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Two-way solvent extraction method of regenerated base oil

A technology for regenerating base oil and bidirectional solvent, which is applied in the multi-stage series refining process treatment, lubricating composition, etc., can solve the problems of harm to people and the environment, poor sedimentation and separation effect of base oil, and weak solubility, etc. The effect of less harm to people and the environment, omitting the refining process of clay, and good environmental performance

Inactive Publication Date: 2014-12-03
ANHUI GUOFU LUBRICANT IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, furfural extraction has the following disadvantages: strong solubility for non-ideal components with strong polarity in distillate oil, but weak solubility for ideal components with weak polarity, which affects the extraction and purification effect; non-ideal components with high density during extraction In the lower layer, the density of furfural is also relatively large, so the base oil in the lower layer has a poor sedimentation and separation effect, which affects the yield of regenerated base oil; emulsification is easy to occur during furfural extraction, and separation is difficult; the oil-to-solvent ratio of furfural extraction is high and the solvent Recycling consumes a lot of energy; furfural has certain toxicity, which is harmful to people and the environment, and can no longer meet the requirements of environmental protection
In addition, supplementary refining with white clay not only reduces the yield of recycled base oil, but also waste white clay will cause serious harm to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Put the collected waste lubricating oil into the storage tank, and place it at room temperature for 48 hours, so that the metal debris, moisture and other solid impurities in it will settle at the bottom of the tank and be separated;

[0029] (2) The waste lubricating oil after settling and removing impurities is pumped into a distillation tower with an absolute pressure of 1.2kPa and 230°C to carry out one-stage vacuum distillation to separate steam and diesel oil;

[0030] (3) The material after the primary vacuum distillation is pumped into a distillation tower with an absolute pressure of 0.7kPa and 320°C for secondary vacuum distillation to separate distillate oil and distillation raffinate;

[0031] (4) Extract 700 liters of N-methylpyrrolidone and 300 liters of mixed alcohol from each storage tank through a corrosion-resistant metering pump and pump them into the temporary storage tank, mix evenly, and the mixed alcohol contains 100 liters of butanol and 200 l...

Embodiment 2

[0037] (1) Put the collected waste lubricating oil into the storage tank, and place it at room temperature for 48 hours, so that the metal debris, moisture and other solid impurities in it will settle at the bottom of the tank and be separated;

[0038] (2) The waste lubricating oil after settling and removing impurities is pumped into a distillation tower with an absolute pressure of 1.5kPa and 240°C to carry out one-stage vacuum distillation to separate steam and diesel oil;

[0039] (3) The material after the primary vacuum distillation is pumped into a distillation tower with an absolute pressure of 1.0kPa and 330°C for secondary vacuum distillation to separate distillate oil and distillation raffinate;

[0040] (4) Extract 700 liters of N-methylpyrrolidone and 300 liters of mixed alcohol from each storage tank through a corrosion-resistant metering pump and pump them into the temporary storage tank, mix evenly, and the mixed alcohol contains 100 liters of butanol and 200 l...

Embodiment 3

[0046] (1) Put the collected waste lubricating oil into the storage tank, and place it at room temperature for 48 hours, so that the metal debris, moisture and other solid impurities in it will settle at the bottom of the tank and be separated;

[0047] (2) The waste lubricating oil after settling and removing impurities is pumped into a distillation tower with an absolute pressure of 1.2kPa and 230°C to carry out one-stage vacuum distillation to separate steam and diesel oil;

[0048] (3) The material after the primary vacuum distillation is pumped into a distillation tower with an absolute pressure of 0.7kPa and 330°C for secondary vacuum distillation to separate distillate oil and distillation raffinate;

[0049] (4) Pump 900 liters of N-methylpyrrolidone and 100 liters of mixed alcohol from each storage tank through a corrosion-resistant metering pump and pump them into the temporary storage tank, mix evenly, and the mixed alcohol contains 50 liters of butanol and 50 liters...

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Abstract

The invention relates to a two-way solvent extraction method of regenerated base oil. The method comprises the following steps: extracting distillate oil separated from waste lubrication oil in a two-stage reduced pressure distillation manner by virtue of a mixed solvent composed of N-methyl-2-pyrrolidone, butyl alcohol and amyl alcohol; further carrying out reduced pressure distillation on raffinate oil after the extraction so as to separate out a mixed solvent and a regenerated base oil product; carrying out the reduced pressure distillation on an extracting liquid after the extraction so as to separate the mixed solvent and residues; recycling the mixed solvents. The method has the advantages of high extraction efficiency, good settlement separation effect and high base oil yield. In addition, the N-methyl-2-pyrrolidone is nearly harmless to a human body and an environment, so that the quality of refined oil is improved; a carclazyte refining process is omitted, so that the environment is prevented from being polluted by carclazyte slag, and the yield of the regenerated base oil is improved at the same time.

Description

(1) Technical field [0001] The invention relates to the technical field of solvent extraction and refining of regenerated base oil of waste lubricating oil, in particular to a two-way solvent extraction method of regenerated base oil. (2) Background technology [0002] Lubricating oils commonly used in transportation vehicles and mechanical equipment are made of about 95% base oil and 5% additives. Lubricating oil mainly plays the roles of lubrication, cooling, rust prevention, cleaning, sealing and buffering. Due to the influence of high temperature, friction, dust, moisture and other factors during use, it will gradually deteriorate and lose its application value, and must be replaced. The replaced lubricating oil is called waste lubricating oil. In fact, there are not many metamorphic components in waste lubricating oil. Using appropriate technology and equipment, these metamorphic components can be removed without destroying the composition and quality of the base oil,...

Claims

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Application Information

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IPC IPC(8): C10M175/02C10M175/00C10G53/06
Inventor 李书龙
Owner ANHUI GUOFU LUBRICANT IND
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