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Hydrogenation regeneration method for waste lubricating oil

A waste lubricating oil, hydrogenation regeneration technology, applied in the direction of lubricating composition, hydrogenation treatment process, chemical instrument and method, etc. Blockage and other problems, to achieve the effect of weakening capillary pressure, long operation cycle and high utilization rate

Active Publication Date: 2020-11-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN1132922C discloses a combined process method for recycling waste lubricating oil, which uses the original metal chips and compounds in waste lubricating oil as catalysts to directly carry out hydrogenation treatment on waste oil, that is, through simple filtration, distillation, fixed bed hydrofining Separation of light components and products to obtain product regeneration base oil and by-product light oil, but this method cannot effectively remove impurities such as S and N in waste lubricating oil
[0006] Due to the different sources of waste lubricating oil, the impurities and composition of waste lubricating oil are relatively complex, and the distillation-hydrogenation technology route has problems such as easy blockage and corrosion of the device

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of hydrorefining catalyst: ①Weigh 500g of pseudo-boehmite, add 10g of fennel powder, 15g of methyl cellulose, and 15g of acetic acid, mix well, add appropriate amount of deionized water, and knead at room temperature to form. After molding, it was dried at 120°C for 4 hours and calcined at 650°C for 4 hours to obtain a carrier with a specific surface area of ​​361m 2 / g, the pore volume is 0.93mL / g, and the average pore diameter is 10.4nm. ②Weigh 200g of the catalyst carrier prepared in step (1), spray and soak it with 200mL of Span-80 ethanol solution with a concentration of 0.5g / 100mL, and then vacuum-dry it at 50°C for 5 hours; ③Add ammonium molybdate and nickel nitrate and phosphoric acid are dissolved in water, and then sodium polymethacrylate is added to obtain an impregnation solution, in which the content of molybdenum oxide is 48.7g / 100mL, the content of nickel oxide is 9.4g / 100mL, and the content of phosphorus is 2.1g / 100mL. The content of sodium ...

Embodiment 2

[0044] In the preparation process of the hydrorefining catalyst, the others are the same as in Example 1, except that the content of sodium polymethacrylate in the impregnation solution prepared in step 3 is 1.5g / 100mL in terms of carboxylate, and the soaking time is 3 hours to obtain the hydrorefining catalyst b. The properties of the hydrotreating catalyst B are as follows: the specific surface area is 203m 2 / g, pore volume is 0.54 mL / g, average pore diameter is 8.5nm, active metal dispersion I Mo / I Al is 0.1935, I Ni / I Al is 0.0868, and the composition of hydrorefining catalyst B is as follows by mass: the content of molybdenum oxide is 19.6wt%, the content of nickel oxide is 5.0wt%, and the content of phosphorus is 1.8wt%.

Embodiment 3

[0046] (1) Atmospheric and vacuum distillation of the pretreated raw material waste lubricating oil, and cut out the fraction at 350°C to 450°C. Among them, the sedimentation method is used for pretreatment to filter out solid particles above 25 μm in the waste lubricating oil.

[0047] (2) Put the distilled lubricating oil distillate in step (1) into the protective agent reactor for reaction, wherein the loading volume ratio of γ-alumina and hydrogenation protective agent in the protective agent reactor is 1:1, and the γ-oxidation Aluminum has a specific surface area of ​​330 m 2 / g. The molybdenum oxide content in the hydrogenation protection agent is 5.2wt%, the nickel oxide content is 1.2wt%, the pore volume is 0.76 mL / g, the average particle diameter is 3mm, and it is in the shape of a toothed ball. The protective agent reactor adopts an upflow type, and its operating conditions are: reaction temperature 290°C, pressure 7.0MPa, liquid hourly volume space velocity 1.0h ...

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Abstract

The invention discloses a hydrogenation regeneration method for waste lubricating oil. The method comprises the following steps: (1) distilling a pretreated raw material, namely waste lubricating oil;(2) feeding a lubricating oil fraction evaporated in the step (1) into a protective agent reactor for a reaction; and (3) feeding a product obtained after the reaction in the step (2) into a hydrogenation reactor filled with a hydrofining catalyst, and carrying out reacting to obtain lubricating oil base oil. The waste lubricating oil treated by the method can be used for producing standard lubricating oil base oil.

Description

technical field [0001] The invention relates to a method for regenerating waste lubricating oil, in particular to a method for hydrogenating and regenerating waste lubricating oil. Background technique [0002] China is a big consumer of lubricating oil. The service life of various lubricating oils is different, and they must be replaced after a certain period of time. Used lubricating oil with reduced lubricating performance is technically called waste lubricating oil. A large amount of waste lubricating oil produced every year, if discarded, will cause soil and water pollution; if used as furnace fuel, the flue gas will contain heavy metal oxides and polycyclic aromatic hydrocarbon oxides produced by incomplete combustion. The waste lubricating oil is treated properly to remove impurities and foreign pollutants, and then becomes recycled lubricating oil. It is a suitable choice from the perspectives of technology, environmental protection, resource utilization and economy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02C10M175/00B01J27/19
CPCB01J27/19C10G67/02C10G2300/1007C10G2300/201C10G2300/202C10G2300/205C10G2300/70C10G2400/10C10M175/0033C10M175/0041
Inventor 刘文洁袁胜华张皓段日张艳侠
Owner CHINA PETROLEUM & CHEM CORP
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