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Chemical industry has a large impact on our daily lives

" Green chemistry represents the pillars that hold up our sustainable future. It is imperative to teach the value of green chemistry to tomorrow's chemists." Daryle Busch, President ACS, June 26, 2000, “Color Me Green” Chem. Eng. News 2000, 78 (28) 49-55 .

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Chemical industry has a large impact on our daily lives

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  1. "Green chemistry represents the pillars that hold up our sustainable future. It is imperative to teach the value of green chemistry to tomorrow's chemists." Daryle Busch, President ACS, June 26, 2000, “Color Me Green” Chem. Eng. News 2000, 78 (28) 49-55.
  2. Chemical industry has a large impact on our daily lives “Green Chemistry is focused on the design and implementation of chemical technologies, processes and services that are safe, energy efficient and environmentally sustainable” http://www.greencentrecanada.com/green-chemistry/index.php#sthash.sShqFYTa.dpuf
  3. Green Chemistry Involves: Reducing or eliminating the use or production of hazardous substances in the manufacture of chemical products Considering the hazards of reagents as well as their properties A green chemical process or product is ‘benign by design’
  4. One section…
  5. Beginnings of Green Chemistry Pollution Prevention Act 1990 GC Began in 1991 at EPA, Paul Anastas 1996 Presidential Green Chemistry Challenge Awards 1996 Green Chemistry and Engineering Conference 1999 Journal “Green Chemistry” Chemical and Engineering News 2000 Journal of Chemical Education
  6. 12 Principles of Green Chemistry (Anastas, P. T.; Warner, J. C. Green Chemistry: Theory and Practice, Oxford University Press: New York, 1998, p.30. By permission of Oxford University Press) 1. Prevention It is better to prevent waste than to treat or clean up waste after it has been created. 2. Atom Economy Synthetic methods should be designed to maximize the incorporation of all materials used in the process into the final product. 3. Less Hazardous Chemical Syntheses Wherever practicable, synthetic methods should be designed to use and generate substances that possess little or no toxicity to human health and the environment. 4. Designing Safer Chemicals Chemical products should be designed to effect their desired function while minimizing their toxicity.
  7. 5. Safer Solvents and Auxiliaries The use of auxiliary substances (e.g., solvents, separation agents, etc.) should be made unnecessary wherever possible and innocuous when used. 6. Design for Energy Efficiency Energy requirements of chemical processes should be recognized for their environmental and economic impacts and should be minimized. If possible, synthetic methods should be conducted at ambient temperature and pressure. 7. Use of Renewable Feedstocks A raw material or feedstock should be renewable rather than depleting whenever technically and economically practicable. 8. Reduce Derivatives Unnecessary derivatization (use of blocking groups, protection/ deprotection, temporary modification of physical/chemical processes) should be minimized or avoided if possible, because such steps require additional reagents and can generate waste.
  8. 12 Principles of Green Chemistry 9. Catalysis Catalytic reagents (as selective as possible) are superior to stoichiometric reagents. 10. Design for Degradation Chemical products should be designed so that at the end of their function they break down into innocuous degradation products and do not persist in the environment. 11. Real-time analysis for Pollution Prevention Analytical methodologies need to be further developed to allow for real-time, in-process monitoring and control prior to the formation of hazardous substances. 12. Inherently Safer Chemistry for Accident Prevention Substances and the form of a substance used in a chemical process should be chosen to minimize the potential for chemical accidents, including releases, explosions, and fires.
  9. Green Chemistry Examples Green Fire Extinguishers Traditional fire extinguishers use chemical foam Foams have released toxic substances into the environment contaminating water supplies New Foam! Pyrocool FEF puts out fires without the toxic substances
  10. Green Dry Cleaning Most dry cleaners use perchloroethylene (perc) as the solvent to clean clothes Disposal can contaminate water and it is suspected of causing health concerns New solvent: Liquid CO2 Uses waste CO2 from other processes Now being used commercially
  11. Viagara Synthesis Reduction in solvent from 1300 L/kg to 7 L/kg Elimination of the solvent dichloromethane, CH2Cl2
  12. CH2CL2 Acetone Ethanol Methanol Ether Ethyl Acetate 2-Butanone Toluene Pyridine t-Butanol New solvent 4 L/kg Future Target 1300 L/kg Medicinal Chemistry 1990 100 L/kg Optimised Med. Chemistry 1994 22 L/kg Commercial Route (1997) 7 L/kg Commercial Route following solvent recovery Green Chemistry and the Synthesis of Viagra (Sildenafil)

  13. Plastic bags to batteries

    http://www.youtube.com/watch?v=q17Bd6tOMHI
  14. Green Chemistry Is About... Waste Materials Hazard Reducing Risk Energy Environmental Impact COST
  15. Summary Based on proven chemistry Cost effective More sustainable The future = A “win-win” for business and the environment
  16. Exemplar Green Chemistry Assignment Lego Schmego
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