Green chemistry final after film

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Green Chemistry Sponsored by: “ Chemistry has an important role to play in achieving a sustainable civilization on earth.” — Dr Terry Collins, Professor of Chemistry Carnegie Mellon University Definition Green chemistry is the design of products and processes reducing or eliminating hazardous substances Green Chemistry is a subset of Design for Environment applying innovative scientific solutions to product manufacturing Definition: An Industry Example Shaw’s Green Chemistry Goals  Develop a sustainable thermopolymer platform for the future  Cradle to cradle sustainability of face fiber and backing—100% of the product  No increase in price No sacrifice of performance No loss of design variety GREEN CHEMISTRY SUPPORTS SUSTAINABILITY BY: • Making chemicals safe for our health & environment, • Using industrial processes that reduce or eliminate hazardous chemicals, & • Designing more efficient processes that minimize waste GREEN CHEMISTRY MEANS… • Preventing pollution before it happens rather than cleaning up the mess later • Saving companies money by using less energy and fewer/safer chemicals, thus reducing costs & impacts of pollution • Mitigating climate change, water & resource depletion, & growing demands for safer food and cleaner energy Green Chemistry Principles Prevention: it is best to prevent pollution/waste Atom Economy: synthetic methods should maximize the incorporation of all materials used in the process into the final product Less Hazardous Chemical Syntheses: synthetic methods should use and generate non toxic substances Green Chemistry Principles 4,5,6 Designing Safer Chemicals: products should be nontoxic & designed to effect their desired function Safer Solvents and Auxiliaries: auxiliary substances (e.g., solvents, separation agents) should be avoided and innocuous when used Design for Energy Efficiency: Run chemical reactions at ambient temperature and pressure Green Chemistry Principles 7,8 Use of Renewable Feedstocks: raw material or feedstock should be renewable rather than depleting Reduce Derivatives: Avoid unnecessary derivatization (use of blocking groups, protection/deprotection, temporary modification of physical/chemical processes) because such steps require additional reagents and can generate waste Green Chemistry Principles 9,10 Catalysis: Catalytic reagents (as selective as possible) are superior to stoichiometric reagents which are used in excess and work only once 10 Design for Degradation: Chemical products should be designed so that at the end of their function they break down into innocuous degradation products Green Chemistry Principles 11,12 11 Analyze in real time to prevent pollution: Include in-process real-time monitoring and control during syntheses to minimize or eliminate byproducts 12 Minimize accidents: Design chemicals and their forms (solid, liquid, gas) to minimize the potential for chemical accidents, releases, explosions, and fires Presidential Green Chemistry Award Recognizing Product Excellence: Presidential Green Chemistry Award Recipient Shaw EcoWorx™ Carpet Tile    Sustainable thermoplastic platform for the future Closed-loop recovery of face yarn and all backing components No increase in price and no loss of performance or variety http://www.epa.gov/greenchemistry/dsca03.html Shaw Industries is the world’s largest manufacturer of carpets for home and business – and leader in sustainability TetraAmidoMacrocyclic Ligand or TAML® Activators Y n– O N X N X III Fe N O R N O R O Oxidize catalyst until cup “breaks” Design molecular “cup” thought to be suitable for attaining longlived catalysts The Design Protocol That Led to TAML® Catalysts Characterize broken cup and identify breaking point Modify weak site to be more robust Designing Ligands for Oxidizing Complexes, T J Collins A ccounts Chem Res., 1994, 27, 279-285 TAML® Oxidant Activators: A New Approach to the Activation of H2O2 for Environmentally Significant Problems, T J Collins A ccounts Chem Res., 2002, 35, 782-790 TAML® Catalyst Features • formed from biochemically common elements – prototype exhibits v low toxicity • beginning of “dial-a-lifetime” catalysis • economical to synthesize • water-soluble • usable from pH to 13 • efficient users of peroxide —fast peroxidase/slow catalase • 10 US patents, >70 counting foreign nationalizations • effective at 0.1 to ppm = nM to low µM • amenable to modifications for capturing novel selectivity • currently being produced for small scale commercial uses TAML® Activators Are Broadly Useful Oxidation Catalysts TEXTILES dye bleaching, effluent decolorization PULP AND PAPER pulp bleaching, effluent AOX and color removal WATER CLEANING halogenated aromatics and organics destruction LAUNDRY Dye transfer inhibition, stain removal plus PETROLEUM REFINING rapid oxidation of sulfur contaminants, other uses CHEM/BIO DEFENSE Rapid destruction of chem-bio Recognizing Product Excellence: Presidential Green Chemistry Award Recipient Shaw EcoWorx Carpet     PVC & polyurethane substitute for carpet backing Made from nontoxic polyolefin Recyclable & contains fewer harmful chemicals http://www.epa.gov/greenchemi stry/dsca03.html EcoWorx™ Production Production ($) 80,000,000 Production (SY) 60,000,000 4000000 40,000,000 3000000 Production ($) 2000000 20,000,000 Production (SY) 1000000 0 1998 2000 1999 1999 2000 2001 2001 2002 20022003 EcoWorx represented 70% of all carpet tile production at Shaw by the end of 2003 In June 2004 Shaw announced it would exit PVC use by year-end in favor of the EcoWorx sustainable metallacene catalyzed polyolefin compound Backing Chemistry •LDPE - flexible base polymer •HDPE/MAH adhesion and filler compatibility •Alaphatic tackifier adhesion and flow modification •Coal Fly Ash – inorganic filler •Oil – adhesive compatibilizer EcoWorx™ Carpet Tile Grinding and airflow separate backing from fiber for sustainable recycling Fiber Chemistry •Nylon – caprolactam monomer •25% postindustrial recycled content •Over 20 million lbs of recovered nylon used in 2003 •N6 depolymerization by Honey-well •recovered caprolactam repolymerized IN SUMMARY, GREEN CHEMISTRY IS… • Scientifically sound • Cost effective & • Leads toward a sustainable civilization For further information on real world green chemistry http://www.chemistry.org/portal/a/c/s/1/acsdisplay.html? DOC=education\greenchem\cases.html For introductory readings in green chemistry http://www/chemistry.org/portal/a/c/s/1/ acsdisplay.html?DOC=education\greenchem\greenreader.html Thanks to the Sponsors: [...]... IN SUMMARY, GREEN CHEMISTRY IS… • Scientifically sound • Cost effective & • Leads toward a sustainable civilization For further information on real world green chemistry http://www .chemistry. org/portal/a/c/s/1/acsdisplay.html? DOC=education\greenchem\cases.html For introductory readings in green chemistry http://www /chemistry. org/portal/a/c/s/1/ acsdisplay.html?DOC=education\greenchem\greenreader.html... degradation products Green Chemistry Principles 11,12 11 Analyze in real time to prevent pollution: Include in-process real-time monitoring and control during syntheses to minimize or eliminate byproducts 12 Minimize accidents: Design chemicals and their forms (solid, liquid, gas) to minimize the potential for chemical accidents, releases, explosions, and fires Presidential Green Chemistry Award Recognizing... Presidential Green Chemistry Award Recognizing Product Excellence: Presidential Green Chemistry Award Recipient Shaw EcoWorx™ Carpet Tile    Sustainable thermoplastic platform for the future Closed-loop recovery of face yarn and all backing components No increase in price and no loss of performance or variety http://www.epa.gov/greenchemistry/dsca03.html Shaw Industries is the world’s largest manufacturer.. .Green Chemistry Principles 7,8 7 Use of Renewable Feedstocks: raw material or feedstock should be renewable rather than depleting 8 Reduce Derivatives: Avoid unnecessary derivatization (use of blocking groups, protection/deprotection, temporary modification of physical/chemical processes) because such steps require additional reagents and can generate waste Green Chemistry Principles... other uses CHEM/BIO DEFENSE Rapid destruction of chem-bio Recognizing Product Excellence: Presidential Green Chemistry Award Recipient Shaw EcoWorx Carpet     PVC & polyurethane substitute for carpet backing Made from nontoxic polyolefin Recyclable & contains fewer harmful chemicals http://www.epa.gov/greenchemi stry/dsca03.html EcoWorx™ Production Production ($) 80,000,000 Production (SY) 60,000,000... metallacene catalyzed polyolefin compound Backing Chemistry •LDPE - flexible base polymer •HDPE/MAH adhesion and filler compatibility •Alaphatic tackifier adhesion and flow modification •Coal Fly Ash – inorganic filler •Oil – adhesive compatibilizer EcoWorx™ Carpet Tile Grinding and airflow separate backing from fiber for sustainable recycling Fiber Chemistry •Nylon 6 – caprolactam monomer •25% postindustrial
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