Production method of high-quality diesel oil with low condensation point

Abstract

The invention discloses a production method of high-quality 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 hydro-upgrading isodewaxing catalyst bed layer, and a hydro-refining dewaxing catalyst composite bed layer filled with a mixture of a hydrodewaxing catalyst and a hydro-refining 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 increase of the hydro-refining and hydro-upgrading dewaxing process with the temperature decrease of the hydrodewaxing 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 method for producing low-condensation high-quality diesel oil, 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 depressing range can re...

Examples

Embodiment 1

[0037] use figure 1 The process flow shown is to produce high-quality diesel oil with low freezing point by using gradation series and mixed packing process. Example 1 includes two hydrogenation reaction zones connected in series, and in each reaction zone's composite bed of modified depreciating catalyst, the mixing volume ratio of hydrofinishing catalyst and hydrodecondensing catalyst is 1:4. The hydrorefining catalyst used in Example 1 is FH-98 catalyst, the hydrogenation modified isomerization depreciation catalyst is FC-14 catalyst, and the hydrodepreciation catalyst is FDW-3 catalyst. The catalysts are Fushun Petrochemical Co., Ltd. A commercial catalyst developed and produced by the research institute.

technical field

[0001] The invention relates to a method for producing low-condensation high-quality diesel oil, 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 depressing range can re...

Examples

Embodiment 1

[0037] use figure 1 The process flow shown is to produce high-quality diesel oil with low freezing point by using gradation series and mixed packing process. Example 1 includes two hydrogenation reaction zones connected in series, and in each reaction zone's composite bed of modified depreciating catalyst, the mixing volume ratio of hydrofinishing catalyst and hydrodecondensing catalyst is 1:4. The hydrorefining catalyst used in Example 1 is FH-98 catalyst, the hydrogenation modified isomerization depreciation catalyst is FC-14 catalyst, and the hydrodepreciation catalyst is FDW-3 catalyst. The catalysts are Fushun Petrochemical Co., Ltd. A commercial catalyst developed and produced by the research institute.

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