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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 not taking into account the metal removal of additives and affecting the effect of pretreatment, etc.

Active Publication Date: 2013-04-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the currently disclosed technologies do not combine the flocculation reaction and demetallization reaction of waste oil, but only focus on one reaction, so the removal of additives, soot, residual asphalt and metals cannot be taken into account, which affects the effect of pretreatment

Method used

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  • Waste lubricating oil pretreatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) filter the waste internal combustion engine oil I with a wire mesh (150 mesh) to remove large mechanical impurities;

[0023] 2) Take 400 g of waste lubricating oil I in step 1), add 8 g of pretreatment agent to it, and keep stirring and reacting at 30° C. for 20 minutes; the pretreatment agent is a commercially available organic flocculant A and a commercially available The mixture of metal agent B, the mass ratio of A and B mixed is 0.9:1 (m / m);

[0024] 3) Put the reacted mixture in a three-necked flask for flash evaporation to remove water and light hydrocarbons (nitrogen gas protection, control the temperature of the kettle ≯ 200°C);

[0025] 4) Centrifugal deslagging of materials from which light hydrocarbons, moisture, and gasoline have been removed;

[0026] 5) After the centrifugation, pour out the supernatant as the pretreated oil, and analyze the relevant properties of the pretreated oil.

[0027] At the same time, only the waste internal combustion engi...

Embodiment 2

[0032] 1) Use wire mesh (150 mesh) to filter waste internal combustion engine oil II to remove large mechanical impurities;

[0033] 2) Take 400g of the waste lubricating oil II in step 1), add 8g of pretreatment agent to it, and keep stirring and reacting at 30°C for 20 minutes; the pretreatment agent is a commercially available organic flocculant A and a commercially available The mixture of metal agent B, the mass ratio of A and B mixed is 1.1:1 (m / m);

[0034] 3) Place the reacted mixture in a three-necked flask for flash evaporation to remove water and light hydrocarbons (nitrogen gas protection, control the temperature of the kettle ≯ 200°C);

[0035] 4) Centrifugal deslagging of materials from which light hydrocarbons, moisture, and gasoline have been removed;

[0036] 5) After the centrifugation is completed, the supernatant is poured out as the pretreated oil, and the relevant properties of the pretreated oil are analyzed.

[0037] At the same time, only the waste i...

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Abstract

The invention relates to a waste lubricating oil pretreatment technique, belonging to pretreatment of waste lubricating oil before refinement. The invention aims to remove nonideal components (such as light hydrocarbons, moisture, gasoline, metal particles, carbon granules, dust, oil sludge, additives, residue asphalt, mechanical impurities and the like) in the waste oil to obtain the pretreated oil without impurities. The technique is characterized by comprising the following steps: 1) filtering the waste oil to remove large mechanical impurities; 2) adding 0.5-3.0% of pretreating agent, and stirring to react at the constant temperature of 30 DEG C for 20-60 minutes, wherein the pretreating agent is a mixture of organic flocculent and demetallizing agent in a ratio of (0.5-1.5):1 (m / m); 3) carrying out atmospheric flash evaporation on the reaction product in a distillation kettle, gradually heating in a nitrogen atmosphere to sequentially distil out light hydrocarbons, water and gasoline, and finally controlling the kettle temperature at less than 200 DEG C to remove the light hydrocarbons, moisture and gasoline; and 4) carrying out centrifugal slag removal treatment to obtain the pretreated oil.

Description

technical field [0001] The invention relates to a method for pretreatment of waste lubricating oil, which belongs to the field of regeneration of waste lubricating oil. technical background [0002] Lubricating oil will gradually age and deteriorate due to high temperature and air oxidation during use. In addition, metal powder from friction parts, impurities and moisture entering from the environment will not only pollute the oil, but also promote lubrication. Oxidation of oil. As a result, the color of the lubricating oil gradually becomes muddy, the acid value rises, and deposits, sludge, and paint film are produced, which cause various failures of the machine. Therefore, after the lubricating oil has been used for a certain period of time and has deteriorated to a certain extent, it must be replaced, and the replaced oil is waste oil. What deteriorates in waste oil is only some of the hydrocarbons, accounting for about 10% to 25%, and most of the rest of the hydrocarbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M175/00
Inventor 邓永生彭立苏辉陈庭喜郭小燕
Owner PETROCHINA CO LTD
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