Abstract:
A method of separating a polyisoolefin elastomer from non-polymeric components in an organic solvent involves ultrafiltration of a solution of the polyisoolefin elastomer and non-polymeric components in an organic solvent through a semipermeable membrane to substantially retain the polyisoolefin elastomer in a retentate and provide the non-polymeric components in a permeate. Advantageously, stabilizers for the polyisoolefin elastomer are retained in the retentate along with the polyisoolefin elastomer, permeate flux through the membrane is higher as concentration of the polyisoolefin elastomer in the solution increases up to a concentration limit, the separated polyisoolefin elastomer in the retentate has a molecular weight that can be substantially unchanged even when ultrafiltration is conducted at elevated temperature and the amount of polyisoolefin elastomer in the permeate is unmeasurable providing an oligomer-rich permeate uncontaminated by polyisoolefin elastomer.
Abstract:
Membrane filter (1) comprising a plurality of ceramic honeycomb filter elements (2), each element comprising a plurality of parallel ducts (7) separated by walls (8) and open on a face (3) for introduction of the liquid to be filtered, an interstitial volume (6) between said filter elements (2), a filtration membrane arranged on the inner surface of the walls of the ducts (7), in which said filter elements are connected together by means of a curable material (4) that forms, after curing, a sleeve (9) in the form of a single part that firmly attaches, by sealing all of said filter elements (2) separated by the interstitial volume (6), said sleeve having a thickness e of between 1% and 10% of the length of the filter, and the curable material (4) being present in the open porosity and throughout the entire thickness of each porous wall (8) constituting the elements (2) over a non-zero minimum height h.
Abstract:
In solid-liquid separation of a saccharified liquid by filtration through a microfiltration membrane, the filtration performance can be increased by adjusting the lignin content in a pretreated product derived from a cellulose-containing biomass to not more than 8.5% to promote formation, on the membrane surface, of a cake in which the solid component in the saccharified liquid is concentrated. Collection of the cake formed on the membrane surface allows efficient solid-liquid separation of the saccharified liquid with the microfiltration membrane.
Abstract:
Electrochemical purification apparatuses for treating water and methods of assembling the devices are provided. The apparatuses may be cross-flow electrochemical devices. The devices may be assembled and sealed through masking and application of a potting material. The devices may comprise various structures configured to improve the current efficiency of the device, reduce leakage, and improve the distribution of potting material to the assembly.
Abstract:
A high velocity cross flow dynamic membrane filtration system includes a disc membrane assembly having a frame and at least two support shafts. Each support shaft defines a longitudinal axis about which is positioned a plurality of axially spaced membrane discs, with each shaft further coupled to the frame. A permeate tube is coupled to each support shaft and in fluid communication with the membrane discs associated with that support shaft. A vessel defines a treatment chamber and is configured to removably support the disc membrane assembly within the treatment chamber. The vessel further includes a wall. The filtration system also includes a drive system. The permeate tubes are configured to extend through a portion of the vessel wall when the disc membrane assembly is positioned within the treatment chamber. The permeate tubes are further configured for rotation by the drive system.
Abstract:
An improved tangential filtering method, in particular for filtering organic liquid products in the food processing sector, of the type which uses a tangential filter (3) comprising at least one filtering element (6), along which the fluid product to be treated is intended to flow in parallel so as to separate the permeate, which is collected and extracted through at least one permeate outlet, from the retentate, which is then reintroduced into the filter itself by means of a recirculation circuit (18), characterized in that: - the speed/flow rate of the product to be treated is detected by means of a speed/flow rate sensor (22) positioned inside the recirculation circuit (18), in which a centrifuge pump (20) for recirculating said product to be treated is also provided, - the speed/flow rate detected by means of said sensor (22) is periodically compared with at least one predetermined value, and the activation of a device (38), which cleans said filtering elements (6) without interrupting the filtering, is controlled on the basis of such comparison.
Abstract:
The invention concerns a method for quantitative determination of nitrogen present in the form of one or more nitrogen containing compounds and/or ions thereof in an aqueous fluid, the method includes subjecting at least a part of the aqueous fluid to an NMR reading including generating a 14N data having a 14N NMR data spectra and correlating the 14N NMR data to calibration data. A system suitable for carrying out the method as well as a moveable manure spreader including a system is also described.
Abstract:
The present invention provides tangential flow filtration devices and methods for enriching a heterogeneous mixture of blood constituents for leukocytes by removal of non-leukocyte blood constituents. In one particular embodiment the device can provide a composition enriched in monocytes. One embodiment includes a remover unit (1) having a crossflow chamber (3) separated by a microporous filter (5) from a filtrate chamber (4), the remover unit (1) also having a tangential flow inlet (6), a fluid outlet (7) for a fluid enriched in leukocytes and a filtrate outlet (8).
Abstract:
Electrochemical purification apparatuses for treating water and methods of assembling the devices are provided. The apparatuses may be cross-flow electrochemical devices. The devices may be assembled and sealed through masking and application of a potting material. The devices may comprise various structures configured to improve the current efficiency of the device, reduce leakage, and improve the distribution of potting material to the assembly.
Abstract:
The invention concerns a system for and a method of determining a least one quality parameter in an aqueous fluid. The method comprising subjecting at least a sample of the aqueous fluid to a cross-flow filtration in a cross-flow filter, separating the aqueous fluid into a permeate fraction and a retentate fraction, performing NMR reading on the retentate fraction using an NMR spectroscope, collecting NMR data from said NMR reading and correlating the collected NMR data to calibration data to determine said at least one quality parameter of the aqueous fluid.