Abstract: A cryogenic air separation method for the production of oxygen and medium pressure nitrogen comprising a primary higher pressure column and an auxiliary smaller lower pressure stripping column wherein primary column bottom liquid is employed as stripping column downflow liquid and primary column top vapor condenses against stripping column bottom liquid to generate stripping vapor.

Abstract: Multiple bundle fluid separation apparatus having at least two hollow fiber membrane bundles arranged in end-to-end linear series encased in a shell or casing. The bundles are in communication with a core tube and are connected serially in such fashion that one end of one bundle is connected to one end of its adjacent bundle. There is also present an auxiliary permeate tube to convey permeate to a permeate exit port. The casing has appropriate ports for feed inlet, and retentate and permeate outlets.

Abstract: This invention relates to a method of conducting a joining/coating operation which provides good wetting of metal-comprising substrate surfaces by metal-comprising filler/coating materials while reducing the rate of metal oxide formation. The joining/coating operation is carried out in a controlled oxidizing atmosphere having an oxidation capability greater than that required to oxidize a metal-comprising filler material used for joining or a metal-comprising coating, but having less oxidation capability than that of air. Typically the controlled oxidizing atmosphere consists essentially of nitrogen and oxygen, wherein the oxygen concentration is controlled at a set point. The range of the setpoint corresponds with an oxygen concentration which can range from greater than about 10 ppm to about 100,000 ppm, depending on the application.

Abstract: Semipermeable membranes comprised of certain sulfonated substituted polysulfone polymers containing the polymer repeat unit (A) or (B) as herein defined. The invention also pertains to processes for using said membranes for the selective permeation of at least one gaseous component from a mixture of gases containing said gaseous component in admixture with other gaseous components.

Abstract: Method and apparatus for improving xenon recovery wherein a liquid containing krypton and xenon is removed from a cryogenic rectification facility at a defined flowrate which selectively improves xenon recovery and is provided into a facility having rare gas production capability.

Abstract: Process for the dehydration of gases using composite permeable membranes, preferably hollow fiber composite membranes comprised of a porous support coated with an ultrathin layer of a defined sulfonated polysulfone or sulfonated polyether ketone. The processes also contemplate the use of a sweep or purge gas on the water-enriched permeate side of the composite membrane to increase the efficiency of the dehydration process.

Abstract: Gas distribution system including main, lateral and loop conduits in which gas flow is continuously provided between a source of pressurized gas and venting means so that "dead space" is avoided in the distribution system and continuous real time monitoring of system gas is enabled.

Abstract: System and method for controlling process fluid flow to maintain a set delivery pressure at varying demand, including a fluid-loaded, self-operated main regulator and a method for providing the loading pressure therefor. The system also includes a flow restrictor for metering the loading fluid flow, a back-pressure regulator for controlling the loading fluid pressure, and a temperature-actuated regulator for venting loading fluid when the process fluid temperature varies from a selected range.

Abstract: Processes and apparatus for the thermal treating of articles, particulary for the quench hardening of metal alloys in an improved fluidized bed containing from 21 to 60 weight percent of fine alumina particles having a size from 20 to 100 microns and from 40 to 79 weight percent of coarse alumina particles having a size from 150 to 2000 microns.

Abstract: The dispersion of a gas in a liquid is enhanced by the use of an adjustable conical mixer to control the flow of a gas/liquid mixture to a venturi device used to accelerate the mixture to a supersonic vclocity with subsequent deacceleration to subsonic velocity to produce sonic shock waves in the mixture.

Abstract: Permeable membranes comprised predominantly of specifically defined tetrabromobisphenols and aromatic dicarboxylic acids. The invention also pertains to the novel permeation processes for recovery of an oxygen/nitrogen or carbon dioxide/methane component form a mixture of said component with other components.

Abstract: Gas samples withdrawn from within a reactor vessel (or process in general), as well as from one feed gas thereto, are passed to gas analyzers for particular components or impurities desired to be measured. The response time of the reactor analysis system employed is advantageously minimized by the elimination of dead gas space within the system and the provisions for rapid purging of the system or of individual gas analyzer feed lines. The flexibility of the system to measure both particular gas sample components and periodically present impurities using the same analytical instruments is generated by the addition of an in-line reaction system comprised of reactant addition means and/or catalyst means to individual sample lines leading to particular analytical instruments.

Abstract: A system comprising a stripping column and a nitrogen rejection unit wherein a significant portion of the feed to the nitrogen rejection unit is provided at an increased pressure thus reducing product compression requirements.

Abstract: A gas cylinder having a valve on one end and an internal tube having at least one perforation. The tube extending from the valve through the majority of the length of the cylinder. A charging and a gas delivery method employing the perforated tube permits the gas or gases to be mixed.

Abstract: A medical magnetic resonance imaging method for use with human and veterinary patients or subjects employing stable neon to provide contrast enhancement sufficient to provide both qualitative images and quantitative physiological information to assist in diagnosis, physiological challenges, the selection of pharmaceutical or surgical therapy and the assessment of the effectiveness of therapy.

Abstract: A turboexpander with improved efficiency wherein fluid is introduced into the rotatable assembly at a negative incidence angle and expanded within the rotatable assembly along a pressure balanced flow path.

Abstract: A pressure swing adsorption process and system for air separation includes a variable volume nitrogen product storage vessel, which is monitored to determine variations in user product demand. The processing cycle and individual processing steps are adjusted during periods of reduced demand to maintain a desired product purity and pressure, with power reduction and energy savings being achieved under turndown conditions.

Abstract: A method for separating nitrogen and methane by cryogenic distillation wherein methane residue is turboexpanded to generate refrigeration to drive the separation.

Abstract: A trailer for cylindrical fluid containers, particularly compressed gas tubes, arranged in modules individually removable from the trailer. Each module has a front and a rear bulkhead between which tubes are supported. The tubes have reduced cylindrical ends which protrude through and are supported in openings in the bulkheads. At least one end of the tubes is threaded and clamped by a nut or a collar flange to a bulkhead. Each bulkhead has a stiffening, right-angle flange along each vertical edge which aligns with and is clamped to each adjacent module. At their bottom, the bulkheads abut and are attached to an upwardly extending side of an L-shaped structural member, the other side being mounted to the trailer frame. The tubes are arranged in line horizontally and vertically with space between them.

Abstract: A membrane system is positioned within an insulated enclosure heated to maintain superheat conditions for the feed gas to the system, wherein individual membrane modules are not insulated. The feed gas compression heat is desirably used to supply the superheat to the feed gas within the insulated enclosure.