Diesel hydrogenation process method
A process method and diesel technology, which can be used in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of unreasonable temperature distribution of the catalyst bed, unfavorable long-term stable operation of the catalyst, large hydrogenation heat release, etc. Achieve the effect of reducing energy consumption, increasing service life and improving response performance
Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
Coking full distillate oil has the characteristics of large heat release during hydrogenation. This process requires a large amount of cold hydrogen, and the temperature distribution of the catalyst bed in the reactor is unreasonable, which is not conducive to the long-term stable operation of the catalyst.
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[0015] In the diesel hydrogenation process of the present invention, the catalyst in the first reaction zone and the second reaction zone refers to a non-precious metal hydrogenation catalyst with functions such as hydrodesulfurization, hydrodenitrogenation, aromatics saturation, hydrogenation and upgrading, and the function of the catalyst Can focus on certain aspects. The non-precious metal catalyst generally exists in an oxidized state before use, and needs to be presulfurized so that the non-precious metal oxide can be converted into a sulfide to be reactive. Therefore, the non-precious metal catalyst should remain in a sulfide state during use. The hydrogenation catalyst used in the present invention can adopt conventional diesel oil hydrofinishing catalysts or hydrogenation upgrading catalysts, etc., generally with VIB group and / or Group VIII metals as active components, with alumina or silicon-containing alumina as a carrier, Molecular sieves and other components may al...
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Abstract
The invention discloses a diesel hydrogenation process method. The upper part in a hydrofining reactor is provided with a first reaction zone, and the lower part in the hydrofining reactor is provided with a second reaction zone; a liquid collecting and discharging part is arranged between the two reaction zones and is used for collecting liquid of reaction effluent in the first reaction zone and discharging the liquid out of the reactor; a gas phase of the reaction effluent in the first reaction zone enters the second reaction zone through a bubble cap of the liquid collecting and discharging part; a diesel raw material enters the second reaction zone and is mixed with the gas phase inflowing from the first reaction zone to be subjected to hydrofining reaction under the hydrofining condition; reaction effluent in the second reaction zone is subjected to gas-liquid separation to form a gas phase; the gas phase from which hydrogen sulfide is removed is mixed with a liquid phase to enter the first reaction zone so as to be subjected to hydrogenation reaction; and the hydrogenated product is obtained after the liquid phase of the reaction effluent in the first reaction zone is discharged by the liquid collecting and discharging part. Compared with the prior art, the method has the advantages that: reaction heat is fully utilized; a large amount of cold hydrogen is not needed; meanwhile, the reaction environments of different reaction zones are optimized, and the whole reaction performance is improved.
Description
technical field [0001] The invention relates to a process for hydrogenation treatment of hydrocarbons, in particular to a process for hydrogenation desulfurization and dearomatization of gas, liquid and solid three-phase diesel fractions. Background technique [0002] With the improvement of human environmental awareness and stricter environmental regulations, the production and use of clean vehicle fuels has become a development trend. As for the cleanliness of diesel oil, desulfurization and dearomatization are the key to cleanliness. [0003] At present, in the desulfurization and dearomatization technologies of diesel oil, hydrotreating technology is still the main and most effective technical means. There are also various hydroprocessing technologies, such as single-stage hydrogenation, single-stage series hydrogenation and two-stage hydrogenation. Each of these technologies has its own advantages and disadvantages. For example, single-stage hydrogenation and single-s...
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IPC IPC(8): C10G65/08
Inventor 柳伟
Owner CHINA PETROLEUM & CHEM CORP
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