A kind of hydrorefining process of waste lubricating oil

A hydrorefining and waste lubricating oil technology, which is applied in the fields of gasoline and diesel blending combination and lubricating oil base oil, can solve the problems of high equipment and operation costs, complicated process, etc., reduce the accumulation of colloid, increase the contact area, reduce the burden effect
CN104611058BActive Publication Date: 2016-07-13WUHAN KELIN FINE CHEM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN KELIN FINE CHEM
Publication Date
2016-07-13

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Abstract

The invention provides a hydrofining process of waste lubricating oil. The process comprises: after pre-treating, dewatering and removing impurities from a raw material, removing pitch and colloid in a propane extraction or wiped film vaporization device, and perfecting the product quality via a two-stage hydrofining reactor, and filling a hydrogenation protective agent and a demetallization agent in a pre-hydrogenation reaction, wherein the reaction temperature is 310-360 DEG C, the pressure is 6-12 MPa, the volume ratio of hydrogen to oil is 100-300, and the liquid volume space velocity is 0.5-1.2h<-1>, the reaction temperature of a main hydrogenation reactor is 320-400 DEG C, the pressure is 6-12 MPa, the volume ratio of hydrogen to oil is 500-1000, the liquid volume space velocity is 0.2-0.6h<-1>, and the used catalyst is Ni-Mo-W-Ce / Al2O3 or Ni-Mo-P-La / Al2O3; no acid or alkali waste is discharged in the production process, thereby being environmentally friendly and pollution-free, the recovery rate of the waste oil is higher than 95%, and the oil quality can be greatly improved to increase the economic benefits.
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Description

technical field

[0001] The invention relates to a waste lubricating oil hydrogenation refining process. Specifically, it relates to a hydrogenation technology to remove impurities in waste lubricating oil, so as to obtain clean gasoline and diesel blending combination and lubricating oil base oil. Background technique

[0002] In terms of composition, lubricating oil is composed of 80%-90% base oil and 10%-20% additives. The main chemical composition is a mixture of various hydrocarbons and a small amount of non-hydrocarbons. However, after the lubricating oil has been used for a period of time, the performance of the lubricating oil has deteriorated due to physical, chemical or human factors, such as aldehydes, ketones, resins, asphalt colloidal substances, carbon black and organic acids, salt, water, metal shavings, etc. Contaminated impurities can no longer be used and become waste lubricating oil. In fact, waste lubricating oil is not waste, but only a few percent of t...

Claims

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