Abstract: Flame-retardant cellulosic hardboards and particle boards are made by incorporating in the boards a synergistically acting flame-retarding composition containing at least about 30% by weight (calculated on the weight of the flame-retarded board) alumina hydrate in combination with one of the following compositions: melamine-formaldehyde-phosphate, urea-formaldehyde-phosphate or dicyandiamide-formaldehyde-phosphate.

Abstract: This invention generally relates to the electrocoating of metal products and in particular is directed to the treatment of continuous aluminum sheet or strip to form a chromium phosphate type conversion coating thereon, subsequently electrocoating the sheet or strip, applying a top coat and then curing both the electrocoated film and the top coat. The electrocoated sheet or strip exhibits superior coating adhesion.

Abstract: This invention relates to the formation of a hydrophobic and usually oleophilic coating on an aluminum surface by treating the aluminum surface with an aqueous alkaline solution containing long chain aliphatic carboxylic acids, alkali metal salts or ammonium salts of such acids or other long chain aliphatic compounds which generate a long chain carboxylate anion in an alkaline solution.

Abstract: The invention relates to an electromagnetic casting apparatus having an annular coolant jacket wherein a ring-type electromagnetic inductor is employed as the innermost wall of the coolant jacket and the inductor is preferably provided with conduits to direct coolant from within the coolant jacket onto the metal being cast.

Abstract: Modification of the pore volume distribution of an alumina base catalyst support is accomplished by treating an alumina precursor of chi-rho-eta structure with an aqueous ammonium carbonate or bicarbonate solution under pressure at about 100.degree.-160.degree. C for 10-24 hours, followed by drying and thermal activation at a temperature of at least about 500.degree. C. The resulting support will possess more than about 70% of its total pore volume in the 45-300 angstrom unit pore diameter range. This pore volume distribution renders it particularly suitable for use as a catalyst carrier for hydrodesulfurization purposes.

Abstract: A refractory composition suitable for nozzle gunning, particularly onto hot surfaces, is made from sized refractory aggregate, bentonite, aluminum sulfate, and hydrated lime. Preferably the weight ratio of aluminum sulfate to hydrated lime is about 2.7.

Abstract: A device is provided for heating liquids, slurries and the like by direct condensation of steam. The device consists of a vertically oriented, substantially cylindrical elongated vessel, wherein liquid to be heated is introduced at the top and the heated liquid is removed at the bottom. The device is provided with at least one liquid treatment zone consisting of a perforated tray placed perpendicular to the downward flow of the liquid, a downwardly conveying cone-shaped underflow located below the tray and a hemispherical impingement surface positioned below the opening of the cone-shaped underflow. Steam is introduced in the zone at a point where the liquid exits from the underflow. This arrangement allows a maximum degree of heat exchange between the steam and the liquid without causing "hammering" due to excessive steam condensation.

Abstract: The invention relates to a method and device for accurately feeding discrete quantities of pulverulent material in a repetitive manner. The invention is advantageously employed in feeding particulate matter to a gas-solids contacting apparatus which is under positive pressure and particularly such apparatus which treat the fluoride containing off-gases from an aluminum reduction cell with particulate alumina to remove fluorides from such off-gases.

Abstract: This invention relates to a method of treating tar and fluoride laden gases for the removal of tar and fluorides therefrom, particularly the cell off-gases from a Soderberg reduction cell, an anode baking furnace and the like wherein reduction-grade alumina is entrained in the tar and fluoride laden gases and then this mixture is passed through a foraminous plate above which is maintained a turbulent mass of alumina.

Abstract: An electromagnetic casting apparatus wherein a ring-type inductor generates an electromagnetic field having a flux density which diminishes in intensity toward the top of the inductor to more efficiently control the shape of the molten metal within the inductor.

Abstract: Improved bottom for a seamless metal container body wherein the central portion of the bottom that includes a stiffening embossment is joined to the other portions of the bottom in an improved manner by a hinge-like section that permits selected and controlled outward flexing or bulging of the bottom when the container is sealed and subjected to internal pressures developed by the contents of the container. Despite such outward flexing of the bottom, the container still is provided with a stable bottom to rest upon in its sealed and pressurized condition.

Abstract: This invention relates to an improved method of melting metal, particularly reactive metals, such as aluminum, wherein heated molten metal is withdrawn from a first chamber and a portion of the withdrawn molten metal is transferred to a second chamber containing solid metal so as to melt same and a portion of the withdrawn metal is recirculated to the first chamber so as to maintain melt homogenuity therein.

Abstract: Improved foldable hand delivery cart made up of a main and a pair of side or wing panel sections interlockingly hinged together by means of hinge elements which extend for substantially the entire lengths of the panel sections and simultaneously form structural columnar support components for said panel sections.

Abstract: This invention relates to an improved easy open ecological closure member for containers as well as processes and equipment for producing the same. The container closure member is provided with one or more readily depressible and hinged opening tabs or buttons, that do not readily separate from the closure member upon becoming depressed due to the novel structure and arrangement of the buttons, their base portions and their frangible tear line sections all of which contribute to a selective concentration of stresses in the frangible tear line sections during opening.

Abstract: This invention relates to an easy open ecological closure member as well as processes and equipment for producing the same. The closure member is provided with readily depressible and hinged opening tabs or buttons, that do not readily separate from the closure member upon becoming depressed due to the novel structure and arrangement of the buttons, their base portions and their frangible tear line sections, all of which contribute to a selective concentration of stresses in the frangible tear line sections during opening.

Abstract: A refractory cement is made by combining a clinker which is substantially all CaO.Al.sub.2 O.sub.3 (CA) with a roughly equal weight amount of an alumina which has been calcined to produce a carefully controlled morphology, particularly specific surface and pore size within relatively narrow ranges. Both materials are very finely divided, at least 80% passing a 325 mesh screen.

Abstract: A wiper system for the removal of sticky and/or moist particulate material such as bauxite or clay from the working surface of endless conveyor belts comprised of a plurality of individually adjustable wipers arranged in parallel fashion at the return side or flite of the belt, located at an angle to the main axis of the belt and flexibly mounted relative to the belt.

Abstract: This invention relates to an improved self-centering bottom block assembly for D.C. casting. The assembly comprises a bottom block which is slidably mounted on a supporting surface and which is provided with at least two guide extensions. Positioned below the D.C. mold are at least two recessed guide surfaces, the lower portion of which converges in the direction of the discharge end of the mold. The horizontal and rotational movement of the bottom block is restricted so as to ensure the insertion of the guide extensions into the recess defined by the guide surfaces and thereby guide the bottom block into the mold bore without contacting the mold body.

Abstract: A composition capable of being plastically deformed at high temperatures contains at least 98% MgO, less than 0.1% B.sub.2 O.sub.3, and, as principal subsidiary components, CaO, SiO.sub.2, and Al.sub.2 O.sub.3. Based on the total weight of the subsidiary components, there is about 65% CaO, from 25 to 33% SiO.sub.2, and from 10 to 2% Al.sub.2 O.sub.3. The composition is preferably substantially free of iron, but in any case the weight of Fe.sub.2 O.sub.3 is no more than one-tenth the weight of Al.sub.2 O.sub.3.

Abstract: This invention relates to a method of degassing prealloyed aluminum powder or compacts formed therefrom wherein the metal products are degassed by being subjected to a temperature between 450.degree. and 850.degree.F at a pressure less than 10.sup.-.sup.3 torr. The products of this process are characterized by high strength and fracture toughness and excellent corrosion resistance.