Technologies
Title: | Recovery of Nickel from Spent Nickel Catalyst |
Area: | 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 |
Email: | director@nmlindia.org |
| Website Link : | http://www.nmlindia.org |
| Source (more info) : | https://t.ly/l_sb |
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. |