Abstract: The present invention relates to an apparatus and a method for evaporating liquids containing potentially explosive impurities of lower volatility than the actual liquid compound. The set-up of the evaporator according to the invention allows its operation with complete evaporation of a liquid without formation of a liquid sump of not yet evaporated liquid.

Abstract: The present invention relates to an apparatus and a method for evaporating liquids containing potentially explosive impurities of lower volatility than the actual liquid compound. The set-up of the evaporator according to the invention allows its operation with complete evaporation of a liquid without formation of a liquid sump of not yet evaporated liquid.

Abstract: Hydroxypivalic acid is obtained from aqueous solutions by removal of the water by azeotropic distillation and subsequent crystallization from a solvent mixture which is composed of a polar and a non-polar component. The distillation is carried out under reduced pressure and at a maximum bottom temperature of 90.degree. C., until a residual water content of at least 0.1% of the total weight of the resulting solution is achieved.

Abstract: Hydroxypivalic acid can be prepared by oxidation of hydroxypivalaldehyde with hydrogen peroxide by metering the hydrogen peroxide, as the oxidizing agent, into an aqueous hydroxypivalaldehyde reservoir in the temperature range from 60.degree. to 80.degree. C. such that a hydrogen peroxide concentration of 4% by weight, based on the total weight of the reaction mixture, is not exceeded, and ending the addition of hydrogen peroxide as soon as the concentration of hydroxypivalaldehyde in the reaction mixture falls below 1% by weight.

Abstract: A process for the selective concentration of uranium from sea water through chemical accumulation onto a solid adsorption medium, which does not necessitate any H.sup.+ ions for regeneration, in particular onto titanium oxide hydrate and subsequent elution with a carbonate-containing eluent.

Abstract: Exchange-discharge bodies provided with reactive material, especially for ace-material concentration from large water masses. The exchange bodies comprise a mechanically stable outer contour, and have a fluid accessible reactive upper surface protected against mechanical access by adjacent bodies.

Abstract: Method of and apparatus for concentration of trace material from large voes of water. Carrier bodies having a lower density than that of water are introduced into a water layer, especially a natural sea current or stream; these carrier bodies are collected again after an automatic traversal of the sea flow or water layer under conditions determined by density differing from that of water. The carrier bodies are loaded and charged by depositing or accumulation of trace material, e.g. uranium concentration, on the carrier bodies. The carrier bodies are then conveyed to a further treatment location for isolating the accumulated and concentrated trace material. The carrier bodies are then again discharged into the flow or stream after being depleted.

Abstract: A method and apparatus for recovering raw material, especially uranium, f natural waters, especially from the sea. Carrier bodies capable of sinking are permitted to pass, in a free fall, through a layer of water, especially a natural sea current or stream, by concentration on the carrier bodies, which are collected at an appropriate depth and are then conveyed from there for further treatment. Carrier bodies of inert material are used having a protected outer surface with a thin layer, capable of being concentrated, coated thereon. The distance of falling amounts to approximately 100 meters. The apparatus for carrying out the method includes a carrier body discharge located below water level. One end of a carrier body path has a collection device for collecting carrier bodies and is directed toward the conveyor path. The apparatus also has a conveying device operating especially hydraulically according to the principle of communicating pipes.

Abstract: A supporting web of synthetic fibers in which a permanently magnetic powder s embedded is used to hold fine magnetic particles in a matrix for interaction with dissolved or dispersed substances present in a liquid or gas flowing through the matrix. The magnetic force in the supporting web produced by the embedded powder lends flow resistance to the adhering particle matrix making it possible to use smaller particles effectively. Catalytic effects can be produced if the magnetic particles are coated with a nonmagnetic material having a catalytic effect for the dissolved or suspended substance, as the costing does not interfere with the tenacity of the magnetically supported matrix. A matrix with particles of a ferrimagnetic compound are useful for removal of metal ions and metal complex ions from water solution as for example uranium.

Abstract: A method for recovering uranium ions from sea water utilizing an adsorbent atrix. The materials contained in the matrix comprise biologically recent humic acids. Matter which serves as carrier material for the humic acids is present in the dry state up to 99% by weight.

Abstract: A supporting web of synthetic fibers in which a permanently magnetic powder s embedded is used to hold fine magnetic particles in a matrix for interaction with dissolved or dispersed substances present in a liquid or gas flowing through the matrix. The magnetic force in the supporting web produced by the embedded powder lends flow resistance to the adhering particle matrix making it possible to use smaller particles effectively. Catalytic effects can be produced if the magnetic particles are coated with a nonmagnetic material having a catalytic effect for the dissolved or suspended substance, as the coating does not interfere with the tenacity of the magnetically supported matrix. A matrix with particles of a ferrimagnetic compound are useful for removal of metal ions and metal complex ions from water solution as for example uranium.