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Waste lubricating oil pretreatment method

A technology for waste lubricating oil and pretreatment, applied in the direction of lubricating composition, etc., can solve problems such as ineffectiveness, and achieve the effects of simple operation, simple pretreatment process and low operating cost.

Active Publication Date: 2016-07-13
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

However, most industries only use simple sedimentation, filtration, centrifugation, etc. as the pretreatment process for refining waste lubricating oil, which is far from the expected effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: Pretreat waste lubricating oil according to the following steps

[0012] (1) Oxidative decolorization: put waste lubricating oil into the reactor, add sodium hydroxide solution, the dosage of sodium hydroxide is 1% of the amount of waste lubricating oil; oxidize it with oxidant sodium hypochlorite at 60°C, The reaction time is 1.0h, and the dosage of oxidant is 5% of the waste lubricating oil;

[0013] (2) Flocculation: add flocculant polysilicate ferric sulfate to the oxidation reaction mixture, and stir at 60°C for 5.0 hours; the amount of the flocculant is 1.0% of the waste lubricating oil;

[0014] (3) Demulsification: Add SP-type demulsifier to the flocculation reaction mixture and stir at 60°C for 1.0 h; the amount of the demulsifier is 1.0% of the waste lubricating oil;

[0015] (4) Settling: Put the demulsified mixture into a settling tank for settling, the settling time is 12 hours, and the settling temperature is 40°C;

[0016] (5) Separation: ...

Embodiment 2

[0017] Embodiment 2: Pretreat waste lubricating oil according to the following steps

[0018] (1) Oxidative decolorization: put waste lubricating oil into the reactor, add sodium hydroxide solution, the dosage of sodium hydroxide is 3% of the amount of waste lubricating oil; oxidize it with oxidant hydrogen peroxide at 60°C, The reaction time is 2.0h, and the dosage of oxidant is 10% of the waste lubricating oil;

[0019] (2) Flocculation: add flocculant polysilicate ferric sulfate to the oxidation reaction mixture, and stir at 60°C for 4.0 hours; the amount of the flocculant is 3.0% of the waste lubricating oil;

[0020] (3) Demulsification: Add SP-type demulsifier to the flocculation reaction mixture and stir at 60°C for 2.0 hours; the amount of the demulsifier is 3.0% of the waste lubricating oil;

[0021] (4) Settling: put the demulsified mixture into a settling tank for settling, the settling time is 10 hours, and the settling temperature is 60°C;

[0022] (5) Separatio...

Embodiment 3

[0023] Embodiment 3: Pretreat waste lubricating oil according to the following steps

[0024] (1) Oxidative decolorization: put waste lubricating oil into the reactor, add soda ash solution, the dosage of soda ash is 9% of the amount of waste lubricating oil; oxidize it with oxidant hydrogen peroxide at 80°C, and the reaction time is 2.0 h, the dosage of oxidant is 15% of the waste lubricating oil;

[0025] (2) Flocculation: add a flocculant amphoteric polyacrylamide polymer to the oxidation reaction mixture, and stir at 80°C for 3.0 hours; the amount of the flocculant is 5.0% of the waste lubricating oil;

[0026] (3) Demulsification: Add AP-type demulsifier to the flocculation reaction mixture and stir at 80°C for 3.0 hours; the amount of the demulsifier is 1.0% of the waste lubricating oil;

[0027] (4) Settling: Put the demulsified mixture into a settling tank for settling, the settling time is 8 hours, and the settling temperature is 60°C;

[0028] (5) Separation: direc...

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Abstract

The invention relates to waste lubricating oil pretreatment method. The method comprises steps as follows: oxidative decolorization, flocculation, demulsification, sedimentation and separation. According to the waste lubricating oil pretreatment method, impurities such as colloid, asphaltene, metal powder, ash and the like in waste lubricating oil can be removed, and transparent pretreated oil is obtained; the method adopts a simple process and is energy-saving, environment-friendly, low in operating cost and simple and safe to operate; further, waste residues produced after flocculation are reprocessed to be used for printing ink and the like, secondary pollution can be avoided, certain economic benefits are obtained, and accordingly, the method is suitable for national conditions of small scale, low funds and backward technology for waste lubricating oil recovery.

Description

technical field [0001] This description relates to the field of petrochemical industry, in particular to a method for pretreatment of waste lubricating oil. Background technique [0002] During the use of lubricating oil, it oxidizes itself 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, and metal debris. Impurities such as shavings, lead to changes in the performance of the lubricating oil, and the lubricating oil even loses the effects 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, the lack of people's understanding of waste lubricating oil has led to waste lubricating oil being used as fuel for direct co...

Claims

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Application Information

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IPC IPC(8): C10M175/00
CPCC10M175/00C10M175/0016
Inventor 陈新德彭芬张海荣熊莲郭海军王璨杨丹
Owner 盱眙凹土能源环保材料研发中心
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