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A combined process method for regenerating waste lubricating oil through heat treatment

A technology of waste lubricating oil and combined process, which is applied in the direction of lubricating compositions, etc., can solve the problems of poor product properties and difficult removal, and achieve the effects of improving product color, increasing product yield, and reducing costs

Inactive Publication Date: 2019-04-09
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a combined process method for regenerating waste lubricating oil through heat treatment, which solves the problems of difficult removal of non-excellent components such as metals and polar substances in the raw materials of waste lubricating oil, poor product properties, etc., and improves the Yield and properties of lubricating oil fractions

Method used

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  • A combined process method for regenerating waste lubricating oil through heat treatment
  • A combined process method for regenerating waste lubricating oil through heat treatment
  • A combined process method for regenerating waste lubricating oil through heat treatment

Examples

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Embodiment 1

[0046] This embodiment provides a combined process method for regenerating waste lubricating oil through heat treatment, including the following steps:

[0047](1) Heat treatment: The waste lubricating oil raw material enters the heat treatment reactor for shallow thermal cracking reaction. The temperature is 360°C, normal pressure, and the reaction time is 60 minutes. The material at the bottom of the device enters the oil agent mixing unit;

[0048] (2) Oil agent mixing: the heat treatment reactor bottom material is mixed with 120# solvent oil from the solvent storage tank in a static mixer, and the mass ratio of 120# solvent oil and heat treatment reactor bottom material mixing is 1:1. The temperature is 30°C, the mixing time is 2 hours, and the mixed material enters the centrifugal unit;

[0049] (3) Centrifugation: The mixed material from the static mixer enters the butterfly centrifuge, and the centrifugal raffinate containing most of the metals and polar components is ...

Embodiment 2

[0062] This embodiment provides a combined process method for regenerating waste lubricating oil through heat treatment, including the following steps:

[0063] (1) Heat treatment: The raw material of waste lubricating oil enters the heat treatment reactor for shallow thermal cracking reaction. The temperature is 350°C, normal pressure, and the reaction time is 90 minutes. The material at the bottom of the device enters the oil agent mixing unit;

[0064] (2) Oil agent mixing: the heat treatment reactor bottom material is mixed with 120# solvent oil from the solvent storage tank in a static mixer, and the mass ratio of 120# solvent oil and heat treatment reactor bottom material mixing is 3:1. The temperature is 20°C, the mixing time is 3h, and the mixed material enters the centrifugal unit;

[0065] (3) Centrifugation: The mixed material from the static mixer enters the butterfly centrifuge, and the centrifugal raffinate containing most of the metals and polar components is t...

Embodiment 3

[0078] This embodiment provides a combined process method for regenerating waste lubricating oil through heat treatment, including the following steps:

[0079] (1) Heat treatment: The waste lubricating oil raw material enters the heat treatment reactor for shallow thermal cracking reaction. The temperature is 400°C, normal pressure, and the reaction time is 30 minutes. The material at the bottom of the device enters the oil agent mixing unit;

[0080] (2) Oil agent mixing: the bottom material of the heat treatment reactor is mixed with 120# solvent oil from the solvent storage tank in a static mixer, and the mass ratio of 120# solvent oil and the bottom material of the heat treatment reactor is 0.8:1. The temperature is 60°C, the mixing time is 1h, and the mixed material enters the centrifugal unit;

[0081] (3) Centrifugation: The mixed material from the static mixer enters the butterfly centrifuge, and the centrifugal raffinate containing most of the metals and polar compo...

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Abstract

The invention discloses a combined technological method for recycling waste lubricating oil by means of heat treatment. The combined technological method includes steps of carrying out heat treatment on the waste lubricating oil which is a raw material, to be more specific, feeding the waste lubricating oil in a heat treatment reactor, carrying out shallow-degree heat cracking reaction on the waste lubricating oil and feeding materials at the bottom of the heat treatment reactor into an oil mixing unit; mixing oil and NO.120 solvent oil with each other; centrifuging the oil and the NO.120 solvent oil; carrying out steam stripping; carrying out membrane separation; carrying out normal-pressure fractionation, to be more specific, recycling the NO.120 solvent oil from a tower roof, acquiring fractions at the temperatures lower than 300 DEG C from side lines, acquiring crude lubricating oil from a tower bottom and feeding the crude lubricating oil in a reduced-pressure fractionating tower; carrying out reduced-pressure fractionation, to be more specific, jointly dividing the crude lubricating oil into four fractions at tower side lines and a tower bottom, respectively feeding the four fractions into clay mixers, carrying out clay refining on the fractions to obtain four lubricating oil products including first-subtracted refined oil, second-subtracted refine oil, third-subtracted refined oil and substrate-subtracted refined oil. The fractions obtained at the step of normal-pressure fractionation can be used as marine diesel oil products. The combined technological method has the advantages that non-quality components such as metal and polar substances in the waste lubricating oil are easy to remove by the aid of the combined technological method which is a heat treatment method, the fractions of lubricating oil are high in yield, and base oil products of the lubricating oil are excellent in quality.

Description

technical field [0001] The invention relates to the technical field of oil upgrading technology in petroleum processing technology, in particular to a combined process method for regenerating waste lubricating oil through heat treatment. Background technique [0002] With the development of my country's machinery industry, the demand for lubricating oil continues to increase, and lubricating oil is used under high temperature and high pressure conditions, and its composition, structure and performance have undergone significant changes. At the same time, it is affected by corrosion and mechanical wear and the amount of lubricating oil additives. Continuously increasing, after the use of lubricating oil, a kind of dark waste lubricating oil with high aromatic content, high residual carbon value, many insolubles, large metal content and many polar residues is formed. The annual output of this kind of waste lubricating oil in my country reaches 15 million more than tons. This ki...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M175/00
CPCC10M175/00C10M175/0025
Inventor 邓文安李传吴波李庶峰杜峰谢海华崔敏
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)