Abstract: A process for the removal of heavy metals uranium and transition metals other than noble transition metals from solution by contacting the solution with the product obtained by reacting an inorganic solid eg. silica gel containing surface hydroxyl groups with a silicon compound of defined formula containing a free thiol group or a free amino group and either an --OR group or a halogen atom under conditions which effect reaction between the hydroxyl group and the --OR group or halogen atom thereby bonding the silicon compound to the inorganic solid.

Abstract: A novel group of iron-base sintered alloys especially suitable for valve seat manufacture having excellent wear resistance and good machinability is provided. The alloy is produced by a combination of specific atomized pre-alloyed powder, iron powder and graphite powder by compacting and sintering processes. Various manufacturing methods with or without infiltration of filler materials into pores in the sintered product to improve wear resistance and machinability are disclosed.

Abstract: The storage stability of aqueous p-benzoquinone and in general compounds of the formula ##STR1## where R.sub.1, R.sub.2, R.sub.3, and R.sub.4 may be the same or different and are selected, for example, from hydrogen, hydroxyl, cyano, halogen, carboxylic acid or ester, thio, thioethers, sulfonic acid or ester groups, sulfinic acid or ester groups, amino, alkylamino, dialkylamino, arylamino, diarylamino, alkylarylamino, cycloalkylamino, acylamino, acyloxy, acyl, nitro, C.sub.1 -C.sub.20 substituted or unsubstituted, saturated or unsaturated, straight chain, branched or cyclic aliphatic moieties, C.sub.6 -C.sub.32 substituted or unsubstituted aromatic moieties, and C.sub.1 -C.sub.18 alkoxy moieties, are improved by the addition of water-soluble, acidic or neutral inorganic salts of Periodic Table Group IA elements, Group IIA elements, and nickel. Such salts are typified by CaCl.sub.2, KCl, MgSO.sub.4, NaBr, NaCl, and NiCl.sub.2.

Abstract: The essentially monochromatic infrared radiation from a laser device with a frequency coincident with a vibrational absorption band of an isocyanide, for example, methyl isocyanide (CH.sub.3 NC), leads to isomerization to the corresponding nitrile, in this example, acetonitrile (CH.sub.3 CN). This isomerization is accomplished isotopically selectively for vibrational bands which exhibit an isotope shift. As a consequence, the enrichment and separation of nitrogen or carbon isotopes may be accomplished.

Abstract: A process for continuously separating uranium isotopes by oxidation-reduction reaction using an anion exchanger comprising the steps of subjecting an eluant containing a deactivated oxidizing agent and a deactivated reducing agent as a mixture to oxidation to regenerate the deactivated oxidizing agent, separating the regenerated oxidizing agent from the eluant with an anion exchanger and reusing the regenerated oxidizing agent for continuing the separation of uranium isotopes.

Abstract: A positive cobalt electrode for alkaline storage batteries formed to contain aluminum hydroxide. A porous supporting grid of conducting material is immersed in an impregnating solution containing a cobalt salt dissolved in a solvent and at least one aluminum salt in solution. The grid is subsequently immersed in an alkaline medium where the hydroxides are precipitated.

Abstract: The oxidation of uranium is catalyzed with water-soluble copper or zinc chelates. An aqueous solution is prepared containing carbonate or bicarbonate ion, an oxidizer such as hydrogen peroxide or oxygen, and a water-soluble copper or zinc chelate which has at least two amino, carboxylic acid, or thiocarboxylic acid donor groups. The solution is pumped into an underground deposit of uranium. The water-soluble +4 state uranium is oxidized to the water-soluble +6 state which forms a complex with the carbonate ion. The solution is pumped to the surface and is recycled after precipitation of the uranium.

Abstract: A hinge mechanism for a luminaire for outdoor lighting which allows the lower housing including the lamp refractor to be pivoted to a position enabling access to the luminaire interior. When it is desired that the lower housing be detached, the hinge retainer is released to permit detachment of the lower housing. The hinge mechanism includes a transverse rod resting in a trough formed by one or more channel supports. To prevent the rod from being removed from the channel, a U-shaped spring holder is held in a position where each U leg normally extends over the opening of the hinge channel support. These spring holders retain the channel in the trough. To detach the hinge, the base of the U is manually grasped and retracted to withdraw the spring legs from its extending position. The rod in channel engagement may be detached to remove the refractor housing from the luminaire.

Abstract: An adhesive composition comprising 100 parts by weight of at least one .alpha.-cyanoacrylate monomer and 5 to 300 parts by weight of trichlorotrifluoroethane.

Abstract: Described herein is a method for the manufacture of materials such as tools, machines or parts thereof composed of at least two sections joined together by composite sintering from sintered alloys with an iron, nickel or cobalt base wherein at least two powdered metallic mixtures having differing metal carbide contents are separately prepared and poured, one after the other, into a mold and then formed into a pressed body; the pressed body is then sintered at the lowest temperature sufficient to cause alloy formation in the mixture having the lowest sintering temperature, and then hot-pressed to complete alloy formation in the pressed body and achieve maximum density.

Abstract: A process for reducing plutonium is provided in which hydrazine is added as a reducing agent to a nitric acid solution of tetravalent plutonium in the presence of active carbon catalyst to thereby reduce tetravalent plutonium into trivalent plutonium.

Abstract: P/M products are provided having improved resistance to wear and abrasion by adding controlled amounts of pre-alloyed refractory carbide material to metal powders selected from the group consisting of iron-base, nickel-base, aluminum-base, copper-base and beryllium-base powders following which the mixed powders are compacted and sintered to the desired shape.

Abstract: Methylamine (CH.sub.3 NH.sub.2) is dissociated into CH.sub.3 .multidot. and NH.sub.2 .multidot. radicals when irradiated with the output from an infrared laser. Ammonia (NH.sub.3) is then formed inherently through radical and molecular collisions. By tuning the laser to the appropriate frequency, the dissociation process is isotopically selective. As a consequence, ammonia, or other nitrogen containing compounds, are obtained which are selectively enriched in .sup.14 N or .sup.15 N. Carbon isotopes may be separated with essentially the same technique. .sup.BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to enrichment and separation of isotopes, in particular .sup.14 N and .sup.15 N, and .sup.12 C and .sup.13 C by multiphoton dissociation of methylamine.2. Description of the Prior ArtThe projected use of .sup.15 N in the nuclear industry is expected to reach 500,000 kg/year. Major use is in fuel pellets and cladding in uranium and plutonium nuclear reactors. Also, .sup.

Abstract: The anti-rust properties exhibited by the aqueous fluids described herein are provided by one or more of the rust inhibitor additive composition prepared by reacting:(A) at least one aliphatic polycarboxylic acid acylating agent characterized by the presence within its structure of an aliphatic hydrocarbyl-substituent with(B) at least one hydroxy-substituted aliphatic amine, and(C) at least one basically reacting alkali metal compound.

Abstract: A process and apparatus are described for stripping uranium values from a uranium-loaded organic extractant phase containing, usually, a tertiary amine capable of forming organic-soluble uranium complexes. The sulphate-containing aqueous strip liquor is fed in co-current with the extractant phase to be stripped through a number of mixing stages in series connected one to another without intermediate settling stages and finally to a final settling stage. A "primary" dispersion is maintained in each mixing stage and controlled stepwise pH adjustment of the mixing stages is effected by metered addition of a base, such as ammonia.

Abstract: Radiation-contaminated ammonium nitrate is heated in solution to about 100.degree. C. in the presence of finely powdered calcium oxide or lithium hydroxide. Ammonia and water vapor are given off leaving an alkaline or alkaline earth nitrate which can then be safely decomposed by calcination into a metal oxide and oxides of nitrogen. The metal oxide can be recycled in a continuation of the process. The oxides of nitrogen can be passed through water to produce nitric acid useable in dissolving oxides of fissionable materials and the ammonia may be used in aqueous solution to react with nitrates of nuclear fuel or breeder metals in the very process that produces the by-product ammonium nitrate. Thus, all by-products and reagents can be reconverted and recycled.

Abstract: Uranium oxide is recovered from an aqueous solution of uranyl halides by extracting uranyl halide from the aqueous solution with an organic liquid, forming a crown ether uranyl halide complex in the organic liquid, and then contacting the uranyl halide crown ether complex with water, carboxylate ion, and light under suitable conditions. Also disclosed are certain novel crown ether uranyl halide complexes and their preparation. Also disclosed is the use of 18-crown-6 to selectively recover uranyl halide from a solution thereof containing other metal salts.

Abstract: An improvement in a method for the separation of carcinoembryonic antigen (CEA) from a plasma sample preparatory to conducting an assay for said antigen is disclosed.

Abstract: Process for manufacturing sintered compacts of aluminum-base alloys having contents of Si, Cu and Mg, which comprises, mixing an aluminum powder and/or an Al-Si alloy powder with at least one powder of Al-Cu-Mg-Si, Al-Cu-Mg and so on in such a proportion, that the former will amount to 70% or more, based on the total weight of the resulting powder mixture, and that the over-all composition of the resulting powder mixture will lie essentially in the range of 1.0.about.6.0% by weight of Cu, 0.2.about.2.0% by weight of Mg, 0.2.about.2.0% by weight of Si and rest of Al, compacting the so obtained powder mixture into shapes and then sintering the so obtained green compacts in the air.

Abstract: A method is disclosed for producing attrition-resistant particles of dolomite or limestone by partially glazing the exterior of the particles with a suitable glaze-forming flux, the resulting composition being useful for removing sulfur dioxide from a combustion gas using the attrition-resistant particles.