A kind of iron poisoning deactivation hydrogenation desulfurization catalyst regeneration solution and regeneration method

Abstract

The invention discloses a regeneration liquid and a regeneration method for an iron poisoning deactivation hydrodesulfurization catalyst. The regeneration liquid comprises, by weight, 3-20 wt% of oleic acid, 50-70 wt% of water, and 10-47 wt% of an extraction liquid, wherein the extraction liquid is diethyl ether and / or benzene. The regeneration method comprises: (1) sequentially carrying out oil firing, sulfur firing and carbon firing on a hydrodesulfurization catalyst being subjected to iron poisoning deactivation; and (2) adding the catalyst treated in the step (1) to the regeneration liquid, soaking, carrying out standing layering, filtering the catalyst in the water phase, washing, drying, and calcining to obtain the regenerated catalyst. With the method of the present invention, the iron poisoning catalyst is effectively regenerated, such that the pore volume, the specific surface area, the side compressive strength and the hydrodesulfurization activity of the catalyst are recovered.

Description

technical field [0001] The invention relates to a catalyst regeneration technology, in particular to a hydrogenation desulfurization catalyst regeneration solution and regeneration method for deactivated iron poisoning. Background technique: [0002] Hydrofining catalysts inevitably have carbon on the surface during operation. When carbon deposits reach a certain level, the pore volume and specific surface area of ​​the catalyst will decrease, and the hydrodesulfurization activity of the catalyst will decrease rapidly. At this time, the catalyst needs to be regenerated, and the catalyst surface will change The carbon and sulfur in the catalyst will restore the pore volume and specific surface area of ​​the catalyst to the standard of the fresh agent, and the catalyst activity will be restored, but sometimes due to the free iron ions in the raw oil, or the corrosion of fatty acids, chlorine and other equipment to produce iron ions, iron ions Adsorbed on the surface of the cat...

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Problems solved by technology

[0002] Hydrofining catalysts inevitably have carbon on the surface during operation. When carbon deposits reach a certain level, the pore volume and specific surface area of ​​the catalyst will decrease, and the hydrodesulfurization activity of the catalyst will decrease rapidly. At this time, the catalyst needs to be regenerated, and the catalyst surface will change The carbon and sulfur in the catalyst will restore the pore volume and specific surface area of ​​the catalyst to the standard of the fresh agent, and the catalyst activity will be restored, but sometimes due to the free iron ions in the raw oil, or the corrosion of fatty acids, chlorine and other equipment to produce iron ions, iron ions Adsorbed on the surface of the catalyst, block the micropores of the catalyst, reduce the pore volume and specific surface area of ​​the catalyst, and cause permanent poisoning of the catalyst. In severe cases, the catalyst needs to be replaced.

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