Separation Processes
Cartridge Filtration Principles For the CPI
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…
Green chemistry
Last month, after just two years, Maaike Kroon completed her Ph.D. from the Technical University of Delft (Netherlands; edlinks.chemengonline.com/6891-544) for developing a sustainable and inexpensive production process that enables reaction and separation operations to be performed in the same vessel.…
Crystallizers And Agitators
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…
Factors Affecting Screening Performance
Consider these points when selecting and specifying equipment that separates material according to particle size Screening is an integral part of many dry material processes, ensuring an end product that is free of fine or oversized material, or in some…
Selective extraction
MPI Technologies AB (Lund, Sweden; edlinks.chemengonline.com/6518-545) is expanding its production capabilities for making molecularly imprinted polymers (MIPs) so that batch quantities of 3–5 kg/wk will be possible. MIPs are stable polymers in which artificial receptor sites have been created to…
Hot CO2 separation
Researchers from the Center for Synthesis and Chemical Biology (CSCB; Dublin; edlinks.chemengonline.com/6518-551) have developed an ultrathin, nanoporous membrane that can separate carbon dioxide from nitrogen at 600°C; up to now, no membranes have been available to separate CO2 at temperatures…
Biopharm purification
GE Healthcare (Chalfont St. Giles, U.K.; edlinks.chemengonline.com/6518-554) and BAC B.V. (Naarden, Netherlands; edlinks.chemengonline.com/6518-555) are collaborating to develop new affinity-ligand and chromatography media for human antibodies and adeno-associated virus (AAV) viral vector purification. The first products are expected to be commercially…
Dryers
Process small batches with this fluid-bed dryer The Circular Vibratory Fluid Bed Processing System (photo) dries small batches of bulk-solid materials at high temperatures. The self-contained system integrates an 18-in.-dia. fluid-bed processor with heater, blower, cyclone separator and…
Reducing the cost for pro-ducing high-purity hydrogen
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…
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…