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A combined desulfurization process and equipment for full fraction fcc gasoline

A desulfurization process and full-distillate technology, which is applied in the petroleum industry, hydrotreating process, and hydrocarbon oil treatment, etc., can solve the problems of large loss of octane number, frequent regeneration of adsorbents, and long hydrodesulfurization process route, and achieves the goal of achieving a high level of desulfurization. Low investment cost and operating cost, high adsorption selectivity and adsorption capacity, and the effect of ensuring long-term stable operation

Active Publication Date: 2019-05-07
SHAANXI YANCHANG PETROLEUM GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A combined desulfurization process and equipment for full fraction fcc gasoline
  • A combined desulfurization process and equipment for full fraction fcc gasoline
  • A combined desulfurization process and equipment for full fraction fcc gasoline

Examples

Experimental program
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Effect test

Embodiment 1

[0092] This example utilizes as figure 1 The device shown in the figure carries out combined desulfurization treatment on the full cut FCC gasoline whose properties are shown in Table 1. The specific treatment method includes the following steps:

[0093] Table 1 Properties of full cut FCC gasoline

[0094]

[0095]

[0096] 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 80°C, hydrogen partial pressure 1.5MPa, hydrogen-oil volume ratio 100NL / L, liquid hourl...

Embodiment 2

[0103] This example utilizes as figure 1 The device shown in the figure carries out combined desulfurization treatment on the full cut FCC gasoline whose properties are shown in Table 1. The specific treatment method includes the following steps:

[0104] 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 reacting 500h, find that...

Embodiment 3

[0111] This example utilizes as figure 1 The device shown in the figure carries out combined desulfurization treatment on the full cut FCC gasoline whose properties are shown in Table 1. The specific treatment method includes the following steps:

[0112] 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 reacting 500h, find that...

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Abstract

The invention provides a full-range FCC gasoline combined desulfurization process which comprises the following steps: one, making full-range FCC gasoline and hydrogen gas contact with a dealkadiene catalyst, to remove alkadiene in the full-range FCC gasoline; two, fractionating to form a heavy component, an intermediate component and a light component; three, carrying out hydrodesulfurization on the heavy component, to obtain a low-sulfur heavy component; and carrying out hydrogen presence desulfurization adsorption desulfurization on the intermediate component, to obtain a low-sulfur intermediate component; four, mixing the low-sulfur heavy component, the low-sulfur intermediate component and the light component, to obtain super-low-sulfur gasoline with the sulfur content of less than 10 ppmw. The invention also provides a full-range FCC gasoline combined desulfurization device. Through selective hydrogenation dealkadiene and the hydrodesulfurization and hydrogen presence adsorption desulfurization combined ultra-deep desulphurization composite type treatment, sulfur in the full-range FCC gasoline sulfur is removed to 10 ppmw or less, the loss of octane number is less than 2 units, and the liquid yield is more than 99.8%.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry and relates to a treatment technology of full fraction FCC gasoline, in particular to a combined desulfurization process and equipment of full fraction FCC gasoline. 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 30ppmw has been established. Jap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/202C10G2400/02
Inventor 王军峰
Owner SHAANXI YANCHANG PETROLEUM GRP
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