products from oil

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  • Products from oil
    • Cracking hydrocarbons
      • Hydrocarbon molecules can be broken down by heatimg them with steam to a very high temp or by passing their vapours over a hot catalyst
      • Cracking produces alkenes and alkanes
      • Alkenes are unsaturated hydrocarbons
      • Alkenes tun bromine water from orange to colourless
    • Making polymers from alkenes
      • Plastic are made of polymers
      • Polymers are large molecules made when many small moelcules (monomers) join together
      • Alkenes can be used to make polymers such as poly(ethene) and poly(propane)
    • New and useful polymers
      • New polymers are being developed all the time
      • Polymers are designed to have properties that make them specially suited for certain uses
      • We are now recycling more plastics and finding new uses for them
    • Plastic waste
      • Non-biodegradable plastics casue unsightly rubbish, can harm wildlife and take up space in landfill sites
      • Biodegradable plastics are decomposed by the action of microorganisms in soil
      • Making plastics with starch granules in their structure helps microoganisms break down a plastic
      • We can make biodegradable plastics from plant material such as cornstarch
    • Ethanol
      • Ethanol can be made by fermenting sugar using enzymes in yeast
      • Ethanol can also be made by hydration of ethene with steam in the presence of a catalyst
      • Usimg ethene to make ethanol needs non-renewable crude oil whereas fermentation uses renewable plant material
  • Alkenes are unsaturated hydrocarbons


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