OMG, im doing this at the moment too!! lol!! We have to do it on "fractional distillation of crude oil" and "desalination of seawater." The sites I'm using to help me is: http://www.sydneywater.com.au/EnsuringTheFuture/Desalination/Factsheets.cfm and http://www.caltex.com.au/community_ref.asp