Polymeric Membranes filter caustic and acidic chemicals.
Press Release Summary:
Polymeric PCI tubular membranes incorporate proprietary polymeric substrates that allow them to withstand solutions with pH values from 1 to 14 at high processing temperatures. Caustic and acid-resistant membranes can suit filtration requirements covering nanofiltration and ultrafiltration spectrums. Resistant to solvents, membranes are used to separate one liquid into two streams: concentrate and permeate.
Original Press Release:
New Polymeric Membranes from PCI Filter Caustic and Acidic Chemicals
As energy costs increase and discharge limits are reduced because of environmental legislation, processors are coming to depend on membrane filtration for a variety of chemical recovery and waste reduction applications. Often this requires processing of high temperature caustic or acidic streams, which, in turn, usually requires expensive ceramic or metallic membranes. Recently, however, PCI Membrane Systems, Inc., introduced polymeric membranes that meet these needs more cost-effectively.
The PCI tubular membranes can incorporate proprietary polymeric substrates that allow them to withstand solutions with pH values from 1 to 14, even at high processing temperatures. Caustic and acid-resistant membranes can be tailored to suit a range of filtration requirements covering the nanofiltration and ultrafiltration spectrum. Use of these membranes is not only beneficial for filtration of extreme pH solutions but also where aggressive cleaning is necessary to maintain filtration rates in less extreme pH processes. As with other membranes produced by PCI, these membranes are also resistant to a wide range of solvents.
Membranes are used to separate a liquid into two streams: the concentrate and the permeate. Membrane filtration plants use a semi-permeable material that acts as a barrier to solutes of a particular molecular weight. By applying a pressure across this barrier, liquid containing low molecular weight material is driven from one side to the other. The material left behind in the filtration system is known as the retentate or concentrate, while the liquid that flows through to the other side of the membrane barrier is referred to as the permeate or filtrate. Where wastewater is being treated, the membrane is used to remove BOD, COD and other contaminants. Membrane filtration can also be used for the purification or recovery of valuable by-products.