Abstract: A high efficiency gas dissolution system is used to dissolve gas in a portion of a body of liquid, improving gas utilization and reducing associated energy requirements. A portion of the body of liquid is recirculated through a mechanical, in-line gas dissolution device wherein a secondary feed gas is dissolved in the liquid.

Abstract: A cryogenic air separation system comprising at least two columns wherein two portions of the feed air are turboexpanded at two different temperature levels to generate refrigeration, a third portion is condensed against vaporizing product from the air separation plant, and all three portions are fed into the same column to undergo separation.

Abstract: An argon purification system comprising an ambient temperature molecular sieve adsorption step, an ambient temperature chemisorption step, and a cryogenic temperature adsorption step, particularly useful with liquefaction of the purified argon.

Abstract: A system for assisting the implementation of an environmental compliance program using microcomputer hardware and software to automatically revise the test sampling frequency of potentially hazardous substances based on estimates of risk of exposure derived from sample data.

Abstract: Very high purity nitrogen is produced by air separation in a three stage membrane system in which the third stage permeate is recycled to the second stage and the membrane surface area is distributed between the stages to achieve high product recovery and process performance. Other gas separations, such as argon from oxygen, can likewise be achieved by thus using a three stage membrane system.

Abstract: A rotary kiln system wherein oxidant injection means are positioned at each stationary end and inject oxidant toward each other creating gas recirculation within the rotary kiln for improved mixing, combustion efficiency and temperature uniformity.

Abstract: Combustion method and apparatus establishing coherent jet oxidant flow within a cavity recessed from the main combustion area enabling operation without need for water cooling.

Abstract: A crude neon production system wherein a small neon-containing stream is taken from a cryogenic air separation plant and processed in a neon column and in a non-cryogenic pressure swing adsorption system to produce crude neon and wherein tail gas from the pressure swing adsorption is recycled back into the air separation plant.

Abstract: A cryogenic distillation system employing a multisection column wherein structure packing of different packing density is employed in at least two sections of the column.

Abstract: A method for anesthetizing a patient comprising providing to the patient for breathing stable xenon, oxygen and helium and a gas mixture suitable therefor.

Abstract: A single-state apparatus for injection molding structural foam articles has a resin plasticating barrel in which a cylindrical plunger reciprocates and rotates. The plunger has a screw section for plasticating resin and advancing the plasticate into a metering section with grooves in which plasticate flows. The grooves are contiguous to a fluid foaming agent inlet in the side of the barrel so that they alternately open and close the inlet to introduce fluid foaming agent periodically into the plasticate. Downstream, the plunger has channels for mixing and advancing plasticate to the forward end of the plunger where it accumulates and is periodically rammed by the plunger into the mold.

Abstract: A method and apparatus for producing elevated pressure nitrogen with improved recovery comprising a primary column and a lower pressure auxiliary column wherein auxiliary column top vapor is condensed, pressurized and passed into the primary column.

Abstract: A cryogenic air separation system comprising at least two columns wherein a portion of the feed air is turboexpanded to generate refrigeration, one part is condensed against vaporizing product from the air separation plant, another portion of the feed air is condensed against vaporizing higher pressure product from the air separation plant, and all of the resulting feed air streams are fed into the same column to undergo separation.

Abstract: The invention relates to a process for obtaining a substantially homogenous temperature profile along the length of an incinerator during the incineration of halogenated waste containing materials comprising:(a) providing a mixture containing an aqueous solution and halogenated waste having a preselected heating value;(b) introducing said mixture into the incinerator in the presence of oxidant to engender a flame; and(c) spraying an aqueous solution into or around the flame.

Abstract: A duplex adsorption process is carried out in one or more stages, each having a normal bed portion and an inverted bed portion that enables the less selectively adsorbable light component of a fluid mixture to be displaced from the normal bed portion and the more selectively adsorbable heavy component to be displaced from the inverted bed portion. Pressure swing adsorption and thermal swing adsorption processes can be employed.

Abstract: Enhanced air drying or other gas purifications are achieved using purge gas, rather than product gas, to facilitate permeation in membrane systems having substrates adapted to achieve radial mixing and having countercurrent flow patterns and uniform flow of gas over the surface of the membranes.

Abstract: A method of rapidly quenching articles in a fluidized bed or in a collapsed bed, wherein the bed comprises fine solid particles. A high conductivity gas may be used to transfer heat to or from the fluidized bed or the collapsed bed during at least a portion of the quenching. The high conductivity gas may be used to fluidize the bed during at least a portion of the quenching. The rate of heat transfer from or to the article quenched is improved by moving the article being quenched relative to the quenching bed or by moving the quenching bed about the article.

Abstract: A combustion method wherein separate oxidant mixing zones and fuel reaction zones are established in a combustion zone to dilute oxidant and combust fuel under conditions which dampen NO.sub.x formation.

Abstract: Membrane or pressure swing adsorption systems are used for air separation, with the crude nitrogen stream obtained thereby passing to a catalytic combustion system for reaction of residual oxygen with hydrogen to produce a high purity nitrogen product. Excess hydrogen in the nitrogen product is minimized by controlling the amount of hydrogen employed based on the instantaneous crude nitrogen flow and purity, and adjusting hydrogen ingestion in response to nitrogen product purity feedback. Plant flow rate tracking control limits maximum rates of flow change to ensure stable operation.

Abstract: PSA air separation processes are carried out using low adsorption/desorption pressure ratios, together with special adsorbents capable of desirably adsorbing nitrogen at the upper adsorption pressure level and of readily releasing nitrogen for discharge at the lower desorption pressure level.