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Method for passivating sulfurized hydrogenation catalyst

A hydrogenation catalyst and passivation treatment technology, which is applied in the direction of physical/chemical process catalysts, catalyst protection, chemical instruments and methods, etc., can solve the problems of large dosage and high cost of liquid passivation agents, and achieve simple operation and save start-up time , to avoid the effect of spontaneous response

Active Publication Date: 2021-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of liquid passivator is high and the dosage is large

Method used

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  • Method for passivating sulfurized hydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take the industrially produced hydrogenation catalyst and put it into the reactor, raise the pressure to 3.0MPa after airtightness is qualified, raise the temperature to 150°C at a rate of 30°C / h, introduce sulfurized oil, the sulfurized oil is catalytic gasoline, and use CS 2 As a vulcanizing agent, the content of the vulcanizing agent in the vulcanized oil is 2wt%, the distillation range ranges from 40 to 200°C, continue to heat up to 230°C, keep the temperature constant for 3 hours, then raise the temperature to 350°C, and keep the temperature constant for 3 hours to obtain the hydrogenation catalyst a in a sulfided state.

[0024] The sulfided hydrogenation catalyst a is sprayed and soaked in dodecene under the protection of nitrogen, the amount of dodecene is 30% (V) of the catalyst, the temperature is raised to 150°C, and nitrogen is purged, and the flow rate of nitrogen is 50L / h. After purging for 5 hours, cool down to room temperature, vacuumize the container con...

Embodiment 2

[0026] Under the protection of nitrogen, unsaturated impregnate anthraquinone ethanol solution with sulfided catalyst a, wherein the amount of anthraquinone is 50% (V) of the catalyst, anthraquinone: ethanol = 1:1, heat up to 80°C, blow with nitrogen Sweeping, the flow rate of nitrogen gas is 80L / h, after purging for 8h, cool down to 20°C, vacuumize the container containing the catalyst, the vacuum degree is -0.07MPa, then slowly lower the temperature to -20°C, introduce ozone-containing gas (containing The ozone gas is nitrogen with an ozone content of 3%), the gas pressure is 2.0MPa, the flow rate is 20L, and the gas is kept for 0.2h to obtain the finished catalyst B. After replacement with nitrogen gas, the catalyst B is taken out for use.

Embodiment 3

[0028] Take the industrially produced catalyst and put it into the reactor, raise the pressure to 7.0MPa after the airtightness is qualified, and replace it with hydrogen containing hydrogen sulfide gas. state catalyst b.

[0029] Put the catalyst b into the quinoline solution for 30 minutes and immerse it, drain it, and then heat-treat it under nitrogen for 2 hours at a treatment temperature of 100°C. Afterwards, the container containing the catalyst is evacuated to a vacuum degree of -0.1MPa, cooled to 0°C, and ozone-containing gas (ozone-containing gas is nitrogen with an ozone content of 1%) is introduced, the gas pressure is 2.0MPa, the flow rate is 6L, and the temperature is maintained at 0.5 h, the finished catalyst C is obtained, and the catalyst is taken out for use after replacing with nitrogen.

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Abstract

The invention discloses a method for passivating a sulfurized hydrogenation catalyst, which comprises the following steps: making the sulfurized hydrogenation catalyst contact with a liquid passivator, then conducting separating to obtain a solid-phase material, carrying out heat treatment on the solid-phase material, treating the obtained material under a vacuum condition, then treating the obtained material B in the presence of ozone-containing gas, and finally, conducting cooling in a nitrogen or inert atmosphere to obtain the passivated catalyst. The passivation method provided by the invention can prevent oxygen in air from further reacting with metal sulfide in the catalyst, avoids self-heating reaction of the catalyst, and improves the safety of storage, transportation and filling of the catalyst.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and relates to a treatment method and start-up method of a sulfided hydrogenation catalyst. Background technique [0002] Nowadays, the replacement of clean gasoline and diesel fuel is accelerating, and the oil refining industry is facing tremendous pressure to produce ultra-low sulfur gasoline and diesel. Hydroprocessing is one of the most efficient processes for producing clean fuels, and the activity of hydrogenation catalysts is key. How to improve catalyst activity and reduce production cost is a common topic for petrochemical enterprises. The active metal in the catalyst prepared by the complete presulfidation and passivation technology exists in the form of complete sulfuration. The passivated catalyst can be exposed to the air and added to the reactor. The hydrogenation unit can directly process the raw material oil and carry out normal operation without any preprocessing. The ful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J33/00C10G45/04
CPCB01J33/00C10G45/04C10G2300/705
Inventor 徐黎明高玉兰佟佳杨涛杨占林
Owner CHINA PETROLEUM & CHEM CORP
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