Post Mixing Optimization and Solutions


You know mixing is important and no one has ever had any formal training

Most engineers and managers never have. We can give you formal training or a refresher course.  What better way than to have an unbiased consultant come over? We have presentations on mixing basics and specific topics. 

Dr. Post used to give a comprehensive course on mixing (CH701) at the University of Toronto in conjunction with the Professional Development Centre. That was retired in 2003 due to a shift in focus at the Centre. An outline of the course can still be found here, so if this looks like something you would be interested in Contact Us.

As of 2007, Dr. Post is giving a graduate mixing class at Stevens Institute of Technology (Hoboken, NJ). Based on attendance, it is held during the Fall/Winter Semester and then again during the Winter/Spring Semester. The Internet-based course is called Pharmaceutical Mixing CHE 621 PME 621. Mixing is mixing, so anyone interested in mixing can benefit from this course. Of course emphasis is placed on applications and processes in the Pharmaceutical industry, and topics pertaining only to the mining industry are not discussed. But the theory is still the same and can be applied to all industries. This is a 3-credit graduate course. Anyone who has access to the internet is welcome to register. If you are interested, have a look at my syllabus. The next class starts Monday Sept 13, 2010, and everyone is welcome, not just students of Stevens.

Dr. Post will also be giving a one day mixing seminar at the AICHE National Annual Meeting on Sunday, November 7, 2010 in Salt Lake City called Mixing Basics: And Some Advanced Topics. Professional Development Hours: 7.5. Participating in this AIChE short course may qualify as Certified Professional Credits (CPC) in certain jurisdictions. Attendees will receive a signed Professional Development Hours certificate at the end of the course.

Key Benefits

  • A better awareness of how important mixing really is to process yield and product purity
  • Understanding how different impeller designs affect mixing
  • Getting scale-up right with less trial-and-error techniques
  • Understanding your arsenal of mixers and reactors
  • Satisfying your curiosity of why one mixer doesn't fit all
  • Being better prepared for the next new product launch and making the right decisions
  • In-house mixing seminars tailor made for your industry and products
  • Seminars can be given in English, German, and now Spanish!

Partial list of mixing topics for education, mixing seminars, or presentations.

  • Mixing basics
    • Flow patterns, impeller spectrum, baffle effects
    • Tank arrangements, mixing methods
    • Disection of a mixer, nomenclature
    • Batch or continuous processing
    • Inline dynamic and static mixing, pipe mixing, jet mixing, mixing intensification, etc.
  • Quantitative mixing
    • Measuring power, measuring flow
    • Putting numbers to mixing, dimensionless numbers, 
    • Velocities, Shear rates
    • CFD
  • Mixing applications
    • Did you know how many processes require mixing?
  • Micro-macro mixing, what you see and what you can't, and why it matters.
  • Mass Transfer - Kinetic limitations, how to know when its truely kinetic controlled for kinetic studies
  • Importance of understanding non-Newtonian fluids: non-Newtonian flow behavior (behaviour in British English)
  • Low viscosity blending: mixing times, power numbers
  • High viscosity blending: mixing times in the transitional and laminar regime, caverns, dead-zones, special impeller designs
  • Solids suspension: floating solids, off-bottom, uniformity
  • Solid-Liquid mass transfer: dissolving, catalysis, crystallization, fertilizers
  • Gas dispersion: flooded and well dispersed, sparge rings, sparge pipes, impeller design effects, BIOX
  • Gas-Liquid mass transfer: how to measure, DO, dissolved oxygen, gas-liquid mass transfer coefficient
  • Gas-Liquid applications: Hydrogenations, fermentations, reactions with sulfur dioxide SO2, carbon dioxide CO2
  • Up-pumping, mixing upside down, better mass transfer, no foaming
  • Liquid-Liquid dispersions and emulsions, margerine, cosmetics, high speed mixers, emulsifiers, rotor-stators
  • Solvent extraction for copper, nickel, uranium, moly, and other rare earths
  • Polymerizations
  • High pressure autoclaving for gold industry
  • Flue Gas Desulfurization, FGD or Rauchgasentschwefelung (German)
  • Scale-up and scale-down: If you have a scale-up problem - you have a mixing problem
  • Heat transfer - Overall and local, transfer coils, vertical, helical, plate coils, jackets
  • Draft tube aerators, wastewater, clean water, draft tube ditches
  • Pulp and Paper, stock consistency, mixing, non-Newtonian, CFD analysis
  • Water purification and Wastewater, continuous processes

If this describes your project and you would like us to contact you, please use the Contact Us form.


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