Application of distillation and multi-stage molecular distillation technique in regeneration process for waste lubricant oil
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A technology of molecular distillation and waste lubricating oil, applied in hydrocarbon distillation, petroleum industry, lubricating composition, etc., to achieve the effects of stable operation, low distillation temperature and short material residence time
Inactive Publication Date: 2008-12-10
尹英遂 +2
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[0006] The purpose of the present invention is to overcome the deficiency of atmospheric distillation and regenerated waste lubricating oil, and make up for the defect that a single molecular distillation equipment can only distill a single product in a multi-stage form, so that the molecular distillation equipment can play a greater role in the regeneration of waste lubricating oil. effect
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Embodiment 1
[0034] A three-stage molecular distillation process for regeneration of waste lubricating oil base oil, the main process of which is described as follows:
[0035] a. The waste lubricating oil stored in the waste lubricating oil storage tank V101 after pretreatment and degassing and drying is pumped into the RC101 through the primary feed pump P102 for rectification, and the light diesel oil component is separated.
[0036] b. The light diesel oil is condensed by the condenser EX101 and then enters the material temporary storage tank V102.
[0037] c. The heavy components after rectification are pumped into the first-stage wiped film molecular still DZ101 through the first-stage feed pump P103.
[0038] The first-stage molecular still has a distillation temperature of 200°C, a vacuum of 80Pa, a distillation distillation range of 370-450°C, and a discharge volume of 27%. The viscosity and flash point meet the technical specifications of MVI100 base oil.
[0039] d. The light l...
Embodiment 2
[0054] A secondary molecular distillation process for regeneration of waste lubricating oil base oil, the main process of which is described as follows:
[0055] a. The waste lubricating oil stored in the waste lubricating oil storage tank V101 after pretreatment and degassing and drying is pumped into the RC101 through the primary feed pump P102 for rectification, and the light diesel oil component is separated.
[0056] b. The light diesel oil is condensed by the condenser EX101 and then enters the material temporary storage tank V102.
[0057] c. The heavy components after rectification are pumped into the first-stage wiped film molecular still DZ101 through the first-stage feed pump P103.
[0058] The first-stage molecular still has a distillation temperature of 210°C, a vacuum of 80Pa, a distillation distillation range of 370-440°C, and a discharge volume of 51%. The viscosity and flash point meet the technical specifications of MVI200 base oil.
[0059] d. The light lub...
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Abstract
The invention discloses a novel process of regenerating base oil from waste lubricating oil. The process which applies an advanced molecular distillation technology to regenerate base oil from waste lubricating oil can not only regenerate better base oil, but also carry out effluent fraction through multilevel series connections. The waste lubricating oil is deprived of light diesel oil in a rectification tower through pretreatment and deprivation of light components, and then the waste lubricating oil is pumped into a first-level molecular still through a first-level feed pump to distill off a relatively lighter base oil component as a product. Heavier components which are left by the first-level distillation and serves as the raw material of a second-level molecular still are pumped into the second-level molecular still through a second-level feed pump to distill off a component heavier than the first-level molecular distillation product to serve as a product, and the distillation residuals are taken as the raw material of a third-level distillation. The process is repeated in the manner until a required n level is reached, wherein n is more than or equal to 2 and is less than or equal to 5, and the recommended optimal level number is 3 or 2. The process has the advantages that: the obtained product only contains the base oil component, while other impurities including additives are discharged in the form of residuals; the process also can produce a plurality of products with good quality and varied viscosities, thereby bringing about great convenience for the preparation of product lubricating oil.
Description
technical field [0001] The invention relates to a new process for regenerating base oil from waste lubricating oil. The process applies advanced molecular distillation technology to the regeneration of waste oil regenerated base oil. Perform fraction cuts. Background technique [0002] Used waste lubricating oil contains oxidation, cracking, condensation products, mixed fuel oil, invalid additives and a large number of mechanical impurities, such as dust, metal shavings, smoke particles, etc. [0003] Molecular distillation technology is also called short-path distillation technology in the industry. It is a brand-new technology recently developed and can be used for the regeneration of waste lubricating oil. It has high distillation efficiency and good product quality. , low operating temperature, high vacuum, green and environmental protection. Applying molecular distillation technology to the regeneration of waste lubricating oil can effectively distill base oil from wa...
Claims
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