Full-fraction FCC (fluid catalytic cracking) gasoline alkadiene removal/super deep desulfurization composite treatment method and device

A technology for removing diolefins and deep desulfurization, which is used in hydrocarbon oil treatment products, hydrocarbon oil treatment, and hydrotreating processes. , to achieve the effect of low investment cost and operating cost of the device, high adsorption selectivity and adsorption capacity, and long-term stable operation.

Inactive Publication Date: 2017-04-26
SHAANXI YANCHANG PETROLEUM GRP +1
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  • Application Information

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Problems solved by technology

This shows that the adsorption sulfur capacity of the adsorbent still cannot meet the requirements of industrial applications; It also greatly limits its industrial application
[0009] To sum up, in the existing documents or patents, gasoline ultra-deep desulfurization (sulfur content is less than 10ppmw) technology also has the following disadvantages: 1. The choice of hydrodesulfurization process route is long, energy consumption is high, octane 2. In the selective hydrodesulfurization process, a large amount of alkali slag and other environmental problems are produced by the alkali washing mercaptan process; 3. The adsorption selectivity and adsorption capacity of the adsorbent used in the selective adsorption desulfurization are relatively low. 4. In the fluidized bed hydrogenation reaction-adsorption desulfurization, the operating conditions are harsh, the energy consumption is high, the adsorbent loss is serious, and the operating cost is high
Especially when the olefin content is high, the resulting octane loss exceeds 2 units; 5. In the fluidized bed hydrogenation reaction-adsorption desulfurization, the sulfur capacity of the adsorbent is low, the regeneration of the adsorbent is frequent, the energy consumption is high, and the operating cost is high. high

Method used

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  • Full-fraction FCC (fluid catalytic cracking) gasoline alkadiene removal/super deep desulfurization composite treatment method and device
  • Full-fraction FCC (fluid catalytic cracking) gasoline alkadiene removal/super deep desulfurization composite treatment method and device
  • Full-fraction FCC (fluid catalytic cracking) gasoline alkadiene removal/super deep desulfurization composite treatment method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] This example utilizes as figure 1 The device shown in the figure carries out diene / ultra-deep desulfurization composite treatment on the full-cut FCC gasoline whose properties are shown in Table 1. The specific treatment method includes the following steps:

[0085] Table 1 Properties of full cut FCC gasoline

[0086]

[0087]

[0088] Step 1. Using full-fraction FCC gasoline and hydrogen as raw materials, hydrogen is mixed through the first pipeline 1 and full-fraction FCC gasoline through the second pipeline 2 into the first mixer 3, and the mixture of the two passes through the first heat exchanger 4 After heat exchange, it enters the diene removal reactor 5, and contacts with the diene removal catalyst 6 in the diene removal reactor 5, so that the whole cut FCC gasoline is subjected to a hydrogenation diene removal reaction; The reaction conditions are: reaction temperature 80°C, hydrogen partial pressure 1.5MPa, hydrogen-oil volume ratio 100NL / L, liquid hour...

Embodiment 2

[0094] This example utilizes as figure 1 The device shown in the figure carries out diene / ultra-deep desulfurization composite treatment on the full-cut FCC gasoline whose properties are shown in Table 1. The specific treatment method includes the following steps:

[0095] Step 1. Using full-fraction FCC gasoline and hydrogen as raw materials, hydrogen is mixed through the first pipeline 1 and full-fraction FCC gasoline through the second pipeline 2 into the first mixer 3, and the mixture of the two passes through the first heat exchanger 4. After heat exchange, it enters the diene removal reactor 5, and contacts with the diene removal catalyst 6 in the diene removal reactor 5, so that the whole cut FCC gasoline is subjected to a hydrogenation diene reaction; the hydrogenation diene The reaction conditions are: reaction temperature 100°C, hydrogen partial pressure 1.5MPa, hydrogen-oil volume ratio 120NL / L, liquid hourly space velocity 3.0h -1 . Sampling analysis after reacti...

Embodiment 3

[0101] This example utilizes as figure 1 The device shown in the figure carries out diene / ultra-deep desulfurization composite treatment on the full-cut FCC gasoline whose properties are shown in Table 1. The specific treatment method includes the following steps:

[0102] Step 1. Using full-fraction FCC gasoline and hydrogen as raw materials, hydrogen is mixed through the first pipeline 1 and full-fraction FCC gasoline through the second pipeline 2 into the first mixer 3, and the mixture of the two passes through the first heat exchanger 4. After heat exchange, it enters the diene removal reactor 5, and contacts with the diene removal catalyst 6 in the diene removal reactor 5, so that the whole cut FCC gasoline is subjected to a hydrogenation diene reaction; the hydrogenation diene The reaction conditions are: reaction temperature 180°C, hydrogen partial pressure 2.0MPa, hydrogen-oil volume ratio 150NL / L, liquid hourly space velocity 3.0h -1 . Sampling analysis after reacti...

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Abstract

The invention provides a full-fraction FCC (fluid catalytic cracking) gasoline alkadiene removal / super deep desulfurization composite treatment method which comprises the following steps: I, enabling full-fraction FCC gasoline and hydrogen as raw materials to contact a alkadiene removal catalyst so as to remove alkadiene in the full-fraction FCC gasoline; II, performing fractionation so as to form a heavy component and a light component; III, performing hydrodesulfurization on the heavy component so as to obtain a low-sulfur heavy component; performing hydrogening adsorption desulfuration on the light component so as to obtain a low-sulfur light component; IV, mixing the low-sulfur heavy component with the low-sulfur light component, thereby obtaining super low-sulfur gasoline of which the sulfur content is less than 10ppmw. As the full-fraction FCC gasoline is subjected to selective hydrogenation to remove alkadiene, and composite treatment for super deep desulfurization is implemented with the combination of techniques of hydrodesulfurization and hydrogening adsorption desulfuration, the sulfur in the full-fraction FCC gasoline can be reduced to be less than 10ppmw, the octane value loss is less than 2 units, and the liquid yield is greater than 99.8%.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, and relates to a treatment technology of full-fraction FCC gasoline, in particular to a method and a device for compound processing of full-fraction FCC gasoline by de-diolefin / ultra-deep desulfurization. Background technique [0002] SO produced by the combustion of organic sulfur compounds in gasoline 2 There are many harms to the environment, mainly including: acid rain, irreversible poisoning of the precious metal "three-way catalyst" in the engine exhaust gas purification system, the main contributor to particulate matter in the atmosphere, and corrosion of metal equipment. For this reason, in the early 1990s, the United States promulgated the new Qinggu Air Amendment Act (CAAA), formulated more stringent environmental regulations, and imposed stricter restrictions on the sulfur content in gasoline, which were implemented in 2006. The ultra-low sulfur gasoline standard of less than 3...

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/202C10G2300/305C10G2300/4006C10G2300/4012C10G2400/02
Inventor 王军峰李灿蒋宗轩罗万明刘铁峰刘戈李鸿雄
Owner SHAANXI YANCHANG PETROLEUM GRP
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