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Combined hydrogenation process

A process method and pre-hydrogenation technology, which can be used in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of complex process flow, and achieve the effect of simple process flow, lower equipment investment cost and lower investment cost.

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process uses wax oil and low-quality diesel oil as raw materials and is divided into three reaction zones. Although high-quality products can be produced, the process is relatively complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Adopt the method of the present invention to process naphtha raw material 1 and kerosene fraction raw material 1, the reforming pre-hydrogenation reaction conditions are: hydrogen partial pressure 1.8MPa, volume space velocity 4.0h -1 , The reaction temperature is 278°C, the volume ratio of hydrogen to oil is 100:1; the hydrogenation reaction conditions of jet fuel are: hydrogen partial pressure 1.5MPa, volumetric space velocity 4.2h -1, The reaction temperature is 265° C., and the volume ratio of hydrogen to oil is 95:1. The raw material oil properties and product properties are listed in Table 2.

[0029] It can be seen from Table 2 that the sulfur and nitrogen content of the reforming pre-hydrogenation unit products can be kept below 0.5 μg / g by adopting this process technology, and the jet fuel hydrogenation unit products can meet the quality requirements of 3# jet fuel.

Embodiment 2

[0031] The naphtha raw material 2 and the kerosene fraction raw material 2 are processed by the method of the present invention, and the reforming prehydrogenation reaction conditions are: hydrogen partial pressure 2.1MPa, volume space velocity 4.6h -1 , The reaction temperature is 281°C, the volume ratio of hydrogen to oil is 120:1; the hydrogenation reaction conditions of jet fuel are: hydrogen partial pressure 1.7MPa, volumetric space velocity 3.5h -1 , The reaction temperature is 260°C, and the volume ratio of hydrogen to oil is 158:1. The raw material oil properties and product properties are listed in Table 3.

[0032] It can be seen from Table 3 that the sulfur and nitrogen content of the reforming pre-hydrogenation unit products can be kept below 0.5 μg / g by using this process technology, and the aviation fuel hydrogenation unit products can meet the quality requirements of 3# jet fuel.

Embodiment 3

[0034] The naphtha raw material 3 and the kerosene fraction raw material 3 are processed by the method of the present invention, and the reforming prehydrogenation reaction conditions are: hydrogen partial pressure 2.3MPa, volume space velocity 3.8h -1 , The reaction temperature is 280°C, the volume ratio of hydrogen to oil is 150:1; the hydrogenation reaction conditions of jet fuel are: hydrogen partial pressure 1.9MPa, volumetric space velocity 3.5h -1 , The reaction temperature is 252°C, and the volume ratio of hydrogen to oil is 163:1. The raw material oil properties and product properties are listed in Table 4.

[0035] It can be seen from Table 4 that the sulfur and nitrogen content of the reforming pre-hydrogenation unit products can be kept below 0.5 μg / g by adopting this process technology, and the jet fuel hydrogenation unit products can meet the quality requirements of 3# jet fuel.

[0036] The physicochemical property index of table 1 catalyst

[0037]

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Abstract

The invention relates to a combined hydrogenation process. The process comprises the following steps: 1, fully mixing reformed prehydrogenation raw oil with hydrogen, and carrying out a desulphurization and denitrification reaction by allowing them to go through a heating furnace and then enters a hydrogenation reactor; 2, carrying out oil-gas separation by a separator to obtain refined oil which can satisfy quality requirements of the reformed raw material; and 3, directly mixing a hydrogen-rich gas with jet fuel hydrogenation raw oil, and carrying out a hydrogenation reaction by allowing them to go through a heating furnace and then enters a reactor to obtain a product which satisfies quality index requirements of a 3# jet fuel. The method of the invention, which can simultaneously satisfy the requirements of qualified products produced with two hydrogenation devices and has the characteristics of simple process flow and no need of a cycle hydrogen compressor and a new hydrogen compressor, has the advantages of low investment and operation cost, good product property, stable operation and the like.

Description

technical field [0001] The invention relates to a combined hydrogenation process, in particular to a combined process for reforming pre-hydrogenation and jet fuel hydrogenation. Background technique [0002] Reforming pre-hydrogenation units and jet fuel hydrogenation units are common hydrogenation units in oil refineries. The reforming pre-hydrogenation unit is mainly to provide qualified feed for the reformer, while the jet fuel hydrogenation unit is mainly to produce qualified 3# jet fuel for airlines. Because the purposes of the two sets of equipment are quite different, oil refineries usually construct the two sets of equipment separately. However, the reforming prehydrogenation unit and the jet fuel hydrogenation unit are very similar in terms of process flow and operating conditions, and the catalysts used are basically the same. If the two sets of hydrogenation units are combined into a combined hydrogenation unit, the There will be a relatively large reduction in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 徐大海李扬刘继华丁贺牛世坤
Owner CHINA PETROLEUM & CHEM CORP
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