Waste lubricating oil treatment method

A technology for waste lubricating oil and treatment method, which is applied in the treatment of hydrocarbon oil, lubricating composition, petroleum industry, etc. Effect

Active Publication Date: 2017-10-17
NINGBO ZHONGXUN ENVIRONMENTAL TECH CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different sources of waste oil, the complex impurities and components of waste oil, especially the high metal content, higher requirements are placed on the continuity of the production process and the stability of long-term operation

Method used

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  • Waste lubricating oil treatment method

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Experimental program
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Effect test

Embodiment 1

[0025] Waste lubricating oil processing method, comprises the following steps:

[0026] (1) Direct current treatment: After adding 8wt% deionized water and 20μg·g-1 water-separating agent (the water-separating agent is an ether compound) to the raw material of waste lubricating oil, it enters the direct current treatment tank. , stay at 100°C for 20 minutes to obtain upper layer oil and lower layer water;

[0027] (2) The lower water phase from the direct current treatment tank enters the membrane treatment unit, and the clean water can be recycled through nanofiltration membrane treatment and added to the waste lubricating oil, and the sludge is used as a raw material for asphalt production;

[0028] (3) The oil phase in the upper layer of the direct current treatment tank enters the moderate thermal conversion reactor, and reacts at 360°C and normal pressure for 80 minutes to obtain the product after thermal conversion;

[0029] ⑷The product after thermal conversion enters ...

Embodiment 2

[0031] Waste lubricating oil processing method, comprises the following steps:

[0032] (1) Direct current treatment: add 5wt% deionized water and 10 μg g-1 water-separating agent to the waste lubricating oil raw material (the water-separating agent is an equal mass mixture of polyoxyethylene alkyl alcohol ether and polyoxyethylene alkylamine) Finally, enter the direct current treatment tank, and stay for 50 minutes under the condition of direct current electric field strength of 500V / cm and temperature of 70°C to obtain the upper layer of oil and the lower layer of water;

[0033] (2) The lower water phase from the direct current treatment tank enters the membrane treatment unit, and the clean water can be recycled through nanofiltration membrane treatment and added to the waste lubricating oil, and the sludge is used as a raw material for asphalt production;

[0034] (3) The oil phase in the upper layer of the direct current treatment tank enters the moderate thermal convers...

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Abstract

The invention provides a waste lubricating oil treatment method. The waste lubricating oil treatment method comprises the following steps: (1) performing direct current treatment, namely injecting water into waste lubricating oil, adding a water separating agent, and performing direct current treatment to separate oil from water to obtain upper oil and lower water; (2) performing mild heat conversion treatment, namely, performing a heat conversion reaction on the upper oil obtained in the step (1) in a mild heat conversion reactor to obtain a product which is subjected to the heat conversion treatment; and (3) performing molecular distillation, namely, performing molecular distillation on the product which is subjected to the heat conversion treatment in the step (2) to obtain the fraction less than 360 DEG C, the fraction greater than or equal to 360 DEG C and less than or equal to 500 DEG C, and the fraction greater than 500 DEG C, wherein the fraction greater than or equal to 360 DEG C and less than or equal to 500 DEG C serves as lubricating oil base oil or a hydro-upgraded raw material. According to the method, non-prime components, such as water, metals and ash, in the waste lubricating oil are removed more easily; and the lubricating oil fraction yield is high.

Description

technical field [0001] The invention belongs to the technical field of waste lubricating oil treatment, and in particular relates to a method for combined treatment of waste lubricating oil by electric treatment and heat conversion. Background technique [0002] my country is the third largest lubricating oil consumer in the world after the United States and Russia, and consumes more than 6-8 million tons of lubricating oil every year. With the increase in the number of motor vehicles and the increase in the consumption of lubricating oil, the amount of waste oil replaced by vehicles and equipment has soared every year. If these waste lubricating oils are discarded, it will bring great harm to the ecological environment and cause a great waste of energy. With the decrease of petroleum resources and the continuous rise of crude oil prices, the contradiction between energy supply and demand is prominent. Therefore, the recycling and reuse of waste lubricating oil is a practic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G57/00C10M175/02C10M175/00
CPCC10G57/00C10G2300/1007C10G2300/201C10M175/0025C10M175/0033C10M175/0066C10M175/02
Inventor 王鸣李传邓文安
Owner NINGBO ZHONGXUN ENVIRONMENTAL TECH CO LLC
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