The present invention relates to a method for curing adhesives used in the manufacture of membrane modules containing polymeric membranes, particularly polyimide based membranes used for the nanofiltration or ultrafiltration of solutes dissolved in organic solvents using microwaves. To maximise the chemical resistance of the adhesive used in these organic solvent applications, it must be as fully reacted and crosslinked (“cured”) as possible. Typically, thermal processing (heating) of the entire membrane module is used to cure the adhesives. However, the time and temperature required to achieve this high degree of completion of reaction may damage the separation performance of the membrane contained within the membrane module. In one particular aspect, this process utilises microwaves to preferentially promote the curing of epoxy adhesives over the general heating of the membrane module.

A process for producing nitrogen-rich air by feeding high temperature air at 150° C. or more to an air separation membrane module is described. After being placed at 175° C. for two hours, the air separation module exhibits a shape-retention ratio of 95% or more in one embodiment. The nitrogen-rich air can be fed to a fuel tank for an aircraft, for example.

A thermally sterilizable fluid filter (10) for concentrating substances contained in a fluid by way of micro-, nano- or ultrafiltration of the fluid, particularly for concentrating a pharmaceutical precursor and/or intermediate, in particular a vaccine, in a fluid. The fluid filter has a filter housing with a fluid inlet, a retentate outlet and a permeate outlet. A filter cartridge is arranged in the filter housing (12) and has a filter medium of a ceramic material and/or a ceramic composite material. The filter cartridge is held with axial play on the filter housing.

Disclosed are a pressurized-type hollow fiber membrane module having a pressure resistance higher than 3 kgf/cm.sup.2 and a filtration system comprising the same. The pressurized-type hollow fiber membrane module comprises: a body case having an open end; a fixing member disposed in the body case at the open end; a hollow fiber membrane potted in the fixing member; and a cap on the open end of the body case, the cap and fixing member forming a filtrate-collecting space, wherein a lumen of the hollow fiber membrane is in fluid communication with the filtrate-collecting space, the fixing member has a step so that an upper side surface of the fixing member is not in contact with an inner surface of the body case, and a portion of the cap is inserted in a groove defined by the step of the fixing member and the inner surface of the body case.

An adhesive composition suitable for reverse osmosis modules, the adhesive composition includes (I) a polyurethane composition that includes (A) an isocyanate group-containing pre-polymer comprising a reaction product of (i) castor oil or a derivative thereof; and (ii) a polyisocyanate; and (iii) optionally a second polyol; and (B) an isocyanate-reactive polyol mixture comprising: (i) a polybutadiene polyol; and (ii) a urethane catalyst; and (iii) optionally the second polyol; and (II) a plasticizer wherein the adhesive composition is essentially free from diluent oils and solvents.

A spiral separation membrane element including a plurality of separation membrane pairs wound around the outer peripheral surface of a water collection pipe, wherein the plurality of separation membranes include at least two sets of separation membrane pairs in which two adjacent separation membranes are stacked such that the water supply sides of the separation membranes form opposing surfaces, and the water supply-side surfaces at the ends of separation membranes close to the water collection pipe and parallel to the lengthwise direction of the water collection pipe are sealed by a sealing material.

The invention relates to a filter device (10) serving to filter a liquid, in particular for treating water. The filter device comprises: at least two plate-shaped filter elements (12) and at least one holding element (20) for filter elements (12). According to the invention, the holding element (20) comprises a holding frame (22), a grout material (26), and an end unit (24), which is separate from the holding frame (22), wherein the grout material (26) is arranged between the filter elements (12) and the holding frame (22), such that the grout material seals the filter elements (12) against the holding frame (22), that the end unit (24) is fastened on the holding frame (22) in a liquid-tight manner, and that the holding frame (22) and the end unit (24) delimit a liquid collection chamber (40).

A fluid filter and method for filtering fluid feed using the fluid filter is described. The fluid filter comprises an upper disk plate having a first compartment spaced apart and placed parallel to a lower disk plate having a second compartment. The feed fluid enters the first compartment in a first vortex pattern in a first direction at a first temperature, and a permeate fluid enters the second compartment in a second vortex pattern in a second direction opposite the first direction at a second temperature, wherein the second temperature is lower than the first temperature. A hydrophobic, vapor permeable membrane positioned between the upper disk plate and the lower disk plate allows vapor to pass from the first compartment to the second compartment having the permeate fluid, thus filtering the feed fluid.

A portable water conditioning system is provided that includes an incoming water inlet; a reverse osmosis stage in fluid communication with the incoming water inlet, the reverse osmosis stage having a permeate outlet and a concentrate outlet; a diversion device having a diversion valve, the diversion valve placing the concentrate outlet in fluid communication with a waste water outlet; a deionizing stage in fluid communication with a pure water outlet; a bypass valve configured to selectively place the permeate outlet in fluid communication with one or more of the waste water outlet, the deionizing stage, and the pure water outlet; and a controller configured to control the diversion device and the bypass valve to provide water at the pure water outlet of a desired condition.

A filtration element including a cylindrical housing enclosing a fluid filtration media extending along an axis (X) between opposing ends with a first and second end cap located at each end, wherein each end cap includes: i) an annular surface co-extensive with the housing, and ii) outer face laying in a plane perpendicular with the axis (X). The outer face of at least one end cap comprises an annular groove. A face seal including a base is located within the annular groove. A flexible lip extends axially from the base and axially beyond the outer face of the end cap and is adapted to engage with an abutting outer face of an end cap of an adjacently positioned filtration element.