Applying Electrolyte Theory to Real world Problems

Noel C. Scrivner, DuPont Engineering Research and Technology (retired)

Three examples will be used to illustrate the application of fundamentals as a guide to solving problems. In these cases, complexes are important, and the model is no better than the database.

• Treating a fluorosilicic acid waste stream
  goals: pH up, F^- concentration down
  lime versus dolomitic lime
  formation of MgF⁺ complex

• Corrosion of alloys in a hot HNO3 / HF solution
  large database of corrosion rates
  Aluminum inhibits corrosion
  generalization of results
  what else could work

• Solubility of 12 metal hydroxides versus pH
  literature data
  theoretical shape of curves
  quick check, are your calculated results valid?

Noel C. Scrivner, DuPont Engineering Research and Technology

Noel, DuPont Fellow (retired), has worked in DuPont’s engineering function for more than 40 years solving a wide range of equilibrium and kinetic problems across the entire company. He has BA & BS degrees in Chemical Engineering from Rice University and MS & PhD degrees in Chemical Engineering from Carnegie Mellon University. Noel is chair of AIChE’s Design Institute for Physical Properties, Environmental and Safety Properties database (DIPPR ESP). The DIPPR ESP database is a valuable resource for companies dealing with the EU’s REACH regulation. Noel is an Adjunct Professor in Chemical Engineering at Rowan University and will teach Process and Environmental Applications of Aqueous Equilibria this fall.

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