Chemistry-Products from oil Products from oil 2.0 / 5 based on 1 rating ? ChemistryCrude oil, cracking and hydrocarbonsGCSEAQA Created by: Jamie-Lee OliverCreated on: 10-03-13 15:01 Products from oil Cracking hydrocarbons Hydrocarbon molecules can be broken down by heating them with steam to a very high temperature or by passing their vapours over a hot catalyst Cracking products alkanes and alkenes Alkenes are unsaturated hydrocarbons Alkenes turn bromine water from orange to colourless 1 of 5 Products from oil Making polymers from alkenes Plastics are made of polymers Polymers are large molecules made when many small molecules (monomers) join together Alkenes can be useed to make polymers such as poly(ethene) and poly(propene) 2 of 5 Products from oil 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 3 of 5 Products from oil Plastic waste Non-biodegradable plastics cause 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 the microorganisms break down the plastic We can make biodegradable plastics from plant material such as cornstarch 4 of 5 Products from oil Ethanol Ethanol can be made by fermenting sugar using enzymes in yeast Ethanol can also be made by hydration of ethene with a steam in the presence of a catalyst Using ethene to make ethanol needs non-renewable crude oil whereas fermentation uses renewable plant materials 5 of 5
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