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E-Factor

E-Factor. Environmental Impact Factor. History. In the late 1980s Roger Sheldon introduced E-factor to evaluate the environmental impact of manufacturing processes. . A basic process…. Product. MATERIALS. PROCESS. WASTE. Calculations….

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E-Factor

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  1. E-Factor Environmental Impact Factor

  2. History In the late 1980s Roger Sheldon introduced E-factor to evaluate the environmental impact of manufacturing processes.

  3. A basic process… Product MATERIALS PROCESS WASTE

  4. Calculations… • E-factor measures the amount of waste produced in a certain process. • E-factor is calculated by dividing the mass of waste (kg) by the mass of product (kg) Waste (kg) Efactor = ------------------ Product (kg) THE GOAL IS ZERO !

  5. Your basic process… Product MATERIALS M&Ms PROCESS = separation of final product WASTE

  6. How can you reduce your e-factor? Product MATERIALS M&Ms PROCESS = separation of final product WASTE

  7. Your mission: • Refer back to the 12 Principles • Write down strategies you can use to reduce the amount of waste • Come up with as many strategies as possible! THE GOAL IS ZERO WASTE !

  8. Strategies: Reducing or eliminating derivatives or Solvents & Auxiliaries = Using a catalyst instead of stoichiometricreagents = Use real time analysis= Use renewable feedstocks=

  9. How Ibuprofen is synthesized  Pfizer Inc. 2008

  10.  Pfizer Inc. 2008

  11. Improved Synthesis of Ibuprofen 77% reduction in waste Graphic from Green Chemistry Department, University of Scranton  Pfizer Inc. 2008

  12.  Pfizer Inc. 2008

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