Separations

Tangential flow filtration (TFF) is commonly used to concentrate and dialyze solutes. It generally involves the circulation of the feed solution over a filter surface. This article presents a brief overview of the principles governing TFF, and...

Conceived more than seven decades ago, dividing-wall columns are now only gaining widespread acceptance. The reasons— the drive to save energy and advances in computer technology that have overcome the burden of doing complex column internal designs.

With solid-liquid equilibrium as its foundation, this systematic approach makes it easy to identify operating regions and theoretical yield to maximize the desired product.

Previously, simulations based on nonequilibrium, or rate-based, models were considered impractical due to their complexity. However, with ever-increasing computing power, these simulations are not only feasible, but in some circumstances they should...

Use this new correlation based on window liquid velocity to predict baffle tray capacity.

Follow these simple precautions to minimize costly breakage.

Use phase diagrams to develop reliable crystallization processes quickly and cost effectively.

Nonlinearities in the response of a column to changes in operating conditions and in common economic valuation functions can have significant impacts on the economic optimum energy consumption for the column. Here’s a way to account for such...

Follow these guidelines for specifying, selecting and designing overhead vacuum condensers.

Generalized pressure-drop correlation (GPDC) charts have been the standard for predicting packing flood points and pressure drops. This article guides engineers on the correct and incorrect uses of the GPDC interpolation procedure, and updates the...