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Presulfurized hydrodesulfurization catalyst and preparation method thereof

A hydrodesulfurization and catalyst technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of low activity of hydrodesulfurization catalysts, poor controllability, high cost

Active Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] Aiming at the defects of low activity of hydrodesulfurization catalyst in the prior art, complicated preparation process, poor controllability and high cost, the present invention provides a new presulfided hydrodesulfurization catalyst and presulfurized hydrodesulfurization catalyst The preparation method of the catalyst and the presulfurized hydrodesulfurization catalyst prepared by the method, the method omits the vulcanization process, the prepared catalyst active components are not only highly dispersed, but also fully vulcanized, and finally significantly improve the catalyst hydrodesulfurization performance

Method used

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  • Presulfurized hydrodesulfurization catalyst and preparation method thereof
  • Presulfurized hydrodesulfurization catalyst and preparation method thereof
  • Presulfurized hydrodesulfurization catalyst and preparation method thereof

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preparation example Construction

[0032] The present invention also provides a preparation method of a presulfided hydrodesulfurization catalyst, the preparation method comprising the following steps:

[0033] (1) impregnating the gamma-alumina carrier in a mixture containing urea, a water-soluble salt of metal component A and water, and obtaining a modified alumina carrier through heat treatment, filtration, washing and drying;

[0034] (2) Using a solution C containing a water-soluble salt of the metal component B, a sulfur source and a dilute acid as the impregnation solution, the modified alumina carrier obtained in step (1) is impregnated, heat-treated, and then carried out in an inert gas Drying, roasting, among them,

[0035] Metal component A is at least one of the metal elements selected from Group VIII, metal component B is at least one of the metal elements selected from Group VIB, and the sulfur source can be at 50-100 °C, Sulfur-containing substances hydrolyzed under acidic conditions.

[0036] ...

Embodiment 1

[0074] (1) 50.0g of γ-Al with a diameter of 2-5mm 2 o 3 The granules were immersed in 250.0 mL of a mixed aqueous solution containing 0.8 mol / L cobalt nitrate, 1.6 mol / L urea, and 0.32 mol / L ammonium chloride, heat-treated at 80°C for 24 hours, filtered, washed and then dried at 100°C for 6 hours to obtain Co-modified alumina support, the SEM image of the Co-modified alumina support is as follows figure 1 shown. From figure 1 It can be seen that the surface of the Co-modified alumina support has a large number of network structures, and the network density is listed in Table 1.

[0075] (2) Prepare 60 mL of aqueous solution containing 0.1 mol / L of sodium molybdate, 6 mL of absolute ethanol and 0.3 mol / L of thioacetamide, and adjust the pH of the solution to pH=6.5 with 1.5 mol / L of nitric acid to obtain solution C , weighed 4.0 g of the Co-modified alumina support obtained in step (1), immersed it in solution C for 1 hour, then treated it in a transposed oven (100 rpm) at ...

Embodiment 2

[0078] (1) 50.0g of γ-Al with a diameter of 2-5mm 2 o 3 The granules are immersed in 250.0 mL of a mixed aqueous solution containing 0.4 mol / L nickel nitrate, 1.2 mol / L urea, and 0.4 mol / L ammonium nitrate, heat-treated at 90°C for 12 hours, filtered, washed and then dried at 150°C for 2 hours to obtain Ni-modified alumina support, the grid density of the Ni-modified alumina support is listed in Table 1.

[0079] (2) Prepare 60 mL of aqueous solution containing 0.1 mol / L of sodium molybdate, 30 mL of absolute ethanol and 0.4 mol / L of thioacetamide, and adjust the pH of the solution to pH=4.5 with 2.4 mol / L of hydrochloric acid to obtain solution C , Weigh 4.0g of the Ni-modified alumina carrier obtained in step (1), immerse it in solution C for 1 hour, then treat it in a transposed oven (100rpm) at 75°C for 12h, filter, wash, Dry at 80°C for 6 hours in a nitrogen atmosphere, and then bake at 400°C for 6 hours in a nitrogen atmosphere to obtain catalyst S-2.

[0080] The ana...

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Abstract

The invention relates to a presulfurized hydrodesulfurization catalyst and a preparation method thereof. The preparation method comprises the following steps: (1) impregnating a gamma-alumina carrier in a mixture of water and a water-soluble salt containing urea and a metal component A and successively carrying out heat treatment, filtering, washing and drying so as to obtain a modified alumina carrier; and (2) with a solution C of a water-soluble salt containing a metal component B, a sulfur source and dilute acid as an impregnation solution, carrying out impregnation on the modified alumina carrier obtained in the step (1), then carrying out heat treatment, and then carrying out drying and roasting in inert gas. The method provided by the invention omits the process of sulfurization; the prepared catalyst has highly dispersed active components and is fully sulfurized, and a net structure is formed on the surface of the catalyst; so the hydrodesulfurization performance of the catalyst is obviously improved.

Description

technical field [0001] The invention relates to a presulfided hydrodesulfurization catalyst, a preparation method of the presulfided hydrodesulfurization catalyst and a presulfided hydrodesulfurization catalyst prepared by the method. Background technique [0002] Since the 1990s, with the sharp increase in car ownership, vehicle exhaust emissions have become one of the main reasons for the continuous deterioration of the human living environment. For this reason, countries around the world have formulated strict vehicle fuel standards, especially strict limits on the sulfur content, and hydrodesulfurization has become the main way to produce clean fuel. Catalyst technology is the core of hydrodesulfurization technology, how to improve catalyst performance becomes the key to realize efficient hydrodesulfurization process. With metal Mo or W as the main agent, metal Ni or Co as the auxiliary agent, and γ-A1 2 o 3 or modified γ-A1 2 o 3 It is still the hydrodesulfurizatio...

Claims

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Application Information

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IPC IPC(8): B01J23/882B01J23/883B01J23/888B01J35/10
CPCB01J23/002B01J23/882B01J23/883B01J23/888B01J2523/00B01J35/60B01J2523/845B01J2523/68B01J2523/31B01J2523/847B01J2523/69
Inventor 韩伟龙湘云张乐刘学芬李明丰杨清河聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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