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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 problems such as not being raised, and achieve good selectivity.

Active Publication Date: 2014-12-31
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 extraction process does not propose any differences from conventional solvent extraction.

Method used

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  • Preparation method of aromatic rubber oil
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preparation example Construction

[0009] A method for preparing aromatic rubber oil, comprising: the first extraction solvent enters the upper part of the first extraction tower, contacts with the raw material oil entering from the lower part of the extraction tower in countercurrent in the extraction tower, and the raffinate is passed through the first extraction tower. After the liquid solvent recovery system recovers the solvent, the first raffinate is obtained, and the extracted liquid enters the lower part of the second extraction tower as the raw material of the second extraction tower after recovering part of the solvent through the first extraction liquid solvent recovery system, and is extracted from the second extraction tower. The second extraction solvent entering the upper part of the extraction tower is contacted in countercurrent; the second extraction tower top raffinate is recovered by the solvent to obtain the second raffinate oil, which is used as a rubber oil product. After the second extract...

Embodiment 1

[0038] Using naphthenic alkyl minus second-line distillate oil as raw material, its properties are shown in Table 1. Aromatics are extracted in a packed extraction tower (tower size Φ25×2500×2.5) with three theoretical extraction stages. The solvent in the first extraction tower The total feed flow rate of feed oil and crude oil is 1200 g / h.

[0039] The extraction conditions are: the temperature at the top of the first extraction tower 1 is 80°C, the temperature at the bottom of the first extraction tower 1 is 60°C, the first extraction tower uses furfural from the furfural drying tower 7, and the first extraction solvent The mass ratio to raw oil is 1.5:1, and the first raffinate is obtained after solvent recovery of the tower top raffinate, and part of the solvent is recovered from the tower bottom extraction liquid through the two evaporation towers of the first extraction liquid solvent recovery system according to the flow chart in the attached drawing (in the material a...

Embodiment 2

[0041] Using the dewaxed oil of paraffin base minus four-line distillate oil as raw material, its properties are shown in Table 1. The aromatics were extracted in a packed extraction tower (tower size Φ25×2500×2.5) with three theoretical extraction stages. The total feed flow of solvent and feed oil to the stripper was 1200 g / h.

[0042] The extraction conditions are: the temperature at the top of the first extraction tower 1 is 110°C, the temperature at the bottom of the first extraction tower 1 is 90°C, the first extraction tower uses furfural from the furfural drying tower 7, and the first extraction solvent The mass ratio to raw oil is 3.2:1. The first raffinate is obtained after solvent recovery of the tower top raffinate. According to the flow chart in the attached figure, the bottom extraction liquid passes through the two evaporation towers of the first extraction liquid solvent recovery system to recover part of the solvent. (in the material after recovering part of t...

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Abstract

The invention relates to a preparation method of aromatic rubber oil. The preparation method comprises the following steps that: a first extraction solvent enters the upper part of a first extraction tower to be in countercurrent contact with raw oil entering from the lower part of the extraction tower in the extraction tower, partial solvent is recovered by a first extract solvent recovery system from the extract, then the extract enters the lower part of a second extraction tower to be taken as a raw material of the second extraction tower and is in countercurrent contact with a second extraction solvent entering from the upper part of the second extraction tower, and raffinate on the top of the second extraction tower is recovered by the solvent to obtain second raffinate which is used as a rubber oil product. In the preparation method, wet furfural from an aldehyde-water separation tank is used as part of extraction solvent to reduce the recovery processing capacity of the wet furfural, the content of benzo (a) pyrene, as well as the total content of eight polycyclic aromatic hydrocarbons (PAHs) such as benzo (a) anthracene, benzo (b) fluoranthene, benzo (k) fluoranthene, benzo (j) fluoranthene, benzo (a) pyrene, benzo (e) pyrene and dibenzo (a, h) anthracene in the obtained aromatic rubber oil meet the requirements of EU 2005 / 69 / EC instructions, and the mass of polycyclic aromatic hydrocarbon contained in the aromatic rubber oil 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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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/04C08L21/00C08K5/01
Inventor 王玉章管翠诗丁洛
Owner CHINA PETROLEUM & CHEM CORP