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System and method for hydrogenation of iron-containing hydrocarbon feedstock

A raw material and hydrocarbon technology, which is applied in the fixed-bed hydrogenation system of iron-containing hydrocarbon raw materials and its hydrogenation field, can solve the problems of increased pressure drop in the reactor, and achieve the effect of increasing operating efficiency and improving economy

Active Publication Date: 2019-10-25
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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  • System and method for hydrogenation of iron-containing hydrocarbon feedstock
  • System and method for hydrogenation of iron-containing hydrocarbon feedstock
  • System and method for hydrogenation of iron-containing hydrocarbon feedstock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～2

[0066] Embodiments 1-2 are provided with a pretreatment reaction zone, and a single fixed-bed reactor is arranged in the pretreatment reaction zone, and the hydrogenation protecting agent and the first hydrodemetallization agent are sequentially filled in the reactor from bottom to top, and the catalyst loading ratio is such as As shown in Table 2, the particle size of the first hydrodemetallization agent loaded at the end of the flow direction is not greater than 1.3 mm. The hydrocarbon raw material is mixed with the hydrogen-containing gas and enters the fixed-bed reactor, where it is contacted with the hydrogenation protecting agent and the first hydrodemetallization agent in turn for reaction. The reaction product is extracted from the top of the fixed-bed reactor and enters the first gas-liquid separation After the zone, it is separated into a gas phase stream and a liquid phase stream. The reaction conditions are shown in Table 3, and the properties of raw materials and ...

Embodiment 3

[0069] Embodiment 3 adopts the fixed bed hydrogenation system provided by the present invention, including a pretreatment reaction zone, a first gas-liquid separation zone, a main reaction zone and a second gas-liquid separation zone, and a fixed bed reactor is set in the pretreatment reaction zone , a fixed bed reactor is set in the main reaction zone. The specific loading ratio of the catalyst is shown in Table 2. The particle size of the first hydrodemetallization agent loaded at the end of the flow direction in the pretreatment reaction zone is not greater than 1.3 mm.

[0070] The hydrocarbon raw material is mixed with the first hydrogen-containing gas and then enters the first fixed-bed reactor (R-1), where it successively contacts with the hydrogenation protecting agent and the first hydrodemetallization agent for reaction, and the reaction product enters the first gas-liquid After the separation zone, it is separated into a gaseous phase stream I and a liquid phase st...

Embodiment 4

[0077] 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.

[0078] 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 0.2 % by weight, when the device starts to operate, the pressure drop of R-1 is 0.05MPa, and the pressure drop of R-2 is 0.20MPa. After the device runs for 8000h, the pressure drop of R-1 rises to 0.53MPa, and the pressure drop of R-2 is 0.29MPa. The reaction temperature of R-2 was 405°C.

[0079] As can be seen from the comparison of Example 3 and Example 4, the reaction temperature of R-2 in Example 4 is 5°C lower than the reaction temperature of R-2 in Example 3, indicating...

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Abstract

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

Description

technical field [0001] The invention relates to a hydrocarbon raw material hydrogenation system and a hydrogenation method thereof, more specifically a fixed-bed hydrogenation system and a hydrogenation method for an iron-containing hydrocarbon raw material. 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 sur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/04
CPCC10G65/04C10G2300/1037C10G2300/1048C10G2300/107C10G2300/1077C10G2300/202C10G2300/205C10G2300/70
Inventor 邵志才邓中活孙淑玲戴立顺刘涛施瑢杨清河胡大为
Owner CHINA PETROLEUM & CHEM CORP
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