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Hydrogenation system for hydrocarbon raw material and method thereof

A technology for raw materials and hydrocarbons, which is applied to the fixed bed hydrogenation system of hydrocarbon raw materials and the field of hydrogenation, can solve the problems of increased pressure drop in the reactor, and achieve the effect of high iron capacity and high iron interception ability.

Active Publication Date: 2018-03-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a fixed-bed hydrogenation system for hydrocarbon raw materials and its hydrogenation method in order to overcome the shortcomings of the reactor pressure drop rising rapidly when processing hydrocarbon raw materials with high iron content in the existing hydrogenation method

Method used

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  • Hydrogenation system for hydrocarbon raw material and method thereof
  • Hydrogenation system for hydrocarbon raw material and method thereof
  • Hydrogenation system for hydrocarbon raw material and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiments 1-2 are provided with the first pretreatment reaction zone and the second pretreatment reaction zone, and a single first fixed-bed reactor is set in the first pretreatment reaction zone, and the hydrogenation protecting agent and the first hydrodemetallization agent are filled in sequence , a single fixed-bed reactor is set in the second pretreatment reaction zone, and the hydrogenation protection agent and the second hydrodemetallation agent are filled in sequence, and the catalyst loading ratio is shown in Table 2. The hydrocarbon raw material is mixed with the first hydrogen-containing gas and then enters the first fixed-bed reactor, and is sequentially contacted with the hydrogenation protecting agent and the first hydrodemetallization agent for reaction, and the reaction product enters the second fixed-bed reactor, and is successively reacted with The hydrogenation protecting agent is contacted with the second hydrodemetallization agent to react, and the...

Embodiment 3

[0077] Embodiment 3 adopts the hydrogenation system provided by the present invention, including the first pretreatment reaction zone, the second pretreatment reaction zone, the first gas-liquid separation zone, the main reaction zone and the second gas-liquid separation zone. In the first pretreatment A first fixed-bed reactor is arranged in the reaction zone, a second fixed-bed reactor is arranged in the second pretreatment reaction zone, and a third fixed-bed reactor is arranged in the main reaction zone. The specific loading ratio of the catalyst is shown in Table 2.

[0078] The hydrocarbon raw material is mixed with the first hydrogen-containing gas and then enters the first fixed-bed reactor (R-1), where it is contacted with the hydrogenation protecting agent and the first hydrodemetallization agent for reaction, and the reaction product enters the second fixed-bed reactor The reactor (R-2) contacts with the hydrogenation protecting agent and the second hydrodemetallati...

Embodiment 4

[0085] The process flow of Example 4 is the same as that of Example 3, the catalyst loading scheme is shown in Table 2, and the reaction conditions are shown in Table 3.

[0086] Embodiment 4 has carried out the stability test of 8000h, and the raw material property and liquid phase stream II property are as shown in Table 5, and the iron content in the control liquid phase stream I is not more than 3 μ g / g, and the sulfur content in the liquid phase stream II is controlled at the same time not more than 0.15 % by weight, when the device starts to operate, the pressure drop of R-1 is 0.10MPa, the pressure drop of R-2 is 0.10MPa, and the pressure drop of R-3 is 0.20MPa. After the device runs for 8000h, the pressure drop of R-1 rises to 0.54MPa, The pressure drop of R-2 rises to 0.55MPa, the pressure drop of R-3 is 0.29MPa, and the reaction temperature of R-2 is 405°C.

[0087] As can be seen from the comparison of Example 3 and Example 4, the reaction temperature of R-3 in Exam...

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Abstract

The invention provides a hydrogenation system for a hydrocarbon raw material and a method thereof. The hydrogenation system comprises a first pretreatment reaction zone, a second pretreatment reactionzone, a first gas-liquid separation zone, a main reaction zone and a second gas-liquid separation zone, wherein the interior of the first pretreatment reaction zone is successively filled with at least one hydrogenation protective agent and at least one first hydrodemetallization agent; the interior of the second pretreatment reaction zone is filled with a second hydrodemetallization agent; and the interior of the main reaction zone is successively filled with at least one third hydrodemetallization agent and at least one hydrodesulfurization agent. The system provided by the invention has high iron tolerant capacity and iron intercepting capacity in pretreatment reaction zones, and overcomes the problem of insufficient capacity of intercepting an iron containing compound during long-period operation of the pretreatment reaction zones in the prior art.

Description

technical field [0001] The invention relates to a hydrocarbon feedstock hydrogenation system and a hydrogenation method thereof, more specifically a hydrocarbon feedstock fixed-bed hydrogenation system and a hydrogenation method thereof. Background technique [0002] Reactor pressure drop is one of the main factors restricting the operation cycle of hydrocarbon hydrotreating or hydrofinishing units. Taking the fixed-bed residual oil hydrogenation process as an example, the current operating period of the fixed-bed residual oil hydrogenation unit is generally between one year and one and a half years, while the operation period of the fixed-bed residual oil hydrogenation unit with a higher raw material iron content is Generally shorter, the main constraint factor is the pressure drop of the first or second reverse. Unlike metals such as nickel and vanadium, which are mainly deposited in the pores of the catalyst, iron is mainly deposited on the outer surface of the catalyst ...

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/205C10G2300/80
Inventor 邓中活施瑢邵志才孙淑玲戴立顺牛传峰刘涛杨清河胡大为
Owner CHINA PETROLEUM & CHEM CORP
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