Abstract: Catalysts for the addition of hydrogen chloride to chloroprene for the preparation of 1,3-dichlorobutene-(2) in the liquid phase, constituting a complex of copper(I)chloride, aqueous hydrochloric acid, hydrogen chloride andA. a pyridine substituted with 1 to 3 alkyl groups on carbon atoms, which alkyl groups contain 1 or 2 carbon atoms, orB. an N,N-dialkyl substituted aniline, the N-substituted alkyl groups being straight chain groups containing 1 to 3 carbon atoms and the aromatic nucleus being optionally substituted with 1 or 2 methyl groups, the C/N atomic ratio in the molecule of the substituted aniline being <14, orC) diethylamine orD) triethylamine orE) the hydrochlorides of the above mentioned nitrogen compounds.

Abstract: 4-AMINO-DIPHENYLAMINE IS PREPARED BY CATALYTICALLY HYDROGENATING 4-NITROSO-DIPHENYLAMINE IN A WATER-IMMISCIBLE SOLVENT IN THE PRESENCE OF Raney nickel as a catalyst. The hydrogenation reaction is generally carried out at a temperature in the range of from 20.degree. to 150.degree.C and can be carried out under an elevated hydrogen pressure of up to 50 atmospheres.

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.