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HIGH PRODUCTION VOLUME CHEMICALS – UNDERSTANDING THE POLLUTION PREVENTION IMPLICATIONS

Gain insight into the implications of pollution prevention in the realm of high production volume chemicals, exploring concepts such as clean production, waste reduction, and cleaner technology. Discover case studies, chemical efficiency improvements, and future strategies for sustainable chemical usage.

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HIGH PRODUCTION VOLUME CHEMICALS – UNDERSTANDING THE POLLUTION PREVENTION IMPLICATIONS

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  1. HIGH PRODUCTION VOLUME CHEMICALS – UNDERSTANDING THE POLLUTION PREVENTION IMPLICATIONS Professor Michael Overcash Department of Chemical and Biomolecular Engineering North Carolina State University

  2. Perspective on the Universe of Chemicals in Commerce • General definition - >1mt/yr in production • Origin is the New Source Registration Program at USEPA, FDA, and US Dept. of Agriculture

  3. ~ 100,000 chemicals • Of which ~ 30,000 are polymers ~ 10,000 are drug-related (FDA) ~ 10,000 are agricultural chemicals (USDA) • Grows at about 1%/year

  4. Commodity Chemicals • Designation in the Chemical Industry for the high product volume in commerce • Usually these are 50 in number • 60% are organics ( in the range or 1.5 – 15 million metric tons per year) • 40% are inorganics (in the range of 1-45 million metric tons per year)

  5. Chemicals in commerce tend to be linked in supply chains • These links are to achieve molecular building • A complex chemical might be a drug with about 200 chemical plants linked • There are also biosynthetic supply chains • There are also simpler extraction routes

  6. High Production Volume Chemicals • About 2800 chemicals • Appear to be almost all organics • Not yet developed correlations with other lists used in industry or in research

  7. Perspective on Pollution Prevention

  8. SIMILAR CONCEPTS • POLLUTION PREVENTION (P2) • CLEAN PRODUCTION • WASTE REDUCTION • CLEANER TECHNOLOGY • WASTE MINIMIZATION • ENVIRONMENTALLY-CONSCIOUS MANUFACTURING • ENVIRONMENTALLY BENIGN DESIGN AND MANUFACTURING • GREEN CHEMISTRY

  9. All Process Changes That Reduce Energy Use or Material Losses Pollution Prevention Projects* * Cost-Effective Changes Context of Pollution Prevention Within All Possible Process Changes

  10. Sources of P2 Case Studies • Pollution Prevention Library of Case Studies (North Carolina Office of Waste Reduction) – About 35,000 On-line Papers or Reports (2006) • http://www.P2PAYS.org

  11. Third Perspective on This Field • REACH (Registration, Evaluation, and Authorization of Chemicals) • Similar Programs in US and Japan • Provide information on chemicals • toxicity, environmental impact, ecological (short term) • Life cycle information (long term) • Stimulate changes to reduce adverse impacts • Pollution prevention will often be used

  12. Ethyl Acetate Dichlorobenzene Carbon Disulfide HCl Sodium bicarbonate Benzene Hexane Aluminum Chloride T Toluene Methylene Chloride SMB EtOH S NaOH Water THF Sodium Borohydride Toluene Thionyl Chloride Succinic Anhydride

  13. IV C O H 2 Cl Cl “Carbon frame” efficiency IX XI X 3 + Benzene T-S yield=33% SOCl2/ AlCl3 VI VII VIII V Tetralone yield=37% Separation Racemic mixture: cis(+,-) & trans(+,-) Total yield=12.2%

  14. 10% IMPROVEMENT IN CARBON UTILIZATION EFFICIENCY • WITHIN THE COMPANY (kg/kg Sertraline): 97 96 1 (most waste is solvent) • THROUGHOUT THE PHARMACEUTICAL COMPLEX (kg/kg Sertraline) 39,098 35,794 3,304 Over 3,000-fold greater impact

  15. Solvent usage efficiency THF THF TiCl4 CH3NH2 0°C THF Naphtale- nona Naphtalen- amine mixing 46 Cool 1-5°C 47 Addition 48 Reaction, Stirring and Cooling <10°C 49 Stirring 17hr, N2 50 Filtration w/washing 51 Vacuum 52 THF TiO2 “cake” + Reactants + Solvent + Chemical losses + Solvent

  16. 10% IMPROVEMENT INSOLVENT USAGE WITHIN THE COMPANY (kg/kg Sertraline) 97 89 8 WITHIN THE PHARMACEUTICAL COMPLEX (kg/kg Sertraline) 39,098 38,493 605 LARGER EFFECT WITHIN COMPANY, BUT GREATEST IMPACT IS OUTSIDE COMPANY

  17. Ethyl Acetate Dichlorobenzene Carbon Disulfide HCl Sodium bicarbonate Benzene Hexane Aluminum Chloride T Toluene Methylene Chloride SMB EtOH S NaOH Water THF Sodium Borohydride Toluene Thionyl Chloride Succinic Anhydride

  18. P2 Solutions • Recycle – increases yield and reduces the entire supply chain • Prevention – substitution leads to introduction of a new segment of the supply chain - increased yield and reduces the entire supply chain • Reuse – eliminates the production of the reused material thus improving the impact of the product incorporating the reused material • Use of Products – chemicals affect efficiency of the next stage in the supply chain

  19. All of these pollution prevention solutions can have beneficial or adverse effects as we seek to improve the situation for HPV chemicals

  20. Future Work • Perform an example of life information for 1-4 HPV chemicals to help those working on improvement to see some of the hidden benefits of change. • Examine the human health assessment (DALY’s) from the supply chain versus the use of an HPV chemical to see the relative importance of information.

  21. Conclusions • HPV and other chemicals are a part of the large scale societal use of “chemicals in commerce” • Environmental improvements for HPV from pollution prevention must also be reviewed in terms of the life cycle effects on human health and the environment • A challenge is to make the HPV lists more useable and searchable in the techniques used for P2

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