Abstract: A process for isolating a conjugated diolefin from a C.sub.4 - or C.sub.5 -hydrocarbon mixture containing the diolefin, by single-stage or multi-stage extractive distillation using a selective solvent, wherein the selective solvent is a solvent mixture which comprises(a) from 50 to 99 percent by weight of a selective solvent boiling at from 140.degree. C. to 260.degree. C. and(b) from 1 to 50 percent by weight of an organic solvent boiling at from 45.degree. C. to 125.degree. C.

Abstract: A process for the manufacture of magnetic recording media, comprising a non-magnetic base and, applied thereto, one or more magnetizable layers, consisting of an anisotropic magnetic material finely dispersed in an organic binder, wherein the binder contains at least 40% of an aqueous ionomeric polyurethane dispersion which at 50.degree. C. forms films having a modulus of elasticity of from 50 to 700 N/mm.sup.2 and a DIN No. 53,157 pendulum hardness of from 20 to 110 s, the corresponding values of the modulus and hardness at room temperature being more than 3.5 times higher.

Abstract: A process for the preparation of butanedicarboxylic acid esters, wherein(a) an aqueous cobalt salt solution is treated with excess carbon monoxide and hydrogen in the presence of active charcoal laden with cobalt carbonyl,(b) the resulting aqueous solution of cobalt carbonyl hydride is extracted with butadiene or a butadiene containing hydrocarbon mixture and the aqueous phase is separated off,(c) the butadiene, or butadiene/hydrocarbon mixture, containing cobalt carbonyl hydride, cobalt carbonyl and butenyl-cobalt tricarbonyl, is reacted with carbon monoxide and excess C.sub.1 -C.sub.4 -alkanol in the presence of a tertiary nitrogen base,(d) the resulting reaction mixture is freed from the tertiary nitrogen base contained therein, down to a content of from 0.1 to 0.3 mole per mole of pentenoic acid ester, and from excess hydrocarbons, and the pentenoic acid ester remaining in the reaction mixture is reacted with carbon monoxide and excess C.sub.1 -C.sub.

Abstract: Positioner for the scanning head, mounted on a carriage, in a recording and/or playback apparatus for disk records, with a cable extending between the carriage and the drive motor, and a spring as counterforce, which positioner comprises a pulley, mounted on the carriage, and two pulleys of different diameter which are mounted on the shaft of the drive motor and to which the beginning and end of the cable are fixed, the pulley system operating on the differential pulley principle, so that greater accuracy of positioning is achieved and less torque has to be produced by the motor.

Abstract: The binders are reaction products of (A) adducts of ammonia or diamines and epoxide compounds with (B) partially or fully blocked diisocyanates or polyisocyanates, with or without (C) diamines or polyamines, the amino-.beta.-hydroxyalkyl groups of component (A) preferably having been reacted--prior to their reaction with component (B)--with a carbonyl compound, preferably an aldehyde, to form an oxazolidine ring. The reaction products are ultimately protonized with an acid.These binders are used for the cathodic electrocoating of metallically conductive articles.

Abstract: A mixture of phenothiazine and para-nitrosophenol is a particularly effective stabilizer against premature polymerization of monomeric esters of acrylic acid with alkanols of 1 to 8 carbon atoms.

Abstract: This invention relates to a method for producing a pigment-organic vehicle product which comprises forcing an aqueous pulp of the pigment through a conduit and injecting the vehicle into the conduit and aqueous pulp. The mixture is then homogenized, subjected to further mixing and transferred to a traveling horizontal perforated surface whereby some of the water drains from the mixture through the perforations. The aqueous pulp, organic vehicle mixture is then forced through a cylindrical chamber having defined therein an axial opening of a diameter smaller than that of the chamber, and at least one second opening spaced from the axial opening. The mixture is forced through the chamber and axial opening by a rotating helical surface whereby the product is extruded through the axial opening and water is squeezed from the mixture. The water then exits from the chamber through the second opening.

Abstract: In the method for transferring an organic pigment from an aqueous pulp to a water-immiscible hydrophobic organic vehicle the improvement to achieve low initial viscosity, good shelf stability, and good tint strength comprising incorporating an additive selected from the class of sulfonated sperm oil, sulfated sperm oil and mixtures thereof with said vehicle and said pigment.

Abstract: Machine dishwashing detergents are disclosed containing a low-foaming nonionic surfactant having relatively low cloud point which unexpectedly provides effective detergency and foam control when utilized as the sole nonionic surfactant. Dishes and other utensils are cleaned to a sparkling clean spot-free condition by the machine dishwashing detergent compositions of the invention containing conventional phosphate builders or non-phosphate builders but excluding conventional alkyl phosphate ester defoaming agents. The machine dishwashing detergent compositions of the invention are effective on dishes and other utensils encrusted with soils comprising egg and other milk-derived protein soils.

Abstract: Herbicides based on an aqueous suspension of from 20 to 50 percent by weight of 1-phenyl-4-amino-5-chloro-pyridaz-6-one or 1-phenyl-4-amino-5-bromo-pyridaz-6-one, from 2 to 10 percent by weight of dispersant, from 0.5 to 5 percent by weight of silica and from 0.5 to 5 percent by weight of a block polymer of propylene glycol, propylene oxide and ethylene oxide, which additionally contain a thiolcarbamate, a chloroacetanilide or a 2,6-dinitroaniline, the weight ratio of pyridazone to thiolcarbamate, chloroacetanilide or 2,6-dinitroaniline being from 4:1 to 1:2, a process for their preparation, and their use for combating undesired plant growth.

Abstract: Novel aminopropanol derivatives of 5-(2-hydroxystyryl)-isoxazole and their addition salts with acids, their preparation, pharmaceutical formulations containing these compounds, and their use in the treatment of hypertonia, coronary heart disease and cardiac arrhythmias.

Abstract: Polymer polyol dispersions are prepared by reacting polyepoxides with epoxide resin hardeners in the presence of polyester and polyoxyalkylene polyether polyols.

Abstract: A process for dyeing and printing cellulose-containing textile material, wherein the dye used is a compound of the general formula I ##STR1## where K is the radical of a coupling component of the pyridone, pyrazole or indole series,one of the radicals X, Y and Z is a carboxylic acid ester group of a total of 2 to 19 carbon atoms, a carboxamide group of a total of 1 to 19 carbon atoms, an unsubstituted or substituted sulfonic acid phenyl ester group or a sulfonamide group of a total of 6 to 18 carbon atoms, andthe remaining substituents X, Y and Z are hydrogen, methyl, chlorine, bromine or nitro.

Abstract: A process for the manufacture of salts of alkanedicarboxylic acids of 4 to 12 carbon atoms and alkanediamines of 3 to 14 carbon atoms, comprising reacting esters of alkanols of 1 to 4 carbon atoms and alkanedicarboxylic acids of 4 to 12 carbon atoms with alkanediamines of 3 to 14 carbon atoms in stoichiometric amounts in the presence of water at an elevated temperature, with continuous removal of the alkanols formed, in which process the reaction is carried out, from the start, in the presence of the particular salt of alkanedicarboxylic acid and alkanediamine which is to be manufactured.

Abstract: A coated catalyst comprising (a) an inert carrier having particles of not less than 100 .mu.m diameter and a surface area of up to 20 m.sup.2 /g and (b) a coating which contains the catalytic material and adheres firmly to the outer surface and to the edge zone, near the surface, of the carrier particles, can be prepared by applying the catalytic material as a 10-70% strength suspension in water to the agitated carrier particles, which are at below 70.degree. C., if the suspension is sprayed, at a constant rate of from 0.01 to 2.0 kg of active material/hour/liter of carrier onto the carrier particles, while at the same time uniformly passing from 0.1 to 12 m.sup.3 (S.T.P.)/hour/liter of carrier of an inert gas at from 20.degree. to 300.degree. C. over the carrier particles, under conditions such that the water only evaporates incompletely but the water content of the resulting coating is less than the maximum degree of saturation of the catalytic material.

Abstract: A mixture of an alkyl 3-chloroanthranilate and an alkyl 6-chloroanthranilate, with a particular molar ratio of the components, is prepared by (a) reacting 3-chlorophthalic anhydride with ammonia, an alkali metal hydroxide and an alkali metal hypochlorite or (b) converting 3-chlorophthalic anhydride to 3-chlorophthalimide followed by reaction of the latter with an alkali metal hydroxide and an alkali metal hypochlorite, and, finally, esterifying the mixture of 5-chloroisatoic anhydride and 8-chloroisatoic anhydride, obtained by method (a) or method (b), with an alkanol.The compounds obtainable by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents and scents.

Abstract: A process for the preparation of pure optically active tertiary phosphines by resolving the corresponding racemic compounds, whereinthe phosphines are first converted to the corresponding phosphine oxides in a conventional manner,the resulting racemic mixtures of the phosphine oxides are reacted in organic solution, in accordance with the principles of enantiomer separation via stereomeric compounds, with an optically pure isomer of a tartaric acid which is mono-acylated or bis-acylated at the alcoholic hydroxyls,the diastereomeric compound which is less soluble in the solvent is separated off,the tartaric acid derivative is split off from the resulting pure diastereomeric compound by means of a base andthe resulting optically pure or substantially optically pure phosphine oxides are reduced back to the phosphines in a conventional manner.

Abstract: A process for obtaining the enantiomeric forms of 4-cyano-1-[N-methyl-N-(2'-{3",4"-dimethoxyphenyl}-ethyl)-amino]-5-methyl-4 -(3',4',5'-trimethoxyphenyl)-hexane and of its salts, in which the acid salt of the compound with an optically active form of O,O'-dibenzoyltartaric acid is first prepared, as a diastereomer mixture, by neutralizing the free base or by double decomposition of another salt of the compound, and the mixture is then separated by crystallization. Thereafter, the pure diastereomers thus obtained are converted to the free bases of the enantiomeric forms, or to salts thereof, in a conventional manner.

Abstract: Alkylaminopropanol derivatives of 2-methyl-5-(2-hydroxystyryl)-1,3,4-thiadiazole and their addition salts with acids, their preparation, and pharmaceutical formulations, containing these compounds, which may be used for the treatment of coronary diseases of the heart, of hypertonia and of cardiac arrhythmias.

Abstract: An apparatus for guiding a span of high-speed magnetic recording tape past a recording/transducing head. Low volume pressurized air is utilized to lift the tape off of the guide assembly thereby eliminating sliding friction between the apparatus and the tape. The periphery of the guide is provided with a means to facilitate the formation of an air seal with the edges of the tape thereby substantially isolating the pressurized air from the atmosphere. Air jets are provided at the tangent points where the tape enters and departs from the air guide so as to prevent the tape from touching any portion of the guide during the transport operation. The pressurized air emitted from the air jets located at the tangent point where the tape enters the guide forms a supporting boundary layer of air along the surface of the tape which is carried along by the tape across the guide.