Combination process of residual oil hydrotreating and bright oil production

A combined process and residual oil hydrogenation technology, which is applied in the direction of hydrotreating process, hydrocarbon oil treatment products, hydrocarbon oil treatment, etc., can solve the problems of lower base oil yield, viscosity loss, restriction, etc., and achieve improved color and oxidation Stability, lower pour point, color improvement effect

Active Publication Date: 2021-11-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Viscosity loss occurs when this method produces bright stock, which reduces the yield of base oil and limits the application of this method to produce bright stock

Method used

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  • Combination process of residual oil hydrotreating and bright oil production
  • Combination process of residual oil hydrotreating and bright oil production
  • Combination process of residual oil hydrotreating and bright oil production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] This example is used to illustrate the hydrogenation of residual oil and bright stock production method provided by the present invention.

[0094] Using the same raw materials and conditions as Comparative Example 1 to carry out residual oil hydrogenation and produce bright oil, the difference is that according to figure 1 The process of solvent deasphalting-solvent dewaxing-solvent refining-clay supplementary refining process is used to produce lubricating oil base oil, the mass ratio of solvent refining oil to oil is 5.5:1, the solvent dewaxing temperature is -24°C, and the pumping out of the solvent refining unit The oil is recycled back to the residual oil hydrogenation unit for use as co-solvent. The mass ratio of co-solvent to residual oil is 0.05:1, and the mass fraction of aromatic colloids in co-solvent is 67.4%.

[0095] At the initial stage of the test, pure residual oil was used for residual oil hydrogenation test, and the extracted oil was recycled to the...

Embodiment 2

[0113] This example is used to illustrate the hydrogenation of residual oil and bright stock production method provided by the present invention.

[0114] Using the same raw materials and conditions as Comparative Example 4 to carry out residual oil hydrogenation and produce bright oil, the difference is that according to figure 1 The process of solvent deasphalting-solvent dewaxing-solvent refining-clay supplementary refining process is used to produce lubricating oil base oil, the mass ratio of solvent refining oil to oil is 4.5:1, the temperature of solvent dewaxing is -27℃, and the extraction of solvent refining unit The oil is recycled back to the residual oil hydrogenation unit for use as co-solvent. The mass ratio of co-solvent to residual oil is 0.06:1, and the mass fraction of aromatic colloids in co-solvent is 84.8%.

[0115] At the initial stage of the test, pure residual oil was used for residual oil hydrogenation test, and the extracted oil was recycled to the re...

Embodiment 3

[0133] This example is used to illustrate the hydrogenation of residual oil and bright stock production method provided by the present invention.

[0134] Using the same raw materials and conditions as Comparative Example 7 to carry out residual oil hydrogenation and produce bright oil, the difference is that according to figure 1 The process of solvent deasphalting-solvent dewaxing-solvent refining-clay supplementary refining process is used to produce lubricating oil base oil, the mass ratio of solvent refining to oil is 2.5:1, the temperature of solvent dewaxing is -28℃, and the extraction of solvent refining unit The oil is recycled back to the residual oil hydrogenation unit for use as co-solvent. The mass ratio of co-solvent to residual oil is 0.03:1, and the mass fraction of aromatic colloids in co-solvent is 76.2%.

[0135]At the initial stage of the test, pure residual oil was used for residual oil hydrogenation test, and the extracted oil was recycled to the residua...

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Abstract

The invention relates to the field of petrochemical industry, and discloses a combination process of residual oil hydrogenation treatment and bright oil production, the process includes: contacting hydrogen, residual oil raw materials and co-solvent with a catalyst, and regenerating the separated hydrogenated residual oil tail oil Separation into vacuum wax oil and vacuum residue; use deasphalting solvent to solvent extract the vacuum residue to obtain extract and raffinate and remove the solvent to obtain deasphalted oil and deoiled asphalt; use dewaxing solvent to extract Solvent dewaxing the deasphalted oil to obtain dewaxed filtrate and wax paste and remove the solvent to obtain dewaxed oil and oily wax; use extraction solvent to solvent refine the dewaxed oil to obtain raffinate and extract and remove the solvent Refined oil and extracted oil are obtained; the refined oil is adsorbed and refined with an adsorbent, and bright oil is separated to obtain bright oil, and the co-solvent is solvent refined extracted oil. The method of the invention can reduce the coking amount of the catalyst, prolong the operation cycle of the device, and simultaneously produce bright stock meeting the lubricating oil base oil standard.

Description

technical field [0001] The present invention relates to the combined process of residual oil hydrotreating process and its vacuum residue product through lubricating oil base oil production process, in particular, to a kind of residual oil hydrotreating and high-viscosity lubricating oil base oil (bright stock) Combination process of production. Background technique [0002] As the quality of crude oil processed by my country's oil refining enterprises becomes inferior and heavy, the amount of residual oil continues to increase. Residual oil generally refers to crude oil distillation and separation of gasoline, kerosene and diesel fractions, and then vacuum distillation to separate vacuum wax oil fractions. Residual oil with a boiling point above 520°C has the characteristics of high boiling point and high impurity content. The most difficult raw material to process in the refining process. [0003] One method of traditional residual oil processing is thermal processing, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/14
CPCC10G67/14C10G2300/206C10G2400/10
Inventor 丁洛管翠诗王玉章蔡晨彭东岳陈国成
Owner CHINA PETROLEUM & CHEM CORP
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