Abstract: A cuprous oxide powder is produced by the steps of discharging a molten copper, which is kept at a temperature at or higher than the melting point and at or lower than 1450.degree. C. and contained in a container having a nozzle at a bottom, from the nozzle into a reactor vessel disposed below the container to form a downward flow of the molten copper, atomizing the downward flow by a jet stream of an oxygen-contained gas and, thereby simultaneously, oxidizing the molten copper to form cuprous oxide, cooling liquid droplets or solid particles of the thus formed cuprous oxide and then collecting the droplets or particles from the reactor vessel. A cuprous oxide powder can be produced, without requiring a large-scale production facility, in simple steps, and efficiently and continuously.

Abstract: Methods of manufacturing a composite ferrite of two or more of metal oxides prepared from a chloride solution containing ions of these metals, one of the metals being zinc. The methods comprise (a) ejecting a high temperature gas to the solution or atomizing the solution and (b) supplying the atomized gas to a combustion gas containing oxygen, to evaporate moisture from mist particles of the solution in a short period of time so that the zinc chloride in the solution is not substantially evaporated and to induce a heat decomposition or chemical reaction for the remaining metal salt particles, thereby forming a composite ferrite.

Abstract: A method for manufacturing a titanium powder, which comprises the steps of: causing a molten reducing agent comprising molten magnesium at a temperature of 650.degree. to 900.degree. C. or molten sodium at a temperature of 100.degree. to 900.degree. C. to fall into a reaction vessel; ejecting a titanium tetrachloride gas at a temperature of 650.degree. to 900.degree. C. toward the falling flow of the molten reducing agent in the reaction vessel to atomize the molten reducing agent, and producing titanium particles containing molten reaction product which comprises molten magnesium chloride or molten sodium chloride, through a reducing reaction between the atomized molten reducing agent and the titanium tetrachloride gas; and removing the reaction product from the titanium particles containing the reaction product to manufacture a titanium powder.

Abstract: A fragrant fibrous structure, such as fabrics, apparels or the like, provided with microcapsules encapsulating a perfume and a resinous binder, preferably a silicone resin, in a weight ratio of 2/1 to 1/5, an add-on amount in the aggregate of said microcapsules and resinous binder being 0.3.about.7.0% based on the weight of the portion to which said microcapsules and resinous binder are adhered, of the fibrous structure. The process for preparing the above fibrous structures comprises applying a treating liquid comprising microcapsules composed of an external wall of a formaldehyde based resin enclosing a perfume and a resinous binder, preferably a low temperature reactive organopolysiloxane prepolymer emulsion, preferably together with a pressure absorbing agent, to at least a part of a fibrous structure and then drying the fibrous structure at a temperature of less than 150.degree. C. to fix said microcapsules on fiber surfaces of the fibrous structure.

Abstract: A fragrant fibrous structure, such as fabrics, apparels or the like, provided with microcapsules encapsulating a perfume and a resinous binder, preferably a silicone resin in a weight ratio of 2/1 to 1/5, an add-on amount in the aggregate of said microcapsules and resinous binder being 0.3.about.7.0% based on the weight of the portion to which said microcapsules and resinous binder are adhered, of the fibrous structure. The process for preparing the above fibrous structures comprises applying a treating liquid comprising microcapsules composed of an external wall of a formaldehyde based resin enclosing a perfume and a resinous binder, preferably a low temperature reactive organopolysiloxane prepolymer emulsion, preferably together with a pressure absorbing agent, to at least a part of a fibrous structure and then drying the fibrous structure at a temperature of less than 150.degree. C. to fix said microcapsules on fiber surfaces of the fibrous structure.

Abstract: An aqueous solution containing ions of one or more chalcophile elements is used as a catholyte and electrolyzed in the presence of elemental sulfur powder suspended therein to precipitate the chalcophile elements in the form of sulfide. The precipitated sulfide is then separated from the aqueous layer.

Abstract: A method for winning lead from a powdery material consisting of a lead sulfide concentrate or a powdery material containing lead sulfide by passing an electric current across the anode and the cathode of an electrolytic cell partitioned into an anode compartment and a cathode compartment by a diaphragm; which comprises filling the anode compartment with a suspension of the aforesaid powdery material in an aqueous solution of a water-soluble chloride, electrolytically forming the crystalline particles of lead chloride by the anodic oxidation of the suspended particles, separating and refining the crystalline particles of lead chloride from the aqueous solution of the water-soluble chloride, and filling the cathode compartment with a solution of the separated and refined crystalline particles of lead chloride dissolved in an aqueous solution of a water-soluble chloride thereby to deposit lead electrically on the cathode.

Abstract: An improved electrolytic cell for use in the continuous hydroelectrometallurgical production of a metal by the electrolytic deposition of the metal on the surface of suspended seed particles of pure metal comprising a vertical cylindrical cell comprising an upper anode zone including a horizontal anode and a lower cathode zone including a horizontal network cathode, said network cathode partitioning the cathode zone into an upper and a lower part, and a stirrer positioned below said network cathode. Thus, the seed particles are maintained in a stable state of suspension in the electrolyte in the upper part of the cathode zone, where they are electronegatively charged by their collision with the network cathode, with the consequence that the electrolysis is carried out with extreme effectiveness.

Abstract: A method for electrochemically refining copper, which comprises placing a catholyte solution consisting of a copper ion aqueous solution and an anolyte solution consisting of an aqueous dispersion of particles of matte, white metal or blister copper or particles of ferrous hydroxide in an electrolyte in a cathode compartment and the anode compartment, respectively of a galvanic cell partitioned into the cathode compartment and the anode compartment by a diaphragm; and short-circuiting a cathode dipped in the catholytic solution and an anode dipped in the anolyte solution by means of a conductor while maintaining the pH of the catholyte solution at -1 to 5 and the pH of the anolyte solution at 8 to 14, thereby to precipitate pure copper on the cathode.

Abstract: In the method of smelting copper by melting a starting material of the group consisting of copper ore and roasted copper ore in a furnace along with a flux, separating from the melt a material of the group consisting of a matte and white metal which abound in cuprous sulfide, and thereafter smelting the separated matte or white metal with a member selected from the group consisting of oxygen and a oxygen-containing gas to convert same into blister copper, the improvement which comprises causing said matte or white metal to freely flow downwardly in a molten state and blowing a member selected from the group consisting of air, oxygen-enriched air and oxygen against the downwardly flowing stream of matte or white metal thereby dividing said stream of matte or white metal into fine particles as well as oxidatively smelting the matte or white metal to convert same into blister copper.