Two-segment hydrocracking method

A hydrocracking and hydrofining technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of increased investment and complex process flow, and achieve low total cost, simple process flow, and high yield high effect

Active Publication Date: 2009-08-12
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these technologies have flexible schemes, the process is complicated and the investment increases

Method used

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  • Two-segment hydrocracking method
  • Two-segment hydrocracking method

Examples

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Effect test

Embodiment 1

[0027] Example 1 is an example of a single-stage two-agent full-circulation process, which does not include the second-stage hydrocracking, and the tail oil is recycled back to the inlet of the first stage to illustrate the advancement of the single-stage two-agent hydrocracking process. The conditions and results are shown in Table 1 below.

[0028] Table 1 Example of a single-stage two-dose full cycle process

[0029] Example 1 Reference example 1 Raw oil properties VGO in the sand VGO in the sand Density / kg·m -3 924.9 924.9 Distillation range / ℃ 337～539 337～539 Sulfur content / m% 2.53 2.53 Nitrogen content / μg·g -1 766 766 Hydrocracking process conditions catalyst 3996 / ZHC-02 ZHC-02 Catalyst loading ratio by volume 40:60 / Pressure / MPa 15.7 15.7 temperature / ℃ 407 / 410 415 Volumetric space velocity / h -1 1.0 1.0 Hydrogen oil volume ratio 1240：1 1240：1 Conversion per pass...

Embodiment 2

[0031] Example 2 is an example of a single-stage two-agent single-pass process, which does not include the second-stage hydrocracking, and the tail oil does not circulate, which further illustrates the advancement of the single-stage two-agent hydrocracking process. Conditions and results are shown in Table 2 below.

[0032] Table 2 Example of single-pass flow process for raw oil

[0033] implementation plan Example 2 Reference example 2 Reference example 3 Reference example 4 Raw oil properties Iran VGO Iran VGO Iran VGO Iran VGO Density / kg·m -3 913.5 913.5 913.5 913.5 Distillation range / ℃ 285～537 285～537 285～537 285～537 Sulfur content / m% 1.74 1.74 1.74 1.74 Nitrogen content / μg·g -1 1514 1514 1514 1514 Hydrocracking process conditions catalyst FF-16 / FC-14 FC-14 FF-16 / 3976 FF-16 / 3976 Catalyst loading volume ratio 42:58 / 1：1 42:58 Pressure / MPa 15.7 15.7 15.7 15.7 ...

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Abstract

The invention discloses a two-stage hydrocracking method for producing high-quality middle distillate oil. The feedstock oil is mixed with hydrogen and directly enters the first-stage hydrocracking reactor. The first-stage hydrocracking reactor adopts two catalysts in one stage, that is, two catalysts are used in the single-stage hydrocracking process, and the upper part is filled with refined agents , the lower part is filled with cracking agent, and the tail oil of the first stage is recycled to the inlet of the hydrocracking reactor of the second stage. The method of the present invention uses a set of circulating hydrogen system and separation system. Compared with the prior art, the method of the present invention not only maintains the advantages of high middle distillate oil yield, low chemical hydrogen consumption and less total catalyst cost of the single-stage two-agent hydrocracking technology, but also possesses the single-stage serial hydrocracking technology It has the characteristics of strong adaptability to raw oil, long catalyst operation period and good quality of hydrocracking products. The method of the invention is mainly used in the hydrocracking process for producing high-quality middle distillates by using various heavy distillates as raw materials.

Description

technical field [0001] The invention discloses a hydrocracking method, in particular to a two-stage hydrocracking method for producing middle distillate oil, that is, the unconverted tail oil of the first stage hydrocracking is subjected to the second stage hydrocracking. Background technique [0002] In recent years, the demand structure of the petroleum product market has undergone corresponding changes with the development of the economy. The demand for gasoline, coal and diesel oil, especially middle distillates such as coal and diesel oil, has increased, while the demand for fuel oil has decreased. Crude oil processed by refineries is becoming increasingly heavy, while the quality requirements for engine fuels such as gasoline, coal, and diesel continue to increase, and environmental protection regulations are becoming increasingly stringent. Therefore, more and more attention has been paid to the process of producing high-quality middle distillates. The range of raw m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/10
Inventor 白振民曾榕辉石友良刘涛孙洪江孙薇
Owner CHINA PETROLEUM & CHEM CORP
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