Separation Processes
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VACUUBRAND has specialized in vacuum pumps, gauges, and controllers for process, industrial, research, and OEM applications for over 50 years. We have earned a loyal, global following for our dry, chemical-resistant pumps, long service intervals, and advanced controls. Our oil-…
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VACUUBRAND's chemical-resistant diaphragm pumps have been designed and manufactured to exacting standards not only in order to achieve the performance our customers count on, but also to run quietly.
An Up-Close Look at Electropositive Filtration
Electropositive filters take advantage of surface-charge effects to filter nanometer-sized particles. Provided here is an overview of how they work and where they can be used Electropositive filters take advantage of surface-charge effects to filter nanometer-sized particles. Provided here is…
Imitating cactus plants to improve membrane performance
Regulation of water content in polymeric membranes is important in several applications, including proton-exchange fuel cell membranes. Normally, this is achieved either by external regulation or by operating the cells at higher temperatures. Now a team from CSIRO (Melbourne, Australia;…
Recovering rhenium photochemically
Professor Hisao Hori and his research group at Kanagawa University (Hiratsuka City, Japan; www.kanagawa-u.ac.jp) have reported what is said to be the first photo-induced recovery of rhenium from aqueous solutions — an achievement with implications for an inexpensive way to…
Metal-organic-framework adsorbent promise to cut costs for capturing and storing flare gas
A process for the separation and recovery of stranded and associated natural gas is being developed by Framergy, Inc. (Wilmington, Del.; www.framergy.com), with support from the National Science Foundation’s Small Business Innovation Research (SBIR) Phase I program. The company is…
PSA Technology: Beyond Hydrogen Purification
Pressure swing adsorption technology is well known for H2 purification applications, but the technique can also be used for other gas-separation processes in petroleum refining facilities Pressure swing adsorption (PSA) is a well-established process for the separation and purification of…
Continuously cleaned filters for challenging water streams
A new self-cleaning filter from Spiral Water Technologies Inc. (San Rafael, Calif.; www.spiralwater.com) can efficiently treat water with 25,000 mg/L total suspended solids (TSS). According to Spiral Water CEO Ashwin Gulati, the filters use much less energy — reportedly just…
High-efficiency cell removal
Acoustic wave separation (AWS) technology can improve cell-culture clarification in biopharmaceutical applications by enabling high-efficiency, continuous removal of cells in a closed system without centrifugation. Developed by FloDesign Sonics (Wilbraham, Mass.; www.flodesign.org) and licensed to Pall Corp. (Port Washington, N.Y.;…
An Overview of Filtration
Understanding how different filtration methods work leads to a more informed decision when selecting a filtration system Filtration is arguably the most commonly used unit operation in the chemical process industries (CPI). The range of applications for this important unit…