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Pollution-free waste lubricating oil regeneration process

A waste lubricating oil, pollution-free technology, applied in the direction of lubricating composition, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of reduced quality of regenerated lubricating oil, increased regeneration cost, reduced performance of filter membrane, etc., and achieve emission reduction Reduced effect

Inactive Publication Date: 2021-02-02
杭州悦仕达新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing waste lubricating oil regeneration process is more polluting, and in the filtration process, due to the poor oil resistance of the filter membrane, after repeated filtration, the performance of the filter membrane is reduced, which makes the quality of the regenerated lubricating oil decrease, and then Reduced product quality and increased recycling costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A pollution-free waste lubricating oil regeneration process specifically includes the following steps:

[0028] Step S1: After the waste lubricating oil is left to stand for dehydration, under the conditions of a temperature of 260°C and a vacuum of 2.8kPa, distillation is carried out to remove the distillate to obtain a primary distillation substrate, which is then heated at a temperature of 420°C , the vacuum degree is under the condition of 0.2kPa, carries out distillation to remove distillate, obtains secondary distillation substrate;

[0029] Step S2: Add the secondary distillation substrate into the stirred tank, stir at a speed of 300r / min, and a temperature of 60°C, add an aqueous solution of polyacrylamide, stir for 20 minutes, and then heat up to a temperature of 80°C. Add aqueous potassium hydroxide solution and continue to stir for 20 minutes to obtain a flocculation solution;

[0030] Step S3: adding clay to the flocculation solution prepared in step S2, s...

Embodiment 2

[0038] A pollution-free waste lubricating oil regeneration process specifically includes the following steps:

[0039] Step S1: After the waste lubricating oil is left to stand for dehydration, under the conditions of a temperature of 260°C and a vacuum of 3.0kPa, distillation is carried out to remove the distillate to obtain a primary distillation substrate, which is then heated at a temperature of 420°C , under the condition of vacuum degree of 0.5kPa, carry out distillation to remove distillate, obtain secondary distillation substrate;

[0040] Step S2: Add the secondary distillation substrate into the stirred tank, stir at a rotation speed of 300r / min, and a temperature of 70°C, add a polyacrylamide aqueous solution, stir for 20 minutes, and then heat up to a temperature of 90°C. Add aqueous potassium hydroxide solution and continue to stir for 20 minutes to obtain a flocculation liquid;

[0041] Step S3: adding clay to the flocculation liquid prepared in step S2, stirrin...

Embodiment 3

[0049] A pollution-free waste lubricating oil regeneration process specifically includes the following steps:

[0050] Step S1: After the waste lubricating oil is left to stand for dehydration, under the conditions of a temperature of 280°C and a vacuum of 2.8kPa, distillation is carried out to remove the distillate to obtain a primary distillation substrate, which is then heated at a temperature of 430°C , the vacuum degree is under the condition of 0.2kPa, carries out distillation to remove distillate, obtains secondary distillation substrate;

[0051] Step S2: Add the secondary distillation substrate into the stirred tank, stir at a rotation speed of 500r / min, and a temperature of 60°C, add a polyacrylamide aqueous solution, stir for 30 minutes, and then heat up to a temperature of 80°C. Add aqueous potassium hydroxide solution and continue stirring for 30 minutes to obtain a flocculation liquid;

[0052] Step S3: adding clay to the flocculation solution prepared in step S...

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PUM

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Abstract

The invention discloses a pollution-free waste lubricating oil regeneration process which comprises the following steps: standing and dehydrating waste lubricating oil, distilling the dehydrated wastelubricating oil to remove part of impurities, carrying out secondary distillation on a primary distillation substrate, and removing part of impurities to obtain a secondary distillation substrate; using a polyacrylamide aqueous solution and a potassium hydroxide aqueous solution or flocculation, then using carclazyte for adsorbing flocculation, precipitating and centrifuging impurities, removingprecipitates, obtaining upper-layer oil, and filtering the upper-layer oil through a reinforced filter membrane to prepare the regenerated lubricating oil. According to the process, few harmful reagents are used, emission of pollutants is reduced, an enhanced filter membrane is prepared, the enhanced filter membrane has high oil resistance, the filter membrane cannot be corroded by oil after multiple times of filtration, the service life of the filter membrane is prolonged, meanwhile, the surface of the enhanced filter membrane contains nano titanium dioxide and nano silicon dioxide, a filtercake has a certain self-cleaning effect, and the filter membrane is more convenient to clean.

Description

technical field [0001] The invention relates to the field of lubricating oil regeneration technology, in particular to a pollution-free waste lubricating oil regeneration technology. 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...

Claims

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Application Information

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IPC IPC(8): C10M175/00B01D69/02B01D67/00
CPCB01D67/0079B01D69/02C10M175/0016C10M175/0033C10M175/0058C10M175/0083
Inventor 俞嘉华赵红冉曾红玲
Owner 杭州悦仕达新材料科技有限公司