Production method of low-condensation diesel oil
A production method and diesel oil technology, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of high reaction temperature at the outlet of the bed, limited operation cycle, etc., and achieve remarkable desulfurization effect, guaranteed yield, and ten The effect of increasing the hexane number
Active Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
Although this method improves the average reaction temperature of the hydrodepressant catalyst and utilizes the temperature rise of the refined preparation to increase the utilization rate of the depreciation catalyst, the reaction temperature at the outlet of each bed is still relatively high, and the operation period is limited by a certain degree. limits
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Embodiment 1
[0042] use figure 1 The process flow shown is to produce low-condensation-point diesel by means of mixing and grading series processes. In Example 1, two hydrogenation reaction zones connected in series are included, and in the composite bed of the depointing catalyst in each reaction zone, the mixing volume ratio of the hydrogenation-modified isomeric depointing catalyst and the hydrogenation depressing catalyst is 1:4 . The hydrogenation modification catalyst used in Example 1 is FC-18 catalyst, the hydrogenation modification isomerization depreciation catalyst is FC-14 catalyst, and the hydrodegradation catalyst is FDW-3 catalyst, and the catalysts are Fushun Petroleum A commercial catalyst developed and produced by the Chemical Research Institute.
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Abstract
The invention discloses a production method of diesel oil with a low condensation point. The method comprises the following steps: mixing a diesel oil raw material with hydrogen, orderly passing through at least two hydrogenation reaction zones connected in series, wherein in the material flowing direction, each hydrogenation reaction zone orderly comprises a dewaxing catalyst composite bed layer filled with a mixture of a hydro-upgrading isodewaxing catalyst and a hydrodewaxing catalyst, and a hydro-upgrading catalyst bed layer; performing separation and fractionation of the reaction effluent from the last hydrogenation reaction zone to obtain the diesel oil product with a low condensation point. The method of the invention reasonably combines and utilizes the temperature decrease of the hydrodewaxing process with the temperature increase of the hydro-upgrading process, improves the diesel oil yield and the cetane value while producing diesel oil with a low condensation point and low sulfur, reduces the hot-spot temperature of the device, prolongs the running period, also reduces the cold hydrogen consumption or the combustion gas loss of a heating furnace, and saves operation cost.
Description
technical field [0001] The invention relates to a production method of low-condensation diesel oil, in particular to a hydrogenation method for producing low-condensation diesel oil through catalyst composite filling technology and grading technology. Background technique [0002] As a fuel for compression ignition engines, diesel plays an irreplaceable role as a non-renewable resource in modern production and life. Diesel fuel can be used as fuel for vehicles, tanks, airplanes, tractors, railway vehicles and other vehicles or other machinery, and can also be used for power generation and heating. Depending on the industry and environment in which it is used, the quality requirements of users for diesel products are also very different. For people living in alpine regions or in winter, the demand for low-condensing-point diesel has always been high. The traditional choice The cracking process can process waxy heavy diesel fractions, and the pour point depressing range can r...
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IPC IPC(8): C10G67/02
Inventor 王仲义吴子明石友良黄新露廖娜崔哲
Owner CHINA PETROLEUM & CHEM CORP
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