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Lubricating oil furfural refinement device provided with multi-stage extract recovery system and method

A furfural refining and recovery method technology, applied in the direction of lubricating compositions, etc., can solve the problems of energy consumption reduction of the recovery system and increase of energy consumption of the extraction liquid evaporation tower, and achieve low equipment investment costs, low energy consumption costs, and simple and practical processes Effect

Inactive Publication Date: 2016-07-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It must be pointed out that the method of Wang Guoliang et al. introduces light hydrocarbons, and the subsequent removal will increase some energy consumption, while the methods of Wang Yanzhen et al. method to produce liquid-liquid phase separation, and the circulation of the extracted oil leads to an increase in the energy consumption of the extracted liquid evaporation tower
Therefore, in the process of improving the yield of refined oil, the energy consumption of the recovery system has the potential to be further reduced

Method used

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  • Lubricating oil furfural refinement device provided with multi-stage extract recovery system and method
  • Lubricating oil furfural refinement device provided with multi-stage extract recovery system and method
  • Lubricating oil furfural refinement device provided with multi-stage extract recovery system and method

Examples

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Effect test

Embodiment 1

[0030] In this example, a single-tower extraction process is used to refine furfural in lubricating oil. The original process structure diagram is as follows figure 1 As shown, the process structure diagram after adding the two-stage recovery system is as follows figure 2shown. The lubricating oil is a minus-line spindle oil from a petrochemical company. Its mass average boiling point is about 360°C and its density at 20°C is 0.892g / mL. Its composition can be seen in Table 1. The flow rate of lubricating oil to be treated is 30t / h, and the equipment operating parameters and product regulations are listed in Table 1. In this example, after the lubricating oil material 2 is extracted by the extraction tower 3, the extracted liquid 4 at the bottom of the tower enters the primary cooler 6 to cool to 40°C, and then enters the primary liquid-liquid separator 7 for static phase separation, and the upper liquid phase 8 exits the primary liquid-liquid separator 7 and is heated to 80...

Embodiment 2

[0036] In this example, the double-tower solvent split extraction process is used to refine furfural in lubricating oil. The original process structure diagram is as follows image 3 As shown, the process structure diagram after adding the recovery system is as follows Figure 4 shown. Lubricating oil stock property is identical with the oil stock in embodiment 1. The flow rate of lubricating oil to be processed is 30t / h, and the equipment operating parameters, product regulations and accounting results are listed in Table 3. In this process, the flow ratio of furfural entering the first-stage extraction tower 3 and the second-stage extraction tower 4 is 3:1. After the lubricating oil material 2 is extracted by the extraction towers 3 and 4, the extracts 5 and 6 Mixed into the extracted liquid 9, enter the primary cooler 10 and cool to 40°C, enter the primary liquid-liquid separator 11 for static phase separation, and the upper liquid phase 12 is heated to 80°C by the heater...

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Abstract

The invention discloses a lubricating oil furfural refinement device provided with a multi-stage extract recovery system and a method. The lubricating oil furfural refinement device comprises a single-tower extraction device and a double-tower cascade extraction device or a double-tower solvent shunting extraction device, and a multi-stage extract recovery device is also coupled and mainly comprises an extract cooler, a liquid-liquid separator and a heater. The multi-stage extract recovery system is arranged, other devices are not introduced, follow-up high-energy-consumption devices for recovering solvents and the like are not involved, phase splitting is realized by controlling the temperature of an extract, low-temperature heat is fully used due to division of temperature cooling intervals, and a cooling medium is utilized reasonably and efficiently. The refined liquid yield can be increased by 5%-25%, all that is required is to control the outlet temperature of a heat exchanger, the device is applicable to different lubricating oils, particularly high non-ideal oils, the energy consumption cost is low, the technology is simple and practical, the equipment investment cost is low, and the extract oil quality is higher.

Description

technical field [0001] The invention relates to a lubricating oil furfural refining device and process. Background technique [0002] Lubricating oil contains some non-ideal components and substances that are not conducive to the use of lubricating oil, such as colloids, polycyclic aromatic hydrocarbons, heterocyclic compounds, naphthenic acids, and other compounds containing sulfur, nitrogen, and oxygen, which affect the physical properties of lubricating oil. Properties such as viscosity-temperature properties, anti-oxidation stability, residual carbon value, chroma, etc. have a great influence. In order to remove these substances, solvent refining of lubricating oil is required. At present, furfural is mainly used to refine lubricating oil in China. [0003] The furfural refining process of lubricating oil is a physical separation process involving liquid-liquid equilibrium. It utilizes the selectivity difference of each component in the solvent, and achieves the separa...

Claims

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Application Information

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IPC IPC(8): C10M177/00
CPCC10M177/00
Inventor 何昌春张冰剑陈清林汪勤刘雪刚陈俊杰高学农
Owner SUN YAT SEN UNIV
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