Method for regenerating and revivifying hydrogenation catalyst

Abstract

The invention discloses a method for regenerating and revivifying a hydrogenation catalyst, which comprises the steps of treating an inactivated hydrogenation catalyst subjected to sulfur burning and carbon burning treatment with organic sulfur compound-containing thioalcohol and / or thioether and roasting a resulting product, wherein the organic sulfur compound-containing thioalcohol and / or thioether accounts for 0.1 to 2.2 percent of the weight of the inactivated hydrogenation catalyst. The method of the invention can effectively weaken the interaction between metal and the carrier to obtain a regenerated hydrogenation catalyst with high activity restoration degree. The method is particularly suitable for vulcanized hydrofining catalysts and hydrogenation catalysts.

Description

technical field

[0001] The invention relates to a regeneration and revival method of a hydrogenation catalyst, in particular to a regeneration and revival method of a sulfurized non-noble metal hydrorefining catalyst or a hydrogenation treatment catalyst. Background technique

[0002] Hydrogenation catalysts are key to the production of clean fuel oils and other chemical feedstocks from crude oil. During the hydrogenation process, the catalyst will be deactivated due to various reasons, mainly including: the active metal on the catalyst changes due to long-term operation, the pore structure of the catalyst changes due to the carbon deposit on the catalyst, impurities in the raw oil (such as Catalyst irreversible deactivation caused by metal nickel, vanadium) deposition, etc. Among these phenomena, the influence of carbon deposition is the most obvious. Deactivated hydrotreating catalysts typically contain 3-15% by weight of carbon deposits which result in a reduction in ca...

Examples

Embodiment 1

[0018] Preparation of deactivated catalyst.

[0019] Take Industrial CoMo / Al 2 o 3 Hydrorefining catalyst, hydrodesulfurization of diesel fuel in a trickle bed reactor until the activity is significantly lower than that of the fresh catalyst (see Table 1). Lower the temperature to room temperature, and take out the deactivated hydrotreating catalyst, numbered SA.

[0020] The following examples use the SA catalyst to carry out the regeneration test.

Embodiment 2

[0022] Take the catalyst SA and regenerate it in an air atmosphere. Calcined at a constant temperature of 300°C for 5 hours, then raised to 525°C for 5 hours, and cooled to room temperature to obtain catalyst A0.

Embodiment 3

[0024] Catalyst A0 was impregnated with 0.5% dodecylmercaptan by weight of catalyst A0 for 2 hours, and then calcined at 380° C. for 1 hour to obtain catalyst A1.

technical field

[0001] The invention relates to a regeneration and revival method of a hydrogenation catalyst, in particular to a regeneration and revival method of a sulfurized non-noble metal hydrorefining catalyst or a hydrogenation treatment catalyst. Background technique

[0002] Hydrogenation catalysts are key to the production of clean fuel oils and other chemical feedstocks from crude oil. During the hydrogenation process, the catalyst will be deactivated due to various reasons, mainly including: the active metal on the catalyst changes due to long-term operation, the pore structure of the catalyst changes due to the carbon deposit on the catalyst, impurities in the raw oil (such as Catalyst irreversible deactivation caused by metal nickel, vanadium) deposition, etc. Among these phenomena, the influence of carbon deposition is the most obvious. Deactivated hydrotreating catalysts typically contain 3-15% by weight of carbon deposits which result in a reduction in ca...

Examples

Embodiment 1

[0018] Preparation of deactivated catalyst.

[0019] Take Industrial CoMo / Al 2 o 3 Hydrorefining catalyst, hydrodesulfurization of diesel fuel in a trickle bed reactor until the activity is significantly lower than that of the fresh catalyst (see Table 1). Lower the temperature to room temperature, and take out the deactivated hydrotreating catalyst, numbered SA.

[0020] The following examples use the SA catalyst to carry out the regeneration test.

Embodiment 2

[0022] Take the catalyst SA and regenerate it in an air atmosphere. Calcined at a constant temperature of 300°C for 5 hours, then raised to 525°C for 5 hours, and cooled to room temperature to obtain catalyst A0.

Embodiment 3

[0024] Catalyst A0 was impregnated with 0.5% dodecylmercaptan by weight of catalyst A0 for 2 hours, and then calcined at 380° C. for 1 hour to obtain catalyst A1.