Hydro-upgrading method for ungraded gasoline

A technology for hydro-upgrading and inferior gasoline, applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve problems such as low desulfurization rate, achieve high hydrodesulfurization, reduce olefin saturation rate, and improve aromatization Effects of chemoselectivity and octane retention

Active Publication Date: 2011-08-31
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method only adopts one-step desulfurization, so the desulfurization rate is low

Method used

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  • Hydro-upgrading method for ungraded gasoline
  • Hydro-upgrading method for ungraded gasoline
  • Hydro-upgrading method for ungraded gasoline

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] Preparation of selective hydrodesulfurization catalysts 1-4:

[0054] Preparation of Catalyst 1:

[0055] Mix SB powder, boron oxide and squash powder evenly, add nitric acid and water, knead and shape, dry at 120°C, and roast at 520°C for 4 hours to obtain a composite oxide carrier.

[0056] Prepare a suitable mixed impregnation solution of magnesium nitrate, potassium nitrate and diammonium hydrogen phosphate, impregnate the composite oxide carrier, age at room temperature for 6 hours, dry at 120°C for 3 hours, and roast at 530°C for 4 hours to obtain a catalyst modified with additives magnesium, potassium and phosphorus carrier.

[0057] Prepare a mixed solution of cobalt nitrate and ammonium molybdate with an appropriate concentration at a temperature of 70°C, add ammonia water to dissolve it completely, and then impregnate it on a catalyst carrier modified with additives magnesium, potassium and phosphorus, and age it at room temperature for 8 hours, 120 °C for 4...

Embodiment 1

[0094] The hydro-upgrading treatment adopts an adiabatic fixed bed, and two reactors are connected in series. The selective hydrodesulfurization catalyst 1 is loaded in the first reactor; the octane recovery catalyst 5 is loaded in the second reactor. Raise the temperature at 50°C / h to 150°C, and feed naphtha (containing 2wt% CS 2 ) sulfuration treatment for 1 hour, and then sulfuration treatment at 230° C., 290° C. and 320° C. for 6 hours respectively to complete the sulfuration treatment of the catalyst.

[0095] After the vulcanization treatment is completed, switch to full fraction FCC raw material gasoline 1, at a reaction pressure of 1.2MPa and a volume space velocity of 4.0h -1 , under the condition of hydrogen-oil ratio of 250, the inlet temperature of the first-stage reactor is controlled at 185°C, and the inlet temperature of the second-stage reactor is controlled at 300°C. After running for 800 hours, sample and analyze the composition of upgraded products, sulfur ...

Embodiment 2

[0097] The hydro-upgrading treatment adopts an adiabatic fixed bed, and two reactors are connected in series. The selective hydrodesulfurization catalyst 2 is loaded in the first reactor; the octane recovery catalyst 6 is loaded in the second reactor. The vulcanization treatment method is the same as in Example 1.

[0098] After the vulcanization treatment is completed, switch to full fraction FCC raw material gasoline 2, at a reaction pressure of 1.5MPa and a volume space velocity of 4.0h -1 , under the condition of hydrogen oil ratio of 300, the inlet temperature of the first-stage reactor is controlled at 190°C, and the inlet temperature of the second-stage reactor is controlled at 295°C. After running for 800 hours, sample and analyze the composition of upgraded products, sulfur content, octane number and liquid yield every 24 hours. The results are shown in Table 4.

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Abstract

The invention provides an upgrading method for implementing the desulfuration, alkene reduction and octane number recovery of ungraded gasoline by selective hydrogenation. In the method, a two-catalyst and two-reactor serial process flow is used, wherein a first-section reactor is loaded with a selective hydrodesulfurization catalyst; and a second-section reactor is loaded with an octane number recovery catalyst. Ungraded gasoline can be directly subjected to hydro-upgrading without being pre-fractionated into light and heavy fractions. The gasoline product upgraded by the two reactors can have a sulfur content less than 30mu g / g; compared with the raw material, the alkene is reduced by 17-20%; and the method can achieve an optimal effect that the octane number is hardly lost and the total liquid yield is more than 98.5wt%. The invention has better hydro-upgrading effect on the full-fraction catalytically cracked gasoline with high sulfur and alkene content, and can greatly reduce the alkene and sulfur content, ensure that the octane number is hardly lost and maintain a high liquid product yield.

Description

technical field [0001] The present invention relates to a method for hydro-upgrading of low-quality gasoline, in particular to a method for hydro-upgrading of low-quality FCC gasoline used in the field of petroleum refining such as catalytic cracking (FCC) gasoline, especially low-quality FCC gasoline with high sulfur and olefin content . In the method, the low-quality gasoline is subjected to two-stage hydrogenation upgrading of selective hydrodesulfurization and octane recovery to produce National IV standard gasoline. Background technique [0002] In order to control the air pollution caused by vehicle exhaust emissions, countries around the world have formulated clean gasoline standards marked by low sulfur and low olefin content. Judging from the existing technological process and development trend of my country's petroleum processing industry, for a long period of time in the future, the blending components of my country's motor gasoline will mainly be catalytic crack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04C10G65/06
Inventor 钱颖郑云弟王廷海龚光碧孙利民颉伟仇国贤王宗宝梁顺琴吴杰康宏敏常晓昕吕龙刚马好文柏介军蒋彩兰
Owner PETROCHINA CO LTD
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