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June 29, 2015
With its latest polyacrylonitrile (PAN) membrane, Sterlitech Corporation offers a hydrophilic filter that does not sacrifice selectivity to achieve faster flow rates in comparison to nylon or polyethersulfone (PES). Its unique nanofiber mesh construction combines extremely fine pores with significant open space to allow easy liquid flow while trapping particulates as small as 0.2 micron in width. “This technology is already in use for water filtration in applications where low energy is required,” said Sterlitech President Mark Spatz. “We are excited to introduce this technology at Sterlitech because we know it has a place in laboratories or small-batch processes where its uniquely high flux is an asset.” This novel membrane’s performance is attributed to its unique construction.
It is created by extruding extremely fine PAN nanofibers onto a polyethylene support substrate, to form a tight mesh that filters out particles, colloids, and bacteria larger than 0.2 micron. The mesh
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June 29, 2015
Complementing our existing CF042 and Sepa CF membrane/process development cells is the new CF016. Designed for applications with smaller membrane samples or low solution volumes, the CF016 comes in two varieties: a crossflow version that can perform reverse osmosis, nanofiltration, ultrafiltration, and microfiltration separations and a forward osmosis version that can be further modified to perform pressure-retarded osmosis.
In the crossflow version of the the CF016, feed solution enters the membrane cavity in the cell body, flowing tangentially across the membrane surface. Applied pressure forces a portion of the stream to permeate the membrane and flow through the permeate carrier located on the underside of the top half of the cell, finally exiting through the outlet on the top of the cell into a user designated collection vessel. The concentrate stream, which contains the material rejected by the membrane, continues sweeping over the membrane, exiting via the concentrate outlet
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June 26, 2015We had a great time with you at the ASM and NAMS Conferences earlier this month. You'll have another chance to see us at Booth #83 the NAOSMM tradeshow in Long Beach. We'll be there from July 26-31 so don’t miss out on the opportunity to discuss your filtration needs and get your questions answered from the experts!
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June 18, 2015
The BW30FR line of reverse osmosis membranes from Dow is being discontinued. At this time, these membranes do not have any direct replacements, although we still carry other Dow membranes which may be suitable for your application. To aid comparison and help you select a possible replacement, the table below includes the technical specifications of the Dow membranes we offer:
DOW FILMTEC™ Reverse Osmosis Membranes
Series SW30HR SW30XLE BW30 BW30LE BW30FR (discontinued) XLE Feed Seawater Seawater Brackish Water Brackish Water Brackish Water Brackish Water Type High Rejection Extra-Low Energy Standard Low Energy Fouling Resistant Extra-Low Energy pH Range (25°C) 2-11 2-11 2-11 2-11 2-11 2-11 Flux (gfd)/psi 17-24/800 23-29/800 26/255 37-46/225 26/255 33-41/125 NaCl Rejection 99.6% 99.5% 99.5% 99.0% 99.5% 98.7% MWCO (Daltons) ~100 ~100 ~100 ~100 ~100 ~100 Polymer Polyamide Polyamide Polyamide Polyamide Polyamide Polyamide If you need assistance finding a suitable replacement product,
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June 05, 2015
Toray is discontinuing the production of the 70HA and 72U reverse osmosis (RO) membranes. These membranes are being replaced in Sterlitech's line-up by the new 73HA and 73U RO membranes, respectively. The table below lists the specifications of all of our current offerings from Toray for easy comparison. To browse our complete selection of RO membranes or to place an order with us, click here. Toray Reverse Osmosis Membranes
Series 73HA 73AC 73U 82V Feed Brackish Water Brackish Water Brackish Water Seawater Type Extra-Low Energy High Rejection, Low Energy, Cl Resistant Extra-Low Pressure High Rejection, Low Energy pH Range (25°C) 2-11 2-11 2-11 2-11 Flux (gfd)/psi 23.3/73 30.7/225 29.5/109 27/798 NaCl Rejection 99.0% 99.8% 99.4% 99.7% MWCO (Daltons) 0 0 0 0 Polymer Polyamide Polyamide Polyamide Polyamide -
May 27, 2015
Sterlitech will exhibiting for the first time at the North American Membrane Society's Annual Meeting in Boston. The conference runs from May 30th to June 3rd at the Park Plaza Hotel. Our President, Mark Spatz, and our Product Manager in charge of Membrane/Process Development equipment, Sepideh Jankhah, will be on hand to discuss the latest advances with our technology. We hope to see you there!
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May 27, 2015
In just a few days, Sterlitech will be heading back to New Orleans to exhibit the American Society for Microbiology's General Meeting. Join Product Manager Jason Struthers and Sales Engineer Tauni Wright at Booth #945 to check the latest in Sterlitech's microfilters and laboratory equipment.
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May 15, 2015Sterlitech's cross flow testing cells, the CF042 and the Sepa CF cell, will soon be coming with their own guides to cross flow filtration. Below is an excerpt from the guide, showcasing studies that illustrate the versatility of Sterlitech's cross flow filtration equipment and are helpful in developing your own experiments: The following studies utilized the Sterlitech crossflow cells in their method and are listed here to illustrate the potential applications for crossflow filtration. These studies are good references for understanding the operation of the Sterlitech’s crossflow cells.
Application Study Citation Reverse Osmosis (Desalination) Sachit, Dawood Eisa. "Analysis of reverse osmosis membrane performance during desalination of simulated brackish surface waters." Journal of Membrane Science. 453. (2014): 136-154. Forward Osmosis and Low Pressure Reverse Osmosis Yangali-Quintanilla, Victor, Zhenyu Li, et al. "Indirect desalination of Red Sea water with forward -
April 29, 2015
Sterlitech is proud to offer Synder Filtration’s recently developed ultrafiltration membranes, the PX, PY, and PZ Polyacrylonotrile (PAN) membranes, as pre-cut test coupons, sheets, and disks. Designed to be ideal for oil removal in wastewater treatment applications, these new membranes can fill critical process requirements where the presence of oils in industrial effluent hinder downstream processes. “New regulations on industrial wastewater discharge and quality requirements for water reuse make it increasingly necessary for companies to find an efficient and cost-effective method to separate emulsified oils from wastewater,” said Sterlitech President Mark Spatz. “We added the PX, PY, and PZ membranes to provide our customers an alternative to existing standards and help them find the best fit for their application.” The new PAN membranes have molecular weight cut-offs (MWCO) of 400 kDa (PX), 100 kDa (PY), and 30 kDa (PZ) and, in addition to excelling at oil removal, Synder’s PAN
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April 29, 2015
As part of our continuing commitment to provide the latest innovations in filtration technology, Sterlitech will soon be introducing polycrylonitrile (PAN) membrane filters. These new membranes are made from electro-spun PAN nano-fibers on a polyethylene substrate layer. Their unique construction and PAN's hydrophillic nature gives our new membranes a high flux rate without sacrificing selectivity, even under low pressures. If you're looking for a fast-flowing 0.2 micron filter, then keep an eye out for these on our website in the coming weeks. You can also contact us directly to learn more about them.
