Abstract: Mixtures consisting essentially of cyclohexylbiphenyls, dicyclohexylbenzenes, phenylbicyclohexyls and tercyclohexyls are outstandingly suitable as heat transfer media. The mixtures can be prepared from biphenyl and cyclohexanol in the presence of bleaching earths and subsequent hydrogenation.

Abstract: 4-Methyl-2-cyclohexylphenol can be prepared by alkylation of p-cresol with cyclohexanol or cyclohexene by performing the reaction in the liquid phase in the presence of 1-10% by weight, based on the amount of p-cresol, of a large pore, acidic zeolite.

Abstract: Alkylated aromatic amines can be isolated from crude catalyst-containing mixtures of these with olefins by a procedure in which in general equivalent amounts of an inorganic base and water are added to the alkylation mixture, the catalyst is hydrolysed, the water present in the reaction mixture after the hydrolysis is removed by distillation and the solid catalyst residue is separated off. The catalyst-free alkylation mixture which remains is then fed to customary further working up.

Abstract: The invention relates to the use of certain aromatic compounds of the formula ##STR1## in which R', R" and X have the meaning given in the description,as dielectric liquids for high-energy voltage-storage capacitors, and to dielectric liquids containing these aromatic compounds, for these high-power capacitors.

Abstract: Liquid compositions, having dielectric properties, which contain mixtures of ditolylether isomers and alkylbenzenes.

Abstract: Compositions containing ditolyl ethers have outstanding dielectric properties. They are particularly suitable for use as impregnating agents in condensers.

Abstract: 1,1,3,3-substituted hydroxyindanes of the formula ##STR1## wherein R.sup.1 is selected from the group of hydrogen, halogen and optionally substituted alkyl, cycloalkyl, aralkyl and aryl and the group ##STR2## wherein X is sulphur or the group ##STR3## R.sup.2 and R.sup.3 can be the same or different and are selected from the group of hydrogen, halogen and optionally substituted alkyl, cycloalkyl, aralkyl and aryl group, or, ifR.sup.2 and R.sup.3 are in the ortho position to each other, they may form a condensed carbocyclic 5-membered ring together with the carbon atoms of the benzene ring to which they are attached as substituents,R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8 and R.sup.9 are the same or different and are selected from the group of optionally substituted alkyl, cycloalkyl, aralkyl and aryl orR.sup.4 and R.sup.5 and/or R.sup.6 and R.sup.7 and/or R.sup.8 and R.sup.9 can form a cycloaliphatic ring together with the carbon atom to which they are attached as substituents orR.sup.6 and/or R.sup.

Abstract: A dielectric composition comprising a mixture of monoisopropylated diphenyls and polyisopropylated diphenyls, especially a mixture of 30 to 60 parts by weight of monoisopropylated diphenyls and 70 to 40 parts by weight of polyisopropylated diphenyls, the polyisopropylated diphenyls preferably being made up in turn of 60 to 85 parts by weight of diisopropylated diphenyls, 10 to 35 parts by weight of triisopropylated diphenyls and 0.5 to 5 parts by weight of tetraisopropylated diphenyls, these latter amounts being based upon the total amount of the polyisopropylated diphenyls.

Abstract: A process for the preparation of a-phenoxy-benzaldehyde which comprises contacting the 3-phenoxy-benzyl alcohol of the formula ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and represent hydrogen or halogen with an aqueous solution of a dichromate in the presence of aqueous sulphuric acid at a temperature in the range of 50.degree. to 125.degree. C. The 3-phenoxy-benzaldehyde can be in a mixture of other organic compounds such as obtained by hydrolyzing a 3-phenoxy toluene chlorinated in the side chain at a temperature of 140.degree.-210.degree. C. under pressure.

Abstract: An improvement in an electrical device containing a functional liquid wherein the functional liquid is a compound of the formula ##STR1## and the use of such compounds as dielectrics.

Abstract: A color photographic recording material is provided containing at least one dye image or a color coupler for the production of a dye image and the material contains in at least one hydrophilic layer a hydroxyindane as defined hereinafter to reduce the fading of the image dye on exposure to UV or visible light.

Abstract: 1,1,3,3-SUBSTITUTED HYDROXY INDANES HAVING THE FORMULA ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, are selected from the group of hydrogen, halogen and optionally substituted alkyl, cycloalkyl, aralkyl and aryl, in addition to whichR.sup.2 and R.sup.3, when they are in the ortho position relative to one another, may be taken together with the carbon atoms of the benzene ring to which they are attached to form a 5 membered carbocyclic ring,R.sup.4 is ##STR2## wherein R.sup.10 and R.sup.11, which may be the same or different, are selected from the group of hydrogen and optionally substituted alkyl, cycloalkyl, aralkyl and aryl, andR.sup.5, r.sup.6, r.sup.7, r.sup.8 and R.sup.9, which may be the same or different, are selected from the group of optionally substituted alkyl, cycloalkyl, aralkyl and aryl, the arrangement being such thatR.sup.5 and R.sup.10 and/orR.sup.6 and R.sup.7 and/orR.sup.8 and R.sup.

Abstract: Thermographic recording material or image-receiving material for dry copying processes comprising at least one layer and a substantially non-photosensitive reducible silver salt, a reducing agent, and optionally a toning agent or toning mixture, wherein the reducing agent corresponds to the following general formula: ##STR1## wherein: EACH OF R.sup.1, R.sup.3 and R.sup.5 (equal or different) represents hydrogen, a straight-chain or branched alkyl group comprising 1 to 9 carbon atoms, or a cycloalkyl group, with the proviso that R.sup.1 and R.sup.5 do not represent hydrogen simultaneously,R.sup.2 represents a straight-chain or branched alkyl group comprising 1 to 4 carbon atoms, or a cycloalkyl group,R.sup.4 represents hydrogen, or a straight-chain or branched alkyl group comprising 1 to 4 carbon atoms, or a cycloalkyl group,And wherein each of R.sup.1 and R.sup.2 together, R.sup.2 and R.sup.3 together or R.sup.4 and R.sup.

Abstract: In the preparation of 5-isopropyl-3-methyl-phenol from 3-methyl-phenol carrying at least one isopropyl radical or in the presence of propene by heating in the presence of a catalyst, the improvement which comprises effecting said heating at a temperature of about 200.degree. to 400.degree.C in the presence, as a catalyst, of synthetic aluminum silicate which has not been treated with acid. The reaction can involve isopropylation, isomerization and/or transisopropylation.

Abstract: 1,1,3,3-SUBSTITUTED HYDROXYINDANES OF THE FORMULA ##SPC1##WhereinR.sup.1 is selected from the group of hydrogen, halogen and optionally substituted alkyl, cycloalkyl, aralkyl and aryl and the group ##SPC2##WhereinX is sulphur or the group ##EQU1## R.sup.2 and R.sup.3 can be the same or different and are selected from the group of hydrogen, halogen and optionally substituted alkyl, cycloalkyl, aralkyl and aryl group, or, ifR.sup.2 and R.sup.3 are in the ortho position to each other, they may form a condensed carbocyclic 5-membered ring together with the carbon atoms of the benzene ring to which they are attached as substituents,R.sup.4, r.sup.5, r.sup.6, r.sup.7, r.sup.8 and R.sup.9 are the same or different and are selected from the group of optionally substituted alkyl, cycloalkyl, aralkyl and aryl orR.sup.4 and R.sup.5 and/or R.sup.6 and R.sup.7 and/or R.sup.8 and R.sup.9 can form a cycloaliphatic ring together with the carbon atom to which they are attached as substituents orR.sup.6 and/or R.sup.

Abstract: This invention relates to a color photographic material with at least one silver halide emulsion layer having improved stability against crystallization and which contains in dispersed form a open chain keto methylene coupler a naphtholic or pyrazolone color coupler substituted with a 2-cyclo-pentyl-4-t-butyl-phenoxy group in a non-coupling position.