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Comprehensive utilization method of hydrocracking tail oil

A technology of hydrocracking tail oil and hydrogen oil, applied in cracking, non-catalytic thermal cracking, organic chemistry, etc., can solve the problem that the quality of lubricating oil base oil is difficult to meet the requirements, shorten the operation period of cracking furnace, and improve the yield of lubricating oil base oil Low-level problems, to achieve the effect of increasing the yield of liquid products in the device, improving product quality, and reducing energy consumption

Active Publication Date: 2014-01-22
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using the full-fraction hydrocracking tail oil as the raw material for ethylene cracking not only has a low ethylene yield, but also tends to cause coke in the convection section and the oil transfer line of the ethylene cracking furnace, shortening the operating cycle of the cracking furnace; Hydrocracking tail oil to produce lubricating oil base oil will also lead to low yield of lubricating oil base oil, and the quality of lubricating oil base oil is difficult to meet the requirements
At the same time, the target product with low yield also increases the operating cost of the device
Therefore, none of the above methods can make the hydrocracking tail oil more rational and effective comprehensive utilization

Method used

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  • Comprehensive utilization method of hydrocracking tail oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First, hydrocracking tail oil (see Table 1 for properties) enters the vacuum tower for vacuum fractionation. The cut point of vacuum fractionation is 380°C, and the light fraction of hydrocracking tail oil at 380 ° C hydrocracking tail oil heavy fraction and hydrogen are mixed and then go through two reaction zones of hydroisomerization dewaxing and supplementary refining (the catalyst used is shown in Table 2); the reaction product is gas-liquid Separation, the gas is desulfurized and mixed with supplemental hydrogen before recycling, and the liquid product is often distilled under reduced pressure to obtain different lubricating oil base oil products. The process conditions and results of the reaction are shown in Table 4, and the properties of different lubricating base oil products are shown in Table 5 and Table 6.

Embodiment 2

[0031] The cut point of vacuum fractionation of hydrocracking tail oil is 420°C, and other conditions are the same as in Example 1.

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Abstract

The invention relates to a comprehensive utilization method of hydrocracking tail oil. The method comprises the following concrete steps: firstly, the hydrocracking tail oil is subject to vacuum distillation; the light fraction of the distilled hydrocracking tail oil is used as a raw material for preparing ethylene by steam cracking; and the heavy fraction of the distilled hydrocracking tail oil is used as a raw material for producing base oil of lubricating oil. High-quality base oil of lubricating oil can be prepared from the heavy fraction of the hydrocracking tail oil by the processes of heterogeneous dewaxing, supplementary refining and the like. Compared with the prior art, the method provided by the invention not only can produce high-quality base oil of lubricating oil but also can supply ethylene cracking raw materials; and meanwhile, the yield of olefin and base oil of lubricating oil is improved, the product cost is lowered, the problem of shortage in raw materials for producing the base oil of lubricating oil in enterprises is effectively solved, and the flexibility of the product scheme is improved.

Description

technical field [0001] The invention relates to a comprehensive utilization method of hydrocracking tail oil, in particular to a method of utilizing hydrocracking tail oil to produce lubricating oil base oil while simultaneously supplying ethylene cracking raw materials. Background technique [0002] Hydrocracking is one of the most important processing methods in today's oil refining industry. The products produced by hydrocracking of raw materials are mainly gas and liquid products including solvent oil, gasoline components and middle distillates. Secondly, there is a considerable part of unconverted oil, also known as hydrocracking tail oil. The hydrocracking tail oil has also been well hydromodified during the hydrocracking process, so it has the characteristics of low aromatic content, light color, low content of impurities such as sulfur and nitrogen, and high content of naphthenes and alkanes. [0003] At present, the application of hydrocracking tail oil is mainly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G7/00C10M101/02C10G9/00C07C11/04C10G73/02
CPCY02P20/52
Inventor 关明华姚春雷王鑫全辉
Owner CHINA PETROLEUM & CHEM CORP
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