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Environmental protection regeneration method of waste lubricating oil

A kind of waste lubricating oil, environmental protection technology, applied in the direction of lubricating composition, etc., can solve the problem that the recycled oil is not effectively used, can not produce high-quality base oil, etc., achieve good industrial application value, good waste oil regeneration treatment method, simple and convenient The effect of secondary pollution

Active Publication Date: 2018-04-06
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, high-quality base oil cannot be produced from regenerated heavy oil obtained from waste oil containing much used engine oil by the conventional method, so the regenerated oil has not been effectively utilized

Method used

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  • Environmental protection regeneration method of waste lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1. Add 5 grams of sedimentation agent sodium silicate and 0.5 grams of demulsifier polyethylene polyamine to 500 grams of waste lubricating oil, and keep the temperature at 60° C. and asphaltenes for sedimentation, the sedimentation time is 7h;

[0022] Step 2, after the settling is over, take the upper oil phase, add 3 grams of toluenesulfonic acid and 15 grams of coconut shell activated carbon, and carry out further deacidification and decolorization at 60 ° C for 3 hours;

[0023] Step 3, centrifuging or filtering the decolorized oil product to remove the decolorizing agent.

[0024] Step 4, the filtered oil is subjected to vacuum distillation, the negative pressure is not greater than -0.8Mpa, and the temperature is 150°C to remove the light components to obtain the regenerated finished base oil.

Embodiment 2

[0026] Step 1. Add 6 grams of sedimentation agent sodium silicate and 0.6 grams of demulsifier polyethylene polyamine to 500 grams of waste lubricating oil, and keep the temperature at 65° C. and asphaltenes for sedimentation, the sedimentation time is 7h.

[0027] Step 2. After the settling is over, take the upper oil phase, add 3.5 grams of toluenesulfonic acid and 15 grams of coconut shell activated carbon, and carry out further deacidification and decolorization at 60 ° C for 3 hours;

[0028] Step 3, centrifuging or filtering the decolorized oil product to remove the decolorizing agent.

[0029] Step 4. The filtered oil product is subjected to vacuum distillation, the negative pressure is not greater than -0.8Mpa, and the temperature is 155°C to remove light components to obtain the regenerated finished base oil.

Embodiment 3

[0031] Step 1, add 6 grams of sedimentation agent sodium silicate and 1 gram of demulsifier polyethylene polyamine in 500 grams of waste lubricating oil, and keep the constant temperature at 75 ° C to remove additives, metal ions, and macromolecular colloids in the waste lubricating oil. and asphaltenes for sedimentation, the sedimentation time is 12h;

[0032] Step 2, after the settling is over, take the upper oil phase, add 4 grams of toluenesulfonic acid and 25 grams of shell activated carbon, and carry out further deacidification and decolorization at 65 ° C for 5 hours;

[0033] Step 3, centrifuging or filtering the decolorized oil product to remove the decolorizing agent.

[0034] Step 4, the filtered oil is subjected to vacuum distillation, the negative pressure is at -0.9Mpa, and the temperature is 158°C to remove the light components to obtain the regenerated finished base oil.

[0035]

[0036] It can be seen from the above table that the present invention is use...

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Abstract

A waste lubricating oil environment-friendly regeneration method comprises the following steps: step 1, adding a settling agent and a demulsifier in waste lubricating oil, and under a condition of the constant temperature of 50-80 DEG C, settling additives, metal ions, macromolecular colloids and asphaltene in the waste lubricating oil with the settling time of 6-48 h; step 2, after the settlement is finished, taking an upper-layer oil phase, adding 0.5-4 mass% of toluenesulfonic acid and 3-8 mass% of activated carbon, and further deacidifying and decoloring under a condition of the temperature of 50-80 DEG C with the time of 3-5 h; step 3, carrying out centrifugal separation or filtration on the decolored oil product, to remove a decolorizer; and step 4, carrying out reduced pressure distillation on the filtered oil product with the negative pressure of not more than -0.8 MPa, removing light components at the temperature of 150-160 DEG C, distilling until a flashing point is more than 180 DEG C, and thus obtaining the regenerated finished product base oil. The method has the characteristics of environment-friendly and simple process method.

Description

technical field [0001] The invention belongs to the technical field of waste recycling, and in particular relates to an environmentally friendly regeneration method from waste lubricating oil. Background technique [0002] In recent years, from the viewpoint of effective utilization of resources and environmental protection, promotion of proper disposal and reuse of wastes is a hot spot and focus issue in the field of environmental protection. [0003] At present, the treatment of waste lubricating oil is generally carried out by sulfuric acid treatment and clay treatment. The treatment method can include, for example, after pretreatment, water and floating garbage in the waste oil are removed, concentrated sulfuric acid or alkali is added to stand still, and the slag is separated by centrifugation or sedimentation. A method in which white clay is added to the remaining acidic waste oil, heat-treated to decolorize it, and then the light oil is further removed by vacuum dist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M175/00
CPCC10M175/00C10M175/0033C10M175/0058
Inventor 陈世军田永宏王硕蔡迪宗
Owner XI'AN PETROLEUM UNIVERSITY