Abstract: An improved process for separating sulfur from low grade surface ore is disclosed. The process involves mixing small particles of sulfur ore with a dilute aqueous solution of an agent to form a slurry. The agent used should be capable of combining with the gangue constituent of the sulfur ore particles such that the overall density of the combination of agent and gangue is substantially less than the density of the aqueous solution. The slurry is heated to a temperature under pressure so as to liquefy the sulfur and yet maintain substantially all of the water in liquid form. The slurry is agitated while heated, forming a dispersion of small sulfur droplets in the aqueous medium. The presence of the dilute agent allows the mixture to settle by gravity to form a molten sulfur phase and an aqueous gangue phase. The sulfur product is recovered as a single continuous phase of molten sulfur.

Abstract: An aluminum nitride powder has a crystallite size of 40 to 150 nm, measured by powder diffractometry and evaluated by the method of Scherrer, a primary particle size of 0.1 to 0.5 .mu.m, a specific surface according to BET of 5 to 50 m.sup.2 /g and a degree of whiteness of more than 91%, measured using light of a 400 to 700 nm wavelength against barium sulfate analytical reagent as standard of whitness.To prepare this aluminum nitride powder, metallic aluminum and monoamminealuminum chloride [AlCl.sub.3 (NH.sub.3)] are first molten together in an inert gas atmosphere at temperatures above 125.degree. C. and allowed to react with one another with evolution of hydrogen. 8 to 20 g of ammonia are then introduced per hour per mol of monoamminealuminum chloride into the aluminum-containing monoamminealuminum chloride melt at temperatures between 250.degree. and 400.degree. C., aluminum nitride being precipitated as a solid until the conversion of the aluminum is complete.

Abstract: A diamine platinum (II) complex represented by the general formula ##STR1## [wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a hydrogen atom or a lower alkyl group; and two X's are each a halogen atom or jointly form a group represented by ##STR2## (wherein R.sub.5 and R.sub.6 are each a hydrogen atom or a lower alkyl group) or a group represented by ##STR3## (wherein m is 1 or 2)].

Abstract: Organophosphorus compounds are prepared by reacting an unsaturated compound, such as a striaght-chain, branched or cyclic olefin or a diene having conjugated or nonconjugated double bonds, with a phosphine by a process in which phosphine and/or phosphine-containing compounds are subjected to an addition reaction with the unsaturated compounds in the presence of a solid heterogeneous catalyst. Particularly suitable heterogeneous catalysts are zeolites and phosphates.

Abstract: A method for producing trifluoroiodomethane in which a metal Mt selected from the group magnesium, zinc, cadmium, bismuth and tin is reacted in a first step (a) with a trifluorohalomethane, and the resulting reaction mixture is further reacted in a second step (b) with a component containing iodine to produce CF.sub.3 I. Compounds corresponding to the formula CF.sub.3.Zn.X.nL are also described.

Abstract: An NO abatement process wherein an NO-containing fluid is contacted with a polymeric cobalt(II) dioxygen diamine complex. The aqueous solution is recovered, purified by membrane separation to remove low molecular weight reaction products, optionally electrolytically regenerated, and recycled for the NO-containing gas contact. The cobalt(II) is complexed with an amine-containing polymer such as polyethyleneimine free of acidic, e.g. carboxylate, chelating groups.

Abstract: Processes for the removal of hydrogen sulphide from gas streams and for the regeneration of spent scrubbing liquor used in an absorber to remove hydrogen sulphide from a gas stream, are disclosed. In the former process, hydrogen sulphide is removed by five-valent oxovanadium which is simultaneously reduced to its four-valent state, the precipitation of which is prevented by having a sufficiently high concentration of total alkalinity present in the scrubbing solution. In the latter process the four-valent oxovanadium is oxidized to its five-valent state, preferably by an oxygen-containing gas, and a suffficently high concentration of total alkalinity is provided in the scrubbing liquor to yield a desired re-oxidation rate of the four-valent oxovanadium.

Abstract: The process for producing silicon suitable for use in solar cells is improved by reacting a gaseous silicon compound with aluminum wherein a finely dispersed molten surface of pure aluminum or an aluminum/silicon alloy is intensively contacted with the gaseous silicon compound during the reaction.

Abstract: New processes and equipment are disclosed for producing elemental phosphorus and thermal phosphoric acid. Benefits are listed below.1. Phosphorus-containing solids are recycled to smelting furnaces thus eliminating hazardous waste generation.2. Phosphorus furnace feedstock is upgraded and this permits unbeneficiated phosphate ore to be smelted.3. Energy is conserved during manufacture of elemental phosphorus and phosphoric acid.4. Electric energy is produced by cogeneration.5. Fluorine in phosphate ore is recovered as ammonium fluoride.6. Phosphorus-containing liquids are used as feedstock for production of suspension fertilizers.Benefits are achieved by agglomerating phosphate ore with monocalcium phosphate binder by a method which upgrades the ore. Phosphorus-containing solids are fluidized and burned to form an impure phosphoric acid mixture which is reacted with small sized phosphate ore to form monocalcium phosphate binder.

Abstract: Crystalline molecular sieves having three-dimensional microporous framework structures of FeO.sub.2, TiO.sub.2, AlO.sub.2, and PO.sub.2 tetrahedral oxide units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:mR:(M.sub.x Al.sub.y P.sub.z)O.sub.2wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "M" represents iron and titanium, "m" represents the molar amount of "R" present per mole of (M.sub.x Al.sub.y P.sub.z)O.sub.2 ; and "x", "y" and "z" represnt the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is also disclosed.

Abstract: Carbon fibers having balanced properties comprising an ultra-high modulus greater than 100 Mpsi and a high tensile strength of greater than 500 kpsi. The carbon fibers are derived from a solvent fractionated pitch having a mesophase content of greater than 90% by weight and a quinoline insolubles content of less than 1% by weight. A crude pitch feed is sequentially heat soaked, solvent fractionated, and extruded to form as-spun fibers. The latter are stabilized or infusibilized and then carbonized by multistage heat treatments involving separate precarbonization, carbonization, and graphitization steps with an intermediate cooling step.

Abstract: Disclosed is a filler for ink jet recording paper, said filler being composed of amorphous silica having a median diameter, measured by the coulter counter method, of 2 to 15 .mu.m, an oil absorption of at least 180 ml/100 g, a refractive index, measured by the solvent method, of at least 1.450, and a moisture absorption, measured when it is caused to absorb moisture for 200 hours at a relative humidity of 90% and a temperature of 25.degree. C., of at least 35%.

Abstract: A process and apparatus for the recovery of metals such as silver from phosphate flue dust. The process includes the steps of blending chloride salt and the flue dust to produce a blended material, roasting the blended material in an oxygen bearing atmosphere to oxidize carbon in the blended material producing a gas and to react chloride salt with the metal in the blended material producing a water soluble metallic salt, dissolving the metallic salt in water to produce a solution, filtering the solution to remove solids, and precipitating metals from the filtered solution with the precipitate ready for conventional smelting. The preferred embodiment of the apparatus includes a flue dust hopper and mill and a salt hopper and mill for feeding the dust and salt to a radiant tube dryer and a radiant tube asher for blending and roasting the materials, and a spray chamber at the outlet of the asher for separating solids and gases, where certain of the solids go into solution.

Abstract: An improved method for crystallizing amorphous or polycrystalline material is disclosed, which method employs a novel intermediate product. A film of material to be crystallized is formed on a substrate. A porous silica cap is formed over the film. The resultant intermediate product is heated to melt the film which crystallizes upon cooling. Gases generated during melting of the film escape through the porous cap which also functions to prevent deleterious agglomeration of the material while it is in a molten state.

Abstract: A method of enrichment of D.sub.2 O in solutions of D.sub.2 O in H.sub.2 O by contacting said solutions in the steam phase with hexagonal crystalline to produce enriched D.sub.2 O. The passages may be repeated to achieve a desired amount of D.sub.2 O.

Abstract: A process for growing shaped single crystals of refractory optically transparent metal compounds comprising melting a starting stock in an inert gas atmosphere under the effect of heat evolved by a heater; the melt is continuously fed into a crystallization zone through a capillary system of a shaping unit, followed by pulling a single crystal from the crystallization zone and cooling thereof. Prior to melting of the starting stock one control particle thereof is placed into the crystallization zone and at the moment of melting of said particle the heater power P is recorded. Melting of the starting stock is conducted at a heater power of (1.04-1.1)P, fusing of the seed--at a power of (1.03-1.08)P, building-up of the single crystal--at a power of (1.02-1.08)P; pulling--at a power of (1.02-1.22)P.

Abstract: This invention relates to a new form of crystalline silicoaluminophosphate, to a new and useful improvement in synthesizing said crystalline material and to use of said crystalline material prepared in accordance herewith as a catalyst for organic compound, e.g. hydrocarbon compound, conversion.

Abstract: This invention relates to a new form of crystalline metalloaluminophosphate, to a new and useful improvement in synthesizing said crystalline material and to use of said crystalline material prepared in accordance herewith as a catalyst for organic compound, e.g. hydrocarbon compound, conversion.

Abstract: High strength, high modulus carbon fibers derived from high mesophase content pitch, having a plurality of sheets formed of planes of hexagonal carbon networks oriented, in the direction of the fiber axis and having a cross-sectional arrangement which does not carbonize to a graphitic structure are characterized by electron and X-ray diffraction pattern wherein the (10) band is not resolved into (100) and (101) lines, by an interlayer spacing greater than 3.38 angstrom and by negative magnetic resistivity when composed to graphitized fibers.

Abstract: Molecular sieve compositions having three-dimensional microporous framework structures of AsO.sub.2, AlO.sub.2 and PO.sub.2 tetrahedral oxide units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:mR: (As.sub.x Al.sub.y P.sub.z)O.sub.2wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present per mole of (As.sub.x Al.sub.y P.sub.z)O.sub.2 ; and "x", "y" and "z" represent the mole fractions of arsenic, aluminum and phosphorus, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is also disclosed.