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A method for reducing water content of base oil

A technology for base oil and refined oil, which is applied in the fields of dehydration/demulsification of hydrocarbon oil, petroleum industry, and only multi-stage serial refining process, etc. It can solve the problems of base oil emulsification and turbidity, lubricating oil product turbidity, etc.

Active Publication Date: 2021-09-24
PANJIN NORTHERN ASPHALT FUEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the water content of the base oil is high, about 300ppm or more, and the high water content of the base oil will cause the blended lubricating oil product to be turbid. In severe cases, the base oil will be emulsified and turbid.

Method used

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  • A method for reducing water content of base oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see figure 1 , a method for reducing the water content of base oil, which comprises the following processes:

[0035] (1) the decompression side draw lubricating oil (residual lubricating oil produced by propane deasphalting unit) that is fractionated by the atmospheric and vacuum unit as raw material is put into furfural refining unit 10, after furfural solvent extraction, produce refined oil and The oil is extracted, the refined oil of which enters the intermediate tank 51. The extracted oil is sold as bitumen regenerant for hot mix; or as raw material for catalytic cracking unit.

[0036] (2) The refined oil enters the first buffer tank 21 of the ketone-benzene dewaxing and deoiling device 20 from the intermediate tank 51, and then the refined oil is dewaxed and deoiled through crystallization and filtration successively to form dewaxed oil liquid, deoiled oil Waxes and underwaxes. The dewaxed oil, deoiled wax and sub-wax oil respectively enter the recovery system...

Embodiment 2

[0044] This embodiment is basically the same as Embodiment 1, and its difference is:

[0045] Different heaters are used to heat the nitrogen, the temperature of nitrogen entering the clay degassing tower is 90°C, and the temperature of nitrogen entering the clay evaporation tower is 110°C. The bottom temperature of the clay degassing tower is controlled at 95°C. The bottom temperature of the clay evaporation tower is controlled at 180°C.

[0046] In this embodiment, the residence time of the refined oil in the intermediate tank is 26 hours, and the temperature is 70°C. Periodically drain the tundish through the tundish drain valve at the bottom. The residence time of the refined oil in the first buffer tank is 1.1 hours, the temperature is 79° C., and the first buffer tank is regularly drained through the first drain valve. The residence time of the base oil in the second buffer tank is 1.5 hours, the temperature is 70°C, and the second buffer tank is drained regularly thr...

Embodiment 3

[0049] This embodiment is basically the same as Embodiment 1, and its difference is:

[0050] Different heaters are used to heat the nitrogen, the temperature of nitrogen entering the clay degassing tower is 110°C, and the temperature of nitrogen entering the clay evaporation tower is 100°C. The bottom temperature of the clay degassing tower is controlled at 100°C. The bottom temperature of the clay evaporation tower is controlled at 187°C.

[0051] In this embodiment, the residence time of the refined oil in the intermediate tank is 34 hours, and the temperature is 80°C. Periodically drain the tundish through the tundish drain valve at the bottom. The residence time of the refined oil in the first buffer tank is 0.9 hours, the temperature is 81°C, and the first buffer tank is regularly drained through the first drain valve. The residence time of the base oil in the second buffer tank is 1.2 hours, the temperature is 71°C, and the second buffer tank is drained regularly thr...

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Abstract

The invention discloses a method for reducing the water content of base oil, which includes the following process: (1) raw materials enter a furfural refining device, and after being extracted with a furfural solvent, refined oil and extracted oil are produced, and the refined oil enters a middle tank; (2) The refined oil enters the ketone-benzene dewaxing and deoiling unit from the intermediate tank, and after crystallization, filtration and solvent recovery, dewaxed oil, deoiled wax and waxed oil are obtained; (3) The dewaxed oil enters the clay for supplementation In the refining unit, the base oil is obtained after denitrification, clay adsorption and filtration, and the base oil enters the finished product tank after passing through the product tank; the intermediate tank is drained regularly. After the intermediate tank is added, the refined oil will stay for a certain period of time before it enters the ketone-benzene dewaxing and deoiling unit. During the stay, the water remaining in the refined oil will gradually separate and gather at the bottom of the tank. Regularly drain the water at the bottom of the tank to reduce the water entering the ketone-benzene dewaxing and deoiling unit, so that the water in the base oil can be effectively reduced.

Description

technical field [0001] In particular, the present invention relates to a method for reducing the water content of base oils. Background technique [0002] The vacuum side draw lubricating oil raw material distilled from the atmospheric and vacuum unit and the residual lubricating oil (bright oil) produced by the propane deasphalting unit will contain some non-ideal substances that are harmful to the performance of the oil. The existence of these substances will make The viscosity index of the oil decreases, the anti-oxidation stability deteriorates, and more precipitation and acidic substances are easily generated after oxidation during use. In order to remove the non-ideal components in the lubricating oil, the refining engineer designed a furfural refining device. The refined oil produced by furfural refining has poor low-temperature fluidity. In order to ensure the low-temperature fluidity of lubricating oil, refining engineers designed a ketone-benzene deoiling and dewax...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/08C10G33/00
CPCC10G33/00C10G53/08
Inventor 郭保坤姜菲菲高金跃吴国庆夏浩原王博研范润辉
Owner PANJIN NORTHERN ASPHALT FUEL