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Regenerating method of waste lubricating oil

A technology of waste lubricating oil and regenerated base oil, which is applied in the direction of lubricating compositions, etc., can solve the problems of regeneration method corrosion, environmental pollution, harsh treatment conditions, etc., and achieve the effect of simple regeneration method, less equipment investment and low operating cost

Active Publication Date: 2017-05-31
盱眙凹土能源环保材料研发中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A lot of research has been done on the regeneration method of waste lubricating oil at home and abroad. The regeneration method of waste lubricating oil in foreign countries is mainly hydrofining technology, and its regeneration treatment conditions are relatively harsh; while the regeneration method of waste lubricating oil in my country is still in a relatively backward state. The technical route is the main one, but this regeneration method corrodes equipment and pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: regenerate waste lubricating oil according to the following steps

[0014] (1) Flocculation: add flocculant polyaluminum chloride to waste lubricating oil, and stir for 0.5 h at 50 °C; the amount of flocculant is 0.5% of the waste lubricating oil;

[0015] (2) Demulsification: Add the demulsifier polyoxypropylene polyoxyethylene propylene glycol ether into the flocculation reaction mixture, and stir at 50°C for 0.5h; the amount of the demulsifier is 0.5% of the waste lubricating oil;

[0016] (3) Settling: Put the demulsified mixture into a settling tank for settling. The settling time is 10 hours and the settling temperature is 100°C. After settling, the oil and impurities are layered and separated, the oil is in the upper layer, and the impurities are in the lower layer;

[0017] (4) The first step of extraction: mix the settled oil with ethanol solvent, the mass ratio of the solvent to the settled oil is 3:1, add 1.0% KOH of the mass of the settled oil,...

Embodiment 2

[0021] Embodiment 2: Regenerate waste lubricating oil according to the following steps

[0022] (1) Flocculation Add flocculant polyaluminum sulfate to the waste lubricating oil and stir at 80 °C for 2.0 h; the amount of the flocculant is 5.0% of the waste lubricating oil;

[0023] (2) Demulsification: Add the demulsifier polyoxypropylene polyoxyethylene propylene glycol ether into the flocculation reaction mixture, and stir at 50°C for 0.5h; the amount of the demulsifier is 0.5% of the waste lubricating oil;

[0024] (3) Settling: Put the demulsified mixture into a settling tank for settling. The settling time is 10 hours and the settling temperature is 100°C. After settling, the oil and impurities are layered and separated, the oil is in the upper layer, and the impurities are in the lower layer;

[0025] (4) The first step of extraction: mix the settled oil with ethanol solvent, the mass ratio of the solvent to the settled oil is 5:1, add 1% KOH of the mass of the settled o...

Embodiment 3

[0029] Embodiment 3: regenerate waste lubricating oil according to the following steps

[0030] (1) Flocculation: add flocculant polyacrylamide to the waste lubricating oil, stir at 80 °C for 3.0 h; the amount of the flocculant is 1.0% of the waste lubricating oil;

[0031] (2) Demulsification: Add the demulsifier polyoxypropylene polyoxyethylene propylene glycol ether into the flocculation reaction mixture, and stir at 50°C for 0.5h; the amount of the demulsifier is 0.5% of the waste lubricating oil;

[0032] (3) Settling: Put the demulsified mixture into a settling tank for settling. The settling time is 48 hours, settling temperature is 25°C, and the settled oil and impurities are layered and separated. The oil is in the upper layer and the impurities are in the lower layer;

[0033] (4) The first step of extraction: mix the settled oil with ethanol solvent, the mass ratio of the solvent to the settled oil is 3:1, add 1% KOH of the mass of the settled oil, stir at room temp...

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Abstract

The invention relates to a regenerating method of waste lubricating oil. The regenerating method comprises the following steps in sequence: flocculation, demulsification, sedimentation, two-step extraction, clay refining and filtering. According to the method disclosed by the invention, colloid, asphaltene, metal powder, ash and the like in the waste lubricating oil are well removed, and clear and transparent oil is obtained, so that the method has the advantages of little regenerating equipment investment, simple regenerating method, low operating cost, convenient and safe operation and the like, waste residues generated after flocculation can be used for reprocessing ink, secondary pollution cannot be generated, the method has certain economic benefits, the method is suitable for the national conditions that the waste lubricating oil in our country is small in regeneration scale, little in investment, backward in technology and the like, and the method has great significant in economic and social sustainable development.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a method for regenerating waste lubricating oil. Background technique [0002] Lubricating oil is a high value-added product extracted from petroleum. The output of lubricating oil in my country accounts for about 2% of the total petroleum products. During use, self-oxidation under high temperature, high pressure and other environments, due to physical or chemical factors, the lubricating oil contains aldehydes, ketones, resins, asphalt colloidal substances, carbon black and organic acids, salts, water, metal debris, etc. Impurities cause changes in the performance of the lubricating oil, and the lubricating oil even loses its functions of reducing friction, cooling, sealing and isolation, and reducing vibration. Therefore, after the lubricating oil has been used for a certain period of time, when the deterioration reaches a certain level, it must be replaced. However, peo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M175/00
CPCC10M175/0083
Inventor 陈新德彭芬陈雪芳黄超张海荣郭海军王璨熊莲
Owner 盱眙凹土能源环保材料研发中心
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