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Method for hydrotreating poor diesel

A technology for hydrotreating and low-quality diesel oil, which is applied in the petroleum industry and refining hydrocarbon oil, etc., and can solve the problems of high investment cost and high operating pressure

Inactive Publication Date: 2011-01-12
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts a two-stage process, which requires two sets of high-pressure separation systems, the operating pressure is also high, and the investment cost is relatively high.

Method used

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  • Method for hydrotreating poor diesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Diesel raw material 1 goes through the heating furnace to reach the required temperature and fully mixes and dissolves hydrogen in the SV static mixer, then enters the hydrogenation reactor. The reaction conditions are: hydrogen partial pressure 6.4MPa, volume space velocity 1.7h -1 , The reaction temperature is 342°C, and the volume ratio of hydrogen to oil is 150:1. The raw material oil properties and product properties are listed in Table 2.

[0030] It can be seen from Table 2 that the sulfur content of diesel products can be reduced to below 50 μg / g by using this technology.

Embodiment 2

[0032] Diesel raw material 2 is fully mixed with hydrogen and enters the hydrogenation reactor after passing through the heating furnace. The gas-liquid mixer adopts SK type static mixer. The reaction conditions are: hydrogen pressure 5.8MPa, volume space velocity 1.5h -1 , The reaction temperature is 337°C, and the volume ratio of hydrogen to oil is 136:1. The raw material oil properties and product properties are listed in Table 3.

[0033] It can be seen from Table 3 that the sulfur content of diesel products can be reduced to below 50 μg / g by using this technology.

Embodiment 3

[0035] Diesel raw material 3 is fully mixed with hydrogen and enters the hydrogenation reactor after passing through the heating furnace. The reaction conditions are: hydrogen partial pressure 7.0MPa, volume space velocity 1.4h -1 , The reaction temperature is 346°C, and the volume ratio of hydrogen to oil is 210:1. Half of the hydrogen is mixed with the raw materials through the SV-type gas-liquid mixer, and the other half is directly added to the reactor through the pipeline. The raw material oil properties and product properties are listed in Table 4.

[0036] It can be seen from Table 4 that the sulfur content of diesel products can be reduced to below 50 μg / g by using this technology.

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Abstract

The invention relates to a method for hydrotreating poor diesel. The method comprises the following steps: thoroughly mixing raw oil with hydrogen in an oil-gas mixer through a heating furnace, and carrying out conventional hydrofining reaction by contacting with hydrogenation catalyst at low hydrogen / oil volume ratio under moderate technological conditions. Compared with the conventional hydrofining technique, the invention can acquire better refining effect under the same technological conditions. The method is used for poor diesel fractions in petrochemical corporations, such as coking diesel, catalytic diesel, visbreaking diesel or mixture thereof with straight-run diesel. The method can be used for producing ultralow-sulfur clean diesel of which the sulfur content is lower than 50 mu g / g, has the advantages of simple technical process, stable operation and favorable product quality, and can use newly built hydrogenation units or reform old units.

Description

technical field [0001] The invention relates to a method for hydrogenation treatment of low-quality diesel oil, in particular to a process method for producing ultra-low-sulfur diesel oil by hydrogenation of raw materials of low-quality diesel oil. Background technique [0002] Ultra-low sulfur diesel (ULSD) refers to automotive diesel fuel with a sulfur content of less than 50 μg / g or even lower. With the increasingly stringent requirements of environmental protection laws and regulations around the world, developed countries such as Europe and the United States have taken the lead in requiring their own countries to implement the quality standards of ultra-low sulfur diesel. In recent years, with the continuous attention of the Chinese government to environmental protection, the quality requirements for vehicle diesel are also increasing. It is foreseeable that in the near future, the country will also mandate the use of ultra-low sulfur diesel. [0003] With the heavy an...

Claims

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Application Information

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IPC IPC(8): C10G45/22
Inventor 徐大海牛世坤刘继华李扬王震
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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