Chemical Sciences, Material Sciences


Recovery of Nickel from Spent Nickel Catalyst


Chemical Sciences, Material Sciences

Focus Area:

Nickel Recovery

Social Benefits:

The advantages of this technology have been realized more in steel making industries.

Developing Agency:

CSIR-National Metallurgical Laboratory (NML), Jharkhand

Technology Readiness Index:

Technology Development

Website Link :
Source (more info) :

Brief Description

Description :

Nickel catalysts used in various operations become spent after several cycles of use, for which a very simple and innovative process is developed at NML for recovery of nickel. The processing step consists of direct acid leaching in the presence of a promoter followed by impurity removal to produce nickel salt/metal. The novelty of the process is that it gives very high nickel recovery (99%) under the moderate conditions in presence of a little quantity of a promoter without which it is found to be very poor even at higher temperatures and acid concentration. High purity alumina is produced from the process as a part of the leached residue. A smelting process is also developed for recovery of nickel as ferronickel from a variety of spent catalysts containing nickel in the range 8-25%. Various grades of ferronickel with a nickel content in the range of 20% to 80% have been produced.

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