutting-edge technology, medicine and health, daily life, etc., rubber is inseparable. Therefore, rubber has played an inestimable role in promoting the development of the national economy and improving people's living standards. Add a certain amount of rubber filling oil (referred to as rubber oil) to the rubber material, and the rubber products produced are soft and have good elasticity. [0003] Rubber extender oil is one of the important raw material...

Claims

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Application Information

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IPC IPC(8): C10G53/04C10M177/00C08L21/00C08K5/01
Inventor 王延臻段红玲宋春敏董艳丽王鹏成钟读乐徐学飞张学雷孙露霞李倩高丽蒋淑娇张亚楠
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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