Application of glucose hydrogenation catalyst in sorbitol production


Application of glucose hydrogenation catalyst in sorbitol production
   
ZL-N311 sugar alcohol hydrogenation catalyst is a substitute for traditional Rainey nickel catalyst, the initial hydrogen absorption temperature and pressure are significantly lower than Rainey nickel, for carbonyl hydrogenation has special activity, can achieve high conversion, high selectivity sugar alcohol hydrogenation reaction, especially suitable for glucose hydrogenation to prepare sorbitol process, the product has been successfully applied in many large sugar alcohol plants in China, in the hydrogen absorption rate, activity stability and continuity, catalyst unit consumption are better than similar domestic catalysts.
  
By providing catalyst use schemes, analysis and testing technology, excellent product performance and perfect after-sales service, it has been recognized and praised by many customers, and is the catalyst for the hydrogenation reaction of the majority of sugar alcohol plants.

 

 

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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.