Dehydrogenation of methanol to formaldehyde is done at 600–720 °C above silver gauze or crystals as being the catalyst, as is dehydrogenation of isopropanol to acetone. In the gasoline period, glycol yields glyoxal and ethanol yields acetaldehyde, whilst natural amines are dehydrated to nitriles.[a hundred and twenty] Images Encyclopaedia Britannica's http://tecfinance.de/maximieren-sie-ihren-gewinn-tipps-fur-den-erfolgreichen-silberverkauf/