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Control method and control device for moisture content of furfural in extraction of furfural and method for preparing aromatic rubber oil

A control method and technology of water content, which are applied in the fields of refined hydrocarbon oil, hydrocarbon oil refining control/regulation, and petroleum industry, etc., can solve the problems such as not raised, and achieve the improvement of selectivity, reduction of discharge, and reduction of water injection amount of extraction solvent Effect

Active Publication Date: 2012-07-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent uses furfural with a water content of <0.5% by mass as a solvent for both extractions, and the solvent extraction process does not propose a difference from conventional solvent extraction.

Method used

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  • Control method and control device for moisture content of furfural in extraction of furfural and method for preparing aromatic rubber oil
  • Control method and control device for moisture content of furfural in extraction of furfural and method for preparing aromatic rubber oil
  • Control method and control device for moisture content of furfural in extraction of furfural and method for preparing aromatic rubber oil

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specific Embodiment approach

[0032] A specific implementation of the control method is:

[0033] (1) choose a temperature between 5~90 DEG C, establish the correlation model of furfural water content-furfural refractive index under this temperature;

[0034] (2) Measure the flow rate of extracting furfural, draw a side line on the extraction furfural pipeline from the furfural drying tower, make the furfural temperature in the side line be the temperature of building a model by heat exchange, then measure the refractive index of furfural;

[0035] (3) calculate the water content of furfural with the model of step (1) gained and furfural refractive index;

[0036] (4) Calculate the water flow with the furfural flow obtained in step (2), the furfural water content obtained in step (3) and the furfural water content that needs to be achieved, and inject water into the extracted furfural with the calculated flow.

[0037] The present invention also provides a control device for realizing the above method, in...

Embodiment 1

[0058] This embodiment illustrates how to set up the correlation model of furfural water content-furfural refractive index

[0059] Prepare furfural with different water contents and measure the refractive index at 20°C and 35°C, see Table 1 for specific data.

[0060] According to the obtained data, the quadratic function was fitted using origin 5.0.

[0061] The correlation models of furfural water content-furfural refractive index at 20°C and 35°C were obtained respectively.

[0062] temperature

Embodiment 2

[0064] 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 2. Extraction is carried out in a packed extraction tower (tower size Φ42mm×4000mm) with three theoretical extraction stages. The total feed flow of solvent and raw oil to the tower is 4200g / h.

[0065] 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 furfural and raw oil used for mixing is 0.3:1, after being mixed by the mixer 3, it enters the lower part of the extraction tower , and countercurrent contact with the furfural entering the upper part of the extraction tower, and the mass ratio of the furfural entering the upper part of the extraction tower to the raw oil is 3.0:1. The f...

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Abstract

The invention relates to a control method and a control device for the moisture content of furfural in the extraction of the furfural and a method for preparing aromatic rubber oil. The method for preparing the aromatic rubber oil comprises the following steps of: mixing a part of furfural from a furfural drying tower with raw oil and enabling the mixture to enter the lower part of an extracting tower; mixing the other part of furfural from the furfural drying tower with water and enabling the mixture to enter the upper part of the extracting tower; carrying out counter-current contact on the two parts of materials in the extracting tower; and separating raffinate from overhead raffinate. By adopting the control method provided by the invention, the moisture content of the furfural entering the upper part of the extracting tower is controlled between more than 0.5 weight percent and 10 weight percent; and the raw oil is solvent refining extract oil or dewaxed oil of the solvent refining extract oil. The aromatic rubber oil prepared by adopting the method has high yield, the prepared aromatic rubber oil satisfies the directive requirements of European Union 2005 / 69 / EC, and the mass percent of polycyclic aromatic hydrocarbon is less than 3 percent.

Description

technical field [0001] The invention relates to a method for controlling the water content of furfural in furfural extraction, a control device and a method for preparing 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....

Claims

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Application Information

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IPC IPC(8): C10G21/16C10G21/30C08K5/01C08L21/00
Inventor 丁洛管翠诗王玉章王子军施昌智
Owner CHINA PETROLEUM & CHEM CORP
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