Abstract: A system for burning two fuels in a burner wherein the second fuel is available in varying amounts. In response to the sensing of the available supply of the second fuel and the sensing of the total fuel required to be supplied to the burner, the system proportions the total fuel supplied to the burner between the first and second fuels to use as much of the second fuel as the supply will permit to meet the total fuel requirement. In addition, the system cuts off the supply of the first fuel to the burner when the available supply of the second fuel is adequate to meet the total fuel requirement and turns on the supply of the first fuel when the available supply of the second fuel is not adequate to meet the total fuel requirement.

Abstract: Process for preparing fluoroaromatic or fluoropyridines by diazotization-fluorination of aromatic or heterocyclic amines in a solution of hydrogen fluoride containing selected tertiary amine compounds.

Abstract: An expandable electrode assembly is provided having two opposed working faces of flexible electrically conductive material, said faces defining a riserless open chamber therebetween, a plurality of spring means interposed between the working faces for biasing the faces a limited distance away from each other and for allowing inward movement of the faces toward each other in response to inward force applied to the working faces, and an electrical conductor means affixed to one edge of each of the planar faces to a supportive backplate without limiting the inward movement of the edge of the faces opposite the one edge.

Abstract: Compounds containing an azo-linkage connecting two similar polyol esters constituents are described. These azo di-ester polyols are prepared by the direct esterification of azo diacids with polyols, in the presence of a strong mineral acid catalyst. The azo di-ester polyol products function as free radical initiators and grafting bases in the graft copolymerization of unsaturated monomers with polyols. These graft copolymers are useful in the formulation of polyurethanes.

Abstract: A heat exchange system comprising a plurality of passageways for a heat exchange medium defining opposed header structures connected by connecting portions of said passageways extending therebetween, said connecting portions having entry and exit portions communicating with said headers to provide ingress and egress openings for said heat exchange medium, wherein said connecting portions are provided with at least one constriction in internal diameter extending along at least a portion of the length of at least one of said connecting portions, said constriction serving to regulate the flow of said heat exchange medium between all of said connecting portions.

Abstract: A chamber is formed on a powder-actuated tool into which the combustion gases generated by firing the tool are directed. The chamber contains a plurality of baffle plates which absorb noise and provide increased surface area for precipitation of fouling deposits carried by the combustion gases. The plates are easily removable for cleaning. The chamber is formed in a box-like housing which can be secured to a conventional indirect firing tool with minimal adaptation necessary.

Abstract: A heat-sealable coating composition for organic polymeric films such as regenerated cellulose film that provides good runnability properties of the coated films on automatic packaging machines, comprising a conventional heat-sealable vinylidene chloride copolymer coating composition containing from about 0.4 to 1.5% by weight of an alkali metal salt of lauryl sulfate and from about 0.2 to 1.0% by weight of an alkaline earth metal stearate, alkali metal stearate, or ammonium stearate. In addition, the composition may also contain from 0.4 to 1.0% lecithin. The coating composition provides good packaging machine runnability properties in a single coating on organic polymeric films without impairing heat-sealability, and its appearance in response to high relative humidity exposure can be varied in degrees of antifogging characteristics by adjustment of the sulfate and stearate additive concentrations.

Abstract: Selected amino ethers are disclosed for use as catalysts in the preparation of polyurethane foam.

Abstract: A selective process wherein toluene diisocyanate distillation residue is converted from a viscous liquid into an inert, granular solid by treatment with an aqueous solution of ammonia or an alkaline earth metal hydroxide.

Abstract: Alkali metal salts of dichloroisocyanuric acid are produced by the reaction of a monoalkali metal cyanurate with an alkali metal hypochlorite and chlorine in an aqueous medium while maintaining the pH of the reaction mixture in the range of from about 6.0 to about 7.5 and recovering the solid alkali metal dichloroisocyanurate produced thereby.The products are useful as bleaching or sanitizing agents.

Abstract: A process is described for recovering calcium hypochlorite values from the filter media employed in the filtration of calcium hypochlorite slurries. Deposits of Ca(OCl).sub.2 along with insoluble materials adhering to the filter media are washed with an aqueous solution of calcium hypochlorite to form a slurry of calcium hypochlorite solids. Water is used to wash the filter media to dissolve any remaining Ca(OCl).sub.2 and form a solution of calcium hypochlorite. The slurry and solution are then admixed to provide a solution of calcium hypochlorite whose concentration is controlled within the range of from about 45 to about 215 grams per liter of Ca(OCl).sub.2. This solution is employed in the production of calcium hypochlorite and is recycled to the washing step.

Abstract: Improved roll formation in regenerated cellulose film is obtained by a method for introducing randomized gauge variations in the film on the casting machine by varying the water content in the gel film in scattered areas across the film prior to drying. Those areas of the film containing more moisture before drying tend to be thicker than those areas containing less moisture resulting in gauge variations throughout the film. Since the gauge variations are randomly imparted to the film across its width, they do not pile up on top of one another to form gauge bands when the film is wound into rolls and the effect on roll formation of any gauge bands inherently present in the film from the casting operation are minimized due to the (superimposed) randomly imparted gauge variations. Preferably, the method comprises imparting the random gauge variations in the film by producing diagonal tracks of water on the film with a transversely moving squeegee band containing a plurality of slight indentations.

Abstract: A method for adding reactive elements to molten copper or copper base alloys is disclosed. This method prevents unwanted reactions and oxidation by adding the reactive elements to the molten metal in the form of a powder mixture placed within tubing which is compatible with said molten metal. This filled tubing is sealed and drawn down, if desired, to an appropriate size for rapid melting within said molten metal and consequent rapid dissolution of the reactive elements throughout the molten metal.

Abstract: A process for hydrolyzing urea in waste water streams which comprises introducing a waste water stream containing urea into a carbon dioxide recovery system such as used in connection with the production of ammonia, and therein hydrolyzing substantially all of the urea in the waste water stream.

Abstract: Alkali metal chlorites are produced by the reaction of chlorine dioxide with an alkali metal amalgam in a reaction mixture where the pH is maintained at from about 9.5 to about 11.5 by providing an excess of the alkali metal to the chlorine dioxide of at least 10 mole percent.Alkali metal chlorites obtained by this process are free of insoluble mercury and have reduced concentrations of soluble mercury as a contaminant.

Abstract: Polychloroisocyanurate products are produced in a continuous process which reacts a cyanuric acid component with a chlorinating agent in a reaction mixture to which a purge gas is fed to remove in an effluent gas, any nitrogen trichloride produced along with other by-products. The effluent gas is fed to a gas analyzer such as a gas chromatograph which determines the concentration of NCl.sub.3 present and compares it with a predetermined upper limit. If this upper limit is equalled or exceeded, the gas analyzer activates means to flood the reaction mixture with purge gas to prevent explosive amounts of nitrogen trichloride from being present in the reaction mixture. The gas analyzer may also control the feed rate of the cyanuric acid component and the chlorinating agent.The pH of the reaction mixture is also continuously measured in a pH analyzer having means to control the flow rate of the purge gas and reactants should the predetermined pH limits for the reaction be attained or exceeded.

Abstract: A select semi-rigid polyurethane foam composition is described for use in packaging fragile or shock-sensitive objects. The foam composition is prepared from a very select reaction mixture which is characterized by high levels of water and an organic foaming agent, and a relatively low reaction mixture NCO/OH index of from about 30 to about 60.

Abstract: Novel compositions comprising calcium hypochlorite and a proportion of a polyacrylic acid compound have been produced. the compositions provide accurately controlled concentrations of available chlorine to bodies of water such as swimming pools by reducing the solubility off the calcium hypochlorite. In addition, when employing dispensers for water soluble chemicals in treating very hard or highly alkaline water, inhibition of scale formation and prevention of scale build-up in the dispenser is achieved when the novel compositions are used.

Abstract: Novel alkoxysilane ester cluster compounds are disclosed. These compounds have the formula:RSi[OSi(OR').sub.3 ].sub.2 OR"wherein R is hydrogen, an alkyl, alkenyl, aryl or aralkyl group, and each R' and the R" groups is independently selected from alkyl, alkenyl, aryl and aralkyl with the proviso that at least a majority of the R' radicals are sterically hindered alkyl groups having at least 3 carbon atoms. The preparation of these novel alkoxysilane ester cluster compounds and their use as functional fluids are also disclosed.

Abstract: An improved mandrel assembly construction for use in an isostatic press. The compacted body is pressed onto the mandrel and an improved assembly is utilized to free the body from the mandrel and remove the body from the tooling so that the body can be subjected to further processing. A pressure intensifier is used to apply pressure to the mold bodies and a separate air spring is used to return the pressure intensifier piston to its original position.