Safe porous nickel catalyst activity recovering method

A technology of activity recovery and catalyst, which is applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of catalyst structure change and the difficulty of realizing the activity recovery method, and achieve easy industrial scale-up, The effect of safe operation, easy storage and transportation

Pending Publication Date: 2021-11-16
TIANJIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, the addition of the oxidizing agent leads to serious changes in the structure of the catalyst after oxidation, and the activity recovery after reduction can only restore 50% of the activity.
In

Method used

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  • Safe porous nickel catalyst activity recovering method
  • Safe porous nickel catalyst activity recovering method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1

[0014] The ratio of 200-400 mesh metal powder (an average particle size 50 μm) was broken by a smelting of different nickel and aluminum raw materials, and finally 0.5 M NaOH phase peeling forming a safety porous nickel catalyst. The reaction performance is shown in Table 1 directly applied it.

[0015] Table 1

[0016]

Example Embodiment

[0017] Example 2

[0018] After the first catalyst, after dry dry, the active recovery experiment of different conditions was carried out. After recovery, the evaluation of the hydrogenation performance of phenylacetyhytallic temperature, the reaction performance and the active recovery rate (after drying, after drying) Before the activity recovery, the conversion efficiency of phenylacetylene is 0.4h. -1 , Styrene selectivity 90.2%). The active recovery rate is a ratio of reaction performance data (Table 2TOF) relative to the direct application of the active recovery rate (Table 1TOF).

[0019] Table 2

[0020]

Example Embodiment

[0021] Example 3

[0022] The first safety porous nickel catalyst prepared above is selected from the normal temperature of the 1,4-butyniiol (1,4-butyni glycol concentration of 1% by weight, water is a solvent, reaction 4h), its conversion rate was 72.6%, and the selectivity of 1,4-butene diol was 92.8%. If you dry it, in h 2 After 400 ° C under reduction of 400 ° C and 0.01 M NaOH alkali wasiantially activated, the conversion of 1,4-butynikanol was 71.1%, and the active recovery rate was 98%.

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Abstract

The invention provides a safe porous nickel catalyst activity recovering method, which comprises the following steps of: drying the safe porous nickel catalyst obtained by phase stripping, and recovering the activity of the safe porous nickel catalyst by adopting a gas-phase reduction or/and liquid-phase cleaning mode, so that the performance of the safe porous nickel catalyst is equivalent to that of an initial catalyst. Compared with a traditional Raney nickel catalyst, operation is safe, storage and transportation are easy, the activity recovery method is simple in process, and industrial amplification is easy.

Description

technical field [0001] The invention belongs to the technical field of new material preparation and relates to a method for restoring the activity of a safe porous nickel catalyst. Background technique [0002] Although the industrial Raney nickel (Raney Ni) catalyst has high activity and is widely used, it is easy to burn in the air, so it needs to be stored in a liquid seal, and there are safety hazards in the operation process, and the transportation cost increases. Therefore, the development of a safe porous nickel catalyst is to important. [0003] The applicant disclosed a safe porous nickel catalyst in the patent CN202110310290.X. The catalyst exhibits significantly better performance than traditional Raney nickel in many reactions. However, after the catalyst is dried, its catalytic activity is greatly reduced, so it is necessary to develop a method to restore the activity. [0004] In order to facilitate storage, industrial Raney nickel catalysts are often treated...

Claims

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Application Information

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IPC IPC(8): B01J38/60B01J38/64B01J38/10B01J38/04B01J23/755B01J23/94B01J35/02B01J35/10C07C29/17C07C33/035
CPCB01J38/60B01J23/94B01J38/64B01J23/755B01J23/002B01J35/1014B01J35/1061B01J35/023B01J38/10B01J38/04C07C29/17C07C33/035Y02P20/584
Inventor 肖子辉阚洪寅刘江云印会鸣丁轶
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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