Abstract: In a method and apparatus for processing materials comprising ashes from waste incineration plants and mineral residues to condition them in a short time by washing them and by subjecting them to electrodynamic processes and shock waves generated by high voltage spark discharges, the material is made chemically inert and aged so that it can be used immediately after treatment without harming the environment.

Abstract: Mesoporous metal carbonate structures are formed by providing a solution containing a non-ionic surfactant and a calcium acetate salt, adding sufficient base to react with the acidic byproducts to be formed by the addition of carbon dioxide, and adding carbon dioxide, thereby forming a mesoporous metal carbonate structure containing the metal from said metal salt.

Abstract: Bleaching a particulate calcium carbonate aqueous slurry with a reductive bleaching agent such as formamidine sulfinic acid increases the viscosity of the slurry. Combining the slurry with a metal material such as strontium hydroxide reduces any increase in viscosity of the bleached calcium carbonate slurry. Addition of the reductive bleaching agent and/or the metal material takes place prior to, during or after the manufacture of the slurry or the bleaching step. Metal materials in one embodiment include those that form substantially water insoluble precipitates of the reductive bleaching reaction products.

Abstract: Disclosed is a novel form of particulate precipitated aragonite, and a novel process for producing it.

Abstract: A method of producing a zinc-ammonia-carbonate complex solution includes heating a solution made from urea with added zinc from a zinc source in a first vessel to produce zinc and impurities dissolved in the solution and a residual; cementing the solution by adding zinc dust to form a slurry; filtering the slurry to remove a first precipitate and to produce a first filtrate; optionally heating the first filtrate to form a second precipitate in the first filtrate; and filtering the first filtrate to remove the second precipitate and to produce a second filtrate which comprises the zinc-ammonia-carbonate complex solution.

Abstract: A method for preparing basic zinc carbonate from die casting ash, zinc skimming or zinc ash includes heating urea or a mixture of urea and ammonia and carbon dioxide with water in a closed vessel with zinc ash. After zinc is dissolved in sufficient quantities, the solution is cooled and filtered. The filtered solution is cemented with zinc dust to precipitate heavy metals and the filtered. The solution is preferably heated a second time to remove an iron precipitate. The solution is then heated a third time to precipitate the dissolved zinc as basic zinc carbonate, which is washed and dried. The filtrate and gases recovered from the heating steps are reused in the process.

Abstract: An organic solvent is separated from a waste stream comprising supercritical CO2, an organic solvent and etchant contaminants.

Abstract: A method for preparing basic zinc carbonate from die casting ash, zinc skimming or zinc ash includes heating urea or a mixture of urea and ammonia and carbon dioxide with water in a closed vessel with zinc ash. After zinc is dissolved in sufficient quantities, the solution is cooled and filtered. The filtered solution is cemented with zinc dust to precipitate heavy metals and the filtered. The solution is preferably heated a second time to remove an iron precipitate. The solution is then heated a third time to precipitate the dissolved zinc as basic zinc carbonate, which is washed and dried. The filtrate and gases recovered from the heating steps are reused in the process.

Abstract: A treating method and apparatus for treating a manganese containing water by crystalizing and removing a soluble manganese in a water to be treated containing carbonic acid ions by passing the water to be treated as an upward flow through a fluidized bed reaction tower having no support bed and containing manganese sand as a fluidized bed material and by adjusting a pH value of the water to be treated in said fluidized bed. A suspended manganese is also removed together with said soluble manganese in the water to be treated by forming a suspended solid in the water to be treated into a layer on said manganese sand fluidized bed by removing said layer of suspended solid. Further, a desired quantity of the treated water is introduced into the water to be treated for circulatory use.

Abstract: A process for the production of powders by precipitation from a liquid reaction mixture comprises passing along a tubular reactor a segmented reaction flow comprised of discrete volumes of the reaction mixture separated by discrete volumes of a separating fluid which is substantially immiscible with said reaction mixture, the residence time of said discrete volumes of reaction mixture in the reactor being sufficient for the precipitation reaction to be effected.

Abstract: Novel, fine particulate synthetic chalcoalumite, process for preparation thereof, and a heat insulating agent and agricultural film containing said fine, particulate synthetic chalcoalumite. The above objects are met by synthetic chalcoalumite represented by formula (1) below: (M12+)a−x(M22+)Al3+4(OH)b(An−)c. mH2O  (1)  (in which M12+ stands for Zn2+ or Cu2+,  M22+ is at least one divalent metal ion selected from Ni2+, Co2+, Cu2+, Zn2+ and Mg2+,  a is 0.3<a<2.0 (with the proviso that M1 and M2 are not the same),  x is 0 ≦x<1.0, and x<a  b is 10<b<14,  An− is at least one selected from SO42−, HPO42−, CO32−, SO32−, HPO32−, NO3−, H2PO4−, Cl−, OH− and silicate ion,  c is 0.4<c<2.

Abstract: The invention provides a process for production of fine spherical particles of a carbonate or a hydroxide of nickel, cobalt or copper which comprises: dissolving a carbonate or a hydroxide of nickel, cobalt or copper having the general formula (I) M(CO3)x/2.(OH)y wherein M represents Ni, Co or Cu, and x and y are numerals satisfying the followings: 0≦x≦2, 0≦y≦2 and x+y=2, in aqueous ammonia, converting the resulting solution to a W/O emulsion containing droplets of the solution in a non-aqueous medium, and then removing volatile components including ammonia from within the droplets, thereby precipitating a basic carbonate or a hydroxide of a metal selected from nickel, cobalt and copperin the droplets.

Abstract: Method of recovering calcium carbonate from waste material or contained natural calcic material. Calcium is recovered by prepariag an aqueous suspension the material containing calcium to be recovered and by lowering the pH of the suspension to pH<6, preferably pH<4, for providing a spension including an acidic liquid phase containing the calcium compounds in soluble form. Thereafter the pH of the liquid is raised to pH>6, preferably pH>7, by mixing a base therein, for precipitating the main portion of aluminium therein. Thereafter the neutral or basic liquid phase is carbonized by introducing Na2CO3 or NaHCO3 therein, for precipitation of the calcium compounds as CaCO3.

Abstract: The present invention relates to processes for the production of cobalt(II) carbonates corresponding to the general formula Co[(OH)2]a[CO3]1−a, cobalt(II) carbonates and cobalt(II) oxalate carbonates obtainable by the process and the use thereof.