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Pretreatment process for regenerating high-quality base oil by using waste lubricating oil

A technology of waste lubricating oil and pretreatment, applied in the direction of lubricating composition, etc., can solve the problems of unclear interface, emulsification, corrosion, etc., and achieve the effect of solving corrosion

Active Publication Date: 2018-09-28
湖北科润石化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a pretreatment process for regenerating high-quality base oil from waste lubricating oil, which can not only solve the problems of corrosion, pipeline blockage and catalyst poisoning caused by organochlorine to waste lubricating oil regeneration equipment, but also solve the problems caused by cleaning and dispersing agents and Other surfactants are easy to cause emulsification during solvent refining, making it difficult to separate the two phases and the interface is unclear, which improves the yield of refined oil and provides high-quality raw materials for subsequent hydrogenation units

Method used

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  • Pretreatment process for regenerating high-quality base oil by using waste lubricating oil
  • Pretreatment process for regenerating high-quality base oil by using waste lubricating oil

Examples

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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, after dehydration and removal of impurities from the waste lubricating oil raw materials from the tank area, the raw materials are heat-exchanged to 335°C and enter the dechlorination reactor with a stirring device for dechlorination reaction; then enter the heating furnace and are heated to 380°C After entering the hydrogen catalytic thermal decomposition reactor at 380 °C for 30 minutes; the waste lubricating oil after hydrogen catalytic thermal decomposition enters the heat exchanger and is heat exchanged to 170 °C, then enters the atmospheric flash tower to remove moisture and light High-quality oil; the raw material after removing moisture and light oil is heat-exchanged to 95°C, and then pumped up to 6.0MPa to enter the propane refining unit. Additives in waste lubricating oil and condensates, colloids, and asphaltenes produced by high-temperature oxidation , metal salts produced by organic acids corroding metals, and other mechanical im...

Embodiment 2

[0027] Such as figure 1 As shown, after dehydration and removal of impurities from the waste lubricating oil raw materials from the tank area, the raw materials are heat-exchanged to 370°C and enter the dechlorination reactor with stirring device for dechlorination reaction; then enter the hydrogen catalytic thermal decomposition reactor , stay at 370°C for 80 minutes; the waste lubricating oil after hydrocatalytic thermal decomposition enters the heat exchanger and is heat-exchanged to 240°C, then enters the atmospheric flash tower to remove moisture and light oil; remove moisture and light oil The final raw material is heat-exchanged to 70°C, and then pumped up to 4.0MPa to enter the propane refining unit. The additives in the waste lubricating oil and the condensate produced by high-temperature oxidation, colloid, asphaltenes, and metal salts produced by organic acid corrosion of metals, And other mechanical impurities are discharged from the bottom of the extraction tower,...

Embodiment 3

[0029] Such as figure 1As shown, after dehydration and removal of impurities from the waste lubricating oil raw materials from the tank area, the raw materials are heat-exchanged to 260°C and enter the dechlorination reactor with a stirring device for dechlorination reaction; then enter the heat exchanger and are heat-exchanged After reaching 270°C, it enters the hydrogen catalytic thermal decomposition reactor and stays at 270°C for 120 minutes; the waste lubricating oil after hydrogen catalytic thermal decomposition enters the heat exchanger and is heat exchanged to 210°C, then enters the atmospheric pressure flash tower to remove moisture and light oil; the raw material after removing moisture and light oil is heat-exchanged to 80°C, and then pumped up to 5.5MPa to enter the propane refining unit, additives in waste lubricating oil and condensation products, colloids, colloids, etc. Asphaltenes, metal salts produced by organic acid corrosion of metals, and other mechanical ...

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Abstract

The invention provides a pretreatment process for regenerating high-quality base oil by using waste lubricating oil. The process comprises the steps of chemical reaction dechlorination, hydrocatalyticthermal decomposition, atmospheric flashing, propane refining and NMP or furfural extraction. The chemical reaction dechlorination solves the problems of corrosion, pipeline blockage, catalyst poisoning and the like caused by organic chlorine to a reaction device in the regeneration process by using the waste lubricating oil. The hydrocatalytic thermal decomposition destroys metal-salt additivesin the waste lubricating oil and solves the problem of difficult separation during solvent refining. The waste lubricating oil is subjected to atmospheric flashing, water and light fuel oil are removed, then topped residual oil is subjected to propane refining, additives, metal salt, oxidized condensate, colloid, asphaltene and other impurities in the waste lubricating oil are removed, and the ashcontent can be reduced to 0.02% or below. NMP or furfural is a solvent with high selectivity and low solubility, by utilizing the property, refined oil with less metal, carbon residues, colloid and aromatic hydrocarbon can be obtained, and high-quality raw materials are provided for hydrogenation.

Description

technical field [0001] The invention belongs to the fields of waste lubricating oil regeneration and petrochemical industry, and relates to a pretreatment process for regenerating high-quality base oil from waste lubricating oil. Background technique [0002] With the rapid growth of construction machinery, electric power, automobile, steel, shipbuilding, machine tool and other industries and the continuous improvement of equipment technology, the sharp increase in demand for lubricating oil and the limited oil reserves in the world have caused a sharp rise in the price of petroleum products. Therefore, In the case of rising international crude oil prices year by year, it is no longer advisable to use waste lubricating oil as fuel oil in the past. On the contrary, recycling the undeteriorated base oil in waste lubricating oil is conducive to protecting the environment and reducing pollution , can also promote the healthy development of the environmental protection industry. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M175/00
CPCC10M175/00C10M175/0016C10M175/0033C10M175/0041C10M175/005
Inventor 张先茂王栋斌王泽王国兴吴阳春周正夏大寒王瑜
Owner 湖北科润石化科技有限公司
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