Abstract: Anisotropic melts are disclosed which can be shaped, based on aromatic polyesters containing linkages of the arylaliphatic ether type.These melts consist of homopolyesters having units of the formulae: ##STR1## in which n equals 4 or 6 and X=H, Cl or CH.sub.3, with the proviso that when n equals 4, X only represents Cl or CH.sub.3, the flow points of these polymers being between 200.degree. and 340.degree. C. These anisotropic melts make it possible to obtain filaments, films and molded articles possessing good mechanical properties.

Abstract: Heat-stable polyphase polyamido compositions having improved mechanical properties are comprised of (i) from 55 to 99% by weight of a nylon polyamide resin matrix, said polyamide resin having a number-average molecular weight of at least 5,000, and (ii) from 1 to 45% by weight of a particulate disperse phase, said particulates having a particle size ranging from 0.01 to 10.mu., and said disperse phase comprising a polyesteramide having a content in amide groups of less than 40% of the amide groups comprising said polyamide matrix resin and a glass transition temperature of less than 5.degree. C.

Abstract: A device is provided for the leaktight securing of semi-permeable membranes to opposite faces and around each orifice of a membrane support plate of a separatory apparatus which separates by selective permeability. Said device comprises two stamped metal rings which maintain sealing pressure on the membranes against the support plate and are attached to one another in a leaktight fashion by means of a sealing means situated between them. A separatory apparatus comprising support plates fitted with the above device is also provided.

Abstract: Aqueous suspensions of alumina particulates, at least a portion of which comprising ultrafine boehmite, are prepared by maintaining a pH<9 aqueous formulation of poorly crystallized and/or amorphous activated alumina powder for such period of time as to effect the at least partial transformation of such alumina powder into ultrafine boehmite.

Abstract: Random or regularly recurring block polyesteramides having glass transition temperatures at least as low as -30.degree. C. are prepared from (i) essentially difunctional monomers comprising at least one carboxylic acid function, or ester/amide-forming derivative thereof, at least 1 mol % of which comprising dicarboxylic acids or such derivatives thereof and having from 20 to 60 carbon atoms, with the amount of monofunctional carboxylic acids comprising said carboxyl monomers being less than about 1% by weight and the amount of carboxylic acids having in excess of two functional groups being less than about 5% by weight, and (ii) a member selected from the group consisting of dihydroxyl and diamino comonomers therefor, or aminoalcohol comonomers, or mixtures of diamino and aminoalcohol comonomers.

Abstract: The invention provides a process for solubilizing an organic or mineral salt in an organic solvent, said process comprising contacting an organic or mineral salt of the formula A.sup.- M.sup.+, wherein A.sup.- represents a mineral or organic anion and M.sup.+ represents a cation selected from the group consisting of the cation NH.sub.4.sup.+ and its derivatives and the cations derived from the metals of the groups I.sub.A, II.sub.A, III.sub.A, IV.sub.A, V.sub.A, VI.sub.A, VII.sub.A, VIII, I.sub.B, II.sub.B, III.sub.B, IV.sub.B and V.sub.B of the periodic table, with at least one sequestering agent which is soluble in said organic solvent, said sequestering agent having the formula:N[CHR.sub.1 --CHR.sub.2 --O--(CHR.sub.3 --CHR.sub.4 --O).sub.n --R.sub.5 ].sub.3 (I)wherein n is an integer from 0 to 10 inclusive; R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which can be the same or different, are each a hydrogen atom or an alkyl radical having 1 to 4 carbon atoms; R.sub.

Abstract: A coating or molding composition including a polyisocyanate and an unsaturated imide, and having a ratio of total isocyanate functions to total polymerizable double bonds in the imide in the range of from 0.3 to 15, is addition polymerized to hard, imide group containing polymers characterized by the recurring unit: ##STR1## Coatings and shaped articles formed from such polymers are hard, tough, thermally stable, solvent resistant and are good insulators.

Abstract: A coating or molding composition including a polyisocyanate and an unsaturated imide, and having a ratio of total isocyanate functions to total polymerizable double bonds in the imide in the range of from 0.3 to 15, in addition polymerized to hard, imide group containing polymers characterized by the recurring unit: ##STR1## Coatings and shaped articles formed from such polymers are hard, tough, thermally stable, solvent resistant and are good insulators.

Abstract: The invention relates to a process for the recovery and the concentration of uranium (VI) contained in an organic phase. The organic phase is treated continuously in a contact zone with an aqueous solution containing an oxidizing-reducing agent in the reduced state, said oxidizing-reducing agent being capable of reducing U.sup.+6 to U.sup.+4 in said aqueous solution. The aqueous solution employed in the process issues in part or in its entirety from the cathodic compartment of an electrolytic separation cell, which is under a direct current potential, and the aqueous phase issuing from the contact zone feeds in part or in its entirety the anodic compartment of the electrolytic cell. The process is of particular interest when applied to the recovery and concentration of uranium contained in a wet process phosphoric acid.

Abstract: A settable molding composition comprising a mix of synthetic plaster with an extraneous water source, including a "wet" synthetic gypsum or a mixture of same and free water, is readily pressure compacted or molded into a plurality of useful shaped articles, e.g., strong, modular building materials. The plaster can comprise from about 30% to about 99% by weight of the mix and has a Blaine surface area ranging between 2,500 and 7,000 cm.sup.2 /g, with the amount of water in the mix from the water source being in excess of that amount stoichiometrically required for ultimate complete setting of the mix, said excess of water being in an amount no greater than 15% of the total weight of said mix. The resulting shaped articles are effectively set, even in the absence of any drying step.

Abstract: Novel polyester for the packaging of perishable comestibles, e.g., as bottles for still or carbonated mineral waters, is a poly(ethylene glycol)terephthalate (PET) having an intrinsic viscosity ranging from 0.65 to 1.05 dl/g and a density of more than 1.38, comprising 92.5 to 98.5% of ethylene terephthalate recurring units and 1.5 to 7.5 mol % of recurring units of at least one polybasic acid and/or polyhydric alcohol comonomeric crystallization retardant, the di- and/or triethylene glycol content thereof being less than about 3.5 mol % per mol of diacid radicals present in the polymer chain, said PET also having a residual acetaldehyde concentration of less than 1.25 ppm, with acetaldehyde being reformed therefrom at a rate of less than 5 ppm/hour, at 220.degree. C., and said PET being devoid of visible crystallization in an at least 4 mm thick test plate shaped in a mold cavity from a melt thereof.

Abstract: Process for the preparation of magnetic beads of vinylaromatic polymers, which comprises dispersing a magnetic filler in a solution of a homo- or co-polymer in a vinylaromatic compound alone or in mixture with a co-polymerizable monomer, putting the resulting dispersion into suspension in water and polymerizing the monomer or monomers, and use of said magnetic beads in the paints, inks, reprography and in biology.

Abstract: Solid, bisphenol F particulates are prepared by first dispersing droplets of bisphenol F in a chemically inert liquid medium having a boiling point in excess of 70.degree. C. and having a temperature of at least 70.degree. but less than the boiling point thereof, said liquid medium being maintained in a state of dispersing agitation, and then cooling the dispersion which results, while continuing to maintain said state of agitation, to a temperature such as to solidify the dispersed droplets of said bisphenol F into solid particles.

Abstract: Process for purifying beet juice by contacting the juice to be purified with at least two ion exchangers formed of a porous mineral support covered with a film of cross-linked polymer containing or bearing quaternary ammonium salt groups for at least one of the ion exchangers and sulfone groups for at least one of the other ion exchangers.

Abstract: Masterbatches useful for lightweight polyamide molding or extrusion comprise polyamide, a pore-forming agent and a fusible binder that is compatible with the polyamide. Admixture of the masterbatch and granular polyamide polymer results in a polyamide composition which can be molded or extruded into a product having increased homogeneity and expansion uniformity.

Abstract: Crude wet-process phosphoric acid prepared by mineral acid acidulation of uncalcined phosphate rock and containing contaminating amounts of organic impurities is purified and decolorized into an essentially colorless food-grade phosphoric acid, by (i) preliminarily decolorizing such crude acid, (ii) liquid-liquid extracting said predecolorized acid with an essentially water-insoluble organic extractant, (iii) back-extracting the extracted phosphoric acid with an aqueous phase, (iv) concentrating the back-extracted aqueous phosphoric acid solution at elevated, coloration-developing temperatures, and (v) then subjecting the concentrated solution which results to a final decolorization, to afford a purified, essentially colorless phosphoric acid solution.

Abstract: Solid particulate lysine-containing compositions which do not agglomerate in the presence of atmospheric moisture are obtained by mixing a concentrated lysine fermentation broth with an inorganic additive selected from (i) lime in conjunction with carbon dioxide, (ii) magnesium carbonate, or (iii) a mixture of (i) and (ii), and forming solid particles of the resulting mixture. The compositions obtained are suitable for addition to animal feed.

Abstract: Process for preparing anion exchange resins comprising polymerizing a vinyl aromatic compound having at least one alkyl group containing about 1 to 3 carbon atoms, alone or mixed with a copolymerizable monomer, optionally in the presence of a mineral support, followed by brominating the alkyl groups of the resulting polymer by means of an N-bromoamide or an N-bromoimide, and then aminating the brominated product obtained. The resulting anion exchange resins are useful in the chemical, pharamaceutical, food, and metallurgical industries.

Abstract: Compounds of the formula: ##STR1## wherein A represents pyrid-2-yl, quinol-2-yl or 1,8-naphthyridin-2-yl, each such radical being optionally substituted by a halogen atom, or an alkyl or alkoxy radical of 1 through 4 carbon atoms, and R represents hydrogen, an alkyl radical of 1 through 4 carbon atoms, an alkenyl radical of 2 through 4 carbon atoms or an alkanoyl radical of 1 through 4 carbon atoms, are new compounds possessing pharmacological properties. They are particularly active as tranquillizers, anti-convulsants, decontracturants and hypnogenic agents.

Abstract: Intimate and efficient contacting of plural, physically disparate phases, e.g., a gas and a liquid, is achieved by contacting the phases cocurrently in a column. The gas phase is introduced at a velocity between its phase transition inversion point (T) and multiple critical point (M.sub.c) velocities, which velocity is sufficient to create a dispersion of the second phase, i.e., the liquid phase, in the gas and thereby establish at most the following zones, from bottom to top, in the column: a bottom zone of constant liquid concentration designated the emulsion zone, a zone of decreasing liquid concentration, and a zone of constant liquid concentration wherein the liquid exists in the form of droplets. The feed velocity of the liquid is adjusted accordingly to provide a mass liquid concentration value in the emulsion that is between the mass liquid concentration value transition inversion point and multiple critical point values.