Abstract: A vibration damper attachable to a pole structure and comprised of a plurality of individual vibration damping discs or weights mounted for controlled and limited movement within a housing together with rods insertable in an improved fashion through openings in the discs and separator washers for vertically stacking the discs along with separator washers within the housing.

Abstract: Improved sectionalized depressible opener tab for easy open containers wherein one of the sections can be relatively small as compared to the dimensions of the overall tab while being connected by an improved hinge arrangement to the remainder of the tab. This hinge arrangement permits either a simultaneous selective depression of multiple tab sections or depression of only one tab section to obtain initial separation of the tab from the container component with which the tab is associated and a controlled release of internal container pressure.

Abstract: Synergistically performing flame retarding compositions are provided for cellulosic boards, such as hardboards, particleboards and fiberboards. The synergistically performing compositions consist of three components, namely, an aluminous material, a naturally occurring borate-containing mineral and a phosphate or sulfate salt. Incorporation of these compositions in the boards allows consistent production of flame-retarded products with a Class I or better fire rating.

Abstract: A high purity periclase grain having less than 8 volume % porosity, less than 2% SiO.sub.2, and a CaO:SiO.sub.2 weight ratio not over 1.0 is produced in a single fire process by mixing from 0.5 to 1.5% finely divided SiO.sub.2 with a magnesium hydroxide containing (on the ignited basis) at least 98% MgO, not over 1.5% CaO, and not over 1.0% SiO.sub.2, drying the admixture, compacting it at a pressure of at least 10 tons/in.sup.2 (1400 kg/cm.sup.2), and firing the compacts at a temperature of at least 1700.degree. C.

Abstract: A magnesium aluminate spinel-bonded refractory can be formed which does not exhibit undue expansion (due to the reaction of magnesia and alumina to form magnesium aluminate spinel) between the raw, compacted state and the fired, ceramically bonded state when fired to a temperature of 1400.degree. C if a very finely divided alumina with dense particles is used. More specifically, the alumina used has an average particle size of less than 5, preferably less than 2, microns, and a specific surface of less than 30 m.sup.2 /g, preferably about 5 m.sup.2 /g (i.e., the small crystallites or particles are dense and do not have a high surface area, as do finely divided active aluminas).

Abstract: A jacketing system for cylindrical storage tank structures of the type used for oil, water, etc., wherein vertically disposed insulated panel sections are affixed to wire cable members or the like on the outside walls of the tank structures and improved articulated fasteners are provided for securing the panel sections to the wire cable members.

Abstract: A fully integrated process is provided for the recovery of valuable components from waste materials generated in electrolytic aluminum reduction systems. The waste materials, such as spent pot linings, channel and trench cleanings, floor sweepings and spent alumina from offgas purifying dry scrubbers, are combined, then pyrohydrolyzed at elevated temperature. Fluoridic values, such as NaF and HF can be recovered from the offgas generated by pyrohydrolysis, while alumina and Na.sub.2 O values, or if desired, sodium aluminate, is reclaimed from the solid residue of pyrohydrolysis.The fluoridic values from the pyrohydrolysis offgas can be used for the manufacture of both electrolytes for aluminum reduction cells and also for the production of anhydrous HF. The alumina from the pyrohydrolysis residue can be reclaimed by a Bayer process-type leach with a caustic solution and the recovered high purity alumina utilized, for example, as reduction cell feed and/or for scrubbing reduction cell offgases.

Abstract: This invention relates to a method of forming an oxide coating on an aluminum surface having a controlled surface resistance and if sufficiently thick have an integral color by treating the aluminum surface with a neutral or slightly basic aqueous solution containing at least 0.001 gm/liter of a difficultly soluble magnesium compound expressed as MgCO.sub.3. The temperature of the bath should exceed 65.degree. C and the pH should range from about 7 to 9.

Abstract: A pretreatment system is provided for transforming the goethite constituent [FeO(OH)] of goethitic bauxites to hematite and/or magnetite at high temperatures and pressures. The system employs a number of float-type, liquid displacement pressure pumps, both for charging caustic-containing bauxite slurries of high solids concentration to the system and for discharging the treated slurries. The system operates at temperatures in excess of 250.degree. C and up to temperatures required for the total conversion of the goethite content to hematite or magnetite which, in turn, significantly increases the yield of recoverable alumina. Since the slurry to be pretreated is of high solids concentration, e.g.

Abstract: This invention is directed to the formation of massive aluminum-magnesium alloy plate wherein the plate is cast directly to size then homogenized at a temperature greater than 1020.degree. F for more than 12 hours to provide good mechanical properties and excellent weldment characteristics.

Abstract: The invention relates to an improved method of removing gaseous or volatile contaminants from metal powders or porous compacts thereof wherein the powder or compact is subjected to a procedure comprising vacuum treatment, back filling with an innocuous depurative gas and another vacuum treatment to remove gaseous contaminants and depurative gas. The evacuation and back filling steps are usually repeated several times. Preferably, the depurative or wash gas is one which is capable of reacting with the metal powder or alloy constituents thereof to form a solid reaction product. After the gaseous and/or volatile contaminants are removed, the powder or compact is compressed to full density and then subjected to additional fabrication, if so desired.

Abstract: Acidic impurity, such as HCl, is removed from chlorofluoromethanes of the formula CHCl.sub.n F.sub.3-n, where n is 1 or 2, by scrubbing the contaminated fluorocarbon with an aqueous solution made from a mixture of trisodium phosphate and sodium hydroxide. Use of this solution as scrubbing medium allows purification of the contaminated fluorocarbon without appreciable decomposition and also without generation of a significant quantity of environmentally objectionable waste stream of high phosphate content. The presence of NaOH in the scrubbing medium provides in situ regeneration of mono and disodium phosphates to trisodium phosphate.

Abstract: This invention is directed to a process for forming a hydrophobic and highly oleophilic coating on an aluminum surface which comprises treating the aluminum surface under aqueous alkaline conditions with a long chain aliphatic carboxylic acid (or an equivalent carboxylate compound), such as isostearic acid, which has one or more short secondary alkyl groups on or near the nonpolar end of the carboxylate compound. The coating can be formed by treating the surface with an aqueous alkaline solution which contains the carboxylic acid or the coating can be formed by mechanically deforming or upsetting the aluminum surface to expose a fresh aluminum surface to a carboxylic acid (or its equivalent) and a compound which generates alkaline conditions on the aluminum surface. In the latter instance, the carboxylic acid and alkaline compound is preferably incorporated into a metal-working lubricant used to facilitate deformation.

Abstract: This invention relates to the formation of a hydrophobic and usually oleophilic coating on an aluminum surface by mechanically deforming or upsetting the aluminum surface to disrupt the natural oxide coating in the presence of alkaline agents and a long chain aliphatic carboxylic acid or other equivalent long chain aliphatic carboxylate compounds. Preferably, the carboxylic acid and alkaline agent are incorporated into a metal-working lubricant which is maintained on the aluminum surface during fabrication, such as rolling, so that the hydrophobic coating is formed simultaneously with fabrication and thereby avoid the necessity of a separate coating operation.

Abstract: This invention relates to a method of pretreating an aluminum surface for the resistance welding thereof wherein an oxide coating is formed on the aluminum surface having a controlled electrical resistance and then the oxidized surface is stabilized by treatment with a hot aqueous alkaline solution containing long chain carboxylic acids.

Abstract: The invention is directed to a method of bonding refractory hard metal materials such as TiB.sub.2 wherein aluminum carbide is formed in situ at the interface between the refractory hard metal and a substrate. The bond formation is greatly accelerated by passing an electrical current across the interface.

Abstract: An improved cooling system is provided for hot, aqueous caustic solutions, such as received from evaporators employed for the concentration of electrolytically produced dilute caustic solutions. The improved cooling system consists of at least one closed loop circuit in which the hot caustic solution circulates under pressure and in the absence of air. The circuit includes suitable heat exchanger means, for example, a shell and tube device or other known heat transfer apparatus. The novel system not only allows the maintenance of controlled cooling rates, reduces scale formation on heat exchanger surfaces, improves caustic yield and quality due to lessening of carbonate formation but also improves the energy balance of the evaporation process.

Abstract: Cellulosic boards, such as hardboards, fiberboards and particle-boards, are flame retarded by incorporation of a synergistically acting alumina trihydrate-ulexite composition in the boards. The alumina trihydrate-ulexite flame-retarding agent provides a board of satisfactory strength properties with a flame spread at least equivalent to that of a commercial Class I-rated hardboard when the loading of the flame-retarding agent in the board is kept at 50% or below of the total weight of the flame-retarded board.