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.
Trang 2REFERENCES
1 Mukesh Doble, Anil K Kruthiventi, ‘Green chemistry and
processes, Elsevier, Oxford, 2007.
2 Pietro Tundo, Alvise Perosa, Fulvio Zecchini, ‘Methods and
reagents for green chemistry’, Wiley & Sons, New Jersey, 2007.
3 Roger Arthur Sheldon, Isabel Arends, Ulf Hanefeld, ‘Green
chemistry and catalysis’, Wiley-VCH Verlag GmbH, Weinheim,
6 Timothy J Mason, John P Lorimer, ‘Applied sonochemistry:
Uses of power ultrasound in chemistry and processing’,
Trang 3COURSE OUTLINE
• Principles of green chemistry
• Catalysis and green chemistry
• Ionic liquid as green solvent
• Water as green solvent
• Supercritical CO 2 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.
Trang 5What does the Chemical Industry do for us?
Trang 6What does the Chemical Industry do for us?
Trang 7What does the Chemical Industry do for us?
Trang 8What does the Chemical Industry do for us?
Trang 9What does the Chemical Industry do for us?
Trang 10What does the Chemical Industry do for us?
Trang 11Chemistry – a dirty word !
Trang 12Chemistry – a dirty word !
Trang 13Chemistry – a dirty word !
Trang 14Chemistry – a dirty word !
Trang 15Chemistry – a dirty word !
Trang 16Chemistry – a dirty word !
Trang 17Chemistry – a dirty word !
Trang 18Chemistry – a dirty word !
Trang 19Yield is not enough !!!
• Yield = % of maximum possible quantity of
product
• But !!!
• Ignores auxiliaries (reagents, catalysts, solvents,
etc)
• Ignores work-up, purification
• Ignores energy used, hazards involved, toxic
chemicals
Trang 21Key Roles
Design chemical
processes
Optimize process conditions
Yield chemical products
Trang 22THE IDEAL SYNTHESIS
Atom efficient
Simple
100 % Yield
Available materials
Trang 23environmental, health & safety impacts at source
What is green chemistry?
Trang 24• Pollution Prevention Act 1990
• Green chemistry Began in 1991 at
Environmental Protection Agency, Paul
• 1999 Journal “Green Chemistry”
• Chemical & Engineering News
• 2001 Journal of Chemical Education
History
Trang 2512 Principles of green chemistry
(Paul Anastas & John Warner)
chemical syntheses to prevent waste, leaving
no waste to treat or
clean up
Trang 26Pollution Prevention Hierarchy
Trang 272 Design safer chemicals
chemical products to be fully effective, yet have little or no toxicity
3 Design less hazardous chemical syntheses:
Design syntheses to use and generate substances with little or no toxicity to humans
and the environment
Trang 284 Use renewable
materials and feedstocks
that are renewable rather
feedstocks are made
from fossil fuels
(petroleum, natural gas,
or coal) or are mined
Trang 2929
Trang 305.Use catalysts, not
stoichiometric
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
Trang 31or protecting groups or any temporary modifications if possible Derivatives use additional reagents and generate waste
that the final product contains the maximum
proportion of the starting materials There should
be few, if any, wasted atoms
Trang 32or other auxiliary chemicals If these chemicals are
necessary, use innocuous chemicals
Trang 33reactions at ambient temperature and pressure
whenever possible
10 Design chemicals and products to degrade
down to innocuous substances after use so that they do not accumulate in the environment
Trang 35potential for
chemical accidents
including explosions, fires, and releases to the
environment
Trang 36Condensed Principles of green chemistry
(Samantha Tang, Richard Smith and Martyn
Poliakoff )
Trang 37Environmental Impact
COST Risk
Energy