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Principles of green chemistry• Catalysis and green chemistry• Ionic liquid as green solvent• Water as green solvent• Supercritical CO2 as green solvent• Chemistry in micro reactor• Microwaveassisted chemistry• Ultrasoundassisted chemistry• Renewable materials green energy• Seminars: During the seminar hours, students areasked to join the discussion effectively under thesupervision of the course instructor.Principles of green chemistry• Catalysis and green chemistry• Ionic liquid as green solvent• Water as green solvent• Supercritical CO2 as green solvent• Chemistry in micro reactor• Microwaveassisted chemistry• Ultrasoundassisted chemistry• Renewable materials green energy• Seminars: During the seminar hours, students areasked to join the discussion effectively under thesupervision of the course instructor.Principles of green chemistry• Catalysis and green chemistry• Ionic liquid as green solvent• Water as green solvent• Supercritical CO2 as green solvent• Chemistry in micro reactor• Microwaveassisted chemistry• Ultrasoundassisted chemistry• Renewable materials green energy• Seminars: During the seminar hours, students areasked to join the discussion effectively under thesupervision of the course instructor.
GREEN CHEMISTRY Dr Nam T S Phan Faculty of Chemical Engineering HCMC University of Technology Office: room 211, B2 Building Phone: 38647256 ext 5681 Email: ptsnam@hcmut.edu.vn REFERENCES Mukesh Doble, Anil K Kruthiventi, ‘Green chemistry and processes, Elsevier, Oxford, 2007 Pietro Tundo, Alvise Perosa, Fulvio Zecchini, ‘Methods and reagents for green chemistry’, Wiley & Sons, New Jersey, 2007 Roger Arthur Sheldon, Isabel Arends, Ulf Hanefeld, ‘Green chemistry and catalysis’, Wiley-VCH Verlag GmbH, Weinheim, 2007 James Clark, Duncan Macquarrie, ‘Handbook of green chemistry and technology’, Blackwell Science Ltd, Oxford, 2002 Andre Loupy, ‘Microwaves in organic synthesis’, Wiley-VCH Verlag GmbH, Weinheim, 2002 Timothy J Mason, John P Lorimer, ‘Applied sonochemistry: Uses of power ultrasound in chemistry and processing’, WileyVCH Verlag GmbH, Weinheim, 2002 Peter Wasserscheid, Thomas Welton, ‘Ionic liquids in synthesis’, Wiley-VCH Verlag GmbH, Weinheim, 2002 Nam T S Phan, ‘Green Chemistry’, VNU-HCM Publisher, 2014 COURSE OUTLINE • • • • • • • • • • Principles of green chemistry Catalysis and green chemistry Ionic liquid as green solvent Water as green solvent Supercritical CO2 as green solvent Chemistry in micro reactor Microwave-assisted chemistry Ultrasound-assisted chemistry Renewable materials/ green energy Seminars: During the seminar hours, students are asked to join the discussion effectively under the supervision of the course instructor Chapter 1: PRINCIPLES OF GREEN CHEMISTRY What does the Chemical Industry for us? What does the Chemical Industry for us? What does the Chemical Industry for us? What does the Chemical Industry for us? What does the Chemical Industry for us? What does the Chemical Industry for us? What does the Chemical Industry for us? 10 What is green chemistry? • The design of chemical products & processes that reduce or eliminate the use or generation of hazardous substances • Discovery & application of new chemistry / technology leading to prevention / reduction of environmental, health & safety impacts at source 23 History • Pollution Prevention Act 1990 • Green chemistry Began in 1991 at Environmental Protection Agency, Paul Anastas • 1996 Presidential Green Chemistry Challenge Awards • 1997 Green Chemistry and Engineering Conference • 1999 Journal “Green Chemistry” • Chemical & Engineering News • 2001 Journal of Chemical Education 24 12 Principles of green chemistry (Paul Anastas & John Warner) Prevent waste: Design chemical syntheses to prevent waste, leaving no waste to treat or clean up 25 Pollution Prevention Hierarchy 26 Design safer chemicals and products: Design chemical products to be fully effective, yet have little or no toxicity Design less hazardous chemical syntheses: Design syntheses to use and generate substances with little or no toxicity to humans and the environment 27 Use renewable feedstocks: Use raw materials and feedstocks that are renewable rather than depleting Renewable feedstocks are often made from agricultural products or are the wastes of other processes; depleting feedstocks are made from fossil fuels (petroleum, natural gas, or coal) or are mined 28 29 5.Use catalysts, not stoichiometric reagents: Minimize waste by using catalytic reactions Catalysts are used in small amounts and can carry out a single reaction many times They are preferable to stoichiometric reagents, which are used in excess and work only once 30 Avoid chemical derivatives: Avoid using blocking or protecting groups or any temporary modifications if possible Derivatives use additional reagents and generate waste Maximize atom economy: Design syntheses so that the final product contains the maximum proportion of the starting materials There should be few, if any, wasted atoms 31 Use safer solvents and reaction conditions: Avoid using solvents, separation agents, or other auxiliary chemicals If these chemicals are necessary, use innocuous chemicals 32 9.Increase energy efficiency: Run chemical reactions at ambient temperature and pressure whenever possible 10 Design chemicals and products to degrade after use: Design chemical products to break down to innocuous substances after use so 33 that they not accumulate in the environment 11.Analyze in real time to prevent pollution: Include in-process realtime monitoring and control during syntheses to minimize or eliminate the formation of byproducts 34 12 Minimize the potential for accidents: Design chemicals and their forms (solid, liquid, or gas) to minimize the potential for chemical accidents including explosions, fires, and releases to the environment 35 Condensed Principles of green chemistry (Samantha Tang, Richard Smith and Martyn Poliakoff ) P – Prevent wastes R – Renewable materials O – Omit derivatization steps D – Degradable chemical products U – Use safe synthetic methods C – Catalytic reagents T – temperature, pressure ambient I – In-process monitoring V – Very few auxiliary substances E – E-factor, maximize feed in product • L – Low toxicity of chemical products • Y – Yes, it is safe • • • • • • • • • • Productively !!! 36 Green chemistry is about: Waste Materials Hazard Reducing Risk Energy Environmental Impact COST 37 ... students are asked to join the discussion effectively under the supervision of the course instructor Chapter 1: PRINCIPLES OF GREEN CHEMISTRY What does the Chemical Industry for us? 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