Hydrocracking Process for Reducing Sulfur Content in Light Distillate Products
A technology for hydrocracking and light fractions, which is applied in the field of hydrocracking light distillate oil mercaptan content and hydrocracking process, and can solve the problems of not being able to export the reactor in time, unfavorable hydrogenation reaction, and reducing the sulfur content of light fractions, etc. question
Active Publication Date: 2016-08-17
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
A hydroconversion method disclosed in CN101333459 is suitable for processing wide-fraction feedstock oil, and can pass the hydrocracking product stream through the lighter combined hydrofinishing reaction zone, thereby reducing the sulfur content of the light fraction, but it has relatively large restrictions on the feedstock oil
The improved hydrocracking method disclosed by CN1266256C adopts the upper part of the hot high-pressure separator to fill the hydrotreating catalyst, and utilizes the method of hot hydrogen stripping to saturate a part of aromatic hydrocarbon compounds when the light distillate oil is passed through the catalyst bed. The light fraction obtained in the hot high-pressure separator is hydrogenated and saturated, and the volume ratio of hydrogen to oil is too large, which is not conducive to the smooth progress of the hydrogenation reaction
[0006] In addition, the gasification rate in the hydrocracking reactor is relatively high, especially in the lower catalyst bed of the cracking reactor, many light components that are cracked once cannot be exported to the reactor in time, and undergo secondary or multiple cracking to generate C 1 ~C 4 products, reducing the hydrocracking liquid yield
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Embodiment 1-1
[0051] In Examples 1-1, 2-1, and 3-1, the high-temperature hydrogen-containing phase is drawn from the hydrocracking reactor and introduced into the hydrofining reactor, and all the gas phase separated from the cyclone separator enters the cold high fraction.
[0052] According to the process and conditions of Example 1, the high-temperature hydrogen-containing phase was extracted from the lower part of the second bed layer for post-hydrorefining, and the extracted amount was 20% of the circulating hydrogen (volume) to form Example 1-1, then C 5 + The liquid yield (quality) increased by 1.35 percentage points compared with Example 1.
[0053] According to the process and conditions of Example 2, the high-temperature hydrogen-containing phase is drawn from the lower part of the third bed for post-hydrorefining, and the drawn amount is 50% of the circulating hydrogen (volume) to form Example 2-1, then C 5 + The liquid yield (quality) increased by 2.74% compared with Example 2.
[0054] ...
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Abstract
The invention relates to a hydrocracking technology method reducing the content of sulfur in light fraction products. The hydrocracking technology method is mainly characterized in that an olefin hydrogenation saturation reaction and a hydrogenation mercaptan-removing reaction are carried out during post-hydrofining at a relatively reduced temperature and with a less volume ratio of hydrogen to oil. Compared with a method in the prior art, the hydrocracking technology method can effectively reduce the content of sulfur in the light fraction products.
Description
Technical field [0001] The invention belongs to a processing method of oil refining technology, and particularly relates to a hydrocracking process method and a method for reducing the mercaptan content of the hydrocracking light distillate oil. Background technique [0002] Increasingly stringent environmental regulations around the world require refiners to produce clean and environmentally friendly lightweight clean fuels. In oil refining technology, hydrogenation technology is one of the most effective means to produce clean products from inferior raw materials. Therefore, hydrogenation equipment has become the standard configuration of oil refineries. The number of hydrogenation equipment in oil refineries is increasing, accounting for the proportion of crude oil processing volume. Gradually increase. [0003] Hydrocracking technology is one of the hydrogenation technologies, and it is the most important means to convert heavy and inferior distillates into clean products. Hy...
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IPC IPC(8): C10G67/02
CPCC10G67/00C10G67/02C10G2300/202C10G2300/4006C10G2300/4012
Inventor 刘涛韩照明徐前康姜海涛张军牟春生佟德凡于庆国张玮
Owner CHINA PETROLEUM & CHEM CORP