Method for production hydrogenation of low freezing point diesel fuel

A production method and diesel oil technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of high reaction temperature at the outlet of the bed layer, limited operation cycle, etc., and achieve remarkable desulfurization effect, guaranteed yield, good The effect of pour point depressing effect

Active Publication Date: 2015-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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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 utilizat

Method used

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  • Method for production hydrogenation of low freezing point diesel fuel

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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 depreciating and upgrading catalyst in each reaction zone, the mixing volume ratio of the hydrogenation depreciating catalyst and the hydrogenation and upgrading catalyst is 1:2, and the catalyst The total amount is the same as that of Comparative Example 1 and Comparative Example 2. The hydrogenation upgrading catalyst used in Example 1 is FC-18 catalyst, and the hydrodecondensation catalyst is FDW-3 catalyst, both of which are 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 Example 1, two hydrogenation reaction zones connected in series are included. 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 upgrading catalyst is 1:2, and the total amount of catalyst is 1:2. Consumption is all the same as Comparative Example 1 and Comparative Example 2. The hydromodified isomerization depreciation catalyst used in Example 2 is FC-18G catalyst, and the hydrodegradation catalyst is FDW-3 catalyst, both of which are 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 Often three-line diesel ...

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Abstract

The present invention discloses a production method for hydrogenation of a low freezing point diesel fuel. According to the 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 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 decrease during the hydrodewaxing process and the temperature increase during the hydro-upgrading 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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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/304C10G2400/04
Inventor 王仲义崔哲彭冲石友良孙士可黄新露吴子明
Owner CHINA PETROLEUM & CHEM CORP
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