Abstract: Dehalogenation of hydrocarbon oils contaminated with haloorganic compounds is carried out by treatment with alkali or alkaline earth alcoholates (MOR) at 120.degree.-400.degree. C., wherein the alcoholates are soluble in the oils under the reaction conditions.

Abstract: A polyurethane coating composition comprising:(a) a synthetic organic polymer containing at least two hydroxyl groups,(b) a polyisocyanatoisocyanurate having the formula: ##STR1## wherein the R groups may be the same or different and are selected from the group consisting of divalent hydrocarbon radicals having the formulas: ##STR2## and n represents a whole or a fractional number from 1 to 5, and (c) optionally, conventional auxiliary agents selected from the group consisting of solvents, dispersing agents, pigments, fillers, and spreading agents, can be subjected to cold or hot curing, and provides a cured coating composition having good resistance to thermal oxidation, good solvent resistance and good mechanical film properties.

Abstract: The invention relates to thermoplastic materials having the following components:(a) 5-85 parts by weight of a melted or remelted preforming material comprising(i) 60-98 parts by weight of a polyphenylene ether,(ii) 40-2 parts by weight of a polyoctenylene, and(iii) 1-7.5 parts by weight of bicyclo [2.2.2]-2,3:5,6-dibenzooctadiene-2,5-dicarboxylic acid-7,8-anhydride, and(b) 95-15 parts by weight of a polyamide comprising an aliphatic homopolyamide or a copolyamide and optionally(c) polystyrene resins, flame protection agents, and other additives, and to a method for their manufacture.

Abstract: The invention relates to a process for producing aromatic polyamides by melt condensation of(i) aromatic diamines of the formulaH.sub.2 N--Ar'--X--Ar"--Y--Ar"--X--Ar--NH.sub.2where X=--O-- and Y=--SO.sub.2 -- or X=--SO.sub.2 -- and Y=--O-- and Ar' and Ar"=meta-, para-phenylene, which can be replaced up to 70 mole percent by an aromatic diamine of the formulaH.sub.2 N--Ar--((Z)q--Ar).sub.r --NH.sub.2where Ar=meta-- or para-phenylene; Z=--O--, --S--, --SO.sub.2 --, --CO--, or --C(CH.sub.3).sub.2 -- or mixtures thereof; q=0 or 1; r=0, 1 or 2 and of(ii) isophthalic acid, which can be replaced up to 60 mole % by terephthalic acid, while both acids can be substituted for by an acid with the formula ##STR1## or a dicarboxylic acid with the general formulaHO.sub.2 C--Ar--(A--Ar).sub.p --CO.sub.2 H,where A=--O--, --S--, --SO.sub.2 --, --CO-- or a single bond; and p=0 or 1; in the presence of triphenylphosphite or an acid with the formula H.sub.3 PO.sub.n, where n=2, 3 or 4.

Abstract: The invention relates to a process for introducing gases into liquids, a stirred kettle being used which has the form of a cylindrical vessel in which the length/diameter ratio should be at least 1. The stirred kettle is filled to a level of more than 70% with the liquid into which gas is to be introduced, the gas feed rate is adapted to the absorption capacity of the liquid, and the stirrer speed is adjusted such that the largest coherent gas space amounts, as a maximum, to 10% of the volume of the stirred kettle.

Abstract: N-methylmorpholine-N-oxide is prepared by reacting the azeotrope of methylmorpholine and water with an aqueous solution of hydrogen peroxide. The reaction solution product is thereupon concentrated to the desired content in N-methylmorpholine-N-oxide.

Abstract: The invention relates to a method for the manufacture of molding materials containing polyphenylene ether (PPE) and to the materials obtained according to this method. Molten PPE containing at least 0.1% volatile components is degasified until it reaches a residual content of volatile components of less than 500 ppm. Subsequently, additional molten polymers and/or additives are added to this molten mass at the lowest possible temperature and both components are mixed.

Abstract: A process for the production of a polyphenylene ether by quenching a transition metal catalyzed oxidative coupling reaction of a di-ortho-substituted phenol, and separation of the metal component. The process comprises:(1) removing the oxygen required for the coupling reaction,(2) contacting the reaction solution with hydrogen sulfide, a solution containing sulfide ions or a mixture thereof, and(3) separating the resulting precipitate.

Abstract: The invention relates to the method of manufacturing polyphenylene ethers by an oxidative coupling reaction of monomeric phenols in a solvent mixture comprised of an aromatic hydrocarbon with 6-8 carbon atoms and an aliphatic alcohol with 1-4 carbon atoms in a volumetric ratio of the hydrocarbon to the alcohol of 92.5:7.5 to 50:50, in the presence of a catalyst comprised of cupric chloride, a secondary diamine, and morpholine.

Abstract: A thermoplastic resin composition, which comprises (a) from 5 to 85 parts by weight of a melted or remelted preliminary molding compound consisting of from 60 to 98 parts by weight of polyphenylene ethers, 40 to 2 parts by weight of polyoctylenes, from 0.1 to 5 parts by weight of maleic anhydride and from 0.1 to 5 parts by weight of a further acid derivative which has a melting point below 100.degree. C. and which is selected from the group consisting of an unsaturated mono- or dicarboxylic acid having up to 14 carbon atoms, an anhydride thereof, which excludes maleic anhydride, and an ester of mono- or dicarboxylic acid with an alcohol of up to 6 carbon atoms; and (b) from 95 to 15 parts by weight of an aliphatic homopolyamide or a copolyamide containing a preponderant amount of aliphatic monomer units.

Abstract: This invention relates to a method of manufacturing aromatic polyamides having general formula(--CO--Ar--CO--NH--Ar'--X--Ar"--Y--Ar"--X--Ar'--NH--).sub.mwhere Ar, Ar', and Ar" each represent an m- or p-phenylene group, possibly substituted with alkyl groups having 1 to 4 carbon atoms; and X is O and Y is SO.sub.2 or X is SO.sub.2 and Y is O. In the present method, isophthalic and/or terephthalic acids are reacted with diamines of the formulaH.sub.2 N--Ar'--X--Ar"--Y--Ar"--X--Ar--NH.sub.2in the presence of a catalytic amount of an acid derived from phosphorus and having formula H.sub.3 PO.sub.n (where n=2, 3 or 4), or in the presence of triphenyl phosphite, and possibly in the presence of a 4-dialkylaminopyridine, in a polar, aprotic, organic solvent, at temperatures between 160.degree. and 300.degree. C.

Abstract: A storage-stabile, radiation-hardenable, NCO-free aqueous emulsions based on ionic urethane-urea acrylates is disclosed. The emulsions are made up of partially acrylated cycloaliphatic polyisocyanates which have been acrylated by a hydroxyalkyl acrylate (to the extent of 10-60 equivalent-% NCO). These products are then reacted with polyhydroxy compounds (to the extent of 20-75 equivalent-% NCO), and then with sodium salts of aminocarboxylic acids (to the extent of 5-15 equivalent-% NCO), and finally they are reacted with water and/or aliphatic diamines (said aliphatic diamines in amounts corresponding to 1-5 equivalent-% NCO).

Abstract: A method of manufacturing polyamides from aromatic dicarboxylic acids and aromatic diamines in the presence of catalytic amounts of a phosphorous-containing catalyst and a 4-diakylaminopyridine as cocatalyst, at temperatures above 180.degree. C., is described.

Abstract: The invention relates to a method for removing n-butyraldehyde from gas streams. It is characterized by washing with dilute aqueous alkali in a mass transfer apparatus. According to the invention, n-butyraldehyde can be removed from gas streams in the proportion of >90%, with operation at 0.degree.-40.degree. C. in the absence of added solubilizing agents.

Abstract: A precipitation procedure for preparing pulverulent coating compositions of high molecular weights by post condensation and based on polyamides having at least ten aliphatically bound carbon atoms per carbonamide group. The starting materials are uncontrolled polyamides having a relative solution viscosity of between 1.7 and 2.0 (measured in 0.5% meta cresol solution at 25.degree. C.) and contain not more than 0.2% by weight of phosphoric acid. After the cooling stage of the precipitation step of the polyamides, from 0.3 to 1.2% by weight of phosphoric acid referred to the polyamide are dispersed in the suspension prior to the precipitation in the solution or after the precipitation stage.

Abstract: A stirring system for dispersing gases in liquids, includes an upright mixing vessel with at least one baffle, a draft tube, and a stirring shaft with at least two stirrers, one of which stirrers is mounted at the upper end of the draft tube and the other at the lower end. The liquid into which the gases are to be introduced is charged into the mixing vessel to the extent that the liquid level lies above the upper edge of the draft tube and above the lower edge of the baffle or baffles.

Abstract: A method of producing cyclohexyl compounds by catalytic hydrogenation of benzyl compounds, particularly acetophenone, whereby the benzyl compounds are hydrogenated in the presence of a catalyst comprising Ru and a support, with said benzyl compounds being in a slurry or a trickling liquid phase, at a hydrogen pressure of 200-350 bar, particularly 250-320 bar, and a temperatures of from 80.degree. to about 160.degree. C., particularly 100.degree.-130.degree. C., wherewith the catalyst contains Ru in the amount of, in particular, 0.1-1 wt. %.

Abstract: In order to produce pure alpha, omega-C.sub.4 to C.sub.20 alkenols having purities in excess of 90% by dehydrating the corresponding alpha, omega-C.sub.4 to C.sub.20 diols, a catalyst is used which was prepared by using an alkaline earth orthophosphate or alkaline earth hydrogen phosphate or by reacting an alkaline earth compound with phosphoric acid into the corresponding phosphate and then adding an alkali or alkaline earth compound. This catalyst is suitable to be shaped, next it is dried and then calcined at temperatures between 350.degree. and 950.degree. C. The educt dehydration takes place at temperatures between 300.degree. and 500.degree. C. in selective and partial manner to obtain pure alpha, omega-C.sub.4 to C.sub.20 alkenols at conversions exceeding 90%.

Abstract: The invention relates to a two-stage method for concentrating solutions of polyphenylene ethers (5-15 wt. %) in organic solvents, wherein the first stage is operated with recycle and the second stage is operated in a single pass with no recycle side streams, to produce an accurately adjusted final concentration of between 50 and 60 wt. %.

Abstract: The invention relates to thermoplastic compositions made up of:A. Polyphenylene ethers, in an amount of 15-95 wt. parts;B. Styrene resins, in an amount of 0 to 70 wt. parts;C. E-SBR rubbers, in an amount of 3-15 wt. parts;D. Styrene-butadiene polymers prepared by emulsion polymerization (with styrene incorporated in the copolymer in the amount of 3-15 wt. parts; andE. Optionally, other additives.The invention further relates to a method for preparing such thermoplastic compositions.