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A kind of production method of environment-friendly rubber oil

A technology for environmental protection rubber oil and production method, applied in the direction of refining with two or more solvents, etc., can solve the problems of low yield of environmental protection rubber oil, difficulty in production, difficulty in continuing to increase the aromatic carbon rate and the like

Active Publication Date: 2021-12-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 problem is that it is difficult to produce products with high yield, high aromatic content and quality that can meet the requirements of the European Union by simply using traditional solvent extraction technology.
However, this method still has problems such as low yield of environmentally friendly rubber oil and difficulty in increasing the aromatic carbon rate.
Patent 201710703433.7 and patent 201710703434.1 propose a method that uses N-methylpyrrolidone (NMP), phenol, furfural, dimethyl sulfoxide and other solvents as A solvent, C5-C18 alkanes as B solvent, and the raw material oil is 350-600 °C The oil is extracted and extracted in the extraction tower, wherein solvent A does not enter from the tower, solvent B enters from the lower part of the extraction tower, and the raw material oil enters from the middle and lower part of the extraction tower, and the obtained tower top component is obtained after recycling the solvent. Environmentally friendly rubber filler oil, the yield of the environmentally friendly rubber filler oil obtained by this patent is very high, and the aromatic carbon rate is also very high, reaching more than 23%, but the eight aromatic hydrocarbons in the patent application are still relatively high, although it can meet the eight aromatic hydrocarbons less than 10% cases, but some cases lead to failure of the eight aromatics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Adopt the raw material oil and extracting column identical with comparative example. A solvent is N-methylpyrrolidone (NMP for short), and B solvent is water. A: Raw oil: B=1.5:1:0.4 (weight). A solvent (70°C) enters from the upper feed port of the extraction tower, raw oil (55°C) enters from the middle and lower feed port of the extraction tower, and B solvent (50°C) enters from the lower feed port of the extraction tower. The temperature of the precipitation section is 50-55°C from bottom to top, and the temperature of the extraction section is 55-70°C from bottom to top. The refined liquid is obtained from the top of the tower, and the extract is obtained from the bottom of the tower. The refined liquid is evaporated to recover the solvent to obtain the refined oil as environmentally friendly rubber oil, the yield is 66.2%, the content of benzo[a]pyrene is 0 μg / g, the total content of 8 kinds of carcinogens is 0 μg / g, and the aromatic carbon rate is C A It is 26.0%...

Embodiment 2

[0043] Using the same extraction tower and feed oil as in Example 1, solvent A is respectively furfural, phenol, dimethyl sulfoxide, sulfolane, N-formyl morpholine, solvent B is water, and solvent A (70° C.) is extracted from The upper feed port of the extraction tower enters, the raw material oil (55°C) enters from the middle and lower feed port of the extraction tower, and the B solvent (50°C) enters from the lower feed port of the extraction tower. A: Raw oil: B=2.5:1:0.3 (weight), the temperature of the precipitation section is 50-60°C from bottom to top, and the temperature of the extraction section is 60-75°C from bottom to top. Get the extract at the bottom. The refined oil obtained by recovering the solvent from the refined liquid is environmentally friendly rubber oil. The refined oil accounts for the yield of raw oil, the content of benzo[a]pyrene, the content of 8 carcinogens, and the aromatic carbon rate C A They are listed in Table 4 respectively.

[0044] Table...

Embodiment 3

[0048] Using the same extraction tower and raw oil as in Example 1, the flow process is as shown in the accompanying drawings. A solvent is furfural, NMP, phenol, dimethyl sulfoxide, sulfolane, N-formyl morpholine respectively, and B solvent is ethanol. A: Raw oil: B=2.5:1:1 (weight), the temperature of the precipitation section is 60-70°C from bottom to top, and the temperature of the extraction section is 70-90°C from bottom to top. Get the extract at the bottom. The refined oil obtained by recovering the solvent from the refined liquid is environmentally friendly rubber oil. The refined oil accounts for the yield of raw oil, the content of benzo[a]pyrene, the content of 8 carcinogens, and the aromatic carbon rate C A They are listed in Table 5 respectively.

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Abstract

A production method of environmentally friendly rubber oil belongs to the field of petroleum and petroleum distillate refining. It is characterized in that the method for extraction by solvent, the solvent used is A and B, and the A solvent includes furfural, phenol, N-methylpyrrolidone, dimethyl sulfoxide, sulfolane, and N-formyl morpholine. One or more, the B-type solvent is one or more of water, methanol, ethanol, and isopropanol, and the raw oil is the extracted oil produced by the extraction of the wax oil in the range of 350-600 ℃ with a polar solvent. , the extraction process is carried out in the extraction tower; the type A solvent enters from the upper inlet of the extraction tower, the raw material oil enters from the inlet in the middle of the extraction tower, and the type B solvent enters from the lower inlet of the extraction tower; Refined liquid flows out from the top of the stripping tower, and the refined oil is obtained by recovering the solvent. Adjust the oil ratio and temperature of the two agents to make the content of polycyclic aromatic hydrocarbons in the refined oil meet the environmental protection requirements, then the refined oil is high-aromatic environmental protection rubber oil; The bottom outflow is the extraction liquid, and the secondary extraction oil is obtained by recovering the solvent.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C10G21/04
Inventor 王延臻宋春敏王充段红玲张安
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)