Abstract: Wet process phosphoric acid is oxidized with nitric acid so that uranium values therein are in the +6 state. The organic extractant which contacts the acid extracts the +6 uranium and nitrate and/or nitrite ions. Urea is added to the oxidized acid to react with the nitrate and/or nitrite ions so that the organic does not extract them. The organic is reductively stripped with an aqueous solution containing ferrous ions. The efficacy of the ferrous ions is not lost through reaction with nitrate and/or nitrite ions.

Abstract: An open pore liquid purification apparatus containing semipermeable membranes, is made by: (1) placing a module, made of bonded, resin coated filler particles, having a plurality of spaced circular bores therethrough, in a stationary vertical position, (2) placing a viscous casting composition into each of the bores, the composition containing 10 parts polysulfone resin and 10-40 parts of an organic solvent, the solvent being effective to homogeneously disperse and partly dissolve the polysulfone, (3) gravity dropping a casting bob, having a circular cross-section at its widest point, down through each bore to form a continuous film of casting composition on the inside of each bore, and then (4) immediately exposing the film to a low humidity atmosphere, and (5) contacting the film with a suitable leaching liquid, to form a polysulfone ultrafiltration membrane on the inside of each module bore; the membrane being resistant to solvents and operable at a pH of about 1 to 12 and a temperature of about 5.degree.

Abstract: Piston for an internal combustion engine having an upper face which forms a part of an expandable combustion chamber. The piston is provided with a cavity or deep depression formed in the upper face to promote fuel-air mixing as well as to improve the combustion process within said combustion chamber. The cavity is formed within a cup-like insert member, so positioned within the piston body that the cup-like insert is substantially spaced or insulated from the piston body, thereby avoiding or minimizing heat loss to the piston walls.

Abstract: The invention relates to a method and apparatus for operating an internal combustion engine whereby to obtain maximum efficiency concomitant with minimum pollution of the atmosphere due to the discharge of exhaust gases. The engine is fueled with a stratified charge of a combustion supporting gaseous mixture, followed by the force injection of a fluidized fuel. To assure proper combustion, particularly at low loads, the intake volume of said combustion supporting medium is throttled. The conditions resulting within each combustion chamber are enrichment of the combustible charge and higher temperatures. As progressively greater loads are applied to the engine, the throttling action is progressively reduced to maintain a combustible, yet lean, mixture to midload. Further increase in load is accomplished by enrichment through increased fuel input.

Abstract: A rotary piston engine including a casing having a trochoidal inner surface which defines an elongated cavity therethrough. Opposed end walls close said cavity, and a rotary pistion is journalled therein to be driven in a planetary movement, thereby rotating a drive shaft. Apices formed intermediate peripheral piston faces, slidably contact the trochoidal surface during the engine intake, compression and combustion periods. Each of said piston faces is provided with a shaped compound depression comprised in part of a first cavity in which an air-fuel charge is formed, compressed, and ignited. The resulting flame passes into a second or main portion of the compound cavity to ignite the major portion of the charge and complete the combustion phase.

Abstract: A thermal reactor adapted to receive hot exhaust gases generated as the result of the combustion of a hydrocarbon fuel within an engine. The hot exhaust gas stream taken directly from the engine, is passed into a chamber where it reacts with air, preferably in the presence of a reaction promoting element. However, prior to the reaction stage, the hot gas is urged into a swirling motion and through a constricted passageway whereby to provide through a longer dwell period, better mixing, and avoid direct impingement of the gas against the catalyst bed surface when the latter is utilized.