Abstract: A process for producing an alkanesulfonic acid is described, which comprises causing sulfur dioxide and oxygen to act on a saturated hydrocarbon under illumination with light in a substantially water-free reaction system, wherein photo-sulfoxidation of the saturated hydrocarbon is performed as a reaction mixture in the reaction system is held in contact with sodium sulfite.

Abstract: Consolidated waste catalyst is discharged from a reactor by forming at least one hole in it, then filling the hole with hydrative expansive fracturing agent in the presence of water, waiting until fracturing occurs and then discharging the fractured catalyst from the reactor.

Abstract: An Al-killed cold-rolled steel sheet with excellent demagnetization characteristics is provided which is substantially consisted of 0.005% or less C; from 0.05 to 0.50% Mn; 0.010% or less S; from 0.01 to 0.08% Sol.Al; 0.0050% or less N; wherein Mn %/S %.gtoreq.7 and (Sol.Al % - 0.003%)/N %.gtoreq.6; and the remainder iron and inevitable impurities. A shadow mask made of such Al-killed cold-rolled steel sheet and a color television receiver using the same exhibit a very excellent function. A preferred process for producing such an Al-killed cold-rolled steel is also provided, said process being characterized in first obtaining a steel or a specific composition by the use of a vacuum degassing apparatus and then subjecting the steel to sequential steps of hot rolling, cold rolling, decarburization-annealing, and cold rolling.

Abstract: There is disclosed an excellently corrosion-resistant copper alloy suited for use in fabricating fins for heat exchangers, particularly for automobile radiators, which is substantially consisted of 0.005 to 0.1 wt % Pb and 0.01 to 1.0 wt % Co and the remainder Cu with or without the addition of 0.01 to 1.0 wt % one or more of Al, Sn, Mg, Ni, Te, In, Cd, As, Mn, Cr, Ti, Si, Zn, Be, Fe and P.

Abstract: A method of manufacturing a rolled titanium alloy sheet comprises breaking down an .alpha. or .alpha.+.beta. titanium alloy ingot into a slab, working the slab in sequential stages of(A) cross rolling the slab in the .alpha.+.beta. region under a condition of a reduction ratio of at least 1.2 and a cross rolling ratio of 0.6 to 1.4,(B) annealing the workpiece for recrystallization at a temperature 20.degree. to 100.degree. C., preferably 20.degree. to 70.degree. C., below the .beta.-transus of the alloy, and(C) further cross rolling it in the .alpha.+.beta. region under a condition of a reduction ratio of at least 1.6 and a cross rolling ratio of 0.6 to 1.4,and thereafter heat treating the rolled workpiece for annealing, solution treatment and aging or the like, depending on the intended use of the product. The method may include an additional stage (D) of repeating stages (B) and (C) at least once each. The ingot breakdown is preferably carried out by forging or rolling at a temperature of the two-phase .

Abstract: A method of production of a cladding tube for a nuclear fuel element wherein a first hollow billet of a zirconium alloy and a second hollow billet of zirconium having a smaller outer diameter than the first hollow billet are formed by heat treatment, forging and cutting. A resilient member is inserted in a space defined between the first hollow billet and the second hollow billet inserted in the first hollow billet, a pressure oriented axially of the two hollow billets is applied to the resilient member to bring the outer wall surface of the second hollow billet into intimate contact with the inner wall surface of the first hollow billet, and opposite ends of the two hollow billets are joined and sealed. The hollow billets thus joined into a unitary structure are subjected to hot extrusion, cold working and heat treatment to produce a composite tube of reduced diameter and reduced thickness, and the inner and outer wall surfaces of the composite tube are ground.

Abstract: An electrical insulating oil, comprising:a base oil selected from the group consisting of a mineral oil, an alkylbenzene, and a mixture of a mineral oil and an alkylbenzene;a non-basic nitrogen content in an amount of 16 ppm or more; anda basic nitrogen content in an amount of 6% or less based on the weight of the non-basic nitrogen content.

Abstract: A lubricating oil for diesel engines is disclosed. This oil is based on a mixture of lubricating mineral base oil and a highly aromatic light base oil, and is highly effective in reducing the wear of the diesel engine designed to run with heavy fuels having high carbon to hydrogen ratios. The oil is also advantageous in that it does not clog the lubricant filter.

Abstract: Disclosed herein is a process for the selective removal of bismuth and/or antimony from an aqueous sulfuric acid solution containing dissolved bismuth and/or antimony mixed with other metals, such as an electrolyte formed in the electrolytic purification of metals, by which process bismuth and/or antimony are selectively removed from the above sulfuric acid solution by bringing said solution into contact with a phosphomethylamino chelate resin.

Abstract: A process for improving the wear resistance and enhancing the black color of a black rhodium plated article which comprises subjecting the article to anodic electrolysis.

Abstract: A process for producing arsenous acid is disclosed. The reactants include an organic solvent containing 5 valent arsenic, a reducing agent and an additional component selected from the group consisting of water and an aqueous solution. The organic solvent containing 5 valent arsenic contacts and reacts with the reducing agent in the presence of the water or aqueous solution in order to directly produce arsenous acid from the organic solvent containing 5 valent arsenic. The process is a simple and economical process for producing arsenous acid.

Abstract: An anode for copper electrolysis is given improved dissolving activity and enhanced ability to curb the phenomenon of passivation by a cooling treatment which is carried out at a cooling speed of from 20.degree. C./hour to 400.degree. C./hour to at least 400.degree. C., preferably to 200.degree. C.

Abstract: The present invention is concerned with a method of making material for shadow masks to be incorporated in cathode ray tubes for colour TV sets.A coil of cold rolled low carbon Al-killed steel is forcibly decarburized through an open coil annealing until a quench aging index QAI becomes 3.0Kg/mm.sup.2. This QAI is specified as follows: ##EQU1## wherein, W1: load (Kg) giving 10% tensile strain to the said decarburized material having been soaked at temperature of 500.degree. C. for 10 minutes and subjected to a water coolingS: cross sectional area (mm.sup.2) of a test piece when giving said 10% tensile strainW2: yield point load (Kg) provided by the strain effected material aged at temperature of 100.degree. C. for 4 hours.After the forcible decarburization, the steel is subjected to an ordinary re-cold rolling, photo-etching, final annealing and pressing.

Abstract: A lubricant composition that exhibits high wear resistance in a Flon atmosphere is disclosed. The composition comprises mineral oil, alkylbenzene, or a mixture of mineral oil and alkylbenzene as a base oil and it has added thereto an organic sulfur compound in an amount greater than a certain value.

Abstract: A rhodium-plated article with black or blue color is obtained through electroplating by using a plating bath comprising a conventional acid rhodium bath and an additive consisting of organocarboxylic acid, aromatic sulfonic acid or salts of these, amine, gelatin, butynediol, hypophosphite or a mixture thereof.

Abstract: A mechanical punching apparatus for punching tuyeres in which the position of punching rods is varied in a one action in correspondence to movement of the tuyere and in which the mechanical puncher, a carriage and a puncher tilting device are readily accessible for overhaul and maintenance. A mechanical puncher including punching rods assemblies is mounted on a carriage which moves on rails along the longitudinal direction of a converter. A link structure is arranged between the puncher and the carriage for tilting and moving the puncher with the movement being restricted along a predetermined locus having a center at the center of rotation of the converter. The link includes first and second sets of levers disposed between the carriage and puncher with a coupling rod pivotally coupled between levers.

Abstract: A plasma reactor is developed on the fact that a high frequency plasma flame is larger in volume and lower in velocity and therefore a reaction material can stay therein for a relatively long period of time. The plasma reactor has a d.c. arc plasma torch provided in the upper part of the pipe which is an electrically insulative pipe high in heat-resistance and corrosion-resistance or is made up of electrically conductive components which are so designed as to prevent magnetic induction, a reaction material continuously introducing pipe opened in the vicinity of the arc plasma jet from the torch, and a high frequency coil wound around the firstly mentioned pipe coaxially with the torch.

Abstract: A centrifugal separator comprises a centrifugation chamber, gas inlet ports for introducing a gas into the centrifugation chamber so as to whirl the gas, a clean gas discharge pipe provided on the upper portion of the centrifugation chamber, and a guide member secured to the lower portion of the centrifugation chamber. The guide member has an annular groove, outer fine holes made in the groove, a guide portion projecting conically inward the centrifugation chamber, and an inner hole made in the center of the guide portion. A gas including particles is introduced into the centrifugation chamber, in which the particles are separated. The separated particles are trapped in the groove with gas, then discharged from the outer holes. The clean gas removed of the particles is guided by the guide member to direct to the gas discharge pipe, at the same time the particles with gas toward the guide member also are guided by the guide member to be subjected to the centrifugal force.

Abstract: Disclosed in this invention is a process for producing a long-chain dicarboxylic acid by culturing a fungus belonging to Candida tropicalis which has the ability to produce a long-chain dicarboxylic acid in a liquid medium containing a straight-chain saturated hydrocarbon as substrate, the production of said dicarboxylic acid being phenomenally increased by properly adjusting the pH of the medium in the course of culture. There is also disclosed a method for advantageously separating and collecting said dicarboxylic acid from a fermentation broth containing said dicarboxylic acid produced by said culture.

Abstract: Al killed cold rolled sheet is manufactured. The sheet is composed ofC: less than 0.01%, Mn: 0.10-1.00%, S: less than 0.025%, Sol.Al: 0.010-0.120%, N: less than 100 ppm, balance being Fe and impurities.The above N and Sol. Al are in relation of Sol.Al/N.times.14/27.gtoreq.1.5 and most of the N is further fixed as AlN. The Al killed cold rolled sheet is re-rolled to a thickness below 0.2 mm and bored by photo-etching. Then the sheet is finally annealed in a decarburizing atmosphere at temperatures in the range of 650-850.degree. C. for 1-30 minutes, preferably 1-10 minutes. Subsequently the sheet is subjected to a leveling process and press forming to form a shadow mask for color TV.