Abstract: A method for decomposing nitrogen fluoride or sulfur fluoride, comprising contacting gaseous nitrogen fluoride or sulfur fluoride with a solid reagent comprising elemental carbon, one or more of the alkaline earth metal elements and optionally one or more of the alkali metal elements, to fix the fluorine component in the nitrogen fluoride or sulfur fluoride in said reagent.

Abstract: Fluorocarbons including perfluorocarbons and hydrofluorocarbons are highly efficiently decomposed by contacting a gaseous fluorocarbon with a reagent comprising carbon and an alkaline earth metal or carbon, an alkaline earth metal and an alkali metal at an elevated temperature, the decomposed halogen being fixed to the reagent.

Abstract: Ejection material in powder form used in mechanical plating, each particle of the ejection material being made of an iron alloy core covered with a zinc alloy layer and conducted with thermal treatment at a temperature between 300.degree. and 700.degree. C. so that the zinc alloy layer has the Vicker's hardness of 60 to 370.

Abstract: After optional preliminary treatment, solid wastes are processed in accordance with the flowsheet FIG. 1: first, Cu is leached selectively with a leaching solution containing Cu(II) ammine as a leachant according to the autooxidation or the autocatalytic action which proceeds depending on the equations: ##STR1## and the Cu(II) ammine concentrated in the leaching solution is extracted with a solvent Lix-54; thereafter, Cu.sup.2+ is stripped so that it moves into a Cu electrolyte and Cu electrowinning is performed to have metallic Cu deposited at the cathode, with the total process being carried out in a closed circuit. By this process, copper and other nonferrous metals can be selectively recovered from motor scrap and shredded solid wastes such as abandoned automobiles and home electric appliances in a simple and economical manner.

Abstract: Mechanical plating method for forming a zinc alloy film by ejecting powder onto a surface. Ejection powder is made by mixing iron or iron alloy nuclei with zinc alloy melt, cooling to form a solidified alloy, and crushing. The ejection powder is then heat treated between 300.degree. C. and 700.degree. C. to adjust the Vicker's hardness of the zinc alloy to between 60 and 370.

Abstract: The pyrogen of the invention is formed by the compression of ferrosilicon powder and a mixture of ferric oxide powder and another lower order iron oxide powder. This pyrogen overcomes the weaknesses inherent in earlier pyrogens by dispensing with the use of peroxides. The scope of the invention also extends to the canister which holds the pyrogen. The pyrogen, which is positioned inside the canister's combustion chamber in such a way that it comes into contact with the top of said combustion chamber, is supported by a special ceramic thermal insulator which contains an ignition device comprising an ignition agent, which also incorporates an instant high temperature generating ignition material, and a match head chemical which projects out of a hole in the base cover of the canister. The bottom of the canister is covered by a bottom cap which can be freely removed or replaced as required. The canister, which enables the heating or cooking of whatever is placed inside it, is compact, safe and cheap.

Abstract: The pyrogen of the invention is formed by the compression of ferrosilicon powder and a mixture of ferric oxide powder and another lower order iron oxide powder. This pyrogen overcomes the weaknesses inherent in earlier pyrogens by dispensing with the use of peroxides. The scope of the invention also extends to the canister which holds the pyrogen. The pyrogen, which is positioned inside the canister's combustion chamber in such a way that it comes into contact with the top of said combustion chamber, is supported by a special ceramic thermal insulator which contains an ignition device comprising an ignition agent, which also incorporates an instant high temperature generating ignition material, and a match head chemical which projects out of a hole in the base cover of the canister. The bottom of the canister is covered by a bottom cap which can be freely removed or replaced as required. The canister, which enables the heating or cooking of whatever is placed inside it, is compact, safe and cheap.

Abstract: A blast material for the mechanical plating and a continuous mechanical plating process. The blast material comprises up to 90% by weight of steel shot not less than 10% by weight of an alloy powder which comprises 2.5-50% by weight of iron, not more than 5% by weight of at least one of aluminum, copper, tin, magnesium and silicon, the balance being zinc, and has a maximum particle size of about 0.4 mm and an average hardness of 140-450 Hv., The continuous mechanical process comprises continuing blasting, recycling the used blast material and magnetically separating the abraded fine particles of the steel shot in the course of the recycling.

Abstract: A blast material for mechanical plating and a continuous mechanical plating process. The blast material comprises 60-90% by weight of steel shot and 10-40% by weight of a coating powder which is an alloy comprising 2.5-50% by weight of iron, not more than 5% by weight of aluminum, copper, tin, magnesium and silicon or a combination thereof and the balance being zinc. The powder has a maximum particle size of about 0.4 mm and an average hardness of 140-450 Hv. The continuous mechanical process comprises continuously blasting the blast material onto a metal part, recycling the used blast material and magnetically separating abraded fine particles of the steel shot in the course of the recycling.