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A method for processing waste lubricating oil

A technology of waste lubricating oil and lubricating oil, which is applied in the treatment of hydrocarbon oil, lubricating composition, hydrocarbon oil treatment products, etc., can solve the problems of poor product properties and complicated treatment process, and achieve ease of conditions, low energy consumption, and improved products color effect

Inactive Publication Date: 2017-11-07
台州天天环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a method for treating waste lubricating oil, which solves the problems of complicated raw material treatment process and poor product properties of existing waste lubricating oil

Method used

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  • A method for processing waste lubricating oil
  • A method for processing waste lubricating oil
  • A method for processing waste lubricating oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment provides a method for processing waste lubricating oil, comprising the following steps:

[0039] (1) Solvent extraction: waste lubricating oil and 120# solvent oil are stirred and mixed, the mixing mass ratio of 120# solvent oil and waste lubricating oil is 2:1, the mixing temperature is 25°C, and the standing time is 3h. After standing and stratifying, The mixed oil enters the centrifugal unit;

[0040] (2) Centrifugation: The mixed oil enters the butterfly centrifuge, and the centrifuged raffinate containing polar components is thrown out. The centrifuged raffinate accounts for 4% of the mixed oil product, and 120# solvent oil in the centrifuged raffinate accounts for the centrifuged raffinate 12% of the centrifuge supernatant except centrifuge raffinate enters the membrane separation unit;

[0041] (3) The centrifugal supernatant enters the membrane module. The membrane element used is a nano-scale ceramic microfiltration membrane. The membran...

Embodiment 2

[0045] The present embodiment provides a method for processing waste lubricating oil, comprising the following steps:

[0046] (1) Solvent extraction: waste lubricating oil and 120# solvent oil are stirred and mixed, the mixing mass ratio of 120# solvent oil and waste lubricating oil is 1:1, the mixing temperature is 40°C, and the standing time is 4h. After standing and stratifying, The mixed oil enters the centrifugal unit;

[0047] (2) Centrifugation: The mixed oil enters the centrifuge, and the centrifuged raffinate containing polar components is thrown out. The centrifuged raffinate accounts for 3% of the mixed oil product, and 120# solvent oil in the centrifuged raffinate accounts for 15% of the centrifuged raffinate. %, the centrifuge liquid except the centrifuge raffinate enters the membrane separation unit;

[0048](3) The centrifugal supernatant enters the membrane module. The membrane element used is a nano-scale ceramic microfiltration membrane. The membrane separa...

Embodiment 3

[0052] The present embodiment provides a method for processing waste lubricating oil, comprising the following steps:

[0053] (1) Solvent extraction: waste lubricating oil and 120# solvent oil are stirred and mixed, the mixing mass ratio of 120# solvent oil and waste lubricating oil is 3:1, the mixing temperature is 10°C, and the standing time is 4h. After standing and stratifying, The mixed oil enters the centrifugal unit;

[0054] (2) Centrifugation: The mixed oil enters the centrifuge, and the centrifuged raffinate containing polar components is thrown out. The centrifuged raffinate accounts for 5% of the mixed oil product, and 120# solvent oil in the centrifuged raffinate accounts for 10% of the centrifuged raffinate. %, the centrifuge liquid except the centrifuge raffinate enters the membrane separation unit;

[0055] (3) The centrifugal supernatant enters the membrane module. The membrane element used is a nano-scale ceramic microfiltration membrane. The membrane separ...

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Abstract

The invention discloses a method for treating waste lubricating oil, and belongs to the technical field of oil product quality improving technologies among petroleum processing technologies.The method includes stirring and mixing the waste lubricating oil and No.120 solvent oil with each other, layering the waste lubricating oil and the No.120 solvent oil by means of standing to obtain mixed oil products; feeding the mixed oil products into a centrifugal machine, throwing out centrifugal residual liquid with polar components and feeding centrifugal clear liquid into a membrane separation unit; carrying out membrane separation to obtain post-membrane clear liquid with lubricating oil distillate and post-membrane concentrated liquid with the polar components; feeding the post-membrane clear liquid into a normal-pressure fractionating tower, recycling the No.120 solvent oil on a tower top, feeding the No.120 solvent oil back to a solvent storage tank, acquiring distillate at the temperature lower than 360 DEG C from lateral lines and acquiring crude lubricating oil from a tower bottom; feeding the crude lubricating oil acquired at the bottom of the normal-pressure fractionating tower into a clay refining tower and acquiring base lubricating oil at the bottom of the clay refining tower.The method has the advantages that non-high-quality components in the waste lubricating oil are removed by the aid of the physical and chemical method without changing composition and properties of waste lubricating oil raw materials, conditions are mild, the method is low in energy consumption, and the utilization rate of the waste lubricating oil raw materials can reach 100%.

Description

technical field [0001] The invention relates to the technical field of oil upgrading technology in petroleum processing technology, in particular to a method for treating waste lubricating oil. Background technique [0002] Lubricating oil is a layer of liquid material between mechanical parts to reduce friction and wear between the parts. Lubricating oil is mainly composed of base oil and chemical additives. [0003] In the process of use, the complex operating environment, the chemical and physical composition of used lubricating oil is different from that of fresh oil. Compared with fresh oil, used lubricating oil has high water content and sediment content (including dust, metal abrasive particles, carbon particles, colloids), high content of toxic oxides, high content of metal ions (such as Fe , Cd, Cr, Pb, etc.). In fact, "waste oil" in the traditional sense is not waste, and less than 10% of the waste lubricating oil has really deteriorated. [0004] Scientists at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/08C10M175/02C10M175/06
CPCC10G53/08C10G2300/1007C10G2300/201C10G2300/205C10G2400/04C10G2400/10C10M175/0033C10M175/005C10M175/0058C10M175/0083C10M175/02C10M175/06
Inventor 李传邓文安吴波崔敏李庶峰杜峰谢海华
Owner 台州天天环保科技有限公司
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