Caprolactam hydrorefining industrial applications

ZL-N411/ SRNA-4 amorphous aluminum-nickel alloy catalyst has excellent performance in caprolactam hydrorefining industry, successfully replaces the traditional Raney nickel catalyst, and reaches and exceeds the level of similar catalysts imported and foreign in industrial applications.
This product is the first prize of national scientific and technological invention product, can also be used for magnetically stable bed and fluidized bed caprolactam hydrorefining, the unsaturated impurities through hydrogenation into saturated impurities, the finished caprolactam excellent grade rate of 100%, so that caprolactam can be used for high-speed spinning production products.
Our company is a designated A grade product supplier of Sinopec. At present, all domestic caprolactam manufacturers adopt ZL-N411/ SRNA-4 amorphous alloy hydrogenation catalyst produced by our company, which has stable long-term running performance, low single consumption, excellent products, and has been recognized by the majority of users.



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Reni nickel catalyst science knowledge(1)

Physical and chemical properties: Reni nickel catalyst before activation is silver-gray amorphous powder (nickel-aluminum alloy powder), with a moderate degree of flammability, partial activation in the presence of water and the production of hydrogen easy agglomeration, long-term exposure to air is easy to weather. Nickel-aluminum alloy powder is activated into gray-black particles, accompanied by active hydrogen, extremely unstable, oxidative combustion in the air, must be immersed in water or ethanol for preservation. It was first used by American engineer Murray Rainey as a catalyst in the hydrogenation of vegetable oils. The preparation process is to treat nickel-aluminum alloy with concentrated sodium hydroxide solution, in this process, most of the aluminum will react with sodium hydroxide and dissolve, leaving a lot of micropores of different sizes. In this way, the surface of Raininickel is a fine gray powder, but from a microscopic point of view, each tiny particle in the powder is a three-dimensional porous structure, this porous structure greatly increases its surface area, and the large surface area brings high catalytic activity, which makes Raininickel widely used as a heterogeneous catalyst in organic synthesis and industrial hydrogenation reactions. Since "Rainey" is a registered trademark of Grace Chemicals, strictly speaking, only products manufactured by the company's Davidson Chemical Division can be called "Lanny Nickel". The term "metal backbone catalyst" or "sponge-metal catalyst" is used to refer to catalysts with a microporous structure and physical and chemical properties similar to Raney nickel.