Process for preparing lubricating oil base oil through hydrogenation regeneration of waste lubricating oil

A technology for lubricating oil base oil and hydrogenation regeneration, which is applied in the fields of hydrotreating process, petroleum industry, lubricating composition, etc., can solve the problems of poor light stability of the regenerated base oil, inability to operate the device for a long period of time, catalyst poisoning, etc. Anti-coking ability, inhibition of grain growth, effect of increasing total acid content

Pending Publication Date: 2022-02-25
湖北科润石化科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a process for preparing lubricating oil base oil by hydrogenation and regeneration of waste lubricating oil, which can effectively remove emulsified water and chlorine in waste lubricating oil, protect subsequent hydrofining and hydrogenation depreciation catalysts, and ensure long-term operation of the device. Periodic continuous operation solves the problems of device corrosion, pipeline blockage and catalyst poisoning caused by chlorine pollution in the past, which caused the problem that the device cannot be operated for a long time; at the same time, the removal of condensed ring aromatics can effectively remove the lubricating oil base through non-hydrogenation means The polycyclic aromatic hydrocarbons in the oil solve the problem of poor light stability of the regenerated base oil, improve the low-temperature fluidity and viscosity index of the regenerated base oil, and produce high-quality base oils that meet the quality standards of APIⅠⅡ / Ⅲ lubricating oil base oils

Method used

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  • Process for preparing lubricating oil base oil through hydrogenation regeneration of waste lubricating oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The raw material waste lubricating oil (see Table 1 for properties) first passes through the mechanical filtration device 1 to filter out large particles of impurities and remove most of the water in the raw material; 2-CaO-Al 2 o 3 Catalysts enter ebullating bed reactor 2 separately, in CO 2 content is N 2 In 20% gas by mass, the catalyst loading is 60% of the reactor volume, the reaction temperature is 160°C, and the volume space velocity is 7.0h -1 , under the condition of a pressure of 0.6MPa, a small amount of emulsified water and Cl in the waste lubricating oil are removed through the action of a catalyst; after dehydration and dechlorination, the lubricating oil enters the hydrofining reactor 3 under pressure, and the catalyst on the upper layer of the reactor is Ni-Mo-W -Ce / Al 2 o 3 The lower catalyst is Ni-Mo-P-La / Al 2 o 3 , at a reaction temperature of 320°C, a pressure of 8.0MPa, a volume ratio of hydrogen to oil of 300:1, and a liquid volume space vel...

Embodiment 2

[0031] The raw material waste lubricating oil (see Table 1 for properties) first passes through the mechanical filtration device 1 to filter out large particles of impurities and remove most of the water in the raw material; 2 -CaO-Al 2 o 3 Catalysts enter the ebullating bed reactor 2 respectively, under N 2 In the atmosphere, the catalyst loading is 78% of the reactor volume, the reaction temperature is 40°C, and the volume space velocity is 2.0h -1 , under the condition of a pressure of 0.2MPa, a small amount of emulsified water and Cl in the waste lubricating oil are removed through the action of a catalyst; after dehydration and dechlorination, the lubricating oil is pressurized and enters the hydrofining reactor 3, and the catalysts in the upper and lower layers of the reactor are Ni-Mo -P-La / Al 2 o 3 , at a reaction temperature of 280°C, a pressure of 3.0MPa, a volume ratio of hydrogen to oil of 100:1, and a liquid volume space velocity of 0.8h -1 Under the conditio...

Embodiment 3

[0033] The raw material waste lubricating oil (see Table 1 for properties) first passes through the mechanical filtration device 1 to filter out large particles of impurities and remove most of the water in the raw material; 2 -CaO-Al 2 o 3 Catalysts enter ebullating bed reactor 2 separately, in CO 2 content is N 2 In 10% gas by mass, the catalyst loading is 69% of the reactor volume, the reaction temperature is 300°C, and the volume space velocity is 10.0h -1 , under the condition of a pressure of 1.0MPa, a small amount of emulsified water and Cl in the waste lubricating oil are removed by the action of a catalyst; after dehydration and dechlorination, the lubricating oil enters the hydrofining reactor 3 under pressure, and the catalyst on the upper layer of the reactor is Ni-Mo-P -La / Al 2 o 3 The lower catalyst is Ni-Mo-W-Ce / Al 2 o 3 , at a reaction temperature of 360°C, a pressure of 5.0MPa, a hydrogen-oil volume ratio of 200:1, and a liquid volume space velocity of ...

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Abstract

The invention relates to a process for preparing lubricating oil base oil through hydrogenation regeneration of waste lubricating oil. The process comprises the following steps: mechanical filtration, boiling bed refined water removal and Cl removal, hydrofining, polycyclic aromatic hydrocarbon removal, hydrogenation pour point depression and distillation separation. Raw materials are subjected to mechanical filtration and coarse impurity removal, then enter a fluidized bed reactor to be subjected to fine dehydration and Cl removal, olefin, S, N and other impurities in lubricating oil are removed through a hydrofining reactor, fractionation is carried out to obtain lubricating oil base oil, and the refined lubricating oil base oil passes through a polycyclic aromatic hydrocarbon removal device and finally enters a hydrogenation pour point depressing reactor to be subjected to hydrogenation pour point depressing treatment, so that the added value of the product is further improved. The production process can be continuously operated for a long period, is environment-friendly and pollution-free, has a waste oil regeneration recovery rate of more than 95%, and can obviously improve the added value of products and increase economic benefits.

Description

technical field [0001] The invention relates to the field of waste lubricating oil regeneration, and belongs to an environmentally friendly, pollution-free and high-yield waste lubricating oil regeneration process technology. Background technique [0002] Lubricating oil is a product with high added value extracted from petroleum or artificially synthesized. The output of lubricating oil in my country accounts for about 2% of the total petroleum products. After the lubricating oil is used for a period of time, due to physical, chemical or human factors, the performance of the lubricating oil deteriorates, and pollutants such as aldehydes, ketones, resins, asphalt colloidal substances, carbon black and organic acids, salts, water, and metal chips are generated. , can no longer be used and become waste lubricating oil. However, a large amount of valuable lubricating oil base oil in waste lubricating oil has not aged and deteriorated. Therefore, the recycling and utilization o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14C10M175/00C10M175/02
CPCC10G67/14C10M175/00C10M175/02C10M175/0033C10M175/0041C10M175/0016C10M175/005C10G2300/1007C10G2300/201C10G2300/70
Inventor 张先茂夏大寒王泽王国兴郑敏王栋斌郑峰伟周正陈凯赵志杰王瑜王俊杰
Owner 湖北科润石化科技有限公司
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