How to Separate Iron & Aluminum From Clay

Extracting iron and aluminum from clay requires advanced knowledge of scientific processes and access to restricted chemicals. Treatment of clays with hydrogen peroxide, acid ammonium oxalate and ultraviolet light replaced the extractant solution of acetic acid in the 1960s and remain an effective dissolution technique to this day. The process must be completed in a laboratory where these solutions and equipment are available, so novice artisans should not attempt to dig up clay in their yard and replicate this procedure.

Things You'll Need

• Rolling pin
• Hydrogen peroxide
• Acid ammonium oxalate
• Ultraviolet light

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Instructions

1. • 1

     Flatten the clay with a rolling pin until it is thin and uniform.

   • 2

     Immerse the clay in a hydrogen peroxide bath overnight to dissolve sulfides and common organic impurities.

   • 3

     Place the clay under ultraviolet light and allow to dry.

   • 4

     Treat the clay with acid ammonium oxalate to dissolve the iron and aluminum.

   • 5

     Run a magnet over the clay surface. Repeat the acid ammonium oxalate treatment as needed until the magnet no longer attracts any aluminum or iron shavings.

   • 6

     Turn the clay over and repeat the acid ammonium oxalate treatment.