Method for producing hydrogenated diesel oil with low condensation point by gradation technology
A technology, diesel technology, applied in the field of hydrogenation for the production of low-condensation diesel oil, which can solve the problems of reducing the service life of the hydrogenation decondensation catalyst, the limitation of diesel fraction yield and depreciation effect, and the high reaction temperature at the outlet of the bed, so as to achieve desulfurization Remarkable effect, strong raw material adaptability, and low catalyst cost
Active Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
In this method, the temperature drop in the bed of the hydrodepreciation catalyst is relatively large, and the yield of the diesel fraction and the improvement of the depreciation effect are limited to a certain extent, which reduces the service life of the hydrodecondensation catalyst.
[0006] CN102051232A introduces a method for diesel hydrotreating decondensation. This method is to adjust the properties of the catalyst so that the effect of diesel decondensation is good and the yield of diesel fractions is high. The combination process, the contradiction between the pour point depressing effect and the diesel fraction yield still exists
[0008] The reaction temperature at the outlet of each bed layer is still relatively high, and the cycle is limited to a certain extent
Method used
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Embodiment 1
[0040] use figure 1 The process flow shown is to produce low-condensation-point diesel oil by using gradation series and mixed packing process. In Example 1, two hydrogenation reaction zones connected in series are included. In the composite bed of refining and upgrading catalyst in each reaction zone, the mixing volume ratio of the hydrogenation refining catalyst and the hydrogenation upgrading catalyst is 1:4, and the total amount of catalyst used is Both of Comparative Example 1 and Comparative Example 2 are the same. The hydrogenation upgrading catalyst used in Example 1 is FC-18 catalyst, the hydrofining catalyst is FH-98 catalyst, and the hydrogenation decondensation catalyst is FDW-3 catalyst, all of which are developed and produced by Fushun Petrochemical Research Institute commodity catalyst.
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The invention discloses a method for producing hydrogenated diesel oil with a low condensation point by gradation technology. 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 hydrodewaxing catalyst bed layer, and a hydro-refining hydro-upgrading catalyst composite bed layer filled with a mixture of a hydro-refining catalyst and a hydro-upgrading catalyst; 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 with, improves the diesel oil yield 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 method for producing hydrogenated low-condensation diesel oil by grading technology, in particular to a hydrogenation method for producing low-condensation diesel oil through catalyst grading technology and composite filling technology. Background technique [0002] Diesel, as a fuel for compression ignition engines, plays an irreplaceable role as a non-renewable resource in modern production and life, and can be used as vehicles, tanks, airplanes, tractors, railway vehicles and other vehicles or other machinery Fuel can also be used for power generation, heating, etc. 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 d...
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Inventor 黄新露王仲义吴子明石友良廖娜崔哲
Owner CHINA PETROLEUM & CHEM CORP