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Environment-friendly purification method for waste oil of automobile industry

A technology for the automotive industry and environmental protection, applied in the direction of lubricating compositions, etc., can solve problems such as economic impossibility

Inactive Publication Date: 2015-03-25
华文蔚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3. It is not economically feasible to effectively remove high-boiling organic halogen compounds (such as chlorine compounds) from waste oil to a residual level below about 100 mg chlorine / kg oil
The use of phase chemistry methods to improve the separation of impurities including specific and / or dissolved inorganic or organic agents from process oils of the rolling oil or engine lubricating oil type has not been previously described

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for environmentally friendly purification of waste oil in the automobile industry, the method comprising: mixing waste oil with an additive comprising at least one alkanolamine and an alkene acid liquid mixture with 4 carbon atoms, the pH of the mixture is 5 ., said mixture is substantially insoluble in waste oil, and forms a two-phase mixture when mixed, followed by two-phase separation, mixed in a stripping device, the enoic acid is selected from lauric acid, oleic acid or octanoic acid, the two The separation of the phases is carried out by a single or combined method selected from centrifugation, vacuum filtration and centrifugal filtration, the addition of the mixture is calculated as 3% by weight based on the weight of the process waste oil, and the method is carried out at a temperature of 25 ° C, The waste oil was selected from waste gasoline / diesel engine lubricating oil, and the two-phase separation was carried out for about 24 hours.

Embodiment 2

[0022] A method for environmentally friendly purification of waste oil in the automotive industry, the method comprising: mixing waste oil with an additive comprising at least one alkanolamine and an alkene acid liquid mixture with 5 carbon atoms, the pH of the mixture is 5.2 , the mixture is substantially insoluble in waste oil, forms a two-phase mixture when mixed, and then separates the two phases, mixed in a stripping device, the olefinic acid is selected from oleic acid or, the separation of the two phases is carried out by selecting Self-centrifugal separation, vacuum filtration and centrifugal filtration are carried out individually or in combination, the addition of the mixture is 5% by weight based on the weight of process waste oil, the method is carried out at a temperature of 25°C, and the waste oil is selected from waste Gasoline / diesel engine oil, two-phase separation for about 12 hours.

Embodiment 3

[0024] A method for environmentally friendly purification of waste oil in the automobile industry, the method comprising: mixing waste oil with an additive comprising at least one of the following liquid mixtures of alkanolamines and olefinic acids, the pH of the mixture is 5.8, and the mixture is basically Insoluble in waste oils, forms a two-phase mixture when mixed, after which two phases are separated, the mixing is carried out in a stripping plant, the enoic acid is selected from octanoic acid, the separation of the two phases is carried out by means selected from centrifugation, vacuum filtration and centrifugation The method of filtering is carried out alone or in combination, and the addition amount of the mixture is calculated as 5% by weight based on the weight of process waste oil. The method is carried out at a temperature of 25°C. The waste oil is selected from waste gasoline / diesel engine lubricating oil, two Phase separation was carried out for about 18 hours.

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PUM

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Abstract

The invention discloses an environment-friendly purification method for waste oil of automobile industry. The method comprises a step of mixing the waste oil with an additive which contains at least one of alkanolamine and an olefine acid liquid mixture having 4-12 carbon atoms, wherein the pH value of the mixture is 5.2 to 6.5; the mixture is basically insoluble in the waste oil; a two-phase mixture is formed during mixing; afterwards, the two phases are separated; the mixing is performed in steam stripping equipment; olefine acid is selected from lauric acid, oleic acid and octanoic acid; the separation of the two phases is performed in a manner of each or combination of centrifugal separation, vacuum filtration and centrifugal filtration; the amount of the added mixture is 3% to 8% by weight based on the weight of the technological waste oil; the method is implemented at the temperature of 25-35 DEG C; the waste oil is selected from waste gasoline / diesel engine lubricating oil; the separation of the two phases is performed for about 1-24 hours. The method disclosed by the invention is environment-friendly in process and can be used for solving the problems caused in waste oil treatment.

Description

technical field [0001] The invention relates to an environment-friendly method for purifying waste oil in the automobile industry, which effectively recovers the waste oil for reuse. Background technique [0002] The existing effective recovery of waste oil for reuse, the so-called recycling, is beneficial both from an economical and an ecological point of view. In most countries, the use of recovered or recycled oil (hereafter referred to as reprocessed waste oil) as fuel or propellant is subject to government regulations because impurities may be released into the atmosphere causing damage. In some cases, such as when used as fuel oil, the combustion products of impurities are very harmful. Similar problems exist in other cases where reprocessed waste oils are used, for example if they are used as crude oil for the manufacture of lubricating oils. [0003] The most commonly specified reprocessed waste oil impurities for environmental reasons include inorganic and organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M175/00
Inventor 华文蔚
Owner 华文蔚