Hydro-upgrading method of inferior gasoline

A low-quality gasoline, hydrogenation upgrading technology, applied in the fields of hydrotreating process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problem of low desulfurization rate, achieve high desulfurization rate, good desulfurization selectivity, low olefin saturation rate Effect

Active Publication Date: 2014-11-19
PETROCHINA CO LTD
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  • Abstract
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  • 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 of inferior gasoline
  • Hydro-upgrading method of inferior gasoline
  • Hydro-upgrading method of inferior gasoline

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0056] Preparation of selective hydrodesulfurization catalysts 1-5:

[0057] Preparation of Catalyst 1:

[0058] Mix and knead pseudo-boehmite, silica sol, nitric acid and water, extrude, dry at 120°C, and bake at 500°C for 4 hours to obtain a composite carrier of silica and alumina; then impregnate 100g of the composite carrier in magnesium nitrate , potassium nitrate and diammonium hydrogen phosphate, aged at 20-30°C for 5h, dried at 120°C, and calcined at 480°C for 5h to prepare a catalyst carrier containing additives magnesium, potassium and phosphorus; finally prepare nitric acid The mixed solution of cobalt and ammonium molybdate is impregnated on the catalyst carrier, aged at 20-30°C for 5h, dried at 120°C, and calcined at 500°C for 4h to prepare selective hydrodesulfurization catalyst 1.

[0059] Preparation of Catalyst 2:

[0060]Pseudoboehmite, metatitanic acid, nitric acid and water were mixed and kneaded, extruded, dried at 120°C, and calcined at 500°C for 4 hour...

Embodiment 1

[0095] 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 6 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.

[0096] After the vulcanization treatment is completed, switch to full fraction FCC raw material gasoline 1, at a reaction pressure of 1.5MPa 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 180°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 ...

Embodiment 2

[0098] 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 7 is loaded in the second reactor. The vulcanization treatment method is the same as in Example 1.

[0099] 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 300°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 a hydro-upgrading method of inferior gasoline through selectively hydrodesulfurizing, greatly reducing olefin and recovering octane value. The method adopts a process flow of two agents and two series devices. The first stage reactor is filled with a selective hydrodesulfurizing catalyst, and the second stage reactor is filled with a octane value recovering catalyst. The inferior gasoline can be directly hydro-upgraded without being pre-fractionated into light and heavy fractions. After upgrading through the two stages, the sulfur content of the product gasoline is less than 30 micrograms per gram, compared with the raw material, the olefin content is reduced by 20%, and the best effect is that the octane value can be basically not lost and the total liquid yield is more than 99 wt%. In the invention, particularly a better hydro-upgrading effect on fully fractionated catalytic cracking gasoline with high contents of sulfur and olefin can be obtained, thus, a higher product liquid yield can be kept at the same time of greatly reducing the olefin and sulfur contents and basically not losing the octane value.

Description

technical field [0001] The present invention relates to a method for hydrogenation and upgrading of low-quality gasoline, in particular to a method for hydrogenation and upgrading of gasoline with catalytic cracking (FCC) in the field of petroleum refining, 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 cracked gasoli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/02
Inventor 郑云弟王廷海钱颖孙利民王宗宝龚光碧吴杰颉伟吕龙刚梁顺琴常晓昕康宏敏马好文李平智蔡小霞边虎
Owner PETROCHINA CO LTD
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