Abstract: A method and an apparatus are disclosed for classifying particulate substances. A mix of heavier and lighter particles is confined between upwardly divergent side walls and a fluidizing gas is blown into the mix from below. A conveying conduit is arranged below the sidewalls and has vertical conduit portions which have upper open ends communicating with the space between the sidewalls. A classifying gas is blown through the conduit and the conduit portions at a pressure which is higher than that of the fluidizing gas to keep the lighter particles from entering the upper open ends, but which is sufficiently low so that the heavier particles can overcome the pressure of the classifying gas and drop through the upper open ends into the conveying conduit from which they are periodically expelled by bursts of a transporting gas.

Abstract: Coal is preheated prior to passing it into a coking installation by feeding measured amounts of the relatively wet coal into and through one or more circulation dryers heated to an elevated temperature and collecting the hot coal in a collecting bin and automatically measuring the level of the hot coal in said bin and automatically adjusting the amount of coal fed into said dryer depending on the level of coal measured in said collecting bin. Means are provided for preventing further adjustment of the coal feed rate should the exhaust gas temperature of a dryer fall outside the limits of a preselected preset temperature range and to bring the process back under level-actuated feed rate control once the exhaust gas temperature moves back within the preset range.

Abstract: Apparatus for purification of waste water includes an upright adsorber filled with active carbon passing in downward direction through the adsorber while waste water flows in upward direction therethrough. A distributing arrangement at the region of the lower end of the adsorber, into which waste water is fed, is provided to assure a substantial even distribution of the waste water during its upward flow through the carbon column. Furthermore, a regulating arrangement is provided to regulate the flow of the carbon through the adsorber in dependence on the concentration of the organic contaminants adsorbed by the carbon.

Abstract: A reaction vessel for regenerating particulate adsorbents has a bottom outlet and top inlets for admission of the adsorbent to be regenerated by being heated to a regeneration temperature, and for a particulate regenerating material at a temperature above the regeneration temperature. The mixture of the adsorbent with the regenerating material forms a bed in the reaction vessel and is continuously withdrawn through the outlet so that the bed descends toward the latter and is replenished from above under the formation of a cone at the upper region of the bed. A plurality of tubular baffles coaxially surrounds the inlets which are also coaxial with one another, each of the tubular baffles penetrating into the bed in the region of the cone and retards the flow of the particles of the mixture down the slope of the cone in that the particles must pass underneath the baffle to flow to the next baffle.

Abstract: A heating wall of a coking oven, particularly a horizontal coking oven, separates the coking chamber of the coking oven from the heating flues through which a heating medium flows to heat a charge of coking coal which is contained in the coking chamber. The heating wall is provided with a plurality of individual compartments which are separated from each other and also from the coking chamber and from the heating flues, the compartments being situated between the coking chamber and the heating flues and increasing the rate of heat transmission through the heating wall. Depending on the desired heat-transmission properties of different portions of the heating wall, the compartments may be distributed either uniformly or nonuniformly, or may have the same or different dimensions. The heating wall is constituted by refractory blocks and the enclosed compartments are provided in these refractory blocks.

Abstract: A process for the manufacture of anthraquinones in which o-benzyl-toluene is first oxidized with 25 to 50 weight-% nitric acid at atmospheric pressure and moderate temperatures, and then further oxidized with a more dilute nitric acid at elevated temperatures and pressures to yield crude o-benzoyl-benzoic acid. The crude product is then esterified with methanol, the methyl ester distilled and, when necessary, recrystallized, and heated with concentrated sulfuric acid to yield anthraquinone in high yield and of a high degree of purity.

Abstract: A process for the manufacture of anthraquinone, in which o-benzyl-toluene is oxidized with air or an oxygen-containing gas in an acetic acid solution in the presence of cobalt, manganese and bromine salts as catalysts, to which solution sufficient acetic anhydride is added to bind the reaction water, thereby keeping the acid concentration constant. The crude o-benzoyl-benzoic acid is then esterified with methanol, the methyl ester distilled from the reaction mixture and heated with concentrated sulfuric acid to yield anthraquinone in good yield and of a high degree of purity.

Abstract: A process is provided for the production of an aciculate textured coke from pitch comprising the steps of filtering at least two different bituminous coal tar pitches having differing softening points at an elevated temperature to form a mixture of the filtrate having a viscosity of 50-200 centipoise at 250.degree.-260.degree. C. and producing an aciculate textured coke by coking said mixture.

Abstract: A charged adsorbent is accommodated in a desorbing vessel and in an intermediate container which communicates with the desorbing vessel. The charged adsorbent is desorbed in the desorbing vessel by contacting the same with a heat carrier, such as with hot sand, and a desorption gas which develops during the desorption of the charged adsorbent in the desorbing vessel is passed through the charged adsorbent accommodated in the intermediate container to capture at least one component of the desorption gas in the charged adsorbent present in the intermediate container. The purified desorption gas is withdrawn from the intermediate container, and the regenerated adsorbent is gradually discharged from the desorbing vessel and the supply of the adsorbent in the desorbing vessel is replenished by charged adsorbent from the intermediate container. The desorption gas is cooled during the passage thereof through the charged adsorbent present in the intermediate container.

Abstract: Coal is passed in a two-stage process through a drying and heating zone. The coal coming from the drying zone is separated from the heat carrier gas which is then passed into the atmosphere after going through an electrodust separator. The dried coal is delivered into the heating zone. The hot gas for the heating zone is furnished by a combustion device. The exhaust gas from the heating zone is separated from the heated coal which is recovered while the exhaust gas is passed back into the drying zone. Part of the hot combustion gas coming from the combustion chamber is branched off and passed into the exhaust gas coming out of the drying zone either directly behind the drying zone or behind the separator for separating the dried coal from the exhaust gas. The temperature of the exhaust gas from the drying zone is thus prevented from sinking below the sulfuric acid dewpoint or water vapor dewpoint which might result in corrosive damage to the apparatus, particularly to the electrodust separator.

Abstract: Coal is dried by passing it successively to two tubular flow-through circulation heating elements together with a heat carrier gas, withdrawing the partially dried coal emanating from the first heating element and passing it into the inlet end of the second heating element and recovering the substantially dry coal from the gas and coal mass emanating from the second heating element, the hot vapors received from the outlet end of the first heating element being recirculated after mixing them with fresh combustion gases into the second heating element and the heat carrier gas emanating from the second heating element after separation of the coal therefrom being passed after mixing with fresh combustion gases into the first heating element.

Abstract: A multipartite rock bolt includes a plurality of individual discrete elems which are connected to each other at their respective end portions to constitute the rock bolt which is anchored, especially cemented, in a hole of the rock to be consolidated by the rock bolt. The end portions of the elements have complementary recesses therein at which the respective assembled elements overlap each other and the connecting arrangement for connecting the respective end portions includes a projection, particularly a pin which extends transversely of the elongation of the element into the recess and is received in a complementary aperture, particularly a hole, provided at the recess of the other element. The recess is partially bounded by a detaining surface extending substantially longitudinally of the element, and the detaining surface may be inclined relative to the elongation of the element.

Abstract: The present invention relates to a two-compartment cartridge which is suitable for securing stay bars in bore holes by means of polyurethane resins and which is destructible by the stay bar, containing a polyisocyanate component on the one hand and a polyol component on the other hand, distinguished by the fact that the polyisocyanate component used is an aromatic polyisocyanate or a mixture of aromatic polyisocyanates, while the polyol component used is a polyol containing tertiary amine nitrogen and having a molecular weight of from about 119 to 3000 or a polyol mixture containing at least one such polyol.

Abstract: A regenerator lining for regenerator chamber cells in coke ovens, comprises a stone or brickwork having either a honeycomb or lamellar structure, with a plurality of gas passages extending therethrough and terminating in openings on the top and bottom sides of the structure. The transverse portions or sides are made of frame portions having a material thickness of up to 20mm. The webs or spacing between the openings is up to 10mm in thickness. In the case of circular, hexagonal, or similar shape passages, the openings have diameters of up to 16mm and in a construction which includes a slot formation, the slots are made up to 16mm wide.

Abstract: A pneumatic stowing apparatus for use in underground mine galleries for pneumatically transporting mine waste resulting from blasting operations, mainly comprises a housing in which an element forming at least one chamber is movable between a material receiving position in which such mine waste is filled through an inlet opening in the housing into the chamber and a material-discharging position in which opposite open ends of the chamber are respectively aligned with openings in opposite end walls of the housing, through one of which compressed air is blown over a valve into the chamber so that the mine waste in the latter is transported to a point of use through a discharge conduit connected to the opening in the opposite end wall of the housing, a motor to move the chamber forming element between the positions thereof, and a member for opening and closing the valve in timed sequence with the movement of the chamber forming element.

Abstract: A method of manufacturing a briquetted coke from fine coal comprises carbonizing the coal at a temperature of from around 600.degree. to 900.degree. C., mixing the carbonized coal with approximately 10 to 80% and preferably from 20 to 40% of fine coal well caking coal, and thereafter hot briquetting the mixture at temperatures of from around 300.degree. to 500.degree. C. A fuel for shaft furnaces preferably includes the use of the hot briquettes as the only solid fuel in the shaft furnace, and it is particularly applicable for blast furnaces.

Abstract: A tubular one-way closure for injecting a material, particularly synthetic plastic foam material, into a hole has a throttle channel through which the material is to be injected, and a central tube rotatable about its axis and movable in its axial direction. The closure also comprises an expandable anchoring member actuated by said central tube so as to anchor said closure in said hole while being expanded, and an elastic sealing member also actuated by said central tube so as to seal said hole after anchoring of the same.

Abstract: A carbonaceous adsorbent in the form of a shaped body which has been heated to about 400 to 1400.degree. C in an inert atmosphere is composed essentially of a mixture of finely divided carbonaceous material of a grain size below 50 and up to below 100 microns with a binder composed of about 1 to 20% by weight of a natural or synthetic elastomer and about 1 to 15% by weight of a thermoplastic material. The adsorbent is made by subjecting the mixture to a shaping step followed by heating to a temperature of about 400.degree. to 1400.degree. C in an inert atmosphere which step may be followed by an activation of the carbonaceous material.

Abstract: Coal-containing shaped bodies are made by intimately mixing particulate coal with 10 to 30 percent by weight of a polymer. The mixture is shaped by subjecting it to a pressure between about 295 and 3430 newtons per square centimeter. Shaping takes place within a temperature range of 100.degree. to 250.degree. C. The shaped bodies have high compressive and bending strengths and can be precisely dimensioned.

Abstract: Coal-tar pitch is heated to a temperature which is at least 100.degree. C above its softening point but below its decomposition temperature and is mixed with a filter aid, such as kieselghur or activated carbon prior to filtering the pitch at at least the preheat temperature so as to remove ashes, soot and heavy metals therefrom. The thus-purified pitch is then coked. In this manner, it is possible to obtain high-quality, anisotropic acicular coke which is readily convertible into graphite.