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A combined method for producing high-grade lubricating oil base oil by hydrogenation of hydrocracking tail oil

A technology for hydrocracking tail oil and lubricating oil base oil, which is applied in the fields of oil refining, petrochemical industry and coal chemical industry, can solve the problems of low yield of base oil, etc. The effect of stability

Active Publication Date: 2015-10-28
SINOPEC NANJING ENG & CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defect of low yield of high-grade lubricating oil base oil existing in the prior art, to provide a kind of combination of isomerization dewaxing-supplementary refining and PSA purification, to hydrocracking tail oil The No. 4 base oil and No. 6 base oil obtained by vacuum pre-fractionation are used to switch or feed independently, and at the same time take into account the mixed feed of raw materials to produce API II and API III lubricating base oils

Method used

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  • A combined method for producing high-grade lubricating oil base oil by hydrogenation of hydrocracking tail oil
  • A combined method for producing high-grade lubricating oil base oil by hydrogenation of hydrocracking tail oil
  • A combined method for producing high-grade lubricating oil base oil by hydrogenation of hydrocracking tail oil

Examples

Experimental program
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Effect test

Embodiment 1

[0049] For hydrocracking tail oil, high-grade lubricating oil base oil is produced by combining isomerization dewaxing-supplementary refining and PSA purification. First, the hydrocracking tail oil (see Table 2 for properties) enters the vacuum pre-fractionator for vacuum fractionation. The cut point of vacuum fractionation is 430°C, and the light fraction of hydrocracking tail oil with an end boiling point ≤ 430°C is taken as No. 4 Base oil, heavy fraction of hydrocracking tail oil with initial boiling point > 430°C is used as No. 6 base oil (see Table 2 for properties), and the two enter the isomerization dewaxing-supplementary refining reactor by switching feed. The base oil is mixed with new hydrogen and recycled hydrogen, and then enters the isomerization dewaxing and supplementary refining reactors (see Table 3 for the catalyst used); the reaction is separated from gas and liquid, and the liquid product is often distilled under reduced pressure to obtain different lube ba...

Embodiment 2

[0051] The raw material that adopts, technological process and corresponding catalyzer are identical with embodiment 1, and what differ with embodiment 1 is the technological condition selected, and reaction technological condition is shown in Table 4, and the result and the property of the lubricating oil base oil product of generation are shown in Table 5 and Table 7.

Embodiment 3

[0053] Hydrocracking tail oil (properties are shown in Table 2) is used as the raw material, and the raw material is not subjected to vacuum pre-fractionation but directly enters the isomerization dewaxing-supplementary refining reactor and subsequent separation system. This example adopts the same processing flow and catalyst as in Example 1 and Example 2. The reaction process conditions are shown in Table 4, and the results and properties of the lubricating base oil products generated are shown in Tables 5 and 8.

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Abstract

The invention discloses a combination method for producing high-grade lubricant base oil by hydrogenating hydrocracking tail oil. The combination method comprises the steps of: carrying out decompression and fractional distillation on the hydrocracking tail oil to obtain NO.4 base oil stock with end distillation point of less than or equal to 430 DEG C and NO.6 base oil stock with end distillation point of more than 430 DEG C; then by adopting a mode of switching feeding or a mode of respectively feeding, carrying out hydrogenated isodewaxing reaction and complement refining reaction together with hydrogen; firstly carrying out gas-liquid separation on the reaction product to obtain hydrogen-rich gas and low-distillate oil; feeding the low-distillate oil into an atmospheric and vacuum distillation device to obtain dry gas and high-grade lubricant base oil; mixing and feeding the hydrogen-rich gas and dry gas into a PSA (Pressure Swing Adsorption) purification unit for purifying and then recycling. The combination method is flexible in process flow, strong in raw material adaptability, good in product quality, and low in energy consumption, the produced base oil can achieve the requirement of API (American Petroleum Institute) II type and III type high-grade lubricant base oil, and the yield of the obtained API III type base oil is higher.

Description

technical field [0001] The invention belongs to the fields of oil refining, petrochemical industry and coal chemical industry, and specifically relates to a combination process and equipment for producing high-grade lubricating oil base oil through hydrogenation of hydrocracking tail oil. Background technique [0002] The content of lubricating oil base oil in finished lubricating oil is usually 70% to 99%. The quality of base oil directly affects the quality of lubricating oil. The most important thing in China's lubricating oil market is internal combustion engine oil, which is divided into high, medium and low grades in terms of quality, and their market shares are 10%, 30% and 60% respectively. The current production situation of lubricating oil in my country is that the output of low-grade products is too large, the proportion of medium and high-end products is relatively small, and the gap of high-end products is relatively large. Moreover, there is a big gap between t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 崔保顺郑战利陈金樑王楠张凤娇芦霄然
Owner SINOPEC NANJING ENG & CONSTR
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