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Recovering and regenerating method for waste lubrication oil

A technology of waste lubricating oil and re-refining oil, which is applied in the direction of lubricating compositions, etc., which can solve the problems of difficult removal and regeneration, low yield of base oil, high inorganic reagents, etc., to improve the processing capacity and the yield of the device, and the process operation is simple Flexible, less harsh effects

Active Publication Date: 2010-12-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two processes have a certain similarity. They both remove and separate the metal, one of the main impurities, and hydrogenate the oil after demetallization, but the main disadvantages are that a large amount of solid waste and a large amount of acid are generated. Substances, difficult to remove and regenerate, and consume high-cost inorganic reagents, the yield of base oil is low
[0008] None of the existing waste lubricating oil recycling technologies can completely remove impurities such as metals in waste lubricating oil, neither propose an ideal environment-friendly recycling technology, nor improve the yield of lubricating oil base oil well.

Method used

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  • Recovering and regenerating method for waste lubrication oil
  • Recovering and regenerating method for waste lubrication oil
  • Recovering and regenerating method for waste lubrication oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take a sample of waste lubricating oil. Considering that this kind of waste lubricating oil may be oxidized, aged, and deteriorated during long-term use, and will produce impurities such as impurities, the mechanical insoluble matter and water content were measured first. The results are shown in the table 1.

[0026] Table 1 Determination of Mechanically Insoluble Matter and Water Content in Waste Lubricating Oil Samples

[0027]

[0028] It can be seen from Table 1 that the mechanically insoluble content of this waste lubricating oil sample is relatively high, reaching 0.2%; the water content is relatively high, reaching 3.0%, which shows that it must be strictly removed before choosing an effective recycling method Mechanical insoluble matter and dehydration treatment.

[0029] Using conventional filtration and dehydration operations, most of the mechanical impurities and water were removed, and the properties of the obtained waste lubricating oil are shown in Ta...

Embodiment 2～5

[0035]The content of metal impurities is an important factor affecting the hydrorefining of waste lubricating oil. Through appropriate distillation methods, especially by adding appropriate additives, the metal components can be concentrated in the residue, and the metal content of the obtained lubricating oil base oil is relatively low, which can meet the feed requirements of hydrofining. Example 2 does not use additives, Example 3 uses 2% additives (distillation range greater than 350 ° C catalytic cracking back to refining oil), embodiment 4 uses 5% additives (distillation range greater than 450 ° C catalytic cracking back refining oil), Example 5 uses 8% additives (distillation range greater than 370 ° C coal liquefied oil).

[0036] The sample was distilled, and the impurity content of each fraction after distillation is shown in Table 4.

[0037] Impurity content after table 4 distillation

[0038]

[0039] It can be seen from Table 4 that after proper distillation ...

Embodiment 6～7

[0041] The above-mentioned heavy components were subjected to hydrofinishing, and a hydrofinishing catalyst was used. The performance of the catalyst is shown in Table 6.

[0042] Table 6 Catalyst performance

[0043]

[0044] The specific process is: hydrofining heavy components, pressure 5MPa, temperature 310-320℃, hydrogen-oil ratio 800:1, space velocity 1.0h -1 , process conditions and product property data are shown in Table 7.

[0045] Table 7 process conditions and product properties

[0046]

[0047] It can be seen from Table 7 that the properties of the lubricating base oil after hydrofining treatment are better, all impurities are removed, S and N impurities are basically removed, and important indicators such as chroma, pour point, and flash point also passed.

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Abstract

The invention discloses a recovery and regeneration method for waste lubricating oil, which adopts the organic combination of processes such as filtration, dehydration, distillation, hydrorefining and so on, and optimizes operating conditions. Compared with the prior art, the method can effectively remove most impurities in the waste lubricating oil, improves characteristics such as pour point, chroma, oxidation stability, acid number and so on, simultaneously improves the yield of lubricant base oil, and realizes the recovery and the effective regeneration of the waste lubricating oil.

Description

technical field [0001] The invention relates to a recycling method for waste lubricating oil. Background technique [0002] Waste lubricating oil is oil that has obvious differences in quality indicators from new lubricating oil due to oxidation, aging, deterioration, mixing of fuel oil components, and mixing of impurity water during the use of lubricating oil. It is generally reflected in indicators such as viscosity, flash point, acid value, moisture, and color. [0003] Waste lubricating oil can be used to produce other products, such as cracking to produce light diesel and gasoline products, and can also be recycled as lubricating oil base oil after treatment. The waste lubricating oil is processed through appropriate processes to remove the metamorphic dirt and impurities in the waste oil, and produce a base oil that meets the quality requirements. After further production and deployment of various additives, a finished lubricating oil with good quality can be obtained...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M175/00
Inventor 刘建锟杨涛胡长禄蒋立敬贾永忠
Owner CHINA PETROLEUM & CHEM CORP
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