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Regeneration process for waste lubricating oil

A technology of waste lubricating oil and process method, which is applied in the direction of lubricating composition, etc., to achieve the effect of improving the effect, improving the quality of refining, and reducing the cost of regeneration

Inactive Publication Date: 2012-10-17
XINJIANG KUITUN NEW PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a process for regenerating waste lubricating oil, which can further reduce the refining temperature to an appropriate range, and then effectively reduce sulfuric acid. The amount of use can improve the effect of pickling. At the same time, it can also reduce the amount of clay used, greatly reduce the cost of regeneration, improve the quality of refining, and the diluent can also be recycled and reused, effectively saving resources and reducing environmental pollution.

Method used

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  • Regeneration process for waste lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: with reference to attached The figure is a schematic diagram of the process flow of Example 1 of the present invention. The waste lubricating oil 1 is classified and poured into the sedimentation tank, and part of the water and granular impurities 2 are removed through natural precipitation for more than 24 hours, and then the raw oil is Add it into the settling tank, heat it to 60-80°C, add 0.2-0.4 parts by weight of polyoxyethylene polyoxypropylene alkyl alcohol ether as a demulsifier and 0.05-0.15 parts by weight of polyacrylamide as a flocculant for every 100 parts by weight of waste lubricating oil , while feeding compressed air 3 for stirring, after stirring for 20-40 minutes, let it settle for 4-6 hours, discharge water and insoluble impurities 4, and the settled lubricating oil is heated to 260-270°C by a heating furnace and enters the distillation tower Distillation in medium, distill out the light fuel oil 5, the distilled lubricating oil is coo...

Embodiment 2

[0018] Example 2: Put the waste lubricating oil into the settling tank after 24 hours of natural precipitation in the settling tank, heat it to 60°C in the settling tank, add 0.4 parts by weight of demulsifier polyoxyethylene polyoxyethylene per 100 parts by weight of waste lubricating oil Propylene alkyl alcohol ether and 0.15 parts by weight of flocculant polyacrylamide are fed into the compressed air at the same time, stirred for 40 minutes, left to settle for 6 hours, water and impurities are discharged, and the settled lubricating oil is heated to 260°C in Distill in the distillation tower, distill the light fuel oil therein, the lubricating oil after distilling is cooled to 20 ℃ by heat exchanger, enters in the pickling tank, add 4 weight Parts of 120# solvent oil were diluted, and at the same time, high-pressure air was introduced to stir, and then 1 part by weight of 98% concentrated sulfuric acid was added, the temperature was controlled at 20°C, and stirring was con...

Embodiment 3

[0019] Example 3: The recovered waste lubricating oil enters the settling tank after 30 hours of natural precipitation in the settling tank, and is heated to 63°C in the settling tank, and 0.35 parts by weight of demulsifier polyoxyethylene is added per 100 parts by weight of waste lubricating oil Polyoxypropylene alkyl alcohol ether and 0.13 parts by weight of flocculant polyacrylamide, while feeding compressed air and stirring for 35 minutes, let it settle for 5.5 hours, drain water and impurities, and the settled lubricating oil is heated to 263 ℃ into the distillation tower for distillation, and the light fuel oil in it is distilled out. The distilled lubricating oil is cooled to 23°C through a heat exchanger and then enters the pickling tank. 3.5 parts by weight of 120# solvent oil are diluted, and at the same time, high-pressure air is introduced to stir, and then 1.5 parts by weight of 96% concentrated sulfuric acid is added, the temperature is controlled at 23°C, and ...

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Abstract

The invention discloses a regeneration process for waste lubricating oil. The process mainly comprises the procedures of deposition, distillation, pickling, adsorption with white clay and filtering and is characterized in that 2 to 4 parts by weight of No. 120 solvent naphtha is added into every 100 parts by weight of waste lubricating oil before pickling so as to realize dilution, then the procedures of pickling and adsorption with white clay are carried out and underpressure distillation is simultaneously carried out as adsorption with white clay is carried out so as to remove the No. 120 solvent naphtha through distillation. According to the invention, a diluent is added into waste lubricating oil for dilution to reduce viscosity of lubricating oil, which enables refining temperature to drop to an appropriate range, usage amount of sulfuric acid to be effectively reduced, pickling effects to be improved, usage amount of white clay to be reduced at the same time, regeneration cost to be substantially decreased and refining quality to be enhanced; and the diluent can be recycled, thereby effectively saving resources and further reducing pollution to the environment.

Description

technical field [0001] The invention relates to a regeneration process method of waste lubricating oil. Background technique [0002] At present, with the decrease of petroleum resources and the continuous increase of demand, the price of petroleum is also rising. The recycling of waste lubricating oil can not only reduce environmental pollution, but also effectively save resources. Therefore, the recycling of waste lubricating oil It is also particularly important. The regeneration of lubricating oil often adopts the acid-clay type treatment process. This refining method has the characteristics of less investment and strong adaptability. Widely, many lubricating oil recycling companies are characterized by small and medium-sized enterprises. [0003] In the traditional acid-clay refining process, the waste lubricating oil is first refined by acid. The factors affecting the acid refining are: the concentration of sulfuric acid, the viscosity of the waste lubricating oil and...

Claims

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Application Information

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IPC IPC(8): C10M175/00
Inventor 张宏萍牛胜利
Owner XINJIANG KUITUN NEW PETROCHEM
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