A kind of 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 increased yield and cetane number, Effect of reducing hot spot temperature and reducing consumption

Active Publication Date: 2017-02-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • A kind of production method of low condensation diesel oil

Examples

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Effect test

Embodiment 1

[0043] use figure 1 The process flow shown is to produce low-condensation-point diesel oil by using gradation series and mixed packing process. In embodiment 1, two hydrogenation reaction zones connected in series are included, and in the composite bed of the combined depreciation catalyst in each reaction zone, the mixing volume ratio of the hydrogenation depreciation catalyst and the hydrogenation modified isomerization depreciation catalyst is 1: 2. The total amount of catalyst used is the same as that of Comparative Example 1 and Comparative Example 2. The hydromodified isomerization depreciation catalyst used in Example 1 was FC-14 catalyst, and the hydrodegradation catalyst was FDW-3 catalyst, both of which were commercial catalysts developed and produced by Fushun Petrochemical Research Institute.

[0044] The operating conditions and test results are listed in Table 3.

Embodiment 2

[0046] use figure 1 The process flow shown is to produce low-condensation-point diesel oil by using gradation series and mixed packing process. In embodiment 1, two hydrogenation reaction zones connected in series are included, and in the composite bed of the combined depreciation catalyst in each reaction zone, the mixing volume ratio of the hydrogenation depreciation catalyst and the hydrogenation modified isomerization depreciation catalyst is 1: 2. The total amount of catalyst used is the same as that of Comparative Example 1 and Comparative Example 2. The hydromodified isomerization depreciation catalyst used in Example 2 was FC-14G catalyst, and the hydrodegradation catalyst was FDW-3 catalyst, both of which were commercial catalysts developed and produced by Fushun Petrochemical Research Institute.

[0047] The operating conditions and test results are listed in Table 3.

[0048] Table 2 Raw oil properties table.

[0049] project Raw oil source Oft...

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Abstract

The present invention discloses a low freezing point diesel fuel production method. According to the low freezing point diesel fuel production method, a diesel fuel raw material and hydrogen gas are mixed and then sequentially pass through at least two hydrogenation reaction zones connected in series, wherein each hydrogenation reaction zone sequentially comprises a hydrodewaxing catalyst bed layer and a composite catalyst bed layer filled with a hydrodewaxing catalyst and a hydro-upgrading isodewaxing catalyst in a mixed manner according to the material flowing direction; and the reaction effluent obtained from the last hydrogenation reaction zone is subjected to separation and fractionation to obtain the low freezing point diesel fuel product. With the method of the present invention, the temperature increase of the hydro-upgrading dewaxing process and the temperature decrease during the hydrodewaxing process are subjected to reasonable combination utilization, such that the low freezing point low-sulfur diesel fuel is produced while the diesel fuel yield and the cetane number are increased, the hot spot temperature of the device is reduced, and the operation period is prolonged; and the cold hydrogen consumption or the heating furnace fuel gas loss is reduced, and the operating cost is further saved.

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 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 reach 20-50°C. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
CPCC10G67/02C10G2300/4006
Inventor 王仲义崔哲彭冲石友良潘德满孙士可黄新露吴子明
Owner CHINA PETROLEUM & CHEM CORP
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