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Catalytic hydrogenation method for inferior wax oil

A low-quality wax oil, catalytic hydrogenation technology, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of harsh reaction conditions, high hydrogen consumption and energy consumption, fast carbon deposition rate, etc. The effect of reducing density, reducing emission of flue gas pollutants, and reducing consumption

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the heavy and inferior quality of raw materials and the limitation of catalyst activity, it is still difficult to produce Euro IV and Euro V gasoline stably for a long period of time by using the combined process of hydrotreating and catalytic cracking. And restrictive factors such as high energy consumption, fast carbon deposition rate, and short operation cycle

Method used

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  • Catalytic hydrogenation method for inferior wax oil

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specific Embodiment approach

[0047] According to a preferred embodiment of the present invention, the method of the present invention comprises:

[0048] (1) In the presence of hydrogen, the inferior wax oil is introduced into the first reaction zone to carry out the first hydrorefining;

[0049] (2) The effluent of the first reaction zone is introduced into the flash section for flash evaporation to obtain gas phase components and liquid phase components;

[0050] (3) introducing the liquid phase components into the second reaction zone and contacting with the hydrogen gas introduced from the bottom of the second reaction zone in countercurrent to carry out the second hydrofinishing;

[0051] (4) introducing the gas-liquid separation system after mixing the effluent from the second reaction zone with the gas phase components obtained in step (2), to obtain hydrogen-rich gas and liquid phase stream;

[0052] (5) introducing the hydrogen-rich gas into a circulating hydrogen desulfurization system for desu...

Embodiment 1

[0064] In this example, a high-sulfur vacuum wax oil fraction from the Middle East is used as the raw material of inferior wax oil, its properties are shown in Table 1, and the reaction conditions are shown in Table 2. The first reaction zone is filled with supported CoMo catalyst RVS-420, and the second reaction zone is filled with Supported catalyst RN-32V.

[0065] according to the invention figure 1 The process schematic diagram shown is carried out, specifically:

[0066] Inferior wax oil 1 and circulating hydrogen 18 are mixed and enter the first reaction zone 2 through a heat exchanger (not shown) and a heating furnace (not shown), and the first reaction zone effluent 5 enters the flash section 3, and flashes out The gas phase component 6, the liquid phase component enters the second reaction zone 4, and the hydrogen gas 20 formed by mixing the fresh hydrogen gas 19 and the recycled hydrogen 18 enters from the bottom of the second reaction zone 4, and the liquid phase ...

Embodiment 2

[0090] In this example, a mixture of high-sulfur vacuum gas oil fraction and coker gas oil in the Middle East is used as the raw material of low-quality wax oil, and its properties are shown in Table 1. The first reaction zone is filled with RN-32V, and the second reaction zone is filled with non-loaded gas oil. Hydrogen Refining Catalyst .

[0091] Present embodiment adopts the method similar to embodiment 1 to carry out, and difference is:

[0092] The reaction conditions are shown in Table 4.

[0093] All the other are identical with embodiment 1.

[0094] The properties of the resulting product are shown in Table 5.

[0095] Table 4

[0096] Process conditions

[0097] table 5

[0098] Product properties of refined wax oil

[0099] As can be seen from the data in Table 4 and Table 5, under mild reaction conditions, the sulfur content can be reduced from 13000 μg / g in the raw material to 469 μg / g in the refined wax oil product by adopting the metho...

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Abstract

The invention discloses a catalytic hydrogenation method for inferior wax oil. The method comprises the steps: (1) introducing the inferior wax oil to a first reaction zone for first hydrofining in the presence of hydrogen gas; (2) introducing effluent of the first reaction zone to a flash vaporization section for flash vaporization, so as to obtain a gas-phase component and a liquid-phase component; (3) introducing the liquid-phase component to a second reaction zone, and subjecting the liquid-phase component to countercurrent contact with hydrogen gas introduced from the bottom of the second reaction zone, so as to carry out second hydrofining; and (4) mixing effluent of the second reaction zone with the gas-phase component obtained in the step (2), and then, introducing the mixture into a gas-liquid separation system and a fractionating system sequentially. According to the method disclosed by the invention, the sulfur content and nitrogen content of high-sulfur and high-nitrogen inferior raw materials can be remarkably lowered, and the operating cycle of a catalytic hydrogenation device can be prolonged.

Description

technical field [0001] The invention relates to a method for catalytic hydrogenation of inferior wax oil. Background technique [0002] Since the beginning of the 21st century, the trend of heavy and inferior crude oil in the world has been intensified. At the same time, with the increasingly stringent environmental protection awareness and environmental regulations, the pace of upgrading the quality of vehicle fuels has been accelerating. my country began to implement the GB17930-2011 gasoline standard equivalent to Euro III in May 2011. Beijing began to implement the DB11 / 238-2007 gasoline standard equivalent to Euro IV on January 1, 2008, and implemented the DB11 / 238-2012 gasoline standard equivalent to Euro V on June 1, 2012. [0003] Catalytic cracking technology is a technology in which heavy petroleum hydrocarbons react under the action of a catalyst to produce light oil products such as liquefied gas, gasoline and diesel oil. It is one of the key technologies for li...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 任亮蒋东红胡志海张毓莹梁家林龙湘云聂红
Owner CHINA PETROLEUM & CHEM CORP
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