Abstract: A method for producing high purity silica and ammonium fluoride from silicon tetrafluoride-containing gas wherein silicon tetrafluoride-containing gas from the acidulation of phosphorus-containing rock is recovered and the liquid entrainment is separated from the gas. The recovered gas is converted to an ammonium fluosilicate solution and is ammoniated to produce high purity silica and ammonium fluoride. The recovered gas can be converted to an ammonium fluosilicate solution either by absorbing the gas directly in a solution of ammonium fluoride or by first absorbing the gas in water to produce fluosilicic acid and then reacting the fluosilicic acid with ammonia or ammonium fluoride.

Abstract: A process for the production of silicon in a low-shaft electric furnace, in which raw-material blanks are first formed which contain fine-grain silicon dioxide, e.g. in the form of sand, and carbon in excess in respect of the reduction to silicon carbide and the raw-material blanks are introduced into the low-shaft furnance as a charge in mixture with silicon dioxide in lump form. The silicon dioxide in the raw-material moldings is reduced to silicon carbide in an upper part of the low-shaft electric furnace at a temperature of below 1600.degree. C. and coke structure agglomerates are formed from the excess carbon of the raw-material moldings. In a lower part of the low-shaft electric furnace, the silicon dioxide in lump form, is reduced to silicon with silicon carbide and carbon from the coke structure agglomerates at a temperature of above 1600.degree. C., preferably from 1800.degree. to 200.degree. C. The raw-material moldings are formed with bituminous binder containing a fine-particle silica powder.

Abstract: Slurries of pentaerythritol in a liquid oil in which pentaerythritol is substantially insoluble are disclosed. The slurries can contain up to 70 percent by weight or more of solid pentaerythritol. Suitable oils include propylene glycol, ethylene glycol, vegetable oils, glycerin and tall oil fatty acid. The slurries are stable and flowable allowing for shipment in bulk.

Abstract: An inorganic cement binder for a foundry aggregate comprising, in combination, potassium olivine phosphate and as a hardener therefor, water, aqueous sodium silicate, or aqueous phosphoric acid.

Abstract: Zinc complexes of glycolic monovalent monoglycoside polyether antibiotics are provided for use as coccidiostats and growth-promoting agents when administered to poultry and for use as active agents for improving cardiovascular function in animals.Zinc complexes of the type disclosed can be prepared by adding soluble zinc salt to a fermentation beer containing the glycolic monovalent monoglycoside polyether antibiotic to thereby form an insoluble, recoverable biomass containing the desired zinc antibiotic complex.

Abstract: A particulate filter medium for collecting finely dispersed particles from a circulating gas stream. The filter medium comprises a gas flow zone consisting essentially of gas permeable particles of the same material as the finely dispersed solid particles to be collected. The finely dispersed particles are generated by granular product blending operations of dry granular materials such as fertilizers, chemicals, animal feeds and clays.A substantial saving in filter material renewal costs is realized by adding the spent filter medium to the product stream, and simply replacing the spent filter medium with fresh, granular particles of the product having a capacity to collect finely dispersed solid particles from the circulating gas stream.

Abstract: Uranium values are recovered as uranyl peroxide from wet process phosphoric acid by a solvent extraction-precipitation process. The preferred form of this process comprises a first solvent extraction with DEPA-TOPO followed by reductive stripping of the extractant with Fe.sup.++ - containing phosphoric acid. After reoxidation, the uranium-containing aqueous stripping solution is extracted again with DEPA-TOPO and the pregnant organic is then stripped with a dilute ammonium carbonate solution. The resulting ammonium uranyl tricarbonate solution is then acidified, with special kerosene treatment to prevent wax formation, and the acidified solution is reacted with H.sub.2 O.sub.2 to precipitate a uranyl peroxide compound.

Abstract: A method of catalyzing the curing of polyurethane foams formed by reacting a polyol with a diisocyanate in the presence of a blowing agent and a catalyst comprising using as the catalyst a compound of the formula ##STR1## where n is 0 or 1, R is methyl or ethyl and R' is hydrogen, methyl of dimethylamino.

Abstract: Solvent extraction of metallic mineral values from aqueous acidic solutions is improved by introducing a fine dispersion of air bubbles into the acid-extractant mixture to cause solid material normally occurring at the phase interface to float to the surface. This improved process is particularly applicable to the extraction of uranium from wet process phosphoric acid.

Abstract: Phosphoric acid is purified by a process which comprises treating the crude acid solution with a body feed agent and a flocculating agent to cause a portion of the impurities to settle out, and contacting the partially clarified acid with activated carbon for further impurity removal. In the preferred process, hot wet process phosphoric acid from the plant filter is first cooled to a temperature of from about 100.degree. F. to about 130.degree. F. and then treated in the above-described manner.

Abstract: A resinous product comprising a curable urea-formaldehyde resin modified by a nitroalkanol and having particular utility for treating textiles and non-woven cellulose products to provide permanent press and wrinkle-resistant characteristics.

Abstract: A process for the synthesis and separation of the threo and erythro isomers of 2-amino-1-phenyl-1-propanol comprising the steps of catalytically reducing 2-nitro-1-phenyl-1-propanol to form the acetate salt of the racemic mixture of 2-amino-1-phenyl-1-propanol and separating the isomers by fractional crystallization.

Abstract: Nitro-olefin-substituted quinoxaline dioxides represented by the formula: ##STR1## where R is hydrogen or methyl. The compounds are useful for controlling the growth of bacteria and fungi.

Abstract: A compound useful for treating disorders of the heart is disclosed having the formula ##STR1## or pharmaceutically-acceptable salts thereof, wherein x is an integer from 1 to about 10, and R.sub.1 is selected from the group consisting of lower alkyl of from 1 to about 5 carbon atoms.

Abstract: A method of controlling the growth of microorganisms by using a compound represented by the formula ##STR1## wherein R is hydrogen or methyl, R.sup.1 is hydrogen, methyl or ethyl, or R and R.sup.1 can collectively be a cyclic alkyl group of 5 carbon atoms.

Abstract: Mineral ore pellets substantially devoid of water are disclosed which contain particles of mineral ore and an alkali metal carbonate. A method for making such pellets is also disclosed which includes mixing particulate mineral ore with an alkali metal carbonate and water to form a plastic mass, forming the plastic mass into pellets, and heating the pellets to drive off the water and provide relatively hard, moisture resistant pellets.

Abstract: Compounds of the following formula and a method for their preparation are disclosed: ##STR1## wherein Ar is substituted or unsubstituted phenyl, R, R' and R" may be similar or dissimilar and are each selected from the group consisting of lower alkyl of from 1 to about 5 carbon atoms. The compounds of this invention are useful as antimicrobial agents.

Abstract: A method is disclosed for beneficiating a phosphate ore matrix containing apatite, siliceous gangue, and an alkaline earth metal carbonate mineral impuritywhich includes the steps of washing and sizing the ore, subjecting it to a gravity separation, a conventional "double float" flotation, and a phosphate-carbonate flotation separation to provide a phosphate ore concentrate having a high BPL content and a relatively low concentration of alkaline earth metal carbonate mineral impurity.

Abstract: A high solids resinous product obtained by the process comprising reacting an unsaturated aliphatic monocarboxylic acid, one or more aromatic dicarboxylic acids or anhydride thereof, a mixture of bis- and tris(hydroxy)-alkanes and a monohydric alcohol, in the presence of catalytic amounts of dibutyl tin oxide and a solvent at a temperature of up to 430.degree. F. until the acid value is less than about 3.0, said resinous product having a non-volatile content of about 90% and a Gardner viscosity about Z.sub.1.

Abstract: A foundry core composition of foundry aggregate, a polyol component or mixture thereof, a polyisocyanate, and as a selected solvent therefor, an acetal or ketal such as butyl acetal. The compositions are suitable for use in cold box, no-bake, and rapid no-bake processes.