1. Green Chemistry
Dr Seemal Jelani
11/24/2018
Chem-442

2. Green Chemistry Is About...
Waste
Materials
Hazard
Reducing
Risk
Energy
Cost

3. Definition
Green chemistry is a pro-active approach to pollution prevention.
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4. How it works?
It targets pollution at the design stage, before it even begins.
If chemists are taught to develop products and materials in a manner that does not use hazardous substances, then much waste, hazards and cost can be avoided.
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5. Green Chemistry is designing chemical products and processes that reduce or eliminate the use and/or the generation of hazardous substances.
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6. Sustainability Is the goal is the means
Meeting the needs of the present generation without compromising the needs of future generations
Green chemistry: technologies of the invention, design and application of chemical products and processes to reduce or to eliminate the use and generation of hazardous substances ,and where possible utilize renewable raw materials
Primary pollution prevention not remediation
Use of chemistry for improved environmental performance
Is the goal
is the means
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7. Environmental Movement
Public Awareness
Pollution Prevention Act
Publications of effects and consequences
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8. Environmental Movement
“Dilution is solution”
Pollution Prevention Act
option of first choice
national policy of US
“Alternative Synthetic Pathways for Pollution Prevention”
design synthesis of chemicals for PP
collaborations, voluntary partnerships
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9. Green Chemistry
Carrying out chemical activities, including chemical design, manufacture, use, and disposal, such that hazardous substances will not be used and generated
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10. Green Chemistry
Green chemistry is the use of chemistry for pollution prevention
Design of chemical products and processes that are more environmentally benign
Reduction or elimination of the use or generation of hazardous substances associated with a particular synthesis or process
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11. What is the difference between Environmental Science and Green Chemistry?
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12. Both areas of study seek to make the world a better place
Both areas of study seek to make the world a better place. The two are complimentary to each other.
Environmental Science identifies sources, elucidates mechanisms and quantifies problems in the earth’s environment.
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13. Green Chemistry is not Environmental Chemistry.
Green Chemistry seeks to solve these problems by creating alternative, safe technologies.
Green Chemistry is not Environmental Chemistry.
Green Chemistry targets pollution prevention at the source, during the design stage of a chemical product or process, and thus prevents pollution before it begins.
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14. Areas of Research Feedstocks / Starting Materials
Reagents or Transformations
Reaction Conditions
Final Product
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15. Feedstocks / Starting Materials
Select and utilize more benign starting materials
reduction in amount used
reduction of essential toxicity through structural modification / replacement
Risks can be reduced through protective gear and control techniques, but GC may be more cost effective and safer
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16. Examples
Alternative Synthetic Pathways Award Flexsys America L.P. New Process for 4-Aminodiphenylamine
Academic Award Terrence J. Collins Carnegie Mellon University TAML™ Oxidant Activators: General Activation of Hydrogen Peroxide for Green Oxidation Technologies
Eliminate use of acids to break initial bonds
Phosgene replacement
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17. Alternative Reagents Assessment of the hazard of reagent
Evaluation of synthetic transformation associated with use of specific reagents
determine product sensitivity
reaction efficiency
Improve reaction efficiency
Reduce needed quantity
eg. Choose catalytic reagent to stoichiometric reagent
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18. Examples Use of visible light as reagent
Alternative Synthetic Pathways Award Lilly Research Laboratories Practical Application of a Biocatalyst in Pharmaceutical Manufacturing
Dr. Karen M. Draths Professor John W. Frost Michigan State University Use of Microbes as Environmentally-Benign Synthetic Catalysts
Academic Award Terrence J. Collins Carnegie Mellon University TAML™ Oxidant Activators: General Activation of Hydrogen Peroxide for Green Oxidation Technologies
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19. Alternative Reaction Conditions
Reduce or eliminate solvents used in reaction media, separations, formulations
use of supercritical fluids as solvents
able to tune supercritical fluids by choosing critical region to conduct chemistry
Use aqueous solvent systems in place of organic solvents in chemical manufacturing
Use Supercritical CO2 as a solvent
Reduce operating temperatures
Must evaluate impact on case by case basis
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20. Alternative Reaction Conditions
Alternative Solvents and Reaction Conditions Award Nalco Chemical Company The Development and Commercialization of ULTIMER®®: The First of a New Family of Water Soluble Polymer Dispersions
Alternative Solvents/Reaction Conditions Award Argonne National Laboratory Novel Membrane-Based Process for Producing Lactate Esters. Nontoxic Replacements for Halogenated and Toxic Solvents
Alternative Solvents/Reaction Conditions Award Imation Dry View™ Imaging Systems
Alternative Solvents/Reaction Conditions Award The Dow Chemical Company The Development and Commercial Implementation of 100 Percent Carbon Dioxide as an Environmentally Friendly Blowing Agent for the Polystyrene Foam Packaging Market
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21. Alternative Products
Identify part of molecule that is providing intended use and part of molecule responsible for toxicity or other hazards
Reduce toxicity w/o sacrificing efficacy of function
eliminate toxic functional groups
make molecule less bioavailable
Pharmaceutical and pesticide manufacturing
Change or replace products
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22. Alternative Products
Designing Safer Chemicals Award Rohm and Haas Company Designing an Environmentally Safe Marine Antifoulant
Small Business Award Legacy Systems Incorporated Coldstrip™, A Revolutionary Organic Removal and Wet Cleaning  Technology
Designing Safer Chemicals Award Albright and Wilson Americas THPS Biocides: A New Class of Antimicrobial Chemistry
Designing Safer Chemicals Award Rohm and Haas Company The Invention and Commercialization of a New Chemical Family of Insecticides Exemplified by CONFIRM™ Insecticide
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23. Program EPA Green Chemistry Program
fosters research, development, implementation of innovative chemical technologies for pollution prevention in BOTH a scientifically sound and cost effective manner
Supports fundamental chemical research, educational activities, international meetings and conferences, toll development, in partnership with academia, industry and other agencies
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24. Partnerships Scientific organizations Industry Trade associations
Academia
Government
National Labs
Research centers
Environmental groups
International organizations
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25. GC-ES
Identifies opportunities to reduce or eliminate hazardous substances
Suggests molecular modifications to minimize toxicity
Technical information on green synthesis
Database of useful green chemistry references
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26. Conclusion Goal of benign chemistry synthesizing classes of chemicals
developing reaction types (stereo-specific)
Dramatic increase in funding, with support expected to continue
Green chemistry research conducted in labs in academia, industry, and government around the world
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27. Outcome
Illustrate the whole information presented in this powerpoint in the form of pictorial representation.
Date of representation:
19th Sep, 2016
There will be no more retake of this activity
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