Preparation method for distillate aromatic extract (DAE)

A technology for aromatic rubber oil and raw oil, applied in the direction of refined hydrocarbon oil, petroleum industry, etc., can solve the problems that have not been raised, and achieve the effects of good selectivity, high extraction efficiency and high yield

Active Publication Date: 2011-10-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both extractions in this patent use pure furfural as a solvent, and the solvent extr

Method used

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  • Preparation method for distillate aromatic extract (DAE)
  • Preparation method for distillate aromatic extract (DAE)
  • Preparation method for distillate aromatic extract (DAE)

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preparation example Construction

[0009] A preparation method of aromatic hydrocarbon rubber oil, comprising: after raw material oil is mixed with a diluent solvent, enters an extraction tower, contacts with the extraction solvent in the extraction tower, and separates the raffinate oil from the raffinate; the raw material oil Solvent refined extract oil and / or dewaxed oil of solvent refined extract oil, the dilution solvent contains a main solvent, the extraction solvent contains a main solvent and an anti-solvent, and the solubility of the main solvent to aromatics is greater than that to alkanes Solubility.

[0010] The solvent-refined extracted oil refers to the extracted oil obtained by the solvent-refined process. The solvent-refined extracted oil includes one or more of the extracted oils obtained from the following crude oil fractions through solvent refining process: second-line distillate oil, third-line distillate oil, fourth-line distillate oil, fifth-line distillate oil and solvent Deasphalted oi...

Embodiment 1

[0035] The solvent-refined oil extracted from naphthenic crude oil minus the second-line distillate oil is used as raw material, and its properties are shown in Table 1. Extraction is carried out in a packed extraction tower (tower size Φ42×4000×3.5) with three theoretical extraction stages. The total feed flow of solvent and raw oil to the extraction column is 4200 g / h.

[0036] Carry out solvent extraction according to accompanying drawing 1 flow process, prepare aromatic hydrocarbon rubber oil. The extraction conditions are: the temperature at the top of the extraction tower is 55°C, the temperature at the bottom of the tower is 45°C, the mass ratio of the dilution solvent to the raw oil is 0.2:1, after being mixed by the mixer 3, it enters the bottom of the extraction tower, and is mixed with the The extraction solvent entering the upper part of the extraction tower is in countercurrent contact, and the mass ratio of the extraction solvent entering the upper part of the ex...

Embodiment 2

[0038] Solvent extraction was carried out on the same extraction device as in Example 1 to prepare aromatic rubber oil, and the extracted oil obtained by subtracting third-line distillate oil from intermediate base crude oil through solvent dewaxing and then solvent refining was used as raw material, and its properties are shown in Table 1.

[0039] Carry out solvent extraction according to accompanying drawing 1 flow process, prepare aromatic hydrocarbon rubber oil. The extraction conditions are: the temperature at the top of the extraction tower is 65°C, the temperature at the bottom of the tower is 50°C, the mass ratio of the dilution solvent to the raw oil is 0.1:1, after being mixed by the mixer 3, it enters the lower part of the extraction tower, and is mixed with the The extraction solvent entering the upper part of the extraction tower is in countercurrent contact, and the mass ratio of the extraction solvent entering the upper part of the extraction tower to the raw ma...

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Abstract

The invention relates to a preparation method for DAEs, comprising the following steps that: raw oil and a diluting solvent are mixed, the mixed solution enters into an extraction tower and contacts with an extraction solvent in the extraction tower, and raffinate oil is separated from raffinate, wherein the raw oil is extract oil obtained by solvent refining and/or de-waxing oil of the extract oil, the diluting solvent contains a main solvent, the extraction solvent contains the main solvent and an anti-solvent, and the main solvent has greater dissolvability of aromatic hydrocarbons than of alkane. According to the invention, the preparation method has high extraction efficiency; the extraction solvent used has good selectivity; DAE prepared by the method has high yield; the content of benzo(a)pyrene and the total content of 8 PAHs, namely, benzo(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(j)fluoranthene, benzo(a)pyrene, benzo(e)pyrene and dibenzo(a,h)anthracene, are low, which is in accordance with the European Union 2005/69/EC instruction; the content of polycyclicaromatics is less than 3%.

Description

technical field [0001] The invention relates to a preparation method of aromatic rubber oil. Background technique [0002] In order to improve the properties of rubber such as elasticity, flexibility, ease of processing and ease of mixing, it is usually necessary to add rubber oil to the rubber. According to the molecular structure and composition of mineral oil, rubber oil is divided into paraffin type, naphthene type and aromatic hydrocarbon type rubber oil, etc.; according to the different objects of use, it can be divided into rubber filling oil, rubber operating oil, rubber softener, etc. Aromatic rubber oil (Distillate Aromatic Extract, abbreviated as DAE) has the characteristics of high aromatic carbon content, high density, high viscosity, good affinity with polar rubber and excellent processing performance. It is an excellent rubber used in tires and footwear products. softener. In the production process of styrene-butadiene rubber, aromatic hydrocarbon rubber oil...

Claims

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Application Information

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IPC IPC(8): C10G21/20C10G21/16C08K5/01
Inventor 丁洛王玉章管翠诗
Owner CHINA PETROLEUM & CHEM CORP
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