A process for producing lubricating oil base oil from inferior heavy distillates

Abstract

The present invention discloses a process method for producing lubricating oil base oil through poor-quality heavy distillate oil. According to the method, poor-quality heavy distillate oil and hydrogen gas enter a first-stage reaction zone to carry out a hydrorefining reaction, the liquid obtained by separating the reaction effluent and hydrogen gas enter a second-stage reaction zone to carry out a hydrorefining reaction, the second-stage reaction effluent enters a third-stage reaction zone to carry out a hydrocracking reaction, the hydrocracking reaction effluent is separated to obtain tail oil, the tail oil is subjected to pre-fractionation to the obtained the suitable tail oil distillate, and the suitable tail oil distillate is sequentially subjected to isomerizing dewaxing and finishing to obtain the lubricating oil base oil. 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 hydrorefining temperature is substantially reduced so as to increase the operation period of the device and process the poor-quality raw material, or increase the processing capacity of the device in the same operation period.

Description

technical field

[0001] The invention discloses a process method for producing lubricating oil base oil, in particular a process method for producing lubricating oil base oil by processing inferior heavy distillate oil. 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 refining process and the quality of petroleum products, and t...

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