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Separations

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Separations Division (SEP)

The SEP division provides technical programs for meetings with coverage of a variety of currently used and novel methods of separation. Division members can exchange knowledge of technical publications, computer programs, databases, separation research centers, networks and programs.

Cellulose Extraction From Rice Hulls Using Ionic Liquids

Conference Presentation
AIChE Annual Meeting
Tuesday, October 18, 2011 - 8:00pm
Over one fifth of calories consumed by humanity are from rice. Consequently, vast quantities of rice hulls are disposed of as waste, since the hull...

Ionic Liquids for Aromatic Extraction: Are They Ready?

December
2006
Reactions and Separations
Sachin T. Anjan
Ionic liquids have already moved into the commercial arena as reaction solvents. This article compares them to conventional solvents and examines their potential for the extraction of benzene, toluene and xylene from reformate.

Bioseparation Basics

October
2014
Back To Basics
Roger G. Harrison
Bioseparations are critical to the field of biochemical engineering. Each bioseparation process must be tailored to separate, purify, or recover the desired bioproduct. This article gives an introductory overview of filtration and chromatography — two key bioseparation unit operations.

Optimizing Crystallizer Scaleup

June
2003
Fluids and Solids Handling
Wayne Genck
Explore how mixing parameters impact the crystallization process and recommend ways to improve the likelihood of successful scaleup. The concepts of nucleation and growth, types of mixing, design considerations, agitator parameters and scaleup...

Bridge the Gap with Semicontinuous Distillation

August
2001
Reactions and Separations
James R. Phimister ,  Warren D. Seider
This processing strategy combines the advantages of batch and continuous operation, providing flexibility and efficiency in a single design.

Design Principles for Liquid-Liquid Extraction

November
2015
Reactions and Separations
Joerg Koch, Glenn Shiveler
Many factors must be evaluated when developing a liquid-liquid extraction process. Here are some of the important parameters to consider as you go from laboratory testing to commercial-scale operation.

Understand the Basics of Membrane Filtration

April
2013
Back To Basics
Hua Wang, Hongyi Zhou
Membrane filtration is an integral part of many industrial processes, as it is often more environmentally sustainable and cost-effective than other separation technologies

Modeling Reactive Absorption

January
2009
Reactions and Separations
Eugeny Kenig, Panos Seferlis
Effective modeling of reactive absorption enhances system design, improves experiment planning for parameter-estimation, and facilitates process operation and control decisions.

Accurately Predict the VLE of Thiol-Hydrocarbon Mixtures

September
2004
Reactions and Separations
Wayne Sim, Vince Tassone, Chorng H. Twu
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.

Producing Nitrogen via Pressure Swing Adsorption

June
2012
Reactions and Separations
Svetlana Ivanova, Robert Lewis
Pressure swing adsorption (PSA) can be a cost-effective method of onsite nitrogen generation for a wide range of purity and flow requirements.

Real World Modeling of Distillation

July
2003
Reactions and Separations
Harry Kooijman, Rajamani Krishna , Ross Taylor
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...

Using Chromatography to Separate Complex Mixtures

December
2010
Back To Basics
Nathalie Fraud
Purifying high-value mixtures, such as pharmaceuticals, can be an expensive undertaking. Choosing the correct chromatography methods can improve purity and reduce processing time and cost.

Streamlining Crystallization Process Design

January
2004
Fluids and Solids Handling
Christianto  Wibowo, Lionel O'Young, Ka M. Ng
Use phase diagrams to develop reliable crystallization processes quickly and cost effectively.

Developing Crystallization Processes

March
2011
Reactions and Separations
Christianto Wibowo
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.

Understanding Crystallization and Crystallizers

October
2006
Fluids and Solids Handling
Lionel O'Young, Ketan D. Samant
Gain qualitative insight into the basic mechanisms of crystallization, the principles of crystallizer operation, and the ways in which these concepts relate to the selection and application of the various crystallizer configurations in industrial...

Evaluating Distillation Column Performance

June
2013
Reactions and Separations
AIChE’s Equipment Testing Procedures Committee, Tray and Packed Columns Procedure Revision Subcommittee
Follow these guidelines to assess the capacity and efficiency of distillation columns containing trays or packing.

Democratizing Fossil Fuel Conversion

Conference Presentation
AIChE Annual Meeting
Tuesday, November 10, 2015 - 12:30pm-3:00pm
Do you have a billion dollars? Neither do most of the 6 million companies in the Unites States. In fact, less than 10 companies in the U.S. can...

Water Desalination By Shock Electrodialysis

Conference Presentation
AIChE Annual Meeting
Monday, November 9, 2015 - 8:30am-11:00am
The development of cost and energy efficient water purification systems, specifically desalination systems, is one of the most critical engineering...

Recent Trends in the Removal of Sulfate through Precipitation

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, April 29, 2015 - 10:15am-10:45am
Removal of Sulfate through Precipitation Many mines have very high sulfate concentrations in their waste water due to the sulfides in the ore...

Thermogravimetic Analysis and Fast Pyrolysis of Milkweed

Conference Presentation
AIChE Annual Meeting
Wednesday, November 19, 2014 - 10:45am-11:00am
Pyrolysis characteristics and fast pyrolysis of Milkweed was carried out in a thermogravimetric analyzer and a bubbling fluidized bed reactor. Total...

Imparting Ionic Liquid Character to Commodity Chemicals

Conference Presentation
AIChE Annual Meeting
Tuesday, November 18, 2014 - 5:15pm-5:30pm
We have observed that certain bulky salts that are commonly used to synthesize ionic liquids are also highly soluble in a number of polar organic...

CO2 Capture Performance of Imidazole-Based Solvents

Conference Presentation
AIChE Annual Meeting
Monday, November 17, 2014 - 12:45pm-1:15pm
ION Engineering, The University of Alabama and other partners are currently building a slipstream-scale process for post-combustion CO2 capture at an...

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