Production method of highly aromatic environmental-friendly rubber oil

Abstract

The invention provides a production method of highly aromatic environmental-friendly rubber oil, and belongs to the field of petroleum fraction refinement and petroleum. The production method is characterized in that a solvent extraction method is used, a solvent is one of furfural, N-methylpyrrolidone and phenol, a raw material is extract oil generated in a refinement process of lubricating oil with the distilling range of 350-600 DEG C, firstly the solvent is mixed with the extract oil at the temperature of 50-90 DEG C according to a certain mass ratio of solvent to oil, then a mixture of the solvent and the extract oil stands for a certain period of time so as to separate out two layers, upper seperation liquid is taken for solvent extraction, the mass ratio of solvent to oil is 0.3-2.0, the extraction temperature is 40-90 DEG C, raffinate obtained by extraction can serve as the environmental-friendly rubber oil after solvent recovery, displacing liquid is combined with a solvent phase solution obtained at the lower part of a separation tank, and secondary extract oil is obtained after solvent recovery and can be used as common rubber oil or used for other purpose.

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...

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 the same as the current lubricating oil refining method; the existing problem is that it is difficult to achieve the purpose of 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 extracted oil obtained at the bottom of the tower can be used As an ordinary rubber filling oil, but generally can not be used as an environmentally friendly rubber filling oil, because it contains a large amount of polycyclic aromatic hydrocarbons (PCA), more than 10%, so many researchers have proposed new refining or production methods

The application of patent application 200910088931.0 proposed a refining method, that is, the third-line raw material oil and furfural are contacted countercurrently in the extraction and extraction tower as mentioned above, and the solvent is recovered from the bottom of the tower to obtain the extracted oil, and then the extracted oil is subjected to secondary extraction. Extraction, the refined oil obtained by secondary extraction is environmentally friendly rubber oil, the yield of this process is very low, and it is more difficult to refine when the content of eight carcinogens in the extracted oil is high; the application of patent application 200910088932.5 proposes another refining method, which will The third-line raw material oil and furfural are contacted countercurrently in the extraction tower as mentioned above, and the refined oil is obtained after the solvent is recovered, and then the refined oil is subjected to secondary extraction, and the extracted oil obtained by the secondary extraction is environmentally friendly rubber oil. Patent applications have problems such as low yield of environmentally friendly oil, only 20-30%, low content of aromatic hydrocarbons in environmentally friendly oil, and difficulty in passing the eight carcinogens.