Abstract: An auxiliary electrode of platinum or palladium is immersed in the electrolyte of a lead-acid battery and connected to the negative plate of the battery so that, when the battery is employed in float service, hydrogen evolves on the auxiliary electrode whereby the parasitic current equivalent to the hydrogen evolution increases the float current to the positive plate of the battery.

Abstract: A process for recovering metal values from sulfide ores or concentrates by a fluid bed roast-reduction smelting-converting process which delivers to the reduction smelting furnace either a blend of dead roasted concentrate and green concentrate or a partially roasted concentrate, either feed mixed with a carbonaceous reductant and silica flux, and either feed containing only sufficient sulfur to produce a matte, in which the iron is present as metallic iron, and which has a sulfur deficiency of about 0% to about 25% with respect to base metals, and which is later converted to a low iron matte by blowing and slagging the iron with silica flux.

Abstract: Directed to the use of non-resonant laser energy to initiate reactions in reaction mixtures containing ingredients of the kind and in the amounts capable of forming chain reactions.

Abstract: An electrode and sludge collector support device is provided which permits the immersing of electrode and sludge collector into an electrolytic plating bath and which permits the removal of spent electrodes and subsequent replacement of electrodes without the removal of the sludge collector from the bath.

Abstract: The production of polymeric bodies having included, isolated areas of fine metal or metal oxide particles dispersed therein by mixing a metal compound with a polymer, converting the resulting mixture to a desired shape and irradiating selected areas of the shape with laser light to decompose the metal compound in the irradiated areas.

Abstract: By contacting an aqueous cobaltous sulfate solution with an ion-exchange resin having bis--(2-picolyl)amine functional groups nickel is removed down to very low levels.

Abstract: A muffler for use with machines such as pneumatic drills consists of an elastomeric housing divided into an admission chamber and a series of muffler chambers. Within the housing are an inlet conduit communicating with the admission chamber and each muffler chamber, an exhaust conduit communicating with each muffler chamber as well as with a tail pipe outside the housing, and a Helmholtz resonator communicating with the admission chamber.

Abstract: Anode slimes from an electrorefining operation are fed, together with sulfuric acid, into a heated pelletizer wherein a sulfation reaction occurs, simultaneously with pellet formation, to solubilize copper, nickel and tellurium contained in the slimes.

Abstract: Directed to non-destructive testing, particularly ultrasonic inspection of round stock such as tubing, pipe and rod wherein the inspection is conducted within a water tank to provide ultrasonic coupling of the ultrasonic probe or probes employed wherein the distance between the probe or probes and the surface of the round stock being inspected is maintained essentially constant during the course of the test to assure reliable inspection results and wherein the materials handling aspects of the testing are simplified.

Abstract: A nickel matte in which the atomic ratio of S:(Ni+Co+Cu) is less than 0.7 is fragmented and slurried with water or an aqueous nickel sulfate solution to ensure that the S:(Ni+Co+Cu) ratio for the slurry as a whole exceeds 0.4, the slurry is heated under pressure in the presence of oxygen to form a basic nickel sulfate and the reacted slurry is treated with lime to convert the basic nickel sulfate to nickel hydroxide. The nickel hydroxide is then separated from gypsum by physical separation and thereafter dissolved in spent sulfate electrolyte to generate fresh electrolyte from which nickel can be electrowon.

Abstract: An inverting circuit of the series resonant type and including a pair of SCR's operated at variable off-times for controlling the charging of a battery. A control circuit is provided for gating the SCR's at appropriate times in response to sensed circuit current, and battery voltage. Instantaneous resonant circuit current is monitored to derive timing information for firing the SCR's and for anticipating commutation failures.

Abstract: Discloses the use of nickel-cobalt alloy strike deposits especially ultra-thin nickel-cobalt alloy strike deposits on directly plateable plastics whereby difficulties encountered in plating directly plateable plastics are obviated and plated objects suitable for service conditions 3 and 4 or equivalent service conditions are provided. Especially advantageous results are obtained when the strike deposit contains at least about 30% cobalt.

Abstract: Ruthenium-iridium electrodeposits are prepared from aqueous acid solution containing ruthenium, iridium, a fluoborate salt, fluoboric acid, and optionally sulfamic acid. The baths are especially useful for preparing insoluble anodes.

Abstract: A bipolar electrode support structure for use in a lead acid battery is constituted by a porous matrix of valve metal, impregnated with lead or a lead alloy, and is provided on at least one surface thereof with a rim-portion at which little or no lead is exposed. The rim-portion is used to maintain an electrolyte-tight seal in operation.

Abstract: A process and products produced thereby, e.g., ferrites, in which ceramic powder particles are subjected to high transmissive energy milling under dry conditions and with given ratios of impacting media to powder, the milling being conducted for a period beyond the threshold point of the powder constituents, whereby dense, composite powder particles are obtained having an interdispersion of initial constituent particles, a large internal interfacial surface within individual product powder particles, etc.

Abstract: The tensile ductility of low chromium substantially precipitation hardened nickel-base alloys within the temperature range of 600.degree. C. to 900.degree. C. is improved through the incorporation in the alloys of controlled amounts of yttrium.

Abstract: Iridium compounds are produced by refluxing a diammonium hexahalo salt of iridium and sulfamic acid in an aqueous medium for more than thirty hours. When the diammonium hexachloro salt of iridium is used, the iridium product is an olive green salt having a melting point above 350.degree. C. The iridium products are useful as constituents of electroplating baths.

Abstract: A copper-containing sulfidic material is dead-roasted at a temperature of at least 750.degree. C. and the resulting calcine is leached in a sulfuric acid solution to dissolve most of the copper in preference to any iron, nickel and cobalt in the material.

Abstract: Powder rolling apparatus, for the production of strip equal in width to the roll length, is provided with edge restraint devices in the form of cylindrical blocks mounted in the roll gap region with their axes parallel to the roll axes and rotatably driven to cause an end-face of each restraint block to move in frictional contact with the end-faces of the rolls.

Abstract: Use of a burner design featuring a tunnel of high length to diameter ratio enables the flash-smelting of sulfides to be carried out in a much more confined space than heretofore possible.