Abstract: A process for separating a first gas from a second gas, having the steps of: (1) contacting one side of a semi-permeable gas separation membrane with a feed gas mixture containing at least the first gas and the second gas, wherein the membrane divides a separation chamber into a high-pressure side into which the feed gas mixture is fed and a low-pressure side; (2) maintaining a pressure differential across the membrane under conditions such that the first gas in the feed gas mixture selectively permeates through the membrane from the high-pressure side to the low-pressure side of the membrane; (3) removing from the low-pressure side of the membrane permeated gas mixture which is enriched in the first gas and depleted in the second gas; and (4) removing from the high-pressure side of the membrane a gas mixture which is enriched in the second gas and depleted in the first gas.

Abstract: A vapor recovery apparatus is provided with an automatic flow control system. The apparatus includes first and second reaction vessels. Each reaction vessel holds a bed of adsorbent for adsorbing volatile liquid vapor and producing relatively volatile liquid vapor-free air. A vacuum pump is provided for regenerating the beds of adsorbent. A cooler and/or absorber tower is provided to recover volatile liquid vapor generated during bed regeneration. Conduits are provided for the passage of air-volatile liquid vapor mixture between the various components of the apparatus. A series of valves direct the flow of the air-volatile liquid vapor mixture through the conduits. The automatic flow control system includes a vacuum transmitter for monitoring air pressure within the apparatus at a selected point and a controller responsive to the sensed pressure for controlling the operation of the valves.

Abstract: A method for the design and performance of a process such as scrubbing, stripping, heat transfer from one stream to another, and removal of particulate constituents from a gas stream.

Abstract: Essentially pure nitrogen gas is produced from air and stored by an intermittent, automatic, and unattended process that is compact and self contained. Air is first filtered, compressed and enters a nitrogen module containing a permeable membrane that selectively separates nitrogen from the air and discharges oxygen and other gases. The nitrogen gas then flows into a vessel for storage. The apparatus is enclosed in a housing where automated temperature and pressure controls allows the permeable membrane to separate air components. A discharge hose allows use of the nitrogen product for a variety of intermittent applications including vending for inflation of tires, filling portable nitrogen vessels, and use in other processes needing intermittent and automatic manufacture of nitrogen gas.

Abstract: The invention relates to a thermal desorption device for a gas chromatograph, having a thermostatically controlled oven (1) provided with a carrier gas connection and having an evaporator tube. In this case, the evaporator tube is an interchangeable sample holder tube (5) which can be held by a holding chamber (2) in the oven (1), which sample holder tube can be fitted into a holder piece (6) with one end externally sealed by a seal (8), the holder piece (6) having two seals (9) arranged separated in the region of its casing and being capable of being fitted into a correspondingly designed holder (10), the carrier gas connection (14) opening in the region (12) of an annular gap (13) between the holder (10) and the holder piece (6) between the two seals (9) located on the casing, which annular gap (13) is, for its part, connected to an annular gap (15) surrounding the inserted end of the sample holder tube (5), a trap (18) being connected downstream.

Abstract: Carbon dioxide is removed from a gas stream by passing the gas stream through a bed of natural or synthetic clinoptilolite or their chemically-modified derivatives. The process is particularly advantageous when applied to the removal of ppm levels of carbon dioxide from gas streams at temperatures above 20.degree. C.

Abstract: The present invention is a composition, a synthesis of the composition and a method of using the composition for selectively adsorptively separating nitrogen from oxygen wherein the composition is a crystalline EMT with a Si/Al ratio less than 2.0 and a micropore volume determined in the sodium and/or potassium form of at least 0.20 cm.sup.3 /g and a lithium cation exchange of at least 80%, preferably including an intergrowth with a crystalline FAU structure, wherein the pure or intergrowth compositions have the chemical formula:M.sub.2/n O:X.sub.2 O.sub.3 :(2.0 to <4.0)SiO.sub.2wherein M=one or more metal cations having a valence of n, and X is selected from the group consisting of aluminum, gallium and boron, preferably aluminum.

Abstract: The present invention relates to an organic-solvent vapor adsorbing apparatus which includes a rotor containing an adsorbent and having tubular draft passages arranged in a direction of the rotational axis thereof. Plate-like separators disposed along a radial direction of the rotor define a plurality of zones. A treatment zone is provided for removing organic solvent vapor from a gaseous stream passed therethrough and into the adsorbent. A regeneration zone is also provided for removing the organic solvent from the adsorbent by a heated air stream passed therethrough. Finally, a purge zone is provided for cooling the adsorbent with cool air. Air exiting the purge zone is merged with the heated air stream which is introduced into the regeneration zone.

Abstract: The membrane deaerator according to the present invention includes a plurality of membrane deaerator modules and a water sealed vacuum pump connected thereto. These modules are series-connected between a raw water supply line and a deaeration water supply line. A first vacuum pump is connected to a first deaerator module via a deaeration line, and a second vacuum pump is connected to a second deaerator module via the deaeration line. These vacuum pumps are each provided with a seal water supply line which is used to send the raw water introduced from the water supply line thereinto as seal water to each of the first and second vacuum pumps. A discharge line for the second vacuum pump is connected to the deaeration line for the first vacuum pump. In the membrane deaerator thus formed, the deaeration performance is improved greatly, and a deaeration with dissolved oxygen concentration of several PPB can be carried out.

Abstract: A system is provided for recovering volatile-liquid vapor from an air-volatile liquid vapor mixture. The system includes a reaction vessel having a bed of adsorbent for adsorbing volatile liquid vapor and producing relatively volatile liquid vapor-free air. The system further includes a liquid seal vacuum pump for regenerating the adsorbent, a first conduit for circulating the air-volatile liquid vapor mixture through the system and a second conduit for circulating seal liquid to the vacuum pump. A cyclonic separator separates the seal liquid from the air-volatile liquid vapor mixture produced during bed regeneration. A mechanism is also provided for removing the volatile liquid vapor from the air-volatile liquid vapor mixture separated from the seal liquid. A method of recovering volatile liquid vapor from an air-volatile liquid vapor mixture is also disclosed.

Abstract: An improved adsorbent composition for a natural gas-fired, adsorption cooling system that readily adsorbs moisture from ambient air, while being readily regenerated at high temperatures up to 200.degree.-300.degree. C. in order to provide an enhanced coefficient of performance to the system. Such an adsorbent composition may comprise an A-type zeolite, an X-type zeolite or a chemically modified Y-type zeolite either alone, in conjunction with each other or in conjunction with alumina and/or silica gel. A rotating adsorbent wheel may be fashioned from corrugated paper comprising the adsorbent composition and a slurry of synthetic, organic fibers which are preferably polyaramid fibers. The strength of the wheel may be enhanced by surface treating it with sols or salt solutions of alumina or silica, and a highly temperature-stable epoxy or phenolic resin.

Abstract: A bag (1) for filtering dust-laden gas in a bag filter that extends between a perforated plate (22) having holes (23) and support and positioning structure adjacent to a far end (17) of a filter box, is in the form of a tubular bag made from a U-shaped tube (1) having a flexible filtering wall that is permeable to the gas but that retains the dust transported thereby, the gas penetrating into the bag (1) and flowing in filtered form to an end opening (1f) of the wall that opens out in a hole (23) of the plate (22). The U-shaped tube of the bag (1) is mounted in the enclosure in such a manner as to present two tubular filtering lengths (1a, 1b) that are substantially parallel, with the base (1c) thereof being pinched to form a substantially gastight joint and being disposed towards the far end (17) of the enclosure. The invention is applicable to bag filters for cleaning dusty premises, and to filtering discharges made to the outside.

Abstract: A process is described for the separation of a mixture of substances by sorption of the mixture's components on two different sorption agents, which are individually and independently adjustable in their sorption properties, and is performed in a manner by which the mixture of substances to be separated is introduced into a separation chamber between the surfaces of the sorption agents, and in which the separation chamber is occupied by a gap medium, in which the mixture's components can be dissolved and/or dispersed and/or evaporated, while the phases containing the sorption agents move in opposing directions, and the separated components of the mixture held on the sorption agents are recovered after passage through the separation path. This process is characterized in that the separation chamber is formed by at least two or several hollow, concentrically superimposed cylindrical disks Z.sub.A and Z.sub.B, which are filled with structural elements, and which contain separation media Ph.sub.A and Ph.sub.

Abstract: A container for a plurality of molecular sieve beds for use in a pressure swing oxygen concentrator. An extrusion defines at least two and preferably at least three passages extending between open ends of the extrusion. The extrusion ends are closed by first and second end caps secured to the extrusion. Two of the passages form separate molecular sieve containers and a third passage may form an accumulator for storing concentrated oxygen. In a preferred embodiment, the first end cap has separate inlet ports for each molecular sieve container and an outlet port for the accumulator. The second end cap has separate outlet ports for each molecular sieve container and an inlet port for the accumulator.

Abstract: The invention relates to a biological filter for the purification of waste gasses, which filter is provided with a bed of pelletized biologically active compost carrier material. The invention also relates to a method for the production of the spherical biologically active material without the use of additives. According to the invention the biologically active compost carrier material is present in the form of very stable spherical pellets. The bed of pelletized biologically active compost carrier material consists of one or more layers.

Abstract: An electrically powered dehumidifier is provided which has no moving mechanical parts. The dehumidifier employs convection of a deliquescent solution around a fluid circuit having vapor permeable windows. The apparatus is driven by a solid state electronic heat pump, such as a Peltier effect solid-state heat pump, for example.

Abstract: A micro-rotary screener for removing airborne materials from an airstream includes a shell for defining a generally drum-shaped shell, the shell including a first passageway for receiving the airstream and a second passageway for discharging cleaned air. A multi-blade rotating air lock within the shell includes an odd number of rotor lock blades for defining an odd number of pockets into which the airstream is directed. A drive is provided for causing the multi-blade rotating lock to rotate. Seals are attached to the rotor lock blades for contacting inner portions of the shell and restricting airflow between the plurality of pockets. Screens are attached to the edges of the rotor lock blades, and rotate therewith, for filtering airborne materials and for releasing filtered materials during rotation of the multi-blade rotating air lock. A material-discharge bin is provided for receiving filtered materials after they have been released from the screens.

Abstract: An adsorption process in which high and low pressure feed streams are introduced into a plurality of beds to produce product streams by adsorbing one or more preferentially adsorbed components within the beds. Each bed is subjected to a low pressure feed stage to produce a low pressure product stream followed by a high or higher pressure feeding stages to produce one or more high pressure product streams. Thereafter the beds are regenerated through depressurization and purge stages. The cycle is conducted out of phase so that one of the beds is producing the high pressure product stream while another bed is producing a low pressure product stream.

Abstract: A container for particulate desiccant comprises a cup and a cap. The cup includes spaced inner and outer wall portions connected by a transverse web portion to define a chamber having an opening for receiving the desiccant. The cap is designed for receipt in the chamber to cover the opening. In addition, the cap has a hole for receiving the inner wall portion of the cup. The inner wall portion includes a stepped inner surface defining an intermediate flange for preventing a canister pipe from passing completely through the inner wall portion. The inner wall portion also includes a beveled inner end surface which tapers radially inwardly in a direction toward the transverse web portion to facilitate insertion of the canister pipe into the inner wall portion. An inner wall extension portion is coaxially joined with the inner wall portion at a web side of the cup to facilitate return of dehydrated air or fluid to an air conditioning system.

Abstract: Deodorant comprising 5 to 100% by weight of a calcium phosphate compound having a molar ratio of Ca/P of 0.8 to 2.0, a deodorant sheet and filter sheet containing such calcium phosphate compound, and a functional paper containing 10 to 80% by weight of a calcium phosphate compound. A filtering medium for an exhaust gas comprises a ceramic material containing 5 to 100% by weight of a calcium phosphate compound, as well as a filter cartridge and exhaust gas filter containing the filtering medium. Based on the excellent properties of the incorporated calcium phosphate compound, the agents and products according to the present invention exhibit a highly improved adsorptivity to oil-soluble substances, odor substances, animal or vegetable cells, viruses, biopolymeric substances or other substances, and therefore can be advantageously used in various fields of technology. For example, the functional paper can be used as a deodorant, filter medium and adsorbent as well as a flame-retardant paper.