Silver Science - Hydrogen from Waste

  • Triethanolaminme (TEA) is used in some processes with this material. But I have found something that seems more effective and is also less able to bind to the hydroxide. Here you see two very similar samples -the one on the left is relatively pure aluminium, the one on the right is aluminium alloy with around 2.5% Cu - see how the copper is being solubilised giving a greenish tinge to the contents of the beaker.


  • Alan Smith i understood that impurities inside hydroxides were especially from another metals unexpected.

    Why only few of these impurities could disturb the mix because aluminium or copper, what is the difference ?

    Is there a market for some hydroxides which aren't focused on these impurities ? At other side, what are customer who need a very pure product, for example ?

  • The market for aluminium hydroxide is huge, over 70M tonnes/yr. It embraces all levels of purity too, from very impure 'brown hydroxide' with higher levels of Iron which are used for making Abrasives to 99,999% purity which is used in the process of making artificial gemstones. In between various purity and particle size types are used in catalysts, ceramics, refractories, dielectrics fireproofing, water treatment and cosmetics. The most valuable is 99.999% pure nano-hydroxide which can cost between €50 and €5000/kg depending on the exact crystalline structure..