Method for producing hydrogenated low condensation diesel oil

A production method and diesel technology, which are used in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of operation cycle limitation and high reaction temperature at the outlet of the bed, reduce hot spot temperature, improve yield and 16 The effect of alkane number and operating cost saving

Active Publication Date: 2016-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • 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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  • Method for producing hydrogenated low condensation diesel oil

Examples

Experimental program
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Effect test

Embodiment 1

[0042] use figure 1 The process flow shown is to produce low-condensation-point diesel by means of mixing and grading series processes. 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.

[0043] The operating conditions and test results are listed in Table 3.

Embodiment 2

[0045] 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.

[0046] Table 2 Raw oil properties table.

[0047] project Raw oil source Often three-line diesel Density(20℃) / g·cm -3 0.8808 Distillation range / ℃ 270～390 Ni...

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Abstract

The invention discloses a method for producing hydrogenated diesel oil with a low freezing point. The method comprises the following steps: mixing a diesel oil raw material with hydrogen, allowing the obtained mixture to sequentially go through at least two serially connected hydrogenation reaction zones, wherein the hydrogenation reaction zones sequentially comprise a pour point reduction modified catalyst composite bed layer filled with a hydrodewaxing catalyst and a hydroupgrading catalyst and a hydrodewaxing catalyst bed layer along a material flow direction; and separating a reaction effluent obtained from the last hydrogenation reaction zone, and fractioning to obtain a diesel oil product with a low freezing point. The method reasonably combines the temperature decrease of the hydrodewaxing process and the temperature rise of the hydroupgrading process, so the diesel oil with a low freezing point is produced, the yield and the cetane value of the diesel oil are improved, the hot spot temperature of a device is reduced, and the running period is prolonged; and the consumption of cold hydrogen or the combustion gas loss of a heating furnace is reduced, so the operating cost is 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 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 point depressing range can reach 20-50°C. While obt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2400/04
Inventor 石友良王仲义彭冲崔哲孙士可黄新露吴子明潘德满
Owner CHINA PETROLEUM & CHEM CORP
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