Screw Feeders: A Guide to Selection and Use
Hermann J. Feise, Steven W. Couch, Thomas L. Krieger, Timothy Bell
Gain insight as to what screw feeder is best for your application. Plus, learn how to size, specify and test screw feeders.
Chemical Engineering Practice
Selecting In-Process Particle-Size Analyzers
Paul Barrett
To select the proper instrument for process monitoring, one must determine what attribute of the particle system impacts the process or product parameter of concern. Once the size region is identified, it can be tracked in-process, opening up the...
Properly Employ Overhead Condensers for Vacuum Columns
David Greene, George G. Vago
Follow these guidelines for specifying, selecting and designing overhead vacuum condensers.
Accurately Predict the VLE of Thiol-Hydrocarbon Mixtures
Chorng H. Twu, Vince Tassone, Wayne Sim
This methodology can be used to calculate vapor-liquid equilibria (VLE) between thiols and hydrocarbons at any composition, temperature or pressure to improve gasoline fractionation processes.
Guidelines for Selecting Sterilizing-Grade Filters
Monica Cardona, Philip Blosse
Determine if your bioprocess needs a sterilizing grade filter, and if so, use these guidelines to select the proper one for your application.
A Hybrid Route to Chirally Pure Products
Christianto Wibowo , Lionel O'Young
Chromatographic resolution coupled with crystallization can be your best option for manufacturing chirally pure products.
Succeed at Catalyst Scale-Up
Ben Wagner, Donald R. Engelbert, J. Todd Osbourne, Jeff Braden, Richard Allen, Uday T. Turaga, William H. Beever
Follow these principles to reduce the time required for scale-up and commercialization to improve the resource effectiveness of the effort.
The G-Value for Agitator Design: Time to Retire It?
Gregory T. Benz
This commonly used number does not correctly address the influence of viscosity, and has no relationship to performance parameters such as fluid velocity and blend time. This article recommends actual measures of agitator performance that should be...
High-Shear Mixers: Still Widely Misunderstood
Suzanne Shelley
Advanced modeling techniques and improved geometric features are helping designers and users of rotor-stator mixers to demystify these complex devices, and get more consistent predictable results.
Green Reactors
Mukesh Doble
Compare these microreactor technologies, along with the intrinsic advantages and disadvantages of miniaturization, to achieve process intensification.
Valves 101: Types, Materials, Selection
Brian Gordon
The most common valves used in chemical processing are ball valves, butterfly valves, diaphragm valves, and check valves.
Choose the Right Gas Sensor
Sandra Barnes
Selecting a sensor for continuous monitoring involves many considerations. This article discusses the types of sensors available, their applicability and limitations, and how to choose an appropriate sensor to protect people and equipment.
Agitating Fibrous Materials
Gregory T. Benz
Slurry agitation involves complicated processes. This article presents guidelines for understanding the rheology of cellulosic and other fibrous materials, and outlines a method for scaling up their agitation.
Minimize Mechanical Integrity Budget Battles
Daniel A. Long, P.E., Jack McCavit
Chemical processing and manufacturing plants must ensure the mechanical integrity of their equipment. These strategies and tactics can make doing so easier when budget issues arise.
Determine the Right Eye Protection
Harry J. Elston
Wearing the appropriate protective eyewear begins with a thorough safety assessment. These guidelines clarify how to identify hazards and select protective equipment to avoid eye injuries.
The Chemical Industry Phoenix
Terry McMahon
Seven years ago, I wrote a column for another publica tion entitled “The U.S. Chemical Industry: R.I.P.” This pillar of American economic strength, which a few years earlier was the leading exporter among U.S. manufacturing sectors (with net exports of $15–20 billion annually), was shriveling due in large part to policy blunders and regulatory mistakes.
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