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Preparation method of aromatic rubber oil

A technology for aromatic rubber oil and oil extraction, which is only applied in the direction of multi-stage serial refining process, can solve the problems that have not been raised, and achieve the effect of good selectivity

Active Publication Date: 2011-11-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both extractions in this patent use pure furfural as a solvent, and the solvent extraction process does not propose any differences from conventional solvent extraction.

Method used

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  • Preparation method of aromatic rubber oil
  • Preparation method of aromatic rubber oil
  • Preparation method of aromatic rubber oil

Examples

Experimental program
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preparation example Construction

[0009] A method for preparing aromatic rubber oil, comprising: mixing dry furfural from the furfural drying tower of the furfural extraction solvent recovery system and wet furfural from the aldehyde-water separation tank of the furfural extraction solvent recovery system as the extraction solvent, and entering the extraction tower The upper part is in countercurrent contact with the raw material oil entering from the lower part of the extraction tower. After the raffinate is recovered from the solvent by the raffinate solvent recovery system, raffinate is obtained, and the extracted liquid is recovered by the solvent recovery system of the extraction liquid. , to obtain extracted oil; the raw material oil is solvent refined extracted oil and / or dewaxed oil of solvent refined extracted oil.

[0010] The dry furfural in the furfural drying tower of the furfural extraction solvent recovery system refers to the furfural obtained by azeotropic dehydration in the furfural drying tow...

Embodiment 1

[0027] 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.

[0028] 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 raw oil enters the lower part of the extraction tower, and contacts with the mixed extraction solvent of dry furfural and wet furfural from the upper part of the extraction tower, The ratio of dry furfural from the furfural drying tower to wet furfural from the aldehyde-water separation tank is 2.5:1, and the mass ratio of the extraction s...

Embodiment 2

[0030] Solvent extraction is carried out on the same extraction device as in Example 1 to prepare aromatic rubber oil, the extracted oil obtained by solvent refining from paraffin-based crude oil minus the fourth-line distillate oil, and the dewaxed extracted oil obtained by solvent dewaxing are used as raw materials , whose properties are shown in Table 1.

[0031] 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 80°C, the temperature at the bottom of the tower is 65°C, the raw oil enters the lower part of the extraction tower, and contacts with the mixed extraction solvent of dry furfural and wet furfural from the upper part of the extraction tower, The ratio of dry furfural from the furfural drying tower to wet furfural from the aldehyde-water separation tank is 1.5:1, and the mass ratio of the extraction solvent enterin...

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Abstract

The invention relates to a preparation method of aromatic rubber oil, which comprises the following steps of: mixing dry furfural from a furfural drying tower of a furfural extraction solvent recovery system and wet furfural from an aldehyde / water separating tank of the furfural extraction solvent recovery system to obtain a product serving as an extraction solvent; feeding the extraction solvent to the upper part of an extraction tower to be in counter current contact with raw oil entering from the lower part of the extraction tower; obtaining raffinate oil after the solvent in raffinate is recovered by a raffinate solvent recovery system; and obtaining extract oil after the solvent in extract is recovered by an extract solvent recovery system. The raw oil is solvent refining extract oil and / or dewaxed oil of the solvent refining extract oil. According to the method disclosed by the invention, the wet furfural is used as a part of extract solvent; the recovery processing load of the wet furfural is reduced; in the prepared aromatic rubber oil, the content of benzo[a]pyrene, and the total content of eight polycyclic aromatic hydrocarbon (PAHs) such as benzo[a]anthracene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[j]fluoranthene, benzo[a]pyrene, benzo[e]pyrene, dibenzo[a,h]anthracene and the like meet the 2005 / 69 / EC command requirement of the European Union; and the mass content of polycyclic aromatics 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): C10G53/04C08K5/01C08L21/00
Inventor 王玉章王子军管翠诗丁洛
Owner CHINA PETROLEUM & CHEM CORP