Process method for producing lubricating oil base oil from inferior raw materials

Abstract

The present invention discloses a process method for producing lubricating oil base oil through a poor-quality raw material. According to the process method of the present invention, a poor-quality raw material firstly enters a first-stage reaction zone to carry out a hydrorefining reaction, a co-current flow process and a counter flow process are concurrently adopted in the first stage, the generated oil obtained in the first stage enters a second-stage reaction zone to carry out a deep hydrogenation reaction, and the second-stage reaction effluent is subjected to hydrocracking; and the cracking tail oils are subjected to cutting pre-fractionation to obtain the suitable tail oil distillate, and the suitable tail oil distillate is subjected to an isomerizing dewaxing and finishing reaction to obtain the lubricating oil base oil distillate. With the method of the present invention, the nitrogen-containing impurities in the poor-quality raw material can be subjected to hydrotreating under the relatively mild condition so as to make the poor-quality raw material meet the hydrocracking feeding requirement, such that the lubricating oil base oil raw material source is broadened; and the operation period of the device can be increased and the poor-quality raw material can be processed, or the processing capacity of the device can be increased in the same operation period.

Description

technical field [0001] The invention discloses a production method of lubricating oil base oil, in particular to a process method for producing lubricating oil base oil by processing inferior raw materials through a combination process of hydrocracking and isomerization dewaxing. Background technique [0002] With the rapid development of my country's economy, the oil processing capacity has grown rapidly. At the same time, domestic hydrocracking technology has also obtained large-scale industrial applications. By the end of 2011, there were more than 40 sets of hydrocracking units in operation in my country, with a total processing capacity of more than 50.0Mt / a, and the processing capacity leapt to the top of the world. second. In addition, due to the year-by-year deterioration of the quality of domestic crude oil, the substantial increase in the processing volume of imported high-sulfur crude oil, the increasingly stringent requirements for environmental protection on the...

AI Technical Summary

Problems solved by technology

This method is only an organic combination of the two units, which reduces the investment and operating costs of the unit. The product quality of the hydrocracking unit has not improved, and the hydrocracking tail oil is mixed into the isomerization dewaxing unit for production For Group III oil, if the heavy fraction reaches the pour point requirement of lubricating oil base oil, the light fraction will be dewaxed severely, resulting in a large amount of yield loss and quality loss

Images