Separations

Avoid Sulfolane Regeneration Problems

July
2004
Reactions and Separations
Donald F. Schneider
The regeneration of sulfolane, a common extraction solvent, is difficult. With proper attention to design and operation, problems can be minimized.

Use Model-Predictive Control to Improve Distillation Operations

January
2008
Instrumentation
Daniel R. Webb, Robert D. Rounding, Robert J. Conroy, Umesh Mathur
This methodology, based on steady-state and dynamic simulation, can be used to develop the necessary models— and avoid disruptive and costly step testing to the extent feasible.

Pervaporation Comes of Age

October
2001
Reactions and Separations
Nick Wynn
This membrane process has found growing use for dehydrating organics. Uses keep increasing, mostly due to development of new, high-temperature membranes.

CEP: AIChE Journal Highlight - A New Spin on Separations

September
2012
Journal Highlight
The microelectronics industry has been revolutionized by technologies that boast ever-increasing capabilities in increasingly smaller areas. Now, the ability to pack high functionality into smaller devices is poised to transform the chemical process...

Size Letdown Lines for Pressure Surges

November
2001
Fluids and Solids Handling
Gianni  Anci
A high-pressure gas flow in a letdown circuit can cause damage to piping and equipment. Here is how to design a system to avoid damage should a pressurized gas flow occur GianniAnci-

Clarifying Centrifuge Operation and Selection

August
2004
Fluids and Solids Handling
Victor Norton ,  William Wilkie
Before selecting a centrifuge for your application, understand its principles of operation and investigate the key process variables.

Be Smart about Column Design

November
2012
Reactions and Separations
Daniel R. Summers, P.E., Mark Pilling, P.E.
Optimizing distillation equipment and processes can improve both the profitability and the greenness of an operation.

Accurately Predict the VLE of Thiol-Hydrocarbon Mixtures

September
2004
Reactions and Separations
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.

Solving Phase Equilibrium Problems

September
2008
Reactions and Separations
James R. Reinhardt, Terrence L. Chambers
Use this optimization-based approach to analyze multi-component, multi-phase Equilibria.

Get More Out of Single-Stage Distillation

February
2002
Reactions and Separations
Ernest A. Perkins , Ryan C. Schad 
Try these practical ways to boost capacity, increase product quality or reduce cycle time in batch and continuous systems.

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