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A kind of hydrodesulfurization method of FCC gasoline

A technology for hydrodesulfurization and gasoline, applied in chemical instruments and methods, processing hydrocarbon oil, petroleum industry, etc., and can solve problems such as limitations

Active Publication Date: 2021-07-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hard templating agent can obtain a better macroporous structure, it has certain shortcomings in adjusting the pore size. The solubility of polyvinyl alcohol soft templating agents in water is affected by the degree of polymerization, which leads to its use in ultra-macroporous alumina. There are also certain limitations in the preparation of

Method used

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  • A kind of hydrodesulfurization method of FCC gasoline
  • A kind of hydrodesulfurization method of FCC gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Use a beaker to measure 240 mL of deionized water, add 12.0 g of 68% nitric acid into the deionized water, mix evenly, and place in a water bath at 80°C. Weigh 6.0 g of sodium polyacrylate with a molecular weight of one million and add it into the prepared deionized water nitric acid solution, stir and completely dissolve to obtain an acid solution containing sodium polyacrylate.

[0032] Weigh 300g of pseudo-boehmite powder and 15.0g of safflower powder, and mix them evenly. Add the acid solution of sodium polyacrylate to the pseudo-boehmite and squat powder, and knead-extrude them into a clover shape. Dry at 120°C for 8 hours, and calcined at 650°C for 4 hours to obtain macropore-containing alumina carrier A-1. The specific surface area and pore size distribution of the alumina support with macropores are shown in Table 1.

[0033] Get 233.3g of ammonium heptamolybdate and 17.32g of cobalt nitrate and join them in 50ml of distilled water, add ammonia water to adjust ...

Embodiment 2

[0035] The preparation method of the acid solution of the pore-enlarging agent polyacrylic acid, kneading-extrusion, drying and roasting methods are carried out according to Example 1. The difference is that the million-grade sodium polyacrylate is replaced with ten-million-grade polyacrylic acid to obtain the alumina carrier A-2 with macropores. The specific surface area and pore size distribution of the alumina support with macropores are shown in Table 1.

[0036] Ammonium molybdate and cobalt nitrate were prepared as an impregnating solution, and ammonia water was added to adjust the pH value so that all the salts were dissolved, and then the alumina carrier A-2 containing macropores was impregnated. The specific steps were the same as in Example 1. Dry at 110°C for 6 hours, and calcined at 550°C for 8 hours to obtain catalyst 2. The main composition of the catalyst 2 is: 6wt% of cobalt oxide, 8wt% of molybdenum oxide, and 86wt% of carrier.

[0037] The hydrodesulfurizatio...

Embodiment 3

[0039] The preparation method of the acid solution of ammonium polyacrylate, kneading-extruding, drying and roasting methods are carried out according to Example 1. The difference is that the million-grade sodium polyacrylate is replaced by the one-hundred-thousand-grade ammonium polyacrylate to obtain the macropore-containing alumina carrier A-3. Its specific surface area and pore size distribution are shown in Table 1.

[0040] Ammonium molybdate and cobalt nitrate were prepared as an impregnating solution, and ammonia water was added to adjust the pH value so that all the salts were dissolved, and then the alumina carrier A-3 containing macropores was impregnated. The specific steps were the same as in Example 1. Dry at 130°C for 4 hours, and calcined at 580°C for 7 hours to obtain catalyst 3. The main composition of the catalyst 3 is: 2wt% cobalt oxide, 10wt% molybdenum oxide, and 88wt% carrier.

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Abstract

The invention relates to a hydrodesulfurization method for FCC gasoline, which adopts a fixed-bed reactor; the catalyst is a supported cobalt-molybdenum catalyst, the composition of the catalyst includes cobalt oxide and molybdenum oxide, and the carrier is alumina with a macroporous structure. Hydrodesulfurization process conditions are: reaction temperature 180-320°C, reaction pressure 1.1-2.8MPa, volumetric space velocity 1.2-3.5h ‑1 , the volume ratio of hydrogen to oil is 180‑400:1. The hydrodesulfurization process has mild conditions, strong adaptability to different raw materials, low octane loss, and high desulfurization rate.

Description

technical field [0001] The invention provides a hydrogenation desulfurization method of FCC gasoline, which is used for hydrogenation desulfurization of catalytic cracking gasoline to produce gasoline products. Background technique [0002] Petroleum and its products, as the main source of energy and raw materials for daily chemicals, support the economic development of the entire country. Catalytic processes and reactions are an indispensable part of petroleum processing. In order to improve the conversion efficiency in petroleum processing, the development of high-efficiency catalysts has always been the common pursuit of scientific researchers. In order to improve the conversion efficiency of catalysts, macroporous catalyst support materials are widely used to improve the performance of catalysts from the perspective of increasing mass transfer rate. [0003] As a traditional catalyst carrier material, alumina has the characteristics of mature technology, adjustable pore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/08B01J23/882
CPCB01J23/002B01J23/882B01J2523/00C10G45/08C10G2300/202C10G2300/305C10G2400/02B01J2523/31B01J2523/68B01J2523/845
Inventor 常晓昕王廷海曹耀武姚文君李景锋王书峰黄德华刘敏杨博
Owner PETROCHINA CO LTD
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