Recovery method of medium oil in spent bleaching clay and preparation method of base oil for lubricating oil

A technology of lubricating base oil and recovery method, which is applied in the field of clay supplementing and refining waste clay, can solve the problems of high construction and use costs, and achieve the effects of improving the yield of extracted oil and the yield of base oil.

Active Publication Date: 2017-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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Problems solved by technology

However, in order to obtain the oil dissolved in the solvent, it is necessary to build a separate recovery device ...

Method used

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  • Recovery method of medium oil in spent bleaching clay and preparation method of base oil for lubricating oil

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preparation example Construction

[0062] The present invention also provides a method for preparing lubricating base oil, wherein the preparation method comprises: contacting the raw material oil with an extraction solvent for solvent refining to obtain a refined liquid and an extracted liquid, and performing solvent recovery to obtain refined oil, Extract oil, recover solvent and water, contact refined oil with dewaxing dilution solvent for solvent dewaxing to obtain dewaxed oil and oily wax, contact dewaxed oil with clay for supplementary refining of clay to obtain lubricating oil base oil and waste clay , the waste clay contains lubricating oil base oil and non-ideal components, and the preparation method also includes:

[0063]Under the first contact condition, the waste clay to be treated is contacted with an organic solvent to desorb the lubricating oil base oil in the waste clay and separate the solid and liquid to obtain a mixture containing a lubricating oil base oil and an organic solvent and the firs...

Embodiment 1

[0093] This embodiment is used to illustrate the method for recovering oil from waste clay provided by the present invention.

[0094] Using the same raw materials, process flow and conditions as Comparative Example 1 to produce lubricating oil base oil, the difference is that according to figure 1 The process is to recover the oil in the waste clay obtained by supplementing and refining the clay.

[0095] The first experiment used the white clay obtained in Comparative Example 1 to refine the waste white clay, and the second experiment used the waste white clay obtained in the first experiment. Repeat the experiment many times. When the results of two consecutive experiments are the same, take the result of the last experiment , see Table 2 for details.

[0096] The formula for calculating the comprehensive yield of base oil in the table is:

[0097]Comprehensive base oil yield = (solvent refined oil yield / 100) x (dewaxed oil yield / 100) x (clay refined oil yield / 100) x 100....

Embodiment 2

[0110] This embodiment is used to illustrate the method for recovering oil from waste clay provided by the present invention.

[0111] Using the same raw materials, process and conditions as Comparative Example 2 to produce lubricating oil base oil, the difference is that according to figure 1 The process is to recover the oil in the waste clay obtained by supplementing and refining the clay. The first experiment used the white clay obtained in Comparative Example 2 to refine the waste white clay, and the second experiment used the waste white clay obtained in the first experiment. Repeat the experiment many times. When the results of two consecutive experiments are the same, take the result of the last experiment , see Table 2 for details.

[0112] The specific steps are as follows: step a, add organic solvent furfural to the waste clay, the mass ratio of furfural to waste clay is 4.3:1, the mixing temperature is 45°C, the mixing time is 15min, the mixture is settled at 45°C...

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Abstract

The invention relates to the field of a petrochemical industry and discloses a recovery method of medium oil in spent bleaching clay and a preparation method of base oil for lubricating oil. The recovery method comprises the following steps: contacting the spent bleaching clay with an organic solvent under a first contact condition, so as to desorb base oil for the lubricating oil in the spent bleaching clay; contacting the first-treated spent bleaching clay with an organic solven under a second contact condition, so as to dissolve non-ideal components in the spent bleaching clay; contacting the second-treated spent bleaching clay with water under a third contact condition, so as to dissolve the organic solvent in the spent bleaching clay, wherein both the organic solvents used in the first contact and the second contact are from extraction solvents for solvent refining of raw oil; returning an oil-contained solvent mixture which is obtained by first contact separation, and using as one part of the extraction solvents for solvent refining; returning oil-contained solution which is obtained by second contact separation, and using as one part of the raw oil. According to the method, the base oil for the lubricating oil in the spent bleaching clay can be effectively recovered.

Description

technical field [0001] The invention relates to a treatment method for supplementing and refining waste clay in the production process of lubricating oil base oil, in particular to a method for recovering oil from waste clay and a method for preparing lubricating oil base oil. Background technique [0002] In order to improve the properties of lubricating base oils such as color, oxidation stability and viscosity-temperature performance, it is necessary to remove the non-ideal components in the production raw materials of lubricating base oils, and keep the ideal components with light color, good oxidation stability and viscosity-temperature performance. components. The ideal components are mainly isoparaffins, naphthenes and aromatics with few rings and long side chains, and the non-ideal components are mainly polycyclic short side chain aromatics and heteroatom compounds. At present, methods such as solvent refining and hydrotreating are mainly used to improve the propert...

Claims

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Application Information

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IPC IPC(8): C10G21/12C10G21/28C10M177/00
CPCC10G21/12C10G21/28C10G2300/1003C10G2400/10C10M177/00
Inventor 丁洛王玉章管翠诗蔡晨陈国成
Owner CHINA PETROLEUM & CHEM CORP
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