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Archives :: Processing & Handling :: Separation (Liquid-Liquid & Gas-Liquid)

Displaying 241 - 260 of 277 stories.
March 1, 2007
For developing a new technology that traps carbon dioxide and other pollutants so they can be removed, researchers from the University of Bath's Dept. of Chemical Engineering ( have received the...
February 1, 2007
Toyo Engineering Corp. (Tokyo, Japan; and BASF AG (Ludwigshafen, Germany; are...
February 1, 2007
Winemaking still involves traditional batchwise processing steps, such as batch fining with bentonite clay to prevent heat instability in protein haze formation. This is typically done by adding “rule-of-thumb” amounts of clay, allowing it to settle and decanting the wine. Now, researchers from the Deparment of Chemical Engineering, Adelaide...
February 1, 2007
    The equilibrium phase distribution ratio (K value) is necessary for designing and assessing the performance of distillation columns. This paper proposes a simplified approach to calculate the K value that is suitable for preliminary design work and for checking the performance of existing columns. The article also explains the first principles for calculation of K values from the fugacity of...
January 1, 2007
A process that can enrich highly contaminated natural gas has been developed at Eindhoven University of Technology (Netherlands;, with support from the Royal Shell/Dutch Group. The device shows promise as a way to utilize the large quantities of natural gas that is currently unusable because of high concentrations of carbon dioxide and hydrogen sulfide. Existing technology, such...
January 1, 2007
    Improvements in cartridge dirt-holding capacity has led to new designs, as well as to new equations for filter selection and specification, which are linked to dramatic improvements in the time between turnarounds and filter changeout. Cartridge filtration serves the process industries in a host of applications. Ironically, however, filtration principles are not taught adequately in many...
January 1, 2007
Last month, after just two years, Maaike Kroon completed her Ph.D. from the Technical University of Delft (Netherlands; for developing a sustainable and inexpensive production process that enables reaction and separation operations to be performed in the same vessel. The process takes advantage of the unique properties of ionic liquids (ILs) and supercritical carbon dioxide by...
December 1, 2006
    New crystallization-system designs rely on previous successful installations and rules for scaling-up systems to adapt to slightly different conditions. However, guidelines or rules of thumb have underlying assumptions that might have been ignored when scaling-up a system during the design phase. This practice often leads to difficulties in practical application. This point will be clearly...
December 1, 2006
The mountains of used tires piling up around the world may be a source of a new filtration media that promises to be a cheaper and more efficient alternative to sand or anthracite, which are commonly used for filtering wastewater. The patented technology, developed by Yuefeng Xie, associate professor of environmental engineering at Penn State Harrisburg (Pa.;, uses crumb rubber...
November 1, 2006
GE Healthcare (Chalfont St. Giles, U.K.; and BAC B.V. (Naarden, Netherlands; are collaborating to develop new affinity-ligand...
November 1, 2006
MPI Technologies AB (Lund, Sweden; is expanding its production capabilities for making molecularly imprinted polymers (MIPs) so that batch quantities of 3–5...
November 1, 2006
Researchers from the Center for Synthesis and Chemical Biology (CSCB; Dublin; have developed an ultrathin, nanoporous membrane that can separate carbon dioxide from nitrogen at 600°C; up to now, no...
October 1, 2006
    Provided that they are updated when appropriate to keep them relevant, time-tested heuristics rules based upon experience, also referred to as rules of thumb, can be useful for the design, specifying and operation of several kinds of equipment used in process plants. The first and foremost heuristic rule is that the engineer should not shy away from using heuristics - and the second rule is...
October 1, 2006
Most of today's solar cells are made from silicon wafers cut from blocks of crystals. The wafers are typically 0.2-0.25-mm thick, yet most of the photon-to-electricity conversion takes place in the outermost 0.02 mm of the wafer. In an effort to reduce the amount of Si required (and thus the cost) for solar cells, BP Solar (Frederick, Md; is supporting a three-year research...
October 1, 2006
Last month, BOC Edwards (Wilmington, Mass.; completed installations of its new ERIX wastewaster treatment system at the College of Nanoscale Science and Engineering, of the University of...
October 1, 2006
It is well known that palladium membranes are ideal for purifying hydrogen because they allow only H2 to pass through (via diffusion of H atoms) while blocking all other molecules. Because contaminants cannot pass through this pore-free "filter", Pd membrane separation is especially suitable for ultrahigh-purity applications, such as those in the electronics industry, says Charles Krueger, vice...
September 1, 2006
    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 involve either two feed streams or three product streams - a side-stream in addition to the top and bottom products. These complex...
September 1, 2006
(Wilmington, Del.; launched a new temperature-controlled evaporation source for depositing sensitive materials used for producing organic light-emitting diodes (OLEDs) and organic-chemical-based...
September 1, 2006
Researchers at the Fraunhofer Institute for Environmental, Safety and Energy Technology (Umsicht; Oberhausen, Germany; are developing a new type of filter medium that can be manufactured with pores of precisely the same size (photo). The...
September 1, 2006
Manufacturing soda ash by either the Solvay or Hou process produces a large amount of waste sludge. About 10 m3 of waste — mostly liquid with 2–8 wt.% solids — is generated per ton of soda ash produced, says Trevor Sparks, marketing director, chemical process industries at Larox Corp. (Lappeenranta, Finland; The waste is composed of solid calcium carbonate and...
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