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Method for removing organochlorine in waste lubricating oil

A technology for waste lubricating oil and organic chlorine, which is applied in the directions of lubricating composition and multi-stage series refining process treatment, can solve the problem of low removal rate of organic chlorine, reduce the corrosion of hydrogenation equipment, widen sources, reduce The effect of organochlorine content

Inactive Publication Date: 2021-06-08
WUHAN KELIN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing pretreatment process can remove most of the mechanical impurities, ash, colloid and asphaltenes, the removal rate of organic chlorine in waste lubricating oil is very low

Method used

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  • Method for removing organochlorine in waste lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1. Polyethylene glycol monomethyl ether (MPEG-750) and potassium hydroxide were stirred to a homogeneous phase at 90°C and then reacted for 1 hour to obtain dechlorination agent 1#. Heat the waste lubricating oil containing 950ppm organic chlorine to 130°C after dehydration and removal of impurities, add dechlorination agent 1# and accelerator to the waste lubricating oil, stir the material for 2.5 hours, take oil samples for total Chlorine analysis.

[0023] According to the detection and analysis of this embodiment, it is found that the removal rate of organic chlorine reaches 95% when the accelerator aluminum is added to the reaction system; the organic chlorine removal rate reaches 93% when the accelerator nickel is added to the reaction system.

Embodiment 2

[0024] Example 2. Polyethylene glycol monomethyl ether (MPEG-400) and sodium carbonate were stirred at 110°C to a homogeneous phase and then reacted for 1 hour to obtain dechlorination agent 2#. Heat the waste lubricating oil containing 870ppm organic chlorine to 110°C after dehydrating and removing impurities, add dechlorinating agent 2# and accelerator to the waste lubricating oil, stir the material for 1.5 hours, and take oil samples for total Chlorine analysis.

[0025] According to the detection and analysis of this embodiment, it is found that the removal rate of organic chlorine reaches 92% when the accelerator aluminum is added to the reaction system; the organic chlorine removal rate reaches 93.8% when the accelerator nickel is added to the reaction system.

Embodiment 3

[0026] Example 3. Polyethylene glycol (PEG-200) and potassium carbonate were stirred to a homogeneous phase at 120°C and then reacted for 2 hours to obtain dechlorination agent 3#. Heat the waste lubricating oil containing 1260ppm organic chlorine to 80°C after dehydration and removal of impurities, add dechlorination agent 3# and accelerator aluminum to the waste lubricating oil, stir the material for 4 hours, take oil samples for total Chlorine analysis.

[0027] According to the detection and analysis of this example, it was found that after the reaction system was stirred for 4 hours, the removal rate of organic chlorine reached 93%, and when the dechlorination time was extended to 8 hours, the removal rate of organic chlorine reached 95.7%.

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Abstract

The invention relates to a method for removing organochlorine in waste lubricating oil. The method comprises the following steps of: dehydrating and purifying the waste lubricating oil containing the organochlorine, adding the waste lubricating oil into a reactor, adding a dechlorinating agent into the reactor, and effectively removing the organochlorine in the waste lubricating oil at a proper temperature and a normal pressure by taking transition metal as an accelerant. The method is mild in conditions, simple and easy to operate, and capable of efficiently removing the organochlorine in the waste lubricating oil at low cost, so the problems of corrosion, pipeline blockage and catalyst poisoning caused by the organochlorine in the waste lubricating oil to a subsequent hydrogenation device are solved.

Description

technical field [0001] The invention relates to a method for removing organic chlorine in waste lubricating oil, in particular to a method for dechlorinating waste lubricating oil containing different concentrations of organic chlorine. Background technique [0002] Chlorinated hydrocarbons often exist in waste lubricating oils, such as chlorinated paraffin (chlorine content 42% to 70%) is the most widely used chlorine-containing extreme pressure anti-wear agent, and the use of hexachlorocyclopentadiene Synthesize non-corrosive chlorine-containing extreme pressure agent as raw material. Other chlorinated hydrocarbons are mainly chlorinated aromatics. These chlorinated aromatics are common polychlorinated biphenyls (PCBs), diphenylfuran (PCDF), polychlorinated diphenyldioxin (PCDD), polychlorinated terphenyl (PCT), etc. PCBs have highly stable physical and chemical properties, heat resistance, acid resistance, alkali resistance, corrosion resistance and oxidation resistance,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/02C10M175/00
CPCC10G53/02C10M175/00
Inventor 张先茂王栋斌王国兴王泽周正陈凯金建涛彭渺王瑜
Owner WUHAN KELIN FINE CHEM
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