The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are chromatographic materials comprising having a narrow particle size distribution.

This invention employs columns and methods to apply external and internal standards and compounds. Analytical standard or compounds are adsorbed to a solid phase extraction media and are stored indefinitely. The standards or compounds remain stable on the solid phase extraction media without decomposing. The standards or compounds may be removed from the solid phase extraction media with a solvent.

An activated carbon device for adsorbing solvent from a flow of air is regenerated by feeding heated inert gas to the activated carbon and by applying a reduced pressure to the heated activated carbon.

The present invention describes a process to separate ethylene products from impurities such as nitrogen, hydrogen, ethane, propane and isobutane without the need for distillation processes.

Disclosed are embodiments of a filter unit containing a water adsorbent material in the form of water adsorbent particles in a packed bed and a gas adsorbent material in the form of gas adsorbent particles in a packed bed. In embodiments, the gas adsorbent material is downstream from the water adsorbent material in a direction of operation. Further disclosed are methods of preparing and using the filter units.

Methods for purification of a fluorocarbon or hydrofluorocarbon containing at least one undesired halocarbon impurities comprise flowing the fluorocarbon or hydrofluorocarbon through at least one adsorbent beds to selectively adsorb the at least one undesired halocarbon impurities through physical adsorption and/or chemical adsorption, wherein the at least one adsorbent beds contain a metal oxide supported on an adsorbent in an inert atmosphere.

The present invention provides that powder is mainly constituted from secondary particles of hydroxyapatite. The secondary particles are obtained by drying a slurry containing primary particles of hydroxyapatite and aggregates thereof and granulating the primary particles and the aggregates. A bulk density of the powder is 0.65 g/mL or more and a specific surface area of the secondary particles is 70 m.sup.2/g or more. The powder of the present invention has high strength and is capable of exhibiting superior adsorption capability when it is used for an adsorbent an adsorption apparatus has.

A thermal management system includes a space structure, a feed water container, a water feed line, a pump, and a filter device. The space structure includes a heat source connected with a fluid loop for conveying a working fluid through the heat source to regulate temperature and a sublimator connected with the fluid loop to receive the working fluid. The sublimator has a porous surface. The water feed line is connected with the container and the sublimator. The pump is located in the feed water line and is operable to move the feed water from the container to the sublimator. The sublimator is operable to cool the working fluid using the porous surface. The filter device is located in the water feed line between the pump and the feed water container. The filter device includes an adsorbent bed to remove organic compounds.

A process for deodorizing a rosin ester composition is disclosed. The process employs an adsorptive bed containing an adsorbent material. The adsorbent material comprises silica adsorbent having an average pore size between 50-200 Å, BET surface area of at least 300 m.sup.2/g, pore volume of 1.20 to 3.00 cc/g, and a silanol [Si—OH] level of 0.5 to 5 unit/nm.sup.2. The deodorized rosin ester composition has an odor intensity reduction of at least 1 unit on odor intensity scale of Offensive Odor Control Act as compared to the rosin ester feedstock. In embodiment, the deodorizing treatment comprises using multi-staged adsorbent system with an adsorbent column having multiple layers of different adsorbent materials.

The present invention describes a process to separate ethylene products from impurities such as nitrogen, hydrogen, ethane, propane and isobutane without the need for distillation processes.