INTRODUCTION:
This is the special form of Nickel which comprises of finely divided spongy Nickel particles prepared by leaching out Aluminium under controlled conditions from a Nickel-Aluminium Alloy by treating the alloy in its powder form with a concentrated solution of caustic soda. The slurry of finely divided spongy Nickel particles so obtained is washed with large quantities of water till its nearly free from free caustic. Raney Nickel is highly pyrophoric when dry i.e. catches fire when allowed to dry in atmosphere so, it is always kept submerged under water or a suitable solvent such as Ethanol, Cyclohexane, Dioxane etc. the commercial transactions done on dry weight basis. Raney Nickel cannot be used in acidic reaction conditions below pH 5.5 because at that pH fine Nickel particles will start dissolving in the reactant/solvent, leading to rapid decline in activity.
USES / APPLICATIONS:
This special form of spongy, finely divided Nickel is a very powerful and versatile Hydrogenation Catalyst and is used in Hydrogenation of large number of functional groups notable among them being Carbon- Carbon double bond, Carbonyl (aldehydic and ketonic), Nitro, Azide, Nitrile, Oxime groups. Raney Nickel Catalyst is also used in foods, pharmaceuticals, aromatic, petrochemicals, sorbitol, rubber additives, dyes & drugs intermediates, pesticide intermediates, Caprolactum, fine organic chemicals industries and Hydrogenolysis (viz dehalogenation, debenzylation) and Desulfurisation reactions and it can be used in batch as well as in continuous hydrogenation process.
It can also be used in hydrogenation reactions involving very high pressure and temperature. Due to its ability to hydrogenate virtually any type of functional group Raney Nickel is likely to hydrogenate most of the functional groups present on the molecule (of course to varying degrees) capable of getting hydrogenated, therefore its termed as non-specific catalyst.
Unlike most other Hydrogenation catalysts, Raney Nickel Catalyst is not instantly poisoned by sulfur radicals if present in the reactants. However, finely divided Nickel particles due to strong affinity for sulfur instantly react with sulfur present in any form in the molecule of the reactant, due to its special property Raney Nickel is frequently used for desulfurization & dehydrogenation reactions.
ADVANTAGES:
- Activated and ready to use.
- Accelerated settling properties resulting in improved filtration from product due to high density.
- Versatile use in wide range of hydrogenations.
- Large surface skeleton structure to impart high activity.
- Replacement of precious metal catalyst.
- Resistance to poisoning and sintering.
Grades of Raney Nickel Catalyst (Active):
Himalaya Industries., manufacturers different grades which are coded as HimCat-1926, HimCat-1981 & HimCat-2016 based on our customers need. The Technical Specifications for these grades can be obtained by contacting our manufacturing site.
Company has capability of making Raney Nickel as per customer’s specification such as very low activity, less pyrophoric, neutral pH, low slurry density, high slurry density, special for Carbazole, special for de-sulfurisation, Molybdenum or Chromium promoted catalyst. Our catalysts are easy to filter and are guarded against small amounts of oxidants.
Quality:
Himalaya Industries is completely dedicated to improve the quality of the catalyst by continuous efforts and endeavors to retain and fortify the trust of our customers by ensuring that the best quality of the Raney Nickel Catalyst is delivered its Quality Management System ensure strict adherence to standard operating procedures while research and development meets the challenges in the areas of customized product development, improvement in quality, aspects & production processes.
Reactivation of Spent Raney Nickel Catalyst:
We have developed techniques of reactivation of spent catalyst and the job work is undertaken on commercial basis in our associate Company at Metal Chem, Badlapur.