A hydrogenation catalyst and its pretreatment method, method and application of improving the desulfurization activity of the hydrogenation catalyst

A technology of hydrogenation catalyst and performance, applied in the field of hydrogenation catalyst pretreatment, can solve the problems of low hydrodesulfurization activity and the like

Active Publication Date: 2020-06-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects of low hydrodesulfurization activity in the prior art, provide a new hydrogenation catalyst pretreatment method and improve the method of hydrogenation catalyst desulfurization activity, adopt the method of the present invention to pretreat the hydrogenation Catalyst with significantly higher HDS activity

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  • A hydrogenation catalyst and its pretreatment method, method and application of improving the desulfurization activity of the hydrogenation catalyst
  • A hydrogenation catalyst and its pretreatment method, method and application of improving the desulfurization activity of the hydrogenation catalyst

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Embodiment approach

[0046] According to one embodiment, the method provided by the present invention comprises the following steps: (1) using a mixed gas containing hydrogen and hydrogen sulfide to sulfide the hydrogenation catalyst; (2) lowering the temperature of the sulfided catalyst obtained in step (1) , and then introduce a mixed gas containing inert gas and oxygen to contact with the sulfided catalyst for passivation; (3) unload the catalyst obtained in step (2) from the sulfidation reactor, and then impregnate an equal volume of solution containing organic oxygen-containing compounds (4) In an inert gas atmosphere, the catalyst obtained in step (3) is heat-treated at a higher temperature.

[0047] The present invention also provides the pretreated hydrogenation catalyst obtained by the above method. Using the method provided by the invention can obviously improve the desulfurization activity of the hydrogenation catalyst.

[0048] The catalyst treated according to the method of the prese...

Embodiment 1

[0053] Put 20 mL of Catalyst 1 particles with a diameter of 1-3 mm into the constant temperature zone of the reactor of the small-scale hydrogenation test device, and fill the upper and lower parts of the reactor with circular ceramic balls. Then carry out following operation steps successively to carry out pretreatment to catalyst 1 particle:

[0054] (1) Using 2 volume % H 2 S+98vol%H 2 The mixed gas raises the device to an operating pressure of 1.6MPa, and the gas volume space velocity is 500h -1 , and then use 1h to raise the reactor temperature from room temperature to 230°C, then keep the temperature for 2h, then use 2h to raise the reactor temperature to 320°C, and then vulcanize at 320°C for 12 hours.

[0055] (2) After the temperature of the reactor drops to 50°C, switch the sulfide gas to 0.5% by volume O 2 +99.5vol%N 2 , the pressure is 1.6MPa, the gas volume space velocity is 600h -1 , Purge for 6h for passivation.

[0056] (3) After the passivation, the obta...

Embodiment 2

[0059] Put 20 mL of Catalyst 1 particles with a diameter of 1-3 mm into the constant temperature zone of the reactor of the small-scale hydrogenation test device, and fill the upper and lower parts of the reactor with circular ceramic balls. Then carry out following operation steps successively to carry out pretreatment to catalyst 1 particle:

[0060] (1) Using 8 volume% H 2 S+92vol%H 2 The mixed gas raises the device to an operating pressure of 0.6MPa, and the gas volume space velocity is 1000h -1 , and then use 1.5h to raise the reactor temperature from room temperature to 250°C, then keep the temperature for 1.5h, then use 2.5h to raise the reactor temperature to 380°C, and then vulcanize at 380°C for 4 hours.

[0061] (2) After the temperature of the reactor drops to 30°C, switch the sulfide gas to 5% by volume O 2 +95vol%N 2 , the pressure is 0.6MPa, the gas volume space velocity is 900h -1 , Purge for 3h for passivation.

[0062] (3) After the passivation is compl...

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Abstract

The invention discloses a method for pretreating a hydrogenation catalyst and a pretreated hydrogenation catalyst obtained by the method and application of the pretreated hydrogenation catalyst. The method comprises the following steps: performing sulfidation on the hydrogenation catalyst, and performing activation on sulfuretted hydrogenation catalyst; and the activation comprises the following steps: impregnating the sulfuretted hydrogenation catalyst by using an impregnation liquid containing an organic oxygenated compound, and then performing heat treatment, wherein the temperature of the heat treatment is 200-450 DEG C, and the time of the heat treatment is 0.5-12 hours. The method provided by the invention can effectively improve hydrogenation desulfurization performance of the hydrogenation catalyst.

Description

technical field [0001] The invention relates to a hydrogenation catalyst pretreatment method, a method for improving the desulfurization activity of the hydrogenation catalyst, a pretreated hydrogenation catalyst obtained by the method and its application in hydrodesulfurization reaction. Background technique [0002] The environmental problems caused by automobile exhaust emissions have become increasingly prominent, and countries all over the world have put forward stricter and stricter restrictions on the composition of engine fuel. It is imperative to reduce the sulfur content and produce clean fuels that comply with environmental regulations. At present, hydrodesulfurization is the most widely used and effective means of desulfurization. Industrially, the catalysts used in the hydrogenation process usually contain VIB and VIII metal elements (such as molybdenum, tungsten, nickel, cobalt, etc.), and the carrier is alumina or silicon-containing alumina. The freshly prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/882B01J37/02B01J37/20C10G45/08
CPCB01J23/882B01J37/0203B01J37/20C10G45/08C10G2300/201C10G2300/703C10G2400/02
Inventor 涂椿滟李大东褚阳刘锋李会峰李明丰
Owner CHINA PETROLEUM & CHEM CORP
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