Abstract: Particular copper base alloys consisting essentially of silicon, tin and mischmetal are disclosed which exhibit improved resistance to edge cracking during hot working operations. Various other elements such as chromium, manganese, iron and nickel may also be added to the alloy to increase the strength properties of the alloy without affecting the hot workability improvement brought about by the mischmetal addition to the copper-silicon-tin base.

Abstract: The improved high temperature softening resistance of Alloy 688 and modified 688 is obtained by the addition of niobium to the alloys. These particular alloy systems not only exhibit resistance to high temperature softening, but also exhibit improved stress corrosion and stress relaxation resistance properties. All of these properties are attained without any loss in the high strength properties of the base alloy systems.

Abstract: The improved machinability of standard Alloy 688 and modified 688 is achieved through the addition of lead to the alloy. This machinability improvement in Alloy 688 is not achieved at the detriment of the well-known strength of Alloy 688.

Abstract: An improved method and apparatus for supporting the shaving tool in an adjustable tool holder for use in the production of multiple gauge strip is disclosed wherein the adjustable tool holder is vertically positioned on gauge blocks and thereby rigidly supported against the strip to be shaved by applying a vertical load on the adjustable tool holder.

Abstract: An improved method and apparatus for the production of multiple gauge metal strip is disclosed wherein the metal strip is drawn over an arced surface under a shaving tool apparatus whereby the arced surface provides effective hold-down of the metal strip thereby allowing a greater volume removal of material per pass. The present invention contemplates an improved apparatus for holding the shaving tool's position with respect to the arced surface and the strip.

Abstract: A process for producing ammonium phosphate that is substantially free of arsenic which comprises:(a) reacting crude phosphoric acid containing dissolved arsenic having a +5 valence state with ammonia and arsenic-reducing agent in sufficient proportions to form an ammonium phosphate solution and to reduce the arsenic from the +5 valence state;(b) forming ammonium phosphate crystals from said solution, leaving a mother liquor that contains substantially all of said arsenic; and(c) recovering said ammonium phosphate crystals that are substantially free of arsenic from said mother liquor.

Abstract: An improvement in the generation of foam from a mixture of foam-forming material in a structure having a preferred configuration. Conveying means are used to convey the structure along a horizontal path. A plurality of foam gun heads are mounted in spaced relationship to each other over and transverse to said horizontal path. Each foam gun head includes a foam dispensing outlet and valve means for controlling the discharges of the foam-forming materials therefrom. First, sensing means are provided upstream of the foam dispensing outlets for sensing the passage of the structure thereby. A plurality of second sensing means are positioned upstream of the foam dispensing outlets in spaced relationship to each other in a direction transverse to the horizontal path, each one of the second sensing means being associated with one foam gun head for sensing the presence of the structure in a vertical direction.

Abstract: A process for preparing hypochlorous acid in a sweep reactor is described in which gaseous chlorine is passed rapidly across the surface of an agitated aqueous solution of alkali metal hydroxide at a reduced temperature. The resulting gaseous product mixture of hypochlorous acid, chlorine monoxide, and unreacted chlorine is conveyed from the reactor to a suitable scrubber to produce an aqueous hypochlorous acid solution.The aqueous reaction product of the sweep reactor is a suspension of alkali metal chloride in alkali metal hypochlorite, which is withdrawn and filtered to separate the solid. The clarified aqueous solution of alkali metal hypochlorite is reacted with the aqueous hypochlorous acid solution from the scrubber, chlorine and lime to form an aqueous slurry of calcium hypochlorite. This slurry may be granulated by the spray graining technique, for example, to produce strong rounded granules of calcium hypochlorite.

Abstract: A connector assembly for use in attaching a lanyard pull wire to the trigger of a powder-actuated tool which is mounted on a pole for overhead use. A tubular member, preferably a spring, receives a wire loop through its bore. The member slips onto the tool trigger, and the lanyard is connected to the wire loop. The connector assembly is thus easily removable and does not require extra tool modification to use.

Abstract: An improvement is disclosed in the preparation of pentachloronitrobenzene by the nitration of pentachlorobenzene. The improvement, which is primarily aimed at reducing the residual level of the undesirable starting material, pentachlorobenzene, in the product, includes a two-stage reactant mixing step wherein the pentachlorobenzene is first mixed with sulfuric acid and then concentrated nitric acid is added to this mixture.

Abstract: Described is a process for making rigid polyurethane foam from a reaction formulation including a novel surfactant composition comprising select trialkoxysilanols or alkoxysilane cluster compounds.

Abstract: A process for preparing hypochlorous acid is described in which gaseous chlorine is reacted with an aqueous solution of alkali metal hydroxide in a finely divided mist form at an elevated temperature sufficient to prevent condensation of the gaseous product. Gaseous hypochlorous acid product is immediately separated from the resulting solid alkali metal chloride as it is formed and is then scrubbed with water to form an aqueous hypochlorous acid solution. This solution may be reacted with lime to produce calcium hypochlorite.

Abstract: A process for reducing the radioactive contamination in waste product gypsum in which waste product gypsum is reacted with a dilute sulfuric acid containing barium sulfate to form an acid slurry at an elevated temperature, the slurry is preferably cooled, the acid component is separated from the solid, and the resulting solid is separated into a fine fraction and a coarse fraction. The fine fraction predominates in barium sulfate and radioactive contamination. The coarse fraction predominates in a purified gypsum product of reduced radioactive contamination.

Abstract: A process is described in which granular calcium hypochlorite particles are encapsulated with at least one layer of a hydrated low melting inorganic salt. In this process granular calcium hypochlorite particles are lifted from a moving bed to the upper part of a distribution zone and the lifted particles are released to fall downwardly through the upper portion to the moving bed. A molten hydrated low melting inorganic salt is sprayed onto the falling particles above the moving bed, and the coated particles are cooled to provide at least one solid outer layer of said low melting hydrated inorganic salt.

Abstract: Alkali metal dichloroisocyanurate compositions having improved resistance to thermal decomposition comprise an alkali metal dichloroisocyanurate and a proportion of an alkali metal chloride where the proportion is from about 6 to about 14 percent by weight of the alkali metal dichloroisocyanurate. Water may be used to replace part of the alkali metal chloride proportion.The compositions are suitable for use in bleaching and sanitizing applications.

Abstract: A method for recycling regenerated cellulose scrap such as uncoated cellophane and rayon produced in the viscose process. The regenerated cellulose scrap is first shredded into relatively small flakes and then emulsion-xanthated at a temperature ranging from 18.degree. to 30.degree. C. in an aqueous solution of sodium hydroxide and carbon disulfide. The amount of regenerated cellulose scrap added to the solution is controlled to maintain the total cellulose concentration at from 3 to 5% by weight of the solution. At least 38% by weight carbon disulfide based on the weight of the cellulose is used in the solution and the solution is made up to contain from about 10.3 to 11.3% by weight sodium hydroxide based on the weight of the solution so that sufficient sodium hydroxide is present to give about 9.5 to 10.5% by weight in the resulting scrap viscose.

Abstract: An improvement in the generation of foam from a mixture of foam-forming material in a structure having a preferred configuration. Conveying means are used to convey the structure along a horizontal path. A plurality of foam gun heads are mounted in spaced relationship to each other over and transverse to said horizontal path. Each foam gun head includes a foam dispensing outlet and valve means for controlling the discharges of the foam-forming materials therefrom. First, sensing means are provided upstream of the foam dispensing outlets for sensing the passage of the structure thereby. A plurality of second sensing means are positioned upstream of the foam dispensing outlets in spaced relationship to each other in a direction transverse to the horizontal path, each one of the second sensing means being associated with one foam gun head for sensing the presence of the structure in a vertical direction.

Abstract: An improved chemical generation apparatus particularly adapted to the generation of chlorine dioxide. This apparatus includes a generation vessel having at least two reducing couplings attached thereto by leak-proof joints thereby forming at least one inlet and at least one outlet to said vessel. The reducing couplings advantageously have surfaces which form an angle of at least 110.degree. with the vessel walls to create a geometry which prevents chemical buildup during operation of the apparatus. The apparatus also has sources of supply for each of the reactive materials connected to said inlet of the vessel though a metering means and an injection check valve.

Abstract: A process for producing selected 3-trihalomethyl-5-lower alkoxy-1,2,4-thiadiazole compounds by the reaction of N-halotrihaloacetamidines with alkali metal xanthate salts.

Abstract: Graft copolymers of vinyl monomers and unsaturated polyols are described. These copolymers are prepared by the polymerization of an ethylenically unsaturated monomer, or a mixture of such monomers, in a polyol comprising an alkenyl aryl polyol. The alkenyl aryl constituents render the polyols compatible for graft copolymerization with the vinyl monomers. The graft copolymers are useful in polyurethane formulations.