Activating method for high-nickel catalyst

An activation method and catalyst technology, which can be used in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., and can solve the problems of low diene hydrogenation rate, usage, incomplete diene hydrogenation, etc. , to achieve the effect of prolonged time and low cost

Inactive Publication Date: 2018-11-16
濮阳市联众兴业化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Effect test

Embodiment 1

[0026] A kind of high-nickel catalyst activation method that the present invention proposes comprises the following steps:

[0027] S1. Regeneration of high-nickel catalyst: Add the high-nickel catalyst that has entered the final stage into the reactor, and control the temperature of the reactor to 220 ° C, the pressure to 2.5 MPa, and feed C4 saturated alkane for 72 hours. Activation of the high-nickel catalyst, after the activation is completed, the activator and the high-nickel catalyst are separated to obtain the activated high-nickel catalyst and the used activator, and the activated high-nickel catalyst can be reused after vacuum drying;

[0028] S2. Regeneration of the activator: the used activator separated in step S1 is regenerated by rectification, and the regenerated activator is used for regeneration of the high-nickel catalyst.

Embodiment 2

[0030] A kind of high-nickel catalyst activation method that the present invention proposes comprises the following steps:

[0031] S1. Regeneration of high-nickel catalyst: Add the high-nickel catalyst that has entered the final stage into the reactor, and control the temperature of the reactor to 220 ° C, the pressure to 2.5 MPa, and feed C8 saturated alkane for 36 hours. Activation of the high-nickel catalyst, after the activation is completed, the activator and the high-nickel catalyst are separated to obtain the activated high-nickel catalyst and the used activator, and the activated high-nickel catalyst can be reused after vacuum drying;

[0032] S2. Regeneration of the activator: the used activator separated in step S1 is regenerated by rectification, and the regenerated activator is used for regeneration of the high-nickel catalyst.

Embodiment 3

[0034] A kind of high-nickel catalyst activation method that the present invention proposes comprises the following steps:

[0035] S1. Regeneration of high-nickel catalyst: Add the high-nickel catalyst that has entered the final stage into the reactor, and control the temperature of the reactor to 180°C, the pressure to 2.5MPa, and feed hydrogen with a purity of more than 99% for a time of After 48 hours, activate the high-nickel catalyst. After the activation is completed, separate the activator from the high-nickel catalyst to obtain the activated high-nickel catalyst and the used activator. The activated high-nickel catalyst can be vacuum-dried use again;

[0036] S2. Regeneration of the activator: the used activator separated in step S1 is regenerated by rectification, and the regenerated activator is used for regeneration of the high-nickel catalyst.

[0037] In the present invention, it is equipped with a filter buffer tank and a supporting hydrogen torch system. If th...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/10B01J38/04
CPCB01J38/04B01J38/10
Inventor 鲁少飞武建庆游倩倩张文生张立新张文魁张怀敏
Owner 濮阳市联众兴业化工有限公司
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