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Nicola Keithley

Green chemistry. Nicola Keithley. GREEN CHEMISTRY.

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Nicola Keithley

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  1. Green chemistry Nicola Keithley

  2. GREEN CHEMISTRY Green chemistry contains products to reduce or eliminate hazardous substances. One of green chemistries goals is to prevent pollution at its source, differentiating to dealing with pollution after it has occurred. Green chemistry isn't a theory, it’s a philosophy that arose from necessity. It shows the consequences of using particular reactants, or allowing certain products to get into the environment.

  3. The 12 principles • Prevent waste- rather then create it. • Design safer chemicals- synthetic methods to maximise the incorporation of all materials • Find safer ways to make synthetic products- posses little or no toxicity to human health and the environment • Maximise atom economy- minimising toxicity • Use safer solvents- auxiliary substances to be made unnecessary • Use renewable reactants- reusing unused reactants

  4. THE 12 PRINCIPLES • 7. Maximise energy efficiency- renewing a raw material or feedstock • 8. Avoid chemical derivatives- avoided if possible • 9. Use catalysts whenever possible- their superior to stoichiometric reagents • 10. Design biodegradable products- so they break down once used • 11. Use real-time analysis to prevent pollution- in-process monitoring and control • 12. Minimise the potential for accidents- including releases, explosions and fires.

  5. CASE STUDY • Virent discovered and is currently developing an initiative green synthetic pathway which converts plant sugars into conventional hydrocarbon fuels and chemicals. They combine proprietary aqueous- phrase reforming technology with established petrol refining techniques to generate the same range of hydrocarbon molecules now refined from petroleum. • This is a design of safer chemicals as it minimises the potential for accidents and it uses renewable reactants, minimising the impact on global water and food supplies.

  6. BIBLIOGRAPHY • http://portal.acs.org/portal/acs/corg/content?_nfpb=true&_pageLabel=PP_ARTICLEMAIN&node_id=1415&content_id=WPCP_007504&use_sec=true&sec_url_var=region1&__uuid=f9df12e8-afcc-439d-87fb-1301a9197c21 • http://www.epa.gov/greenchemistry/pubs/pgcc/winners/sba09.html • Science detentions 4- yr. 10 book

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