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Preparation method of aromatic rubber oil

A technology for aromatic rubber oil and raw material oil, which is applied in the direction of multi-stage series refining process treatment, etc., can solve the problem of high total content and achieve the effect of meeting environmental protection requirements.

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome in the prior art, the aromatic hydrocarbon rubber oil benzo (a) pyrene content of preparation and benzo (a) anthracene, Benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(j)fluoranthene, benzo(a)pyrene, benzo(e)pyrene and dibenzo(a,h)anthracene The defect that the total content of fused ring aromatic hydrocarbons (PAHs) is too high provides a method for preparing benzo (a) pyrene content and benzo (a) anthracene, Benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(j)fluoranthene, benzo(a)pyrene, benzo(e)pyrene and dibenzo(a,h)anthracene A method for the aromatic rubber oil whose total content of polycyclic aromatic hydrocarbons (PAHs) meets environmental protection requirements

Method used

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preparation example Construction

[0008] According to the preparation method of the aromatic rubber oil provided by the present invention, the method comprises that the raw material oil and the first extraction solvent are fully contacted in the first extraction tower, and the raffinate of the first extraction tower is mixed with the second extraction solvent Fully contact in the second extraction tower, separate the extraction oil from the extract liquid of the second extraction tower; the first extraction solvent contains a main solvent and an anti-solvent, and the solubility of the main solvent to aromatics is greater than that to The solubility of alkanes, the anti-solvent can improve the selectivity of the first extraction solvent to condensed ring aromatics; the second extraction solvent contains the same solvent as the main solvent.

[0009] Preferably, the second extraction solvent is the same as the main solvent.

[0010] Preferably, the anti-solvent is selected from one or more of water, methanol, et...

Embodiment 1

[0033] The second-line distillate oil is used as the raw material, and its properties are shown in Table 1. Aromatics are extracted in parallel double towers (packed towers, the theoretical number of extraction stages is three, tower model Φ60×2400×4), the solvent and raw materials of the first extraction tower The total feed flow of oil was 4000 g / h.

[0034]Raw oil enters the first extraction tower 1 through the pipeline 4, and the upper effluent of the first extraction tower 1 enters the second extraction tower 2 through the pipeline 6, which is the raw material of the second extraction tower 2; the main solvent passes through the pipeline 3 and The antisolvent from pipeline 10 is mixed into the first extraction solvent and enters the first extraction tower 1, and the second extraction solvent enters the second extraction tower 2 through the pipeline 7; the first extraction tower 1 and the second extraction tower 2 The lower part of the effluent is transported to the first ...

Embodiment 2

[0036] Aromatic rubber oil was prepared according to the same method as in Example 1, except that the dewaxed oil minus the third-line distillate was used as the raw material, and its properties are shown in Table 1. The extraction conditions are as follows: the temperature at the top of the first extraction tower 1 is 100°C, the temperature at the bottom of the first extraction tower 1 is 80°C, and the first extraction solvent is a mixed solvent of furfural and ethylene glycol, wherein the first The mass percent of extraction solvent containing ethylene glycol is 3%, and the mass ratio of the first extraction solvent and raw oil is 1.5: 1; The bottom temperature is 85°C, the second extraction solvent is furfural, and the mass ratio of the second extraction solvent to raw oil is 2.5:1.

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Abstract

The invention relates to a preparation method of aromatic rubber oil, comprising the following steps of: fully contacting raw oil with a first extraction solvent in a first extraction tower; fully contacting the extracted residual liquid in the first extraction tower with a second extraction solvent in a second extraction tower; and separating extract oil from extract liquid of the second extraction tower, wherein the first extraction solvent contains a main solvent and a counter solvent, the dissolubility of the main solvent on aromatic hydrocarbon is greater than that of the main solvent onalkane, the counter solvent can improve the selectivity of the first extraction solvent on nuclei aromatics, and the second extraction solvent contains a solvent same as the main solvent. According to the aromatic rubber oil prepared by the method disclosed by the invention, the content of benzo (a) pyrene is low, the total content of eight special polycyclic aromatic hydrocarbons (PAHs) including benzo (a) fluoranthene, chrysene, benzo (b) fluoranthene, benzo (k) fluoranthene, benzo (j) fluoranthene, benzo (a) pyrene, benzo (e) pyrene and dibenzo (a, h) anthracene is low and the environmentally-friendly environment can be met.

Description

technical field [0001] The invention relates to a preparation method of aromatic rubber oil. Background technique [0002] Aromatic rubber oil (DAE) is one of the main raw materials in the process of producing rubber and tires, and usually contains 10-25% polycyclic aromatic hydrocarbons (PCA). Among them, polycyclic aromatic hydrocarbons (PCA) refer to polycyclic aromatic hydrocarbons with three or more rings. At present, with the increasingly stringent environmental protection regulations, PCA has become a world-recognized organic pollutant. As early as 1994, the EU chemical classification and labeling agency classified DAE with a mass content of PCA greater than 3% as toxic substances. In 2005, the European Union signed Directive 2005 / 69 / EC, which clearly limits the content of eight carcinogenic fused-ring aromatic hydrocarbons in DAE: the content of benzo(a)pyrene is not more than 1mg / kg, benzo(a)anthracene, Benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(j)fluoran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/06C08K5/01
Inventor 管翠诗王玉章丁洛杨文中
Owner CHINA PETROLEUM & CHEM CORP