Hydrogenation method for regenerating waste lubricating oil

Abstract

The invention discloses a hydrogenation method for regenerating waste lubricating oil, the method comprises the following steps: separating the waste lubricating oil by a high-speed centrifuge, carrying out atmospheric and vacuum distillation, and then carrying out the following operations: step 1, adsorption: treating the waste lubricating oil by using aluminum oxide and graphene oxide as adsorbents; step 2, pre-hydrogenation: the base oil fraction obtained through adsorption enters a pre-hydrogenation refining unit filled with a protective agent, and the operation conditions are that the temperature ranges from 250 DEG C to 320 DEG C, the hydrogen partial pressure ranges from 2.5 Mpa to 5.0 Mpa, the hydrogen-oil volume ratio ranges from 300 V / V to 400 V / V, and the air speed ranges from 1.0 h <-1 > to 2.0 h <-1 >; the protective agent is prepared by the following steps: carrying out acid leaching treatment on diatomite by diluted sulfuric acid, separating to obtain aluminum in the diatomite, drying and grinding calcium sulfate obtained by neutralizing with lime, and loading one or two metals of cobalt and nickel. According to the hydrogenation method for regenerating the waste lubricating oil, the storage stability of the hydrogenated lubricating oil can be improved under the condition that the desulfurization activity or the demetalization activity is not reduced.

Description

Technical field: [0001] The invention relates to the technical field of regeneration of waste lubricating oil, in particular to a hydrogenation method for regeneration of waste lubricating oil. Background technique: [0002] my country is the third largest lubricating oil consumer in the world after the United States and Russia, and consumes more than 6-8 million tons of lubricating oil every year. With the increase in the number of motor vehicles and the increase in the consumption of lubricating oil, the amount of waste oil replaced by vehicles and equipment has soared every year. If these waste lubricating oils are discarded, it will bring great harm to the ecological environment and cause a great waste of energy. With the decrease of petroleum resources and the continuous rise of crude oil prices, the contradiction between energy supply and demand is prominent. Therefore, the recycling and reuse of waste lubricating oil is a practical problem faced by my country's envir...

AI Technical Summary

Problems solved by technology

At present, western developed countries have researched and developed the distillation-hydrogenation process as the most environmentally friendly, most operable and large-scale process in waste oil regeneration. However, due to the relatively complicated process and harsh operating conditions of the hydrogenation regeneration process, etc. Disadvantage, resulting in poor storage stability of regenerated lubricating oil