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A kind of production method of hydrogenated low-condensation diesel oil

A production method and diesel technology, which are used in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of cycle limitation, limitation of diesel fraction yield and pour point depressant effect, and large temperature drop, so as to achieve the adaptability of raw materials. Strong, significant desulfurization effect, cetane number improvement effect

Active Publication Date: 2016-02-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, which has the characteristics of good diesel decondensation effect and high yield of diesel fractions by adjusting the properties of the catalyst. Combined process, conflict between pour point depressing effect and diesel fraction yield still exists
[0007] CN102453531A has introduced a kind of method of diesel oil hydrodepreciation, although the average reaction temperature of hydrodepreciation catalyst has been improved, and the temperature rise of refining agent has been used to increase the utilization rate of depreciation catalyst, but the reaction at the outlet of each bed layer The temperature is still relatively high, and the cycle is somewhat limited

Method used

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  • A kind of production method of hydrogenated low-condensation diesel oil

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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. Example 1 includes two hydrogenation reaction zones connected in series, and in each reaction zone’s composite bed of the modified depreciating catalyst, the mixing volume ratio of the hydrogenation-modifying catalyst and the hydrodecondensing 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 hydrogenated 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-upgrading dewaxing catalyst composite bed layer filled with a mixture of a hydro-upgrading catalyst and a hydrodewaxing 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, 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, 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 石友良王仲义吴子明黄新露廖娜崔哲
Owner CHINA PETROLEUM & CHEM CORP
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