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A process for producing lubricating oil base oil from inferior raw materials

A technology for lubricating base oils and low-quality feedstock oils, applied in the petroleum industry, lubricating compositions, hydrotreating processes, etc., can solve the problems of light fraction dewaxing, mass loss, yield loss, etc. Effect of reducing hydrogen sulfide and ammonia content and increasing hydrogen partial pressure

Active Publication Date: 2017-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • A process for producing lubricating oil base oil from inferior raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] use figure 1 In the process flow shown, the hydrocracking in the third stage is a one-pass process, and all the hydrocracking tail oil undergoes isomerization dewaxing reaction. Hydrofinishing catalyst A is loaded in the first section, and hydrofinishing catalyst B is filled in the second section. The upper part of the refining reaction zone of the second stage adopts gas-liquid parallel flow reaction, and the lower part adopts gas-liquid countercurrent reaction, and the catalyst loading volume ratio of the parallel flow section and the countercurrent section is 1:1.

[0052] In the hydrocracking tail oil pre-fractionation tower, the tail oil is cut into three tail oil fractions. The cutting temperatures of light tail oil, intermediate tail oil and heavy tail oil are respectively 400°C and 450°C. Isomerization dewaxing reaction.

Embodiment 2

[0054] Both the first section and the second section are filled with hydrotreating catalyst B, and the others are the same as in Example 1.

Embodiment 3

[0070] The basic process of the process is as figure 1 As shown, the >370°C distillate part is recycled to the inlet of the second-stage hydrotreating reactor, and the circulation amount is 25% of the tail oil. Control the denitrification rate of the first stage reaction zone to 75wt%. The cutting temperature of the hydrocracking tail oil is the same as in Example 1.

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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, a poor-quality raw material is firstly subjected to a first-stage hydrorefining reaction, and the reaction effluent is separated; the liquid enters a second-stage refining stage to carry out a deep denitrogenation and aromatic hydrocarbon saturation reaction, a gas-liquid co-current flow process and a gas-liquid counter flow process are concurrently adopted in the second stage, and the refining generated oil is subjected to hydrocracking; and the cracking tail oil is 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 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 method for producing lubricating oil base oil, in particular a process 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 refining ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/12C10M177/00
Inventor 白振民曾榕辉孙立刚杨立国
Owner CHINA PETROLEUM & CHEM CORP
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