Abstract: The process is described wherein molybdenum values are separated from an aqueous solution containing tungsten. The molybdenum is converted to a thiomolybdate ion and the resulting solution is contacted with a suitable amount of organic extractant for a sufficient period of time to preferentially extract the thiomolybdate. The organic extractant including the thiomolybdate is separated from the aqueous solution comprising the unextracted tungsten values. The molybdenum values are stripped from the separated organic extractant by contacting with an aqueous solution containing sufficient amount of an oxidizing agent suitable for oxidizing the thiomolybdate complex ion to the molybdate ion which in turn is soluble in the aqueous solution. The organic extractant is then recycled for extracting the thiomolybdate complex ion and the molybdate ion may be recovered from the aqueous solution by conventional methods.

Abstract: In a process for producing ammonium metatungstate from ammonium paratungstate, ammonium paratungstate is introduced in the anode chamber of an electrolytic cell which is separated from the cathode chamber by an inert liquid permeable media, when a direct electric current is passed through the cell, ammonium ions migrate to the cathode compartment resulting in an increased concentration of metatungstate in the anode chamber.

Abstract: In a process for preparing ammonium paratungstate from a heavy metal alloy, the metal alloy is introduced as an anode into an electrolytic cell containing an aqueous electrolyte solution comprising ammonium hydroxide and ammonium nitrate. Ammonium paratungstate is formed when a direct electric current is passed through the cell.

Abstract: Disclosed is a process for removing molybdenum values from aqueous solutions containing tungsten values comprising sulfidizing said solution to an extent sufficient to convert substantially all of the molybdenum values to a thiomolybdate species, said sulfidizing being substantially less than the extent necessary to convert substantially all of said tungsten values to a thiotungstate species and contacting the resulting solution containing the thiomolybdate complex ion with a suitable amount of an organic extractant for a sufficient period of time to preferentially extract the thiomolybdate complex ion into the organic extractant, said organic extractant comprising an aromatic organic solvent and a quaternary ammonium compound of the formula R.sub.3 (CH.sub.3)N.sup.+ A.sup.-, wherein R is an alkyl group having from about 8 to 10 carbon atoms and A is an anion derived from a mineral acid.

Abstract: Cobalt is recovered from byproduct streams from a basic process by contacting the byproduct streams with aluminum metal for a sufficient period of time to produce cobalt metal as a precipitate. The basic process is the type wherein cobalt ions in solution are complexed with ammonia in the presence of halide ions to form an ammine halide solution from which a cobalt containing precipitate is separated. The precipitate is subsequently reduced to form a cobalt metal powder.

Abstract: Ferric iron is removed from an aqueous chloride solution containing other cations by extracting ferric iron with a liquid organic extractant comprising a ketone having less than about eight carbon atoms for a sufficient period of time to extract ferric iron into the organic liquid extractant. The organic liquid extractant is separated from the aqueous chloride solution containing other cations and the ferric iron is stripped from the organic liquid.

Abstract: An electrical connector which is adapted to be terminated to individual conductors of a cable or to conductive portions on opposite faces of a substrate includes a cover member having a front and back section forming a cavity. A plurality of terminals which are arranged along a pair of parallel spaced rows within the cavity have conductor engaging portions facing outwardly for engaging individual conductors and substrate engaging portions facing inwardly for engaging conductive portions on opposite sides of a substrate. The connector may be used to provide cable interconnect or alternately interconnect with a substrate.

Abstract: A hand tool for cleaving optical fibers includes a means for supporting and tensioning an optical fiber, a lever pivotably mounted on the tool body for hand actuation, and means for severing an optical fiber including a cutting element operably associated with the lever for moving the cutting element toward and across the axial direction of an optical fiber.

Abstract: A splice for holding the ends of optical fibers in end to end relationship includes a pair of sections having mating planar surfaces in engagement. One of the surfaces has an axially aligned groove facing the other surface to form an opening. The fiber receiving member comprises an elastomeric material of sufficient resilience to permit the opening to expandably receive optical fibers dimensioned larger than the opening. A sleeve is mounted about the receiving member for holding the sections in assembled relationship.

Abstract: In a process for recovering tungsten from cemented tungsten carbide, the cemented tungsten carbide is oxidized to form an oxidized product which is digested in an aqueous solution of an alkali metal hydroxide to form a water soluble alkali metal tungstate portion and an insoluble portion. The improvement of the present invention provides for recovery of tungsten values from the above mentioned insoluble portion by digesting the insoluble portion in an aqueous alkali metal hydroxide solution with a suitable amount of titanium oxide to promote the formation of a soluble alkali metal tungstate.

Abstract: The efficiency of an extraction process using a dialkyl phosphoric acid as an active extractant for separating extractable soluble metallic values from an aqueous solution is improved by the presence of a sufficient amount of a dialkyl naphthalene sulphonic acid as a modifier for the extractant.

Abstract: In a process for recovering tungsten from cemented tungsten carbide, the tungsten carbide is oxidized to form an oxidized product and the oxidized product is digested in an aqueous solution of alkali metal hydroxide to form a soluble portion containing tungsten values and an insoluble residue portion. According to the improved process of the present invention, tungsten values are recovered from the insoluble residue portion by mixing the insoluble portion with an alkali metal carbonate to form a resulting mixture, roasting the resulting mixture in an atmosphere containing oxygen to oxidize the insoluble portion and form another product which is leached with water to recover soluble tungsten values.

Abstract: Cobalt is recovered from by-product streams from a basic process by heating the by-product streams containing ammonia for a sufficient period of time at a pH of about 8 to about 10 to produce an ammonia enriched vapor and an aqueous mixture comprising a solution substantially free of ammonia and another cobalt containing precipitate. The basic process is the type wherein cobalt ions in solution are complexed with ammonia in the presence of halide ions to form an ammine halide solution which is digested to form a cobalt containing precipitate. The precipitate is subsequently reduced to form a cobalt metal powder.

Abstract: A connector for making electrical contact between an external circuit and a planar substrate of the type having opposing faces with the sides having conductive portions thereon includes an insulating housing having an interior area for receiving the substrate. Means are provided for resiliently supporting the substrate on one face thereof. A plurality of contacts are fixedly mounted within the interior area with each contact including a projecting portion adapted to be resiliently biased over the other face of the substrate. The contacts hold the substrate against the resilient supporting means and each contact further includes a portion for contacting conductive portions on the marginal edge portions of the substrate.

Abstract: A fiber optical connector includes a pair of fiber supporting members each having at least one axially aligned channel for accommodating the fiber. A fiber holding member is associated with each supporting member and includes at least one projection for engaging a fiber within respective channel. The holding and supporting members form an integral assembly for holding the fibers with the ends thereof projecting a predetermined distance from the end of respective channels. A separate fiber receiving member includes a fiber junction region having at least one channel therein of sufficient length to hold said projecting fibers in end to end relationship. A U-shaped transversely displaceable member is provided for engaging and securing respective fiber tips at the junction of the fibers within said channel.

Abstract: An apparatus for mounting a device on an exterior edge of a thin substrate includes a demountable member adapted to be positioned within an opening in the substrate in proximity to the edge. The demountable member includes means for engaging an interior edge of the opening for restraining outward and lateral movement of the demountable member. A fastener which engages the device is adjustably secured to the demountable member for urging the device toward the edge of the board.

Abstract: Cobalt is recovered by treating aqueous solutions containing ammonia and cobalt ions with a sufficient amount of an acid in the presence of a catalyst to convert the cobalt ions to a cobalt hexammine ion which is precipitated and separated from the resulting solution. According to another aspect of the invention, a cobalt compound is precipitated from an aqueous solution of cobaltic hexammine halide by treating the solution with a metallic hydroxide and the precipitate is subsequently reduced to form fine cobalt powder.

Abstract: The instant invention relates to a method of preparing an electrical contact from sub-micron size silver and less than two micron size cadmium oxide particles with the contact having finally dispersed particles of cadmium oxide within grains of silver. In the instant invention the particles of silver and cadmium oxide are intimately blended together and subjected to a reducing atmosphere at a temperature of from 321.degree. C. to 550.degree. C. to reduce the cadmium oxide and form an alloy powder of cadmium and silver. The alloy formed is held at an elevated temperature following reducing and then oxidized at a temperature of from 321.degree. C. to 550.degree. C. to precipitate a dispersion of cadmium oxide within grains of silver and form a silver-cadmium oxide alloy powder. In an alternative embodiment an alloy powder of cadmium and silver already prepared from sub-micron size particles of silver and less than two micron size particles of cadmium oxide is heated to a temperature of from 321.degree. C.

Abstract: Fine particle size cobalt metal powder is prepared by treating an aqueous solution of a soluble cobaltic ammine halide with a sufficient amount of a soluble metallic hydroxide to form a cobalt containing precipitate. The precipitate is separated from the solution and reduced in a reducing atmosphere to produce metallic cobalt.

Abstract: An electrical connector comprises an insulating body having an external surface with an area on the surface provided for abutting a printed wiring board. A plurality of contacts are internal the insulating body with at least a few of the contacts extending to the area. Leads extending outwardly from the surface are at a location exterior the area. A plurality of conductive paths on the surface provide electrical connection between the contacts and respective leads whereby a portion of the surface is unobstructed by contact tails for abutting the edge of the printed wiring board. The surface itself may be formed as part of a printed wiring board.