Reverse back extraction refining method for petroleum reduced pressure distillation distillate and application thereof

A refining method and technology of distillate oil, which is applied in the petroleum industry, processing hydrocarbon oil, hydrocarbon oil processing products, etc., can solve the problems of unreduced cost, complicated processing process, and a large amount of acid slag white clay, etc., and achieves good cost control and simple process , The effect of solving the waste discharge problem

Inactive Publication Date: 2016-03-23
李书龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The refining method adopted in the existing technology is to use white clay to filter after pickling, but such a process will not only produce a large amount of acid residue and waste white clay, but also the treatment process is complicated
Time-consuming, labor-intensive, serious pollution and cost can not be reduced
The same problem also exists in the refining process of waste lubricating oil vacuum distillation distillate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A reverse stripping and refining method for petroleum vacuum distillation distillate oil: it is characterized in that the steps are as follows:

[0020] Step 1, using NMP solvent to extract the distillate oil to obtain an extract and a raffinate. The volume ratio of distillate oil to NMP is 1:0.5. The amount of extraction solvent needs to be strictly controlled, and it cannot be used excessively because the solvent can be recycled; although the greater the amount of NMP, the lower the impurity content in the refined base oil, but the amount of the extracted liquid also increases, and the base oil also increases. It will partially dissolve with the extract, resulting in an increase in the amount of water used in step 3 and an increase in post-treatment costs. To sum up all items, the volume ratio of distillate oil to NMP is 1:0.5 to 1:2, which can take into account the quality and cost of oil products.

[0021] Step 2, distilling the raffinate to recover the dissolved ...

Embodiment 2

[0028] A method for reverse extraction and refining of petroleum vacuum distillation distillate oil, wherein the volume ratio of distillate oil and NMP in step 1 is 1:2, and the volume of water added in step 3 is 0.8 times the volume of distillate oil in step 1 . All the other are with embodiment 1.

Embodiment 3

[0030] A regeneration method for waste lubricating oil, characterized in that the steps are as follows:

[0031] Step 1, obtaining waste lubricating oil distillate oil and vacuum residue by vacuum distillation;

[0032] Step 2, use the reverse stripping and refining method of petroleum vacuum distillation distillate oil in embodiment 1 or 2 to process waste lubricating oil distillate oil to obtain refined regeneration base oil and separate out regeneration base oil;

[0033] Step 3, extract the vacuum residue with a mixed solvent of NMP and octane, the volume ratio of the mixed solvent to the vacuum residue is 1:2, wherein the volume ratio of NMP and octane in the mixed solvent is 1:3, extract After the liquid is distilled to recover the solvent, the residual oil regenerated base oil is obtained. After the raffinate is distilled to recover the solvent, the residue is used to prepare high-grade asphalt products, and the recovered octane and NMP are put back into the extraction ...

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Abstract

The invention discloses a reverse back extraction refining method for petroleum reduced pressure distillation distillate. Impurity compositions in the distillate are extracted through NMP to refine the distillate, based on the principle that the solubility of base oil in NMP changes along with the content of water in NMP, the base oil dissolved by NMP is reversely back-extracted, and then the base oil in the distillate is purified and efficiently recycled. Compared with the prior art, the method has the following advantages that the technology is simple, the use amount of a solvent can be greatly reduced, the recycling efficiency of the base oil is improved, and the quality of oil products can be flexibly adjusted according to the requirements of use fields and cost; cost control is good, and the profit rate is high; only one chemical solvent is used in the whole technological process, the chemical solvent can be recycled, cost can be effectively controlled, and the waste emission problem can be well solved.

Description

technical field [0001] The invention relates to the technical field of petroleum refining and refining, in particular to a reverse stripping and refining method for petroleum vacuum distillation distillate oil. Background technique [0002] In the atmospheric and vacuum section of the refinery, as far as the vacuum tower is concerned, the distillate at the top of the tower becomes the top oil, and the side line can be reduced by the first line, the second line, the third line, the fourth line, and the side line according to the process design. Reduce residual oil. Among them, the top reduction line and the first line reduction are relatively light, and can be used as raw materials for normal pressure back refining; the second and third lines can be used as raw materials for paraffin wax according to the design; the fourth line and bottom line can be used as feedstock for catalytic cracking, and can also be used as asphalt raw materials. The overhead and side and bottom pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/00C10M175/02
CPCC10G53/00C10G2300/1007C10G2300/1062C10G2300/1074C10G2400/10C10M175/02
Inventor 李书龙
Owner 李书龙
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