Method for producing hydrogenated diesel oil with low condensation point by catalyst gradation technology

A technology of catalyst and catalyst bed, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problems of reducing the service life of hydrogen decondensation catalyst, the limitation of diesel fraction yield and depreciation effect, bed outlet High reaction temperature and other problems, to achieve significant desulfurization effect, increase cetane number, and reduce hot spot temperature

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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  • Method for producing hydrogenated diesel oil with low condensation point by catalyst gradation technology

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Embodiment 1

[0043] 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 pour point depressing and upgrading catalyst in each reaction zone, the mixing volume ratio of the hydrogenation modified isomerization depressing catalyst and the hydrogenation modified catalyst is 1 : 4, the total catalyst consumption is all the same as Comparative Example 1 and Comparative Example 2. 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 Method for producing hydrogenated diesel oil with a low condensation point by catalyst gradation technology. The method comprises the following steps: mixing diesel oil 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 hydro-upgrading catalyst composite bed layer filled with a mixture of a hydro-upgrading isodewaxing catalyst and a hydro-upgrading catalyst, and a hydrodewaxing 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 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 hydrogenated low-condensation diesel oil using catalyst grading technology, in particular to a hydrogenation method for producing low-condensation diesel oil through catalyst composite loading and gradation 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 poin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 太史剑瑶王仲义彭冲石友良吴子明廖娜
Owner CHINA PETROLEUM & CHEM CORP
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