Activating method for high-nickel catalyst

Abstract

The invention provides an activating method for a high-nickel catalyst. The activating method comprises following steps: S1, regeneration of the high-nickel catalyst: the high-nickel catalyst enteringthe last stage is added to a reaction kettle, temperature and pressure of the reaction kettle are controlled, an activating agent is introduced into the reaction kettle, the introduction time is notshorter than 36 h, the high-nickel catalyst is activated, after the activation is finished, the activating agent and the high-nickel catalyst are separated, the activated high-nickel catalyst and theused activating agent are obtained, and the activated high-nickel catalyst can be used again after vacuum drying; S2, regeneration of the activating agent: the used activating agent obtained by separation in the step S1 is regenerated with a distillation method, and the regenerated activating agent is applied to the regeneration of the high-nickel catalyst. The activating method has good activating effect on the high-nickel catalyst, molecular crystal form of the activated high-nickel catalyst is not changed obviously, pore channels have no apparent collapse, and the high-nickel catalyst can be continuously recycled for 8000-10000 h.

Description

technical field [0001] The invention relates to the field of catalyst activation methods, in particular to an activation method for high-nickel catalysts. Background technique [0002] High-nickel catalyst refers to a catalyst with a nickel content higher than 22%. It is often used as a catalyst for hydrogenation of oil products. Hydrogen, partial hydrogenation of monoenes, high-nickel catalysts have a service life of 12,000 hours, and at the end of the catalyst, the hydrogenation rate of dienes with high-nickel catalysts becomes low, and the hydrogenation of dienes is not complete, and the first reaction product cannot be used as a hydrogenation raw material. [0003] After the high-nickel catalyst enters the final stage, the product cannot meet the raw material requirements of the downstream process. At present, the most commonly used method is to replace the catalyst. After the catalyst is replaced, the precious metal can only be recycled to achieve reuse, and the reuse c...

AI Technical Summary

Problems solved by technology

[0002] High-nickel catalyst refers to a catalyst with a nickel content higher than 22%. It is often used as a catalyst for hydrogenation of oil products. Hydrogen, partial hydrogenation of monoenes, the service life of high-nickel catalysts is 12000h, at the end of the catalyst, the hydrogenation rate of dienes with high-nickel catalysts becomes lower, the hydrogenation of dienes is not complete, and the first reaction product cannot be used as a hydrogenation raw material

[0003] After the high-nickel catalyst enters the final stage, the product cannot meet the raw material requirements of the downstream process. At present, the most common method is to replace the catalyst. After the catalyst is replaced, it can only be reused by recycling the precious metals, and the reuse cost is relatively high.

Under the electron microscope, the nickel structure and pores of the catalyst have not been destructively destroyed, and the catalyst can be activated by regeneration. The traditional catalyst activation temperature is 450-520°C, but this method is for high-nickel catalysts. It is easy to cause the destruction of the high-nickel catalyst crystal form aggregation channels, which need to be regenerated by other methods

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