Raney Nickel Catalyst (Active)

 

Raney Nickel Catalyst (Active)

 


It is a special form of Nickel which comprise of finely divided spongy Nickel particles prepared by leaching out Aluminium under controlled conditions from a Nickel – Aluminium Alloy through wet chemical method. The product is always kept submerged under water or suitable solvent and accordingly, Raney Nickel is marketed and delivered in that form, i. e slurry form. The slurry particles are likely to catch fire, i.e turn pyrophoric if separated from water or solvent and allowed to dry in atmosphere.

This special form of spongy, finely divided Nickel is a very powerful hydrogenation catalyst. This form of Nickel was first produced by an American engineer – Murray Raney in 1927. Unlike most other hydrogenation catalysts it is not instantly poisoned by sulphur radicals, if present in the reactants.

Raney Nickel is a versatile hydrogenation catalyst and is used in hydrogenation of large number of functional groups. Notable among them being Carbon – Carbon double bond, aldehydic, ketonic, nitro, azide, oxime, nitrile groups. It is also used in hydrogenolysis ( viz dehalogenation, debenzylation) and desulfurisation reactions. Due to its ability to hydrogenate virtually any type of functional group Raney Nickel is termed as non-specific catalyst.

Raney Nickel can also be used in hydrogenation reactions involving very high pressure and temperature. Raney Nickel catalyst however cannot be used for hydrogenation where reaction conditions are acidic in nature, i.e pH < 5. Catalyst loading may vary from as low as 0.5 % to as high as 100 % of the substrate and some times even more depending upon nature of hydrogenation and the substrates involved.

Raney Nickel can also be used for dehydrogenation reactions.

Vineeth Chemicals produces three common varieties of Raney Nickel Catalyst, viz, fine, medium and coarse based upon particle size of the slurry which indirectly correspond respectively to high (comparable to W6), medium (comparable to W3, W4 & W5) and moderate (comparable to W1, W2) activity catalysts. The quality of Raney Nickel produced by the company, compares well with the makes of international repute. Besides, fine, medium and coarse grade, the company has capability of making Raney Nickel as per customer’s specification such as very low activity, non-pyrophoric, neutral pH, low slurry density, high slurry density, Molybdenum or Chromium promoted catalyst. Our catalysts are easy to filter and are guarded against small amounts of oxidants.

The assured shelf life of the product is three months from the date of manufacture.

Notable users are Pesticides, Dyes, Drugs, Perfumery Compounds, Sorbitol, Rubber additives manufacturers besides host of other fine chemical manufacturers. 

Raney Nickel being pyrophoric in nature should be handled with great care. Only skilled and trained persons with adequate safety measures should be deployed for handling this product.

The standard packing is 5 Kgs and 10 Kgs in M.S Drums or HDPE Drums. The packing size however can be tailored to customers specific requirements.

We have developed techniques of reactivation of spent catalyst and the job work is undertaken on commercial basis. Use of reactivated catalyst can substantially reduce the cost of hydrogenation. It should however be noted that use of reactivated Raney Nickel Catalyst should be restricted to the specific products alone from which the spent got generated. Further, when the intention is to recycle the catalyst or get it reactivated, it should always be kept submerged under water or solvent and pH be maintained ~ 10.

For further details please feel free to contact General Manager, Vineeth Chemicals.


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