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Regeneration technology for molecular distillation treatment of spent lubrication oil

A technology of molecular distillation and waste lubricating oil, applied in lubricating compositions and other directions, can solve the problems of low output of lubricating oil, high investment cost, environmental pollution, etc., and achieve the effects of high regeneration efficiency, low operating cost and high yield

Inactive Publication Date: 2014-02-19
四川省德阳昌盛至轩石油化工厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this patent is that it needs to add a large amount of clay and hydrofining; it will produce "secondary pollution" substances such as acid slag and sulfur dioxide, which will pollute the environment and be troublesome to deal with; it will lead to high investment costs and the output of regenerated lubricating oil Low

Method used

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  • Regeneration technology for molecular distillation treatment of spent lubrication oil

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Comparison scheme
Effect test

Embodiment 1

[0023] A regeneration process for waste lubricating oil after molecular distillation treatment is characterized in that it comprises the following steps:

[0024] Pretreatment: first put the waste lubricating oil into the settling tank for sedimentation, then take the oily mixture in the upper layer and put it into the plate and frame filter for filtering to obtain the treatment liquid;

[0025] Flocculation: heat the treatment solution to 120°C, during the heating process, add one-fifth of the organic flocculant for every 20°C increase in temperature until the organic flocculant is added;

[0026] Rectification: After degassing and drying the treated liquid after flocculation, it is transferred to a rectification tower for rectification;

[0027] Molecular distillation: carry out multi-stage molecular distillation on the distilled lubricating oil again;

[0028] Membrane filtration: The lubricating oil after molecular distillation is subjected to membrane filtration to obtai...

Embodiment 2

[0034] A regeneration process for waste lubricating oil after molecular distillation treatment is characterized in that it comprises the following steps:

[0035] Pretreatment: first put the waste lubricating oil into the settling tank for sedimentation, then take the oily mixture in the upper layer and put it into the plate and frame filter for filtering to obtain the treatment liquid;

[0036] Flocculation: heat the treatment solution to 150°C, during the heating process, add one-fifth of the organic flocculant for every 20°C increase in temperature until the organic flocculant is added;

[0037] Rectification: After degassing and drying the treated liquid after flocculation, it is transferred to a rectification tower for rectification;

[0038] Molecular distillation: carry out multi-stage molecular distillation on the distilled lubricating oil again;

[0039] Membrane filtration: The lubricating oil after molecular distillation is subjected to membrane filtration to obtai...

Embodiment 3

[0045] A regeneration process for waste lubricating oil after molecular distillation treatment is characterized in that it comprises the following steps:

[0046] Pretreatment: first put the waste lubricating oil into the settling tank for sedimentation, then take the oily mixture in the upper layer and put it into the plate and frame filter for filtering to obtain the treatment liquid;

[0047] Flocculation: heat the treatment solution to 170°C, during the heating process, add one-fifth of the organic flocculant for every 20°C increase in temperature until the organic flocculant is added;

[0048] Rectification: After degassing and drying the treated liquid after flocculation, it is transferred to a rectification tower for rectification;

[0049] Molecular distillation: carry out multi-stage molecular distillation on the distilled lubricating oil again;

[0050] Membrane filtration: The lubricating oil after molecular distillation is subjected to membrane filtration to obtai...

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Abstract

The invention relates to a regeneration technology for the molecular distillation treatment of spent lubrication oil. The regeneration technology is characterized in that the regeneration technology comprises the following steps: preprocessing: after the spent lubrication oil is placed in a sedimentation tank for sedimentation, an upper oily mixture is obtained and placed in a plate and frame filter for filtering, so as to obtain a treatment fluid; flocculation: the treatment fluid is heated up to 120-170 DEG C, and during the heating, one fifth of an organic flocculant is added for every temperature rise of 20 DEG C until the organic flocculant is used up; rectification: the flocculated treatment fluid sequentially goes through degasification and drying, and is then transferred into a rectifying tower for rectification; molecular distillation: the rectified lubrication oil further goes through multistage molecular distillation; membrane filtration: the lubrication oil after the molecular distillation goes through membrane filtration to obtain base oil. The invention has the advantages of small investment scale, low operation costs, high quality of regenerated base oil products, high yield, energy conservation, environmental friendliness, high regeneration efficiency and safety, and prevents 'secondary pollution'.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a regeneration process of waste lubricating oil after molecular distillation treatment. Background technique [0002] In the field of petrochemical industry, with the rapid development of economy and technology at home and abroad, the performance requirements of lubricating oil products are also improved; and in the blending process of lubricating oil, it is often necessary to add one or more additives to improve the specific performance of lubricating oil , and then the purpose of blending is to improve the type and quality of lubricating oil, so as to obtain the lubricating oil ultimately required by customers. [0003] At present, a large amount of white clay and hydrofining are required to be added to the recycling process of waste lubricating oil at home and abroad; acid slag, sulfur dioxide and other "secondary pollution" substances will be produced, polluting the envi...

Claims

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Application Information

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IPC IPC(8): C10M175/00
Inventor 周昌国
Owner 四川省德阳昌盛至轩石油化工厂
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