An adsorption process for xenon recovery from a cryogenic liquid or gas stream is described wherein a bed of adsorbent is contacted with the aforementioned xenon containing liquid or gas stream and adsorbs the xenon selectively from this fluid stream. The adsorption bed is operated to at least near full breakthrough with xenon to enable a deep rejection of other stream components, prior to regeneration using the temperature swing method. Operating the adsorption bed to near full breakthrough with xenon, prior to regeneration, enables production of a high purity product from the adsorption bed and further enables oxygen to be used safely as a purge gas, even in cases where hydrocarbons are co-present in the feed stream.

A solid fiber has a modified cross-section which satisfies the following (a) to (b): (a) a modification degree Do/Di, in a cross section of the solid fiber, is 1.20 to 8.50 when the inscribed circle diameter is denoted by Di and the circumscribed circle diameter is denoted by Do; and (b) a porous specific surface area of the fiber is not less than 30 m.sup.2/g. An adsorbent material comprises not less than 28 vol % of the porous fiber as a fiber bundle. A purification column is formed by arranging the adsorbent material in the straight form in an axis direction of a plastic casing and by attaching an inlet port and an outlet port of a fluid that is to be treated to both ends of the plastic casing. The porous fiber can efficiently adsorb a removal target substance in the fluid that is to be treated, and a purification column incorporates the porous fiber.

A chromatographic separation column for characterizing surfactant purity is disclosed. The column includes a separation medium having a particulate porous substrate with monofunctional silane with diisopropyl side chain groups and a pendant cyano functional group held within a column. The porous substrate has a pore size of about 50 ? to about 500 ? and an average particle size of about 1.0 ?m to about 100 ?m. The column has an inner diameter of about 1.0 to 100 mm, e.g., 4.6 mm and a length from about 10 mm to about 250 mm. Methods of facilitating characterization of polysorbate 80 by providing a sample containing polysorbate 80 and one or more reaction products of polysorbate 80 and a chromatographic separation column are disclosed. Methods of characterizing polysorbate 80 by separating polysorbate 80 and one or more reaction products of polysorbate 80 are also disclosed.

A device for purifying protein from a protein-containing fluid includes a prefilter unit, which has at least one size exclusion filter, a membrane adsorber unit, which has at least one porous membrane with functional constituents which adsorb the protein to be purified, and a collecting container. The collecting container, the membrane adsorber unit and the prefilter unit are configured such that the collecting container is suitable for receiving the membrane adsorber unit; and the membrane adsorber unit is suitable for receiving the prefilter unit. An associated method for purifying protein from a protein-containing fluid using the device is also disclosed.

The chromatographic column is a stainless steel column having a stationary phase of porous monolithic polymer chemically bonded to the interior wall of the stainless steel column so that the stationary phase is fixed and immobile and does not require frits or other seals to retain particulate matter or a slurry in the column. The inner wall of the column is oxidized and then vinylized with a difunctional linker to chemically bond the polymer to the column. The difunctional linker may be 3-(trimethoxysilyl) propyl methacrylate, vinyl trimethoxysilane, 3-mercaptopropyl trimethoxysilane, or glycidoxypropyltrimethoxysilane. The monolithic polymer is prepared in situ in the column by radical polymerization of a monovinyl monomer with a crosslinking divinyl monomer. The column may be a conventional stainless steel column (? inner diameter), capillary micro-LC ( 1/16), or nan-LC (( 1/32).

An adsorption apparatus and associated method for capturing a target gaseous adsorbate from an atmospheric air based gaseous feed stream. The adsorption apparatus includes a housing enclosing at least one adsorption element for adsorbing the target gaseous adsorbate, at least one substrate coated with an adsorptive composite coating that comprises at least 50 wt % metal organic framework and at least one binder, the housing having an inlet through which the gaseous feed stream can flow to the adsorption element and an outlet through which gas can flow out from the housing; and a desorption arrangement in contact with and/or surrounding the at least one adsorption element.

Disclosed are silica bound zeolite adsorbent particles which possess high volumetric gas adsorption capacity for the adsorption and/or desorption of gases. The adsorbent are highly effective as a gas source in volumetrically constrained applications. The silica-bound zeolite adsorbents possess a relatively high zeolite content simultaneously with a relatively low intra-particle pore volume as compared to the clay bound zeolite aggregates heretofore used as a gas source in volumetrically constrained environments, e.g. instant beverage carbonation processes, devices or systems.

The present invention relates to a sorbent for extracting polar components from a sample where the sorbent comprises a cross-linked polymer comprising nitrogen containing cyclic compounds, for example 1-vinylimidazole and/or 4-vinylpyridine. The invention further relates to a method of producing said sorbent and the use of the sorbent.

Provided is a guard column including a filling part having a length of 2.0 cm to 3.5 cm formed of a filler, in which the filler is made of porous silica gel having a hydrophilized surface and an average particle size of 1.5 ?m to 2.5 ?m, and a pressure difference when an aqueous solution is fed at a linear flow rate of 2.1 cm/min is 4.0 MPa or more.

A roll of absorbent socks is provided with a liquid permeable sleeve that houses an absorbent layer with a superabsorbent polymer. Perforated regions are provided spaced apart along the length of the sleeve with a plurality of perforations through the sleeve and the absorbent layer. The perforations define the end of a first sock and the adjacent end of a second sock. Mechanical closure members are provided on opposed sides of and adjacent to each perforated region. When a sock is separated from the role, it has first and second longitudinally spaced apart ends that are closed by the mechanical closure members to prevent superabsorbent polymer from flowing out the ends of the sock.