Mobile Navigation

Separation Processes

Organic deposition

(Wilmington, Del.; edlinks.chemengonline.com/6516-544) launched a new temperature-controlled evaporation source for depositing sensitive materials used for producing organic light-emitting diodes (OLEDs) and organic-chemical-based solar cells. The source enables greater control of deposition rate, which reduces material loss and associated costs, says…

Member Exclusive

Optimization of Complex Distillation Columns

    Distillation, based on differences in the volatility of components, is the most common unit operation for separating homogeneous mixtures. In simple distillation columns, a single feed stream is separated into two product streams. Complex columns are those that…

Member Exclusive

Solid-Liquid Separation Showcase

    Solid-liquid separation is a key unit operation that processors look to for a wide-range of applications ranging from: the lowly removal of debris from cooling-fluid lines and products; through the recovery of product from solvents; to massive-scale dewatering…

Member Exclusive

A sludge-treatment process makes its commercial debut

A chemical-treatment process, called Kemicond, that reduces the volume and odor of sludge has been commercialized by its developer Kemitra Kemi AB Kemwater (Helsingborg, Sweden; edlinks.chemengonline.com/6515-532). The first commercial application - a system for Käppala Association (Stockholm, Sweden) that treats…

H2 separation

Eltron Research, Inc. (Boulder, Co.; edlinks.chemengonline.com/6515-553), in partnership with the U.S. Dept. of Energy's (DOE; Washington, D.C.) National Energy Technology Laboratory (Pittsburgh, Pa.; edlinks.chemengonline.com/6515-554), has engineered membrane materials for producing pure hydrogen from coal-derived synthesis gas. In bench-scale tests, the…

A multiport valve enhances countercurrent ion exchange

PuriTech (Dessel, Belgium; edlinks.chemengonline.com/6514-536) has developed a continuous ion-exchange system, called Ionex, which uses up to 75% less water and requires about half the volume of ion-exchange resin, compared with traditional fixed-bed systems, says PuriTech projects director Filip Rochette. Ionex…

Member Exclusive

Chementator: Sonocrystallization makes a salty spray

Sodium chloride aerosols are widely used as part of bronchial provocation tests to identify people with asthma, and those who wish to enter military or police service. To maximize their effectiveness, salt aerosol crystals should be as small as possible…

A new NGL-extraction process makes its commercial debut

Toyo Engineering Corp. (TEC; Tokyo; edlinks.chemengonline.com/5829-536) has developed a new, cryogenic process for extracting natural-gas liquids (NGLs; ethane, propane, butane and other hydrocarbons) from liquefied natural gas (LNG). The Coreflux-LNG process boasts an ethane recovery efficiency of around 98%, compared…

Member Exclusive

Distillation: How to Specify & Install Cartridge Trays

Cartridge trays, defined below, can be the perfect hardware solution for distillation columns that are less than 3 feet (0.9m) in diameter and have a unique need for trays. Packing is usually the preferred choice for small-diameter columns, but there…

Prevent cork taint with high-pressure extraction…

The presence of TCA (2,4,6-trichloroanisole) in cork can lead to undesirable tastes or smells in wine; this so-called cork taint affects about 3–6% of bottled wine. Although techniques (such as boiling in water or striping with superheated steam) have been…