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A kind of waste lubricating oil pretreatment method

A waste lubricating oil and pretreatment technology, which is applied in the direction of lubricating compositions, etc., can solve the problems of poor balance between additives, residual asphalt metal removal, poor metal ion removal effect, and low recycling rate of waste lubricating oil. Achieve the effects of good pretreatment effect, small impurity particles, and low initial investment in equipment

Active Publication Date: 2021-04-06
NINGBO ZHONGXUN ENVIRONMENTAL TECH CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently disclosed waste lubricating oil pretreatment methods include distillation, sedimentation, flocculation, membrane filtration, etc. The distillation and sedimentation methods have simple processes, low raw material prices, and low equipment costs, but the heat treatment during waste oil distillation will destroy the clean and dispersed Due to the dispersed state of the solvent, the suspended solid impurities are deposited on the tray, packing and furnace tube, blocking the channel, affecting the long-term operation of the waste oil distillation equipment, and the waste lubricating oil produced by distillation and sedimentation has a low regeneration utilization rate, and the lubrication after regeneration The quality of the oil is not high; the flocculation method is not effective in removing metal ions (especially calcium, magnesium, zinc, iron, sodium) due to improper selection of complexing agents, and the residual metal ions will cause subsequent hydrofining, Catalyst poisoning and deactivation in processes such as hydrocracking is not conducive to subsequent treatment; membrane filtration uses organic or inorganic membranes of different pore sizes to filter, but due to insufficient pre-treatment of waste lubricating oil, the particle size of impurities in waste lubricating oil is too large Large, easy to block and pollute the ceramic membrane, so the ceramic membrane needs to be replaced frequently, resulting in high cost of this method
In the currently disclosed technology, the complexing agent treatment of waste lubricating oil is not combined with membrane filtration, and the removal of additives, residual asphalt and metals cannot be well taken into account, which affects the pretreatment effect

Method used

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  • A kind of waste lubricating oil pretreatment method
  • A kind of waste lubricating oil pretreatment method
  • A kind of waste lubricating oil pretreatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Pump the waste lubricating oil into the oil tank with stirring, stir for 30 minutes, control the temperature at 80°C, and let it settle for 10 hours to remove large mechanical impurities and part of the water;

[0025] Take 100 parts of waste lubricating oil in the upper layer after settling and add it to the reaction kettle, add 1 part of complexing agent to make an aqueous solution, the complexing agent is a mixture of sulfates, amides and phosphates, constant at 90 Stir the reaction at ℃ for 30 minutes, continue to heat up to 150 ℃, stir and dehydrate for 30 minutes.

[0026] After the complexation reaction, the mixture is subjected to centrifugation and slag removal;

[0027] Take the supernatant liquid after centrifugal deslagging treatment and place it in a container for flash evaporation, take the supernatant liquid after centrifugal deslagging treatment and place it in a container for flash evaporation, gradually heat up in nitrogen atmosphere, and steam light h...

Embodiment 2

[0034] Pump the waste lubricating oil into the oil tank with stirring, stir for 30 minutes, control the temperature at 80°C, and let it settle for 10 hours to remove large mechanical impurities and part of the water;

[0035] Take 100 parts of waste lubricating oil in the upper layer after settling and add it to the reaction kettle, and add 2 parts of complexing agent to form an aqueous solution. The complexing agent is a mixture of sulfates, amides and phosphates, which is constant at 90 Stir and react at ℃ for 30 minutes, continue to heat up to 150 ℃, stir and dehydrate for 30 minutes;

[0036] After the complexation reaction, the mixture is subjected to centrifugation and slag removal;

[0037] Take the supernatant liquid after centrifugal deslag treatment and place it in a container for flash evaporation, gradually heat up in nitrogen atmosphere, and steam out light hydrocarbons, water, and gasoline in sequence, and finally control the temperature of the kettle not to exce...

Embodiment 3

[0043] Pump the waste lubricating oil into the oil tank with stirring, stir for 30 minutes, control the temperature at 80°C, and let it settle for 10 hours to remove large mechanical impurities and part of the water;

[0044] Take 100 parts of the upper layer of waste lubricating oil after settling and add it to the reaction kettle, add 1 part of complexing agent to make an aqueous solution, the complexing agent is a mixture of sulfates, amides and phosphates, and keep it at 90°C Stir and react for 30 minutes, continue to heat up to 150°C, and stir and dehydrate for 30 minutes;

[0045] After the complexation reaction, the mixture is subjected to centrifugation and slag removal;

[0046] Take the supernatant liquid after centrifugal deslag treatment and place it in a container for flash evaporation, gradually heat up in nitrogen atmosphere, and steam out light hydrocarbons, water, and gasoline in sequence, and finally control the temperature of the kettle not to exceed 200°C t...

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Abstract

The invention provides a waste lubricating oil pretreatment method, which combines complexation, centrifugation, flash evaporation, membrane filtration and other methods to remove residual asphalt, metal impurities, water and light hydrocarbons, so that the subsequent treatment of waste lubricating oil is more efficient. The invention combines complexing agent treatment of waste lubricating oil with membrane filtration, can take into account the removal of additives, residual asphalt and metal, has high removal rate of impurities in waste lubricating oil, good pretreatment effect, simple operation process, The initial investment in equipment is small, and it is easy to realize market promotion.

Description

technical field [0001] The invention relates to the technical field of recycling waste lubricating oil, in particular to a pretreatment method for waste lubricating oil. Background technique [0002] With the development of my country's machinery industry, the demand for lubricating oil continues to increase, and when lubricating oil is used under high temperature and high pressure conditions, its composition, structure and performance will undergo significant changes: due to high temperature and air oxidation, it will gradually age and deteriorate; friction parts will wear down Moisture entering the oil due to metal powder, breathing and other reasons, and impurities from the ambient air will also promote the oxidation of lubricating oil. This has led to the fact that in addition to most of the base oil, the waste lubricating oil also contains non-ideal components such as water, light hydrocarbons, metal particles, carbon particles, ash, sludge, additives, residual asphalt a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M175/00
CPCC10M175/00C10M175/0016C10M175/0033C10M175/0058
Inventor 王鸣姚靖靖张帅侯东阳孟家平
Owner NINGBO ZHONGXUN ENVIRONMENTAL TECH CO LLC
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