Method of removing sulfur and aromatic hydrocarbon from base oil regenerated from waste lubricating oil

A technology for regenerating base oils and waste lubricating oils, applied in lubricating compositions, the petroleum industry, and treating hydrocarbon oils, etc., can solve problems such as difficulty in setting up permits for safe operation, high investment costs, and poor results, without causing Effects of secondary pollution, improvement of operation safety, and reduction of chroma

Active Publication Date: 2015-04-29
张伟民 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former is not effective and will cause secondary pollution, so it has become a trend that it will be gradually eliminated.
And another method of hydrofining

Method used

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  • Method of removing sulfur and aromatic hydrocarbon from base oil regenerated from waste lubricating oil
  • Method of removing sulfur and aromatic hydrocarbon from base oil regenerated from waste lubricating oil
  • Method of removing sulfur and aromatic hydrocarbon from base oil regenerated from waste lubricating oil

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Example Embodiment

[0097] See Figure 1 to Figure 5 As shown, the preferred embodiment of the present invention includes a re-refined base oil extraction process (Re-refined base oil extraction process) 10, a re-refined base oil centrifugal separation process (High speed centrifuge separation process for re-refined base oil) 20, and a re-refined base oil The Re-refined base oil recovery process (Re-refined base oil recovery process) 30 and the Utility facility process (Utility facility process) 40 are described in detail below.

[0098] The regenerated base oil extraction process 10 is used for mixing the regenerated base oil and NMP (N-Methyl Pyrrolidinone) to perform an extraction process for desulfurization and aromatic removal.

[0099] The equipment used in the regenerated base oil extraction process 10 includes a regenerated base oil blending and heating tank 11, several material transfer pumps 12 / 13, an NMP storage tank 14 with an internal heater, and a centrifugal extraction machine (Centrifu...

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Abstract

The invention relates to a method of removing sulfur and aromatic hydrocarbon from base oil regenerated from waste lubricating oil. The method comprises the following steps of extraction, centrifugal separation, short-range distillation and public equipment based condensation. In the extraction step, the regenerated base oil is extracted by using N-methyl pyrrolidone (NMP) which serves as an extracting agent. Due to extraction, sulfur and aromatic hydrocarbon can be deeply removed, the chroma of the regenerated base oil can be decreased, the flash point, viscosity index and quality of the regenerated base oil can be increased, and the problem on the generation of waste pollutants of the traditional acidic clay based refining can be avoided. The short-range distillation and reclamation can be carried out under a low temperature and pressure work condition and has the characteristics of energy saving and improved operation security. In addition, the method further comprises the step of recycling of NMP through short-range distillation.

Description

technical field [0001] The present invention relates to a method for desulfurization and aromatic hydrocarbon removal of regenerated base oil, especially a method for desulfurization and aromatic hydrocarbon removal of regenerated base oil recovered from waste lubricating oil, and the present invention further also Contains methods for recovering extractant for recycling. Background technique [0002] As the price of crude oil continues to rise, the price of base oil, which is the raw material used to prepare lubricating oil, also continues to rise; and due to the small amount and preciousness, the average price of base oil is almost twice that of fuel oil. as much. At present, 90% of the source of base oil is still mineral base oil (Mineral Base Oil) obtained in the process of refining crude oil. Therefore, in the case of rising crude oil prices, it is no longer advisable to treat waste lubricating oil as recycled fuel oil in the past. Instead, the base oil still present ...

Claims

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Application Information

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IPC IPC(8): C10G53/04C10M175/00
CPCC10G53/04C10G2300/1062C10G2300/202C10M175/00
Inventor 张伟民张正颖
Owner 张伟民
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