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Regeneration method for waste lubricating oil

A technology for waste lubricating oil and lubricating oil, applied in the direction of lubricating composition, etc., can solve the problems of high investment of waste lubricating oil regeneration device and insufficient technology, and achieve good oxidation stability, flexible process technology route and small color number. Effect

Inactive Publication Date: 2007-09-12
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The present invention provides a new waste lubricating oil regeneration method in order to rationally utilize limited petroleum resources, solve the problems of insufficient technology in the regeneration process of waste lubricating oil and high investment in waste lubricating oil regeneration equipment, etc.

Method used

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  • Regeneration method for waste lubricating oil

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Effect test

Embodiment 1

[0042] The properties of waste lubricating oil A are shown in Table 1. 100 parts of the waste lubricating oil were naturally settled, and then 150 parts of No. 120 solvent oil were added, and the uniformly diluted mixed oil sample was heated to 50° C. and centrifuged to further separate mechanical impurities in the oil.

[0043] The mixed oil sample from which mechanical impurities have been separated is heated to 230°C under normal pressure distillation to distill out the gasoline fraction (including diluent) at 450℃ distillate heating After the first short-path distillation (falling film) to 280°C, the fraction of 450°C to 520°C is cut under the condition of residual pressure of 40Pa (as the production raw material oil of 350SN); Distillation (falling film), under the condition of residual pressure of 6.5Pa, cut out 520 ℃ ~ 580 ℃ fraction (as 650SN production raw material oil), > 580 ℃ residual oil as heavy fuel oil.

[0044] 300°C~370°C fraction, 370°C~450°C fraction, 450°...

Embodiment 2

[0051] The properties of waste lubricating oil B are shown in Table 4. 100 parts of waste lubricating oil B were naturally settled, then 200 parts of No. 200 solvent oil were added, and 1.5 parts of organic flocculant polyether was added at the same time, the mixed oil sample was heated to 70 ° C, stirred for 30 minutes, settled for 1 hour, and further separated by centrifugation Mechanical impurities in oil. The mixed oil sample from which mechanical impurities have been separated is heated to 230°C under normal pressure to distill the gasoline fraction (including diluent) 200°C is heated under the condition of residual pressure of 5KPa, A proper amount of water vapor is blown into the bottom of the pressure tower to distill out the distillate at 200°C to 370°C (as light fuel oil); the fraction >370°C is heated to 235°C and undergoes one-stage short-path distillation (falling film). Cut out 370℃~440℃ fraction under the condition (as raw material oil for 100SN production); >4...

Embodiment 3

[0056] The properties of waste lubricating oil C are shown in Table 6. The waste lubricating oil C is naturally settled to separate mechanical impurities, and then heated to 230°C under normal pressure to distill the gasoline fraction 200°C is heated to a residual pressure of 4Kpa and decompressed Under the condition of blowing an appropriate amount of water vapor into the bottom of the tower, distill out 200°C-370°C fraction (as light fuel oil) and 370°C-450°C fraction (as 100SN production raw material oil); >450°C fraction is heated to 268°C After one-stage short-path distillation (falling film), the fraction at 450°C to 500°C is cut under the condition of residual pressure of 50Pa (as raw material oil for the production of 150SN); Membrane), under the condition of residual pressure of 8Pa, cut out 500℃~540℃ fraction (as 350SN raw material oil), and >540℃ residual oil as heavy fuel oil.

[0057] 370℃~450℃ distillate, 450℃~500℃ distillate and 500℃~540℃ distillate were direct...

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Abstract

This invention discloses a regeneration mehod for waste lubricant including: settlementing waste lubricant naturally to remove water and mechanical impurities in it, when the content of mechanical impurities is lower than 0.08wt% or pentane undissolved substance is less than 0.30wt%, it is often decompressed and distilled directly, otherwise, a thinner 0-3.5 times of the total weight of the waste lubricant is added to be separated under 30-95deg.C then decompression and distillation are done to it later, then short time distillation and refining to the lubricant is carried out to get regenerated lubricant.

Description

technical field [0001] The invention belongs to the recycling of grease from waste materials, in particular to a regeneration method of waste lubricating oil. Background technique [0002] With the rapid growth of the national economy and the rapid development of the car industry, the domestic demand for lubricating oil is increasing. According to statistics, in 2005, about 5.5 million tons of lubricating oil were sold domestically. During the use of lubricating oil, it is cracked and condensed under high temperature, high pressure and other conditions; it is oxidized and deteriorated in contact with air, and under the catalysis of certain metals, the oxidation is intensified; at the same time, the decomposition and destruction of additives lose the original effect of additives ; and impurities such as light oil, dust and metal chips are mixed in from the outside, so that the lubricating oil loses some of its original properties, its performance becomes worse, and it cannot ...

Claims

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Application Information

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IPC IPC(8): C10M175/00
Inventor 黄新龙秦如意王洪彬胡艳芳齐文义赵志刚刘淑芳袁强
Owner CHINA PETROCHEMICAL CORP
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