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    Ajay S. Satpute

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Chemical and Process Engineering Resources

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Category: ChE Outside the Plant
Question: What is an effective means of removing silicon from aluminum?
Keywords: v1i3,cleaning,silicon
Answer: Your question is a good one. Silicon is well known for its chemical inertness, (ie. it tends to not react with many other chemicals). Depending on what type of silicon your dealing with, this may or may not be easy to solve. If the silicon is from a lubricant, it's probably the graphitic form which is soluble in a strong combination of nitric and hydrofluoric acids, neither of which I would recommend for you to use...and hydroflouric acid is not easy to come by. If it's silicon from an acidic form (probably any other form other than a lubricant), you should try ammonia. In either case, leave your acetone at home...it will NEVER work!UPDATE:An ammonia solution worked very well in this case