Your source for new information on filtration equipment applications and processes.
Sterlitech is launching new flat sheet membranes from Microdyn Nadir: NP010 and NP030. Both NF membranes have a Polyethersulfone (PES) active layer and Polyethylene/Polypropylene (PE/PP) support layer. NP010 and NP030 are chemically resistant and can be used at high temperatures, which makes them suitable for applications such as acid/caustic preparation, and for the metal and chemical industry.
Product NP010 NP030 Manufacturer Microdyn Nadir Microdyn Nadir Applications Acid/caustic preparation, metal and chemical industry Acid/caustic preparation, metal and chemical industry pH Range 0-14 0-14 Permeate Flux (lmh1)/psi >200/580 >40/580 Na2SO4 35-75% 80-95% Polymer PES Active layer, PE/PP Support Layer PES Active layer, PE/PP Support Layer
1 LMH stands for Liter per Meter Square Membrane Active Area per Hour
These new additions are available in large sheets, as well as in precut coupons for use in the Sepa CF, CF042, and CF016 filtration cells, and most stirred cells. Custom membrane sizes are also available upon request. For more information about NP010 and NP030 or if you need assistance to find products suited for a specific application, please contact Sterlitech. To browse our complete selection of NF membranes or to place an order with us, click here.
Friday, December 20, 2013The closest most people get to using a membrane filter happens when they slide a paper filter into a coffee machine each day for their morning brew. That realization gave us a great idea for a practical gift that we know many of you could use: a handsome coffee mug monogrammed with Sterlitech’s logo.
From now until the end of January, with any order from the Sterlitech website or the Glass Fiber Store, you can enter the coupon code “MUG 2014” to claim a free coffee mug. However, our supply of mugs is limited, so pay us a visit and claim yours
Monday, December 12, 2016
Our skid mounted membrane filtration systems are specifically designed to bring a new level of ease to bench scale testing of membrane filters and small batch processing. The goal for developing this product was to help our customer do what they do best – research and develop – and minimize time plumbing, wiring and waiting! We are also aiming to ship each skid mounted system within 2 weeks of purchase date. Already in use in many academic and industry R&D labs for applications such as membrane development, quality assurance, materials research and batch production of micro biologicals, chemicals, pharmaceuticals and others, these skid mounted systems increase productivity and establish consistency in experimental design. Organizations with several different interests can quickly adjust operating parameters to meet an assortment of testing goals. Benefits include: Plug in ready Multiple configuration options Certified at factory to be leak and trouble free Pre and post-sales technical support ensures users receive optimized equipment and are provided with Sterlitech’s operational training webinar within one week of delivery. Each webinar is interactive and is tailored to the skid design and to the needs and skill level of its users. To obtain more information about Sterlitech’s Skids view the Sepa skid animation or contact a Membrane and Process Development expert at Sterlitech at 1-877-544-4420 or firstname.lastname@example.org.
Wednesday, December 07, 2016
Sterlitech Corporation is proud to announce the launch of gold-sputtered polycarbonate membrane filters. “Why gold? What is sputtered?” you may ask. Well, some particles are just too small to see with an ordinary light microscope, for these things we need get down to details not seen by traditional microscopy. Scanning Electron Microscopy (SEM) is a powerful tool that uses a focused beam of electrons to resolve some of the smallest objects. But in order to see anything at this level, the sample must be prepared correctly. Gold is very conductive and won’t corrode (NASA wraps many of their satellite probes in gold-coated blankets to protect them) and polycarbonate filters have a smooth focal plane for keeping everything in view under a microscope; gold-sputtered polycarbonate filters bring these two attributes together into an ideal platform for visualizing innumerable tiny objects with the SEM’s powerful eyes. A key factor in using SEM is mounting the object to be visualized in such a way that electrons emitted from the SEM microscope can accurately depict the size, shape, and depth of the object, without the electrons building up into a large blurry image of static electricity. Electron microscopy works because electrons have a much shorter wavelength than visible light, and can show the most minute details such as single chromosomes, dangerous asbestos fibers in the workplace, or the delicate deposits of pollen on a flower’s stamen (image above). Gold sputtered polycarbonate filters (PCTG) are made by heating a small piece of gold wire (called the target) above the membrane in a vacuum chamber. Gold atoms fly off the hot wire and land on the polycarbonate membrane below, depositing in a smooth ultrathin layer only 20-40 nanometers in thickness; by comparison, a human hair is about 100,000 nanometers thick. The finished coated filter provides the ideal surface in which to collect very tiny objects and hold them under the narrow beam of focused electrons from the SEM. These new filters are ideal tools for environmental monitoring, capturing and visualizing the smallest particles, and surveying the workplace for dangerous airborne particles like asbestos. These filters will now be offered alongside Sterlitech’s comprehensive line of membrane filters for the industrial and R&D communities. Our PCTG filters will be first offered in 0.4 and 0.8 micron pore sizes, and in 13, 25, and 47mm diameter discs (custom sizes/shapes may also be available). To learn more about how these filters can help your research in the finest of details, talk to one of our technical specialists at email@example.com.
Monday, November 07, 2016
Precision membrane filters in pore sizes larger than 5.0 microns are hard to come by, but not at Sterlitech. One of our more popular membrane materials is Polyethersulfone (PES). The membranes are ideal for use with difficult biological solutions that tend to clog most other polymer filters, and the 0.2 micron pore size PES filter is the industry standard for sterile filtering of liquids. Sterlitech PES binds very little protein and has a very asymmetric pore structure lending to improved performance. The largest pore size available previously was only 5.0 micron, but this material frequently suffered from long lead times due to increased demand. Sterlitech has implemented steps to ensure current product availability, not only for the 5.0 micron PES filters, but now 8.0 micron as well! PES is very hydrophilic and shows outstanding performance in a wide range of applications. The larger pore sizes perform very well under high particulate loads from biological solutions, such as cell lysates, surface water, and sewage analysis. The material’s asymmetry allows it to also function as its own pre-filter when placed open-side up to the feed liquid! The PES filters are available in almost all standard lab disc sizes from 13mm up to 293mm and can also be offered in sheets and roll stock options, as well as custom-cut dimensions. Curious to see if these filters would help your separation processes? Give us a call and we can help!
Wednesday, November 02, 2016
A large part of extracting commercially important compounds from plants involves passing a type of solvent over plant material, then filtering out any plant debris and undesirable by-products. This latter filtering process can be difficult to optimize if too many undesirable compounds inadvertently come along for the ride; so how can you speed things up? In several states, cannabis sativa (AKA: marijuana) is being processed in this way to extract the active compounds THC and CBDs for medicinal use; four of these states have already passed legislation permitting recreational use, and more states are expected to do the same in the next few years. The process to extract THC and CBDs from cannabis is usually done by passing liquefied butane, supercritical CO2, or cold ethanol over the plant material. These processes are very efficient at extracting the compounds, but also need a secondary filtering process (often called “winterizing’ in butane extraction methods) to remove plant debris and/or naturally-occurring lipids and waxes. Our Botanical Extraction (BE) filter kit and related 90mm diameter membranes have proven very useful to this area in producing a clean extract, especially in winterizing, and can yield about 2-4L of filtered ethanol extract in about 20 minutes. Sometimes, however, more is needed than can be done with a single BE kit. You may be thinking of looking for a large filter cartridge assembly to go big or go home, but this may not be the best way to go. Whether you consider a vacuum-driven filter approach, or a pressure-driven one, the points to consider are economics and complexity. Vacuum filter systems are the staple of labs everywhere. Why? Because they are simple, easy to use, inexpensive, and usually work very well with a myriad of different membrane filters, based on the application. A single vacuum filter system can easily process up to 1 liter at a time; although by using a large receiver flask you can often bump this up to 4L, just like our BE kit above. Pressure-driven systems do have their advantages, (very high processing volumes, high-pressures) but are usually better served in other application areas such as water processing or the petrochemical industry where the added cost and complexity are warranted. Most pressure-driven systems require the use of several control valves, bypass lines, relief valves, high-pressure pumps, and more – they can easily become complex systems. If a single BE kit is not quite enough processing power, you may find benefit from a manifold system. Sterlitech just introduced a 3-place manifold kit to pair alongside a trio of 90mm diameter glass filter funnels; this setup quickly transforms the filtering output of a standard single-place setup to 3 times that of the single BE kit! Manifolds can be an optimal way to add processing speed to a critically important process, and allow for less down-time and a lower cost-per-unit of finished product. In many cannabis processing facilities, these simple changes can increase your output of purified extract, leading to more business out the door and a greater return on the bottom line. To learn more about these setups and how they may help you ramp up your production, please contact one of our knowledgeable technical reps today.
Wednesday, November 02, 2016
Sterlitech is pleased to offer an Acrylic version of the Sepa Test Cell. The Sepa Test Cell is a bench-scale filtration unit designed to offer researchers fast and accurate data to easily evaluate the performance of membranes and/or the membrane separation processes. Acrylic Sepa Cell Features and Benefits: Enables to visually investigate the hydrodynamic conditions in the cell or the local fouling of the membrane No need for Cell Body Holder or Hydraulic Hand Pump Designed for low pressure applications of up to 400 psi (27.5 bar) With a membrane active area of 140 cm2 (24 in2) Accepts polymeric flat sheet membrane coupons Mimics both laminar or turbulent flow conditions How it works: The Sepa crossflow system provides continuous bench-scale filtration unit that efficiently simulates the flow dynamics of larger, commercially available membrane elements such as industrial spiral wound membrane elements, by using a combination of Stainless Steel (SS) shims, feed spacers, and membranes. Please visit the Crossflow Cell System Components page for the list of all the parts and equipment required to build a complete filtration system configured with Sepa cell and other cross/tangential flow cells Sterlitech offers. To obtain more information about Sterlitech’s Acrylic Sepa Cell, contact a Membrane and Process Development expert at Sterlitech at 1-877-544-4420 or firstname.lastname@example.org.