Abstract: A process is disclosed for allothermic gasification of coal under pressure with water vapor in a gas generator containing heat-exchange tubes for a heat transfer medium. The hot heat transfer medium that enters the gas generator by the heat-exchange tubes is first introduced in the gasification zone, then in the pyrolysis zone. The coal to be gasified flows counter-currently through the gas generator, so that the current of cooled heat transfer medium is used for heating and pyrolyzing the coal, whereas the heat for gasification is taken from the current of the still hot heat transfer medium. Gas generators vertically or horizontally arranged with fitting designs are used for implementation of the process.

Abstract: In rock or roof bolts, in particular combined rigid profile and stretch or strain roof bolts, the bolt bar, except for the bar tip is surrounding by a sheathing tube and the end thereof projecting out of the drillhole mouth is made tensionable with respect to the rock by means of an anchor plate and a screw means. To ensure the immediate loadbearing capability of such a roof or rock bolt, in particular in the filling mortar method, at least one portion (5) of the sheathing tube (3) is provided as expansion element with cutouts (7) distributed into slots (8) and the bolt tip (2) is formed as abutment.

Abstract: For making drill holes, in particular under cramped conditions, an apparatus is used which comprises a drill rod consisting of individual segments and guided in the cradle or slide. The individual segments comprise end pieces which are constructed as centering bushes and guide bushes and are to be pushed into each other in such a manner that the necessary torques and pressure forces can be effectively transmitted from the drilling motor. The drilling motor itself is displaceable between two clamping tongs which fix the drill rod or the individual segments and ensure that the latter form in each case a rigid unit to which the pressure and rotary forces can thus be effectively transmitted. The flushing hose extending in the individual segments is connected via a rotary duct to the guide segment of the drill rod so that said hose itself does not participate in the rotation and can therefore be led with the loosely engaging segments round a curve.

Abstract: Coking system, wherein the coking blends particularly based on hard coal, are fed batchwise to a reactor (1), which is heated indirectly by heat recovery in regenerators (I, II) or recuperators, whereby the reactor is built as a high-capacity coking reactor (100), several high-capacity coking reactors are combined to form a reactor block and the high-capacity coking reactors are built as mutually independent modules, whereby each module can be operated or optionally replaced independently of the neighboring modules, with little or no impairment of the operation of the neighboring modules. The individual reactors are independently operatable in terms of statics and heat supply. The regenerators, or recuperators (I, II, R, R') can be arranged laterally or underneath the reactor chamber. Neighboring reactors can have a common intermediate wall (2). The reactor chambers have a width of at least 0.7 m, a height of at least 8.5 m and a length of at least 18 m.

Abstract: A process for producing a high purity oxygen from air by PSA which comprises connecting a first adsorption unit packed with carbon molecular sieve and a second adsorption unit packed with zeolite molecular sieve in series, conducting PSA operation separately in each of the units during the same operation cycle time, accumulating the desorption gas from the first adsorption unit in a receiver and then introducing the resulting desorption gas to the second unit as a raw material gas and to the first unit as a rinse gas.

Abstract: The present invention relates to a process for strengthening geological formations in underground mining or underground construction work by the introduction of reaction mixtures which react to form polyurethane plastics into the formations which are required to be strengthened, wherein the reaction mixtures are based on(a) a polyisocyanate component,(b) a polyol component and(c) at least one auxiliary agent or additive, characterized in that component (c) contains a cyclic polydimethylsiloxane in the molecular weight range of 222 to 740 and in a quantity of about 0.01 to 5.0% by weight, based on the total weight of components (a) and (b).

Abstract: A fluidized-bed reactor composed of modular steel castings is assembled from a support frame, a sliding frame and reactor housing segments on the frames so as to be able to withstand the temperatures and temperature gradients to which the reactor may be subject.

Abstract: A reactor having a moving layer for the removal of undesirable components for gases has an upright moving-adsorber chamber flanked by jalousie arrays of shutters laterally separating that chamber from a gas inlet chamber and a gas outlet chamber communicating through the jalousies with the adsorbent chamber. The gas inlet and gas outlet chambers, which extend over substantial portions of the height of the adsorbent chamber, are provided with the gas inlet and outlet respectively and are so oriented that the flow of gas through the adsorbent chamber is diagonal across the downward flow of the adsorbent supplied at the top of the adsorbent chamber and removed at the bottom thereof.

Abstract: Process for producing an active catalyst by ammonia treatment of active carbons at high temperatures, in which an active carbon/active coke is impregnated with an aqueous solution of ammonium sulphate, which can be reacted with sulphuric acid, is dried at 120.degree. C. and is then heated in an inert gas stream to temperatures above 350.degree. C. Application of the active carbon catalyst as a reducing and/or oxidizing catalyst, for example for NO.sub.x elimination from exhaust gases using ammonia.

Abstract: Method and apparatus for the removal of sulfur oxides and nitrogen oxides from exhaust gas with the addition of gaseous ammonia at temperatures between 110.degree. and 180.degree. C. The exhaust gas is led across carbon-containing adsorption agent flowing downwardly within a reactor, a portion of sulfur oxide initially being adsorptively removed in a upper part of a travelling bed, with nitrogen oxide catalytically reduced to nitrogen as well as further sulfur oxide being separated in a lower part of the travelling bed. Unloaded adsorption agent is delivered to the upper bed part, partially loaded adsorption agent is removed from that bed part and delivered to the lower bed part without mingling, loaded adsorption agent is removed from the lower bed part and led to a regeneration, after which it is delivered to the upper bed part.

Abstract: The present invention is directed to a process for the strengthening of geological formations in underground workings and mines by the introduction of reaction mixtures which react to form polyurethanes into the formations which are to be strengthened, the reaction mixtures being based on(a) a polyisocyanate component,(b) a polyol component and(c) an ester,the ester having a hydroxyl number of about 10 to 630 and an acid number of at most 10 and obtained from (i) an acid component having a carboxyl functionality of at least 1.5 and containing a polymerized fatty acid having at least 12 carbon atoms or mixtures thereof with unpolymerized saturated or unsaturated fatty acids having at least 12 carbon atoms and (ii) a polyol component containing at least one polyhydric alcohol, the ester being present in a positive amount of up to 5% by weight, based on the weight of component (b).

Abstract: Process for producing carbon molecular sieves for separating oxygen and nitrogen by treating a carbonaceous product with inert gas and steam in a vibrating oven and further treating said product with benzene at a high temperature in a vibrating oven to thereby narrow the existing pores.

Abstract: Use of activated carbon for reduction of nitric oxides with ammonia from exhaust gases using ammonia as reduction agent in the temperature range between 90.degree.-150.degree. C., made from hardcoal, blended with binding agents like pitch, bitumen, tar or tar oil, shaped and subjected to low-temperature carbonization with a heating rate of 20.degree.-100.degree. C./min to temperature between 700.degree.-900.degree. C. in an atmosphere containing 2-5% by vol. of oxygen, so that for the activated coke 2-8% of volatile matter and a surface of 20-150 am.sup.2 /g is arrived at.

Abstract: Pollutant emissions produced during gas turbine power generation with a fuel gas from coal gasification are reduced by initially cooling the fuel gas to a temperature above the dewpoint but between 200.degree. and 400.degree. C. to condense alkalies on dust grains. In the fuel gas, HCl and HF are adsorbed on calcium carbonate and filtration removes the particulates. The fuel gas is reacted with oxygen in the presence of a carbon containing adsrobent to eliminate sulfur, and the flue gas after combustion is catalytically treated with a carbon containing adsorbent to remove nitrogen and sulfur oxides.

Abstract: A chain scraper conveyor having at least one conveyor chain circulating in the conveyor includes drivers which are secured to the chain and which extend from both sides thereof. The drivers include guides that are received in trough channels adjacent the bottom plate of the conveyor. Rollers are provided to support the drivers and to reduce friction.

Abstract: A choker valve assembly for a drill string is provided for transmitting information measured in an underground bore hole by sensing devices, to the surface by modulating the pressure of the flushing fluid. The valve assembly includes a housing that is non-rotatably connected within the flushing fluid flow passage by cross-pieces extending between the housing and a portion of the inner pipe wall. A drag body valve element is mounted by the housing and is axially displaceable with respect to a tapered restriction portion of the inner pipe. Drive means for displacing the valve element is located outside the housing and extends between the valve element and the pipe wall through the cross-pieces. A cap is provided on each end of the valve element.

Abstract: In a process for removal of volatile matter such as ammonia, hydrogen-sulphide, and prussic acid from coke-oven plant water by means of gas in a stripper, the tail gas of an ammonia destruction unit is used as stripping gas. Tail gas from a Claus plant can be proportioned to the tail gas of the ammonia destruction unit.

Abstract: Metal candle-type gap filters are used to remove particles from a hot gas stream containing sulfur oxides so that, in the filter cake which is built up upon the candle filters, the sorption reaction can continue as the hot gas stream passes through the filter.

Abstract: The present invention is directed to a process for strengthening and sealing geological formations which are moist or contain water, in particular loose stone, by the injection of a mixture which reacts to form polyurethane, characterized in that a polyisocyanate component is injected before injection of the reaction mixture.

Abstract: A coke quenching car comprises an open coke receptacle having a sloping bottom wall inclined toward one side, closely spaced vertical internal walls, a vertical side wall opposite the one side and end walls. All of the walls are formed with cooling fluid passages. The vertical side wall includes a coke discharge opening closed by a swingable L-shaped flap having a leg portion with a cooling fluid passage and a foot portion underhanging the bottom wall in a closed position. The foot portion is provided with aperatures for draining quench water from the receptacle when the flap is swung into a drain position. A fluid cooled slidable cover for the receptacle is provided.