Abstract: The product prepared by the process consisting of the steps of (a) reacting a nitroalcohol of the formula ##STR1## where R and R.sup.1 can be hydrogen, methyl, ethyl or hydroxymethyl in about a 1:1 mole ratio with an alkylamine represented by the formula R.sup.2 NH.sub.2 where R.sup.2 is alkyl of from 1 to 4 or more carbon atoms or phenyl, benzyl, toluyl, or xylyl at about 50.degree.-70.degree. thereby effecting formation of a nitroalkylamine; (b) reacting the nitroalkylamine with nitrous acid at about 0.degree.-5.degree., thereby forming a nitroso compound; and (c) reducing the nitroso compound.

Abstract: A machine is disclosed for producing rigid sand cores from a molding mixture of a refractory granular material such as sand and a hardenable binder. These rigid sand cores then are used in foundries for metal casting. The machine of the present invention is capable of producing several different types of rigid sand cores including hollow shell sand cores, hot box cores and cold box cores. The machine includes means for curing the molding mixture used to produce shell sand cores and hot box cores by applying heat to the molding mixture after it is placed in a core or molding box. Other means are provided in the machine for curing cold box cores by applying a gas catalyst to the molding mixture after it is placed in the core box. The machine of the present invention is automatically controlled by a circuit arrangement which can be programmed by the machine operator.

Abstract: A secondary sampling device for particulate matter is disclosed which includes a plurality of sample splitters arranged in series wherein each sample splitter is perpendicular to those adjacent thereto.

Abstract: A process of producing molten iron in a blast furnace in which the alkali loading to the blast furnace is at least about four pounds of alkali oxides per ton of hot metal produced, in which the alkali metal content in the furnace slag fluctuates widely due to repetitive accumulation and purging of alkali metals in the furnace over extended operating periods with corresponding fluctuations in the sulfur content and temperature of the molten metal, and in which the MgO content in the furnace slag is in the range of about 6 to about 18% by weight. Olivine is added to the furnace charge, preferably on a substantially continuous basis at an average rate of about 10 to about 100 pounds of olivine per ton of molten iron produced in the furnace, to effect the removal of the alkali metals from the furnace in the furnace slag and thereby stabilize the furnace operation.

Abstract: The settling of finely-divided solids that are in suspension in an aqueous medium due to the presence of a colloidal argillaceous mineral is enhanced by adding a small but effective amount of hydrogen peroxide to the suspension. This invention is especially useful for treating aqueous suspensions of ultrafine clay and other materials resulting from the hydraulic concentration of an ore material, such as phosphate slimes.

Abstract: A new foundry core composition comprises foundry aggregate, a resin base such as an aqueous resole resin, a polyisocyanate, and a selected solvent therefor. The solvent is an acetal or ketal such as butyl acetal. The compositions are suitable for use in cold box, no-bake, and rapid no-bake processes.

Abstract: The settling of finely-divided solids that are in suspension in an aqueous medium due to the presence of a colloidal argillaceous mineral is enhanced by adding to the suspension a small but effective amount of at least one chelating agent. Effective chelating agents include malic acid, tartaric acid, nitrilotriacetic acid, and N,N,N.sup.1,N.sup.1 -ethylenediaminetetraacetic acid. This invention is especially useful for treating aqueous suspensions of ultrafine clay and other materials resulting from the hydraulic concentration of an ore material, such as phosphate slimes.

Abstract: A method is disclosed for beneficiating a fluorspar concentrate containing apatite as a gangue mineral, which includes further concentrating the fluorspar by a froth flotation process wherein the apatite is collected and floated with a cationic reagent in an acid flotation circuit and the fluorspar is depressed with fluoride ions.

Abstract: A modified clay paper coating composition comprising a montmorillonite clay having at least partially hydrolyzed aluminum chloride bonded thereto is made by treating montmorillonite clay with a non-aqueous solution of anhydrous aluminum chloride following by hydrolyzing with hot water. A paper substrate coated with this composition exhibits improved image light fastness when employed in a pressure-sensitive duplication system.

Abstract: The settling of finely-divided solids that are in suspension in an aqueous medium due to the presence of a colloidal argillaceous mineral is enhanced by adding a small but effective amount of an organic peroxide to the suspension. This invention is especially useful for treating aqueous suspensions of ultrafine clay and other materials resulting from the hydraulic concentration of an ore material, such as phosphate slimes.

Abstract: Novel 6-amino-9-(substituted benzyl)purines are prepared by allowing an appropriate substituted benzyl halide, e.g., a substituted benzyl chloride, to react with adenine under the appropriate conditions. Oxidation of the resulting purine derivatives yields the corresponding N.sup.1 -oxides. These compounds, i.e., both the purine derivatives and the N.sup.1 -oxides thereof, have anti-coccidial activity and are useful for controlling cecal and/or intestinal coccidiosis when administered in minor quantities to animals, in particular to poultry, usually in admixture with animal sustenance.

Abstract: A sand core and mold composition for use in casting metals comprising foundry sand, clay, water and from about 0.0025% to about 1% by weight of a water-soluble graft copolymer of acrylic acid and a minor amount of a water-soluble polyhydroxy polymeric compound, including water-soluble salts thereof.