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Method for producing high-viscosity-index lubricant base oil by hydrocracking-isodewaxing combination

A technology for hydroisomerization dewaxing and lubricating base oil, which is applied in the field of heavy lubricating base oil and light production, can solve the problems of increasing energy consumption and operating cost, reducing reaction efficiency, increasing equipment investment, etc., and reducing construction costs. Investment and operation difficulty of the device, simple process flow, low operating cost and low investment effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, the hydrocracking products are not separated by distillation, and all lubricating oil components and light products enter the hydrodewaxing and supplementary refining units, which greatly reduces their reaction efficiency and increases energy consumption and operating costs.
Moreover, an adsorption unit must be added to achieve the purpose of producing lubricating oil in a process, which increases the equipment investment and makes the process more complicated

Method used

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  • Method for producing high-viscosity-index lubricant base oil by hydrocracking-isodewaxing combination

Examples

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Embodiment 1

[0049] This example introduces that the hydrocracking unit and the hydroisomerization dewaxing unit respectively use the catalysts in Table 2 to process the raw materials listed in Table 1. The hydrogen in the hydroisomerization dewaxing unit passes through once, and the tail hydrogen is used as supplementary hydrogen for hydrocracking. The reaction conditions and reaction results of the hydrocracking reaction zone and the hydroisomerization dewaxing unit are shown in Table 3. The vacuum fractionation column after the first hydroisomerization dewaxing reaction zone is provided with two side lines, which produce No. 4 base oil and No. 6 base oil respectively, and the bottom product of the tower produces No. 10 base oil. The split point of light lubricating oil base oil and heavy lubricating oil base oil is controlled at 480°C.

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Abstract

The invention discloses a method for producing high-viscosity-index lubricant base oil by hydrocracking-isodewaxing combination. The method is as follows: after hydrocracking technology processing of raw oil, hydrocracking tail oil enters into a first hydroisodewaxing reaction zone, reaction products are separated to obtain light lubricant base oil fractions and heavy base oil fractions; the heavy base oil fractions are partly discharged as products, and the rest part of the heavy base oil fractions enters a second hydroisodewaxing reaction zone, the high-viscosity-index heavy lubricant base oil with the pour point meeting the requirements is obtained by control of the isomerization reaction depth. Compared with the prior art, according to the method, new hydrogen passes through an isodewaxing unit in one time, tail hydrogen directly returns back to a hydrocracking unit to be used as supplement hydrogen, two units have only one hydrogen circulation system, device construction investment and operation cost are obviously reduced, light and heavy lubricant base oil with the quality meeting the requirements are obtained, the process is simple, and the operation energy consumption is low.

Description

technical field [0001] The invention relates to a production method of lubricating oil base oil, in particular to a method for producing light and heavy lubricating oil base oil by adopting a combination process of hydrocracking and isomerization dewaxing. Background technique [0002] The traditional production of lubricating base oils is based on the solvent process. The two main steps are solvent refining to remove non-ideal components such as aromatics and solvent dewaxing to ensure the low-temperature fluidity of the base oil. In addition, white clay or hydrogenation supplementary refining is generally carried out. [0003] Due to the deterioration of crude oil worldwide, the number of paraffinic crude oil suitable for the production of high viscosity index lubricating oil base oil by traditional technology is gradually decreasing. Therefore, the technology of producing lubricating oil by hydrogenation is developing very rapidly. Hydrogenation process refers to the pro...

Claims

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Application Information

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IPC IPC(8): C10G67/00C10M177/00
Inventor 赵威姚春雷全辉张志银孙国权林振发
Owner CHINA PETROLEUM & CHEM CORP
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