Abstract: A device for producing a block of solidified carbon dioxide essentially comprising a high pressure vessel of liquidified carbon dioxide, a thermally insulated high pressure feed tube and a molding box in which a product of solidified carbon dioxide is molded in the form of block, wherein the molding box contains a single molding chamber in a cubic structure which consists of a top cover, a pair of first side walls, a pair of second side walls and a base board, each of which members is designed so as to be easily assembled or disassembled, said first and/or second side walls being formed with a plurality of openings through which gaseous medium flows and being provided with a layer of filter fixedly secured to the inner wall thereof respectively. The base board and the second side walls are formed with engagement grooves for allowing the first and second side walls and base board to be easily assembled or disassembled. Further locking means are provided for ensuring tight locking of the molding box.

Abstract: Apparatus for recovering chlorocarbons from a vent gas stream which additionally contains a halogen, including an inlet means connected to a source of the gas stream and a heat exchanger means for receiving the stream from the inlet means. The heat exchange means has a cooling capacity sufficient to reduce the temperature of the stream to less than about -60.degree. F. at a pressure of at least 60 psig. Finally, separator means are provided for receiving the stream at the reduced temperature and include means for separating the liquid from the vapor at that point.The apparatus and the method of using the same is particularly suited for use with vent gas streams containing at least 1000 ppm of carbon tetrachloride and approximately 0.2 to 20% of a halogen, particularly chlorine, based upon the weight of the carbon tetrachloride. Preferred operating conditions are from about -60.degree. F. to about -70.degree. F. at a pressure ranging from 80 to 90 psig.

Abstract: In the process of transferring coke from a coke oven chamber in a battery of coke ovens to a quenching car, the coke is quenched by a water spray from above. The resulting steam is collected in a hood located above and movable with the quenching car and is either exhausted from the hood and conveyed to a condenser or is condensed in the hood with the condensate being collected, cooled and recirculated to provide the water for the quenching and condensing sprays. The apparatus and method of this invention provides for transferring and quenching the coke without emitting harmful gases and dust to the atmosphere.

Abstract: Apparatus comprising a vertical vessel having a lower downwardly pointed conical shell portion, an intermediate shell portion and an upper shell portion wider than the lower and intermediate portions and with all said vessel portions surrounding and defining an unobstructed interior; a conduit for feeding a liquid stream, containing solids less dense than the liquid, tangentially to the vessel intermediate portion interior so that the liquid flows in a helical path therein and then flows downwardly to and in the lower conical portion whereby less dense liquid slurry concentrates in the central area of the lower conical portion and flows upwardly into the vessel upper portion while more dense liquid slurry concentrates in the vessel lower conical portion; a conduit to withdraw more dense liquid slurry from the vessel lower conical portion; and a distributor for directing washing liquid onto the slurry while the slurry is in the vessel upper portion.

Abstract: A method and apparatus for removing particulate matter from a gaseous stream, such as air, includes a hood having an inlet to receive the incoming stream containing the particulate matter and an open base spaced within defined limits from a receptacle containing a particle-entrapping liquid. Means for maintaining the liquid at the desired level are also disclosed.

Abstract: A method and equipment are disclosed herein which liquefy and separate air through the use of a multiple rectifying tower system comprising a high pressure tower and a low pressure tower. The rectifying regions of the high pressure tower and the low pressure tower are divided into an equal number (at least two) of segments and gases at the tops of the respective segments of the high pressure tower are permitted to exchange heat with circulating liquids or liquid oxygen at the bottoms of the respective segments of the low pressure tower and to evaporate the circulating liquids or the liquid oxygen. The gases are then condensed to provide a circulating liquid for the low pressure tower.

Abstract: A reagent and a method for using the reagent for treating a solid material disposed in a liquid medium and having an oxygen-controlled surface condition. The reagent includes a liquid hydrocarbon, a reducing material and an activator material. The liquid hydrocarbon such as mineral oil has a specific gravity different from the specific gravity of the liquid medium. The reducing material such as phosphorous pentasulfide is present in an amount sufficient to establish a reducing environment around the solid material for breaking the oxygen control on the surface of the solid material. The activator material such as zinc thiophosphate is present in an amount sufficient to establish an electrostatic charge on the solid material after the oxygen-controlled surface condition has been broken. A more specific feature of the invention is directed to the method of flotation of extremely fine bituminous coal having an oxygen-controlled surface condition.

Abstract: An extender oil characterized as having a viscosity at 100.degree. F. in a range of about 40 to about 250 SUS and an aromatic content in the range of about 60 to about 85 wt % of the total collector composition of which about 10 to about 20 wt % of the total collector composition is chosen from among benzothiophenes and dibenzothiophenes. The above-described extender oil blended with the tall oil in a ratio of tall oil to extender oil in a range of about 75 wt %: to about 25 wt % to about 25 wt %:about 75 wt %. The extender oil described above blended with a fatty amine in a ratio of fatty amine to extender oil in a range of about 50 wt %:50 wt % to about 10 wt %:90 wt %. The flotation process for recovering phosphates and/or potash employing the compositions described above.

Abstract: In a pumped liquid oxygen plant the liquid oxygen is vaporized and warmed against part of the feed air which is compressed in compressor (15) and divided into a first sub-stream (20) at 56.4 bars A and a second sub-stream (16) at 42 bars A. The first sub-stream (20) is cooled against the evaporating oxygen in the heat exchanger (17). It is then expanded at valve (21) and the largely (on a molar basis) liquid product is fed to the high pressure column (10) through pipe (22). The second sub-stream is cooled in heat exchanger (17) and is then expanded in generator loaded expander (18). The cold gas in then used to cool the first sub-stream in heat exchanger (17) and is recycled to the compressor (15).

Abstract: The invention is a new design of chuck door which has a knife-edge sealing strip that fits tightly in a slot of the door and is adjustable longitudinally by jacking screws. The strip is locked in position also by screws. The inside of the chuck door is provided with a cavity within which heat insulation refractory material is retained. A pivoted heat shield hangs from extended side heat shields in the coke oven and pivots up to allow entry of the leveler bar through the opening closed by the chuck door. The design is readily adaptable to new and to existing oven doors.

Abstract: Coke is dry cooled in a shaft-like cooler by gases conveyed through the coke. The cooler comprises a top antechamber below a charging opening, a cooling chamber under the antechamber and having a gas inlet and a coke outlet at the bottom end. Between the antechamber and the cooling chamber, there is a cylindrical wall having a gas inlet. The cooling chamber is divided by radial walls which abut a central masonry core and divide the chamber into three shaft-like chambers to insure uniform descending of the coke. A prop is placed at the center of each component shaft for deflecting the descending coke from a central region. Cooling gas is supplied through a pipe having a downwardly-directed opening below a central masonry core. Additional cooling gas is supplied by an annular chamber surrounding a cone at a coke outlet of the cooling chamber.

Abstract: Method and apparatus for the recovery of the solid material content of solutions and/or suspensions as granules in a gas fluidized bed which contains particles, the composition of which is identical with that of the solid material in the solution and/or suspension to be processed, in which fluidized bed the solution and/or suspension is sprayed onto the surface and/or interior of the hot gas, especially hot air fluidized layer, and from which fluidized bed particulate material is continuously withdrawn at a mass flow rate corresponding to the solid material content of the liquid phase sprayed in, and also, in which system a grinding mechanical effect is created by forcing continuously particles formed in the fluidized bed through at least one slit of controllable clearance, located in the fluidized layer, itself, in order to produce in a single technological step, in a single apparatus particulate material of predetermined, given particle size distribution.

Abstract: A coke cooler and method of operating the cooler is disclosed for dry cooling hot glowing coke through the recovery of the sensible heat of the hot glowing coke. The apparatus includes a vertically elongated vessel having walls partially formed with integral heat exchange tubes for the passage of a liquid coolant and a shroud having an internal prechamber mounted in the upper end of the vessel for receiving a charge of the hot glowing coke. The shroud cooperates with the vessel to provide a annular passage for fluid flow therebetween of a gas which directly contacts the hot glowing coke for direct cooling while liquid coolant is passed through the tubes for indirectly cooling the coke.

Abstract: A cooling device for dry cooling of coke by a counterflow of gaseous cooling medium has a prechamber, a housing including upper and lower parts, a conduit for discharging a gaseous cooling medium, wherein the prechamber form with the housing an annular space of an increased cross-section in the region of the discharge conduit, the prechamber is connected with the housing by a plurality of mounting members distributed over the periphery of the prechamber, and two sliding joints are provided of which one sliding joint slidingly connects the upper wall with the lower wall, and the other sliding joint slidingly connects the prechamber with the upper wall.

Abstract: A spray drying apparatus with a drying chamber (10) in which a liquid product is atomized by means of an atomizing wheel (11) and dried by means of warm drying gas or flue gas introduced through a tube (14) which is directed towards the bottom side of the atomizing wheel. In order to avoid adherence of particulate material present within the drying chamber (10) to the bottom side of the atomizing wheel (11) clearing or obstructing gas, preferably atmospheric air, is blown upwardly towards the bottom side of the atomizing wheel from a clearing gas inlet (18).

Abstract: The apparatus comprises a driven rotatable shaft carrying at its working end rotary scraper means and a tapered centering device in advance of the scraper means which is freely rotatable with respect thereto. The shaft end carrying the scraper means and the centering device is connected to the driven portion of the shaft by a universal joint. The scraper means are connected to the shaft behind the universal joint by several circumferentially spaced spring-loading means which normally keep the scraper means and centering device normal to the shaft but which permit those means to tilt relative to the shaft if the latter is angularly misaligned with a clean-out opening. Thus, the scraper tools are always in contact with a flat cover seat. The centering means have outwardly extending stops which make contact with the cover seat and limit the penetration of the centering means into the ascension pipe opening.

Abstract: A method is disclosed herein for treating the gaseous effluents emitted from a nuclear reactor, said method being adaptable for treating either gaseous effluents produced during normal reactor operations or combustible and fission product gases released as the result of a nuclear reactor system failure. The treatment comprises sequential direction of the gaseous mixture through a multiplicity of adsorbent beds, each of said beds being preferentially adsorptive towards at least one component of said gaseous mixture, whereby to effect the desired separation by substantially either thermal-swing, cryogenic, or rapid cycle adsorption techniques.

Abstract: When vinyl chloride resin slurry containing vinyl chloride monomer is contacted with steam in counterflow manner in a column provided with at least one perforated plate having a downcomer to remove the monomer, the lower surface of the plate is washed by hot water injection, whereby clogging of the small holes of the perforated plate is prevented.

Abstract: A method of making ethylene consisting in processing an ethylene gas condensate which is passed through a de-ethanizer to separate as gases the C.sub.2 -hydrocarbons with two carbon atoms, cooling said hydrocarbons to condensate a part thereof, feeding said hydrocarbons into a separator where the condensed phase is separated and recycled to the de-ethanizer, and feeding the non-condensed fraction of said hydrocarbons into an ethylene-recovering unit with which is associated a reboiling system for heating the fluid taken from said unit prior to recycling it to the latter, and further comprising the step of exchanging heat between the hydrocarbons from the de-ethanizer and the reflux fluid from said reboiling system so as to at least partially condensate the hydrocarbons fed to said separator.

Abstract: A process for the selective froth-flotation of sulfidic, oxidic and salt-type minerals, whereby an ore is first wet ground to the flotation fineness to obtain a slurry and then the obtained slurry is prepared and froth-flotated. In addition to the collector agent a polysaccharide, lignosulfonate, quargum and/or a surface active additional chemical is used which prevents the collector agent from adhering to the silicate surfaces and passivates active silicate mineral surfaces, or weakens the hydrophobia of minerals to which the collector agent has already adhered. The collector agent and the additional chemical may be added as early as the wet-grinding stage.