Abstract: An antibiotic product is comprised of at least three delayed release dosages forms, each of which has a different release profile, with the Cmax for the antibiotic product being reached in less than about twelve hours.

Abstract: An apparatus for producing phenol and acetone from cumene hydroperoxide comprises a reactive distillation column comprising at its upper portion a distillation column and at its lower portion a catalyst bed.

Abstract: A catalyst composition comprising a) more than 70% by weight of a polyethylene glycol of the formula H—(OCH2—CH2)n—OH, where n is an integer of 3 to 16 and the number average molecular weight is less than 650 b) rhodium in elemental form or bound form and c) 2 to 25% by weight of water soluble sulfonated triarylphosphine ligand having 1 to 2 phophorus atoms and not more than 25% by weight of water based on the total amount of the catalyst and its use for the hydroformylation of olefins to aldehydes is described.

Abstract: A process for preparing polymerizable biaryl derivatives comprises reacting an aromatic comprising a 6-membered ring which bears ester or benzylic OH groups in the 1,4 position with a second aromatic in a palladium-catalyzed cross-coupling reaction to give a biaryl and converting the ester or benzylic OH groups into polymerizable groups in one or more steps. The biaryls obtained are suitable for preparing polymers which are used as electroluminescence materials.

Abstract: Novel modified and improved beta-diketones and their use in the extraction of copper from aqueous ammoniacal solutions containing copper values, resulting from commercial processes, including, but not limited to, leaching of copper containing ores, such as sulfidic ores, or concentrates resulting from flotation of such sulfidic ores. The novel diketones are those highly sterically hindered, which may be represented by the formula I or II: ##STR1## The preferred beta-diketones of Formula [II] are selected from the group consisting of neo-alkyl beta-diketones, such as, 1-phenyl-3-neoalkyl-1,3 propanedione in which the neoalkyl group is selected from neohexyl, neoheptyl, neooctyl, neononyl, or neodecyl.

Abstract: This invention relates to a process for the production of tetrabromobisphenol-A by the bromination of bisphenol-A, which process features the addition of bisphenol-A to a reaction mass containing unreacted Br.sub.2 and 30 to 85 wt. % water and an alcohol solvent, the reaction mass being at a relatively high temperature.

Abstract: The present invention is concerned with a process for the catalytic hydrogenation of organic compounds on a catalyst of amorphous metal alloys and in a solvent, with the hydrogenation being carried out under near-critical or supercritical conditions of the solvent. The amorphous metal alloys can be produced by the shock cooling of alloy melts having eutectic solidification points. By hydrogenation at hydrogen partial pressures between 5 and 400 bar there is obtained outstanding space-time yields with high long-term stability of the catalytic activity.

Abstract: A method for the preparation of a fluorinated ketone of the formula: ##STR1## where R.sub.1 and R.sub.2 are independently fluorine, alkyl of from about 1 to about 8 carbon atoms, fluoroalkyl of from about 1 to about 8 carbon atoms, or ##STR2## where R.sub.3 and R.sub.4 are independently fluorine, alkyl of from about 1 to about 8 carbon atoms, or fluoroalkyl of from about 1 to about 8 carbon atoms and n is 0 or 1. The method includes heating an anhydride of the formula: ##STR3## with a catalyst including a cationic salt of a fluorocarboxylic acid or an alkali metal fluoride to obtain the fluorinated ketone.

Abstract: A method wherein a gas stream containing a methyl mercaptan is passed in contact with a catalyst comprising a supported metal oxide or a bulk metal oxide in the presence of an oxidizing agent and for a time sufficient to convert at least a portion of the methyl mercaptan to formaldehyde (CH.sub.2 O) and sulfur dioxide (SO.sub.

Abstract: This invention provides a method for thermally converting volatile fatty acid (VFA) salts to ketones by mixing dry calcium salts of VFAs with hot heat transfer agent in an evacuated container, thereby causing thermal decomposition of the calcium salts of VFAs to form ketone-containing vapor and calcium carbonate; and separating the ketone-containing vapor from the calcium carbonate and heat transfer agent by condensing a mixture of ketones from the ketone-containing vapor.

Abstract: Acrolein-releasing emulsion homopolymers release acrolein in aqueous systems. They are produced by adding acrolein, at least 95% by weight pure, to a solution of an alkali hydroxide, with the temperature not exceeding 25.degree. C. during the addition, and then adjusting the pH to 5 to 7 by adding a mineral acid.

Abstract: A process for producing aromatic aldehydes by carbonylation of an arene in the presence of triflic acid catalyst is described by reacting an arene, such as toluene, with carbon monoxide in the presence of triflic acid (as a catalyst), for a reaction time less than 90 minutes, at a carbon monoxide partial pressure of about 700-2000 psig, at a temperature of from about 0-50.degree. C. to produce an aromatic aldehyde such as tolualdehyde and by-products, the by-products being less than 5% by weight based on the total reaction products.The mole ratio of triflic acid to arene is between about 0.8 to 20, with the reaction having an isomer selectivity greater than 95% by weight for the para isomer aldehyde, and showing substantially no meta isomer.

Abstract: The present invention relates to a process for the preparation of benzophenone derivatives and comprises a selective crystallization of alkali salts of compounds of formula (I) ##STR1## wherein R.sup.1 is lower-alkyl and R.sup.2 is hydrogen, lower-alkyl or halogen,from the isomeric alkali salts of the 3-hydroxy compounds of formula (II), ##STR2## wherein R.sup.1 and R.sup.2 are as defined above.

Abstract: This invention relates to a process which comprises reacting one or more reactants in the presence of a metal-organopolyphosphorus ligand complex catalyst and optionally free organopolyphosphorus ligand to produce a reaction product fluid comprising one or more products, wherein said process is conducted at a carbon monoxide partial pressure such that reaction rate increases as carbon monoxide partial pressure decreases and reaction rate decreases as carbon monoxide partial pressure increases and which is sufficient to prevent and/or lessen deactivation of the metal-organopolyphosphorus ligand complex catalyst.

Abstract: This invention relates to a process for separating one or more phosphorus acidic compounds from a reaction product fluid containing said one or more phosphorus acidic compounds, a metal-organophosphorus ligand complex catalyst and optionally free organophosphorus ligand which process comprises treating said reaction product fluid with an aqueous buffer solution sufficient to neutralize and remove at least some amount of said one or more phosphorus acidic compounds from said reaction product fluid.

Abstract: 2-Chloro-4-methylphenol is prepared by reacting 4-methylphenol with a chlorinating agent in the presence of a catalyst system of one or more Lewis acids in a total amount of 0.1-10% by weight and one or more diaryl sulphides in a total amount of 0.1-10% by weight, all based on the amount of 4-methylphenol. The reaction temperature is 0.degree.-100.degree. C. The chlorinating agent is used in an amount of 0.5-1.5 mol per mole of 4-methylphenol. The reaction can be carried out until virtually complete consumption of the 4-methylphenol, high isomeric selectivity and high stage selectivity being observed.

Abstract: An amount of water is added to a glycol solution to be purified to enable segregation of the resulting mixture into a hydrocarbon phase and a glycol phase. The hydrocarbon phase is separated from the glycol phase and said glycol phase is desalted, e.g. by electrodialysis, to give a desalted and substantially hydrocarbon-free glycol solution which is then concentrated by steam stripping. The method is useful for purifying waste glycol solutions resulting from oil or gas production effluent processing using glycols, and in particular from a gas hydrate inhibition treatment or natural gas dehydration.

Abstract: The invention relates to a method for conversion of methanol, ethanol alone or in combination with n-propanol to the corresponding isoalcohols by contacting a catalyst of a noble metal supported on at least a first phase of mixed oxide crystallites containing from about 60 to about 74 atomic % (on a metals basis only) zirconium, from about 21 to about 31 atomic % manganese and from about 5 to about 9 atomic % zinc, and less than about 1 atomic % alkali, a second phase of zirconium-doped hetaerolite particles containing from about 65 to about 69 atomic % manganese, from about 31 to about 35 atomic % zinc, from about 0.5 to about 5 atomic % zirconium, and optionally a trace atomic % of alkali, and a third phase containing from about 29 to about 55 atomic % manganese, from about 13 to about 55 atomic % zinc and from about 13 to about 35 atomic % zirconium, wherein the first phase mixed oxide crystallites have a zirconium oxide-like structure have a particle size of at least about 40 .ANG. to about 100 .ANG.

Abstract: Hydroxybenzaldehydes, for example salicylaldehyde, are prepared in high yields by oxidizing the corresponding hydroxybenzyl alcohols, e.g., saligenol, with molecular oxygen or an oxygen-containing gas, in liquid phase, in an aqueous reaction medium containing an alkali, in the presence of (i) a catalytically effective amount of a platinum catalyst and (ii) a cocatalytically effective amount of boron and bismuth compounds.

Abstract: Methyl tertiary butyl ether is prepared from contaminated tertiary butyl alcohol and methanol by decomposing peroxides in a peroxides decomposition reactor, by dehydrating the tertiary butyl alcohol to form isobutylene and also decomposing acidic contaminants in a tertiary butyl alcohol dehydration reactor to form a feedstock that is distilled to provide a first lower boiling fraction comprising isobutylene and water; from which isobutylene is recovered for reaction with methanol in an etherification reactor containing a bed of an etherification catalyst to form methyl tertiary butyl ether.