Abstract: A process for separating from each other aniline and aniline derivatives having different numbers of C atoms bound to the N atoms is disclosed herein, this process being characterized in that a mixture of the substances mentioned is treated in liquid phase with zeolites of the faujasite type at a temperature from 0.degree. C. to 190.degree. C.

Abstract: Iodine and organic iodine compounds which may be radioactive and which may be found in waste gases or vapors from nuclear reactors can be removed from such gases or vapors by passing the iodine or organic iodine compound-containing gases or vapors through a layer of binder-free silver-exchanged molecular sieve granulates of the faujasite type.

Abstract: 2-Amino-alkylpyridines are prepared by catalysed isomerisation of 1,3-diaminobenzenes at elevated temperature.

Abstract: The present invention relates to a new zeolite material having a composition (molar ratios of the oxides) corresponding to the formula:M.sub.2/n O.Al.sub.2 O.sub.3.(20-150) SiO.sub.2(M represents n-valent cation) to a process for the production thereof using hexamethylene imine and to the use of the zeolite material as a catalyst in the conversion of methanol and/or dimethyl ether to hydrocarbons.

Abstract: In a polysiloxane-based dental composition which crosslinks by an addition reaction and hardens at room temperature, the composition comprising(a) an organopolysiloxane with at least two vinyl groups in the molecule,(b) an organohydridopolysiloxane,(c) a catalyst to accelerate the addition reaction, and(d) a hydrophobic filler, the improvement which comprises including therein(e) an aluminosilicate containing finely divided palladium. This removes any by-product hydrogen and results in a smoother surface on any plaster of Paris moldings made from the hardened composition.

Abstract: The invention provides a process for the production of zeolite A from kaolin by conversion of the kaolin into meta-kaolin followed by reaction of the meta-kaolin in an aqueous alkaline medium, wherein the conversion of the kaolin into the meta-kaolin is conducted at temperatures of between 700.degree. and 950.degree. C. in the presence of alkaline earth compounds and optionally in the presence of uncolored halides and/or halogens, wherein the process may be conducted under reducing conditions and in the presence of alkali metal compounds.

Abstract: A process for the separation of isomeric dichlorotoluenes is described wherein an isomeric mixture of dichlorotoluenes is passed over a zeolite of the X or Y type, non-adsorbed dichlorotoluene is separated off and the adsorbed dichlorotoluene is eluted from the zeolite by contacting the same with an eluant.

Abstract: A lacquer comprising an organic binder, at least one pigment or filler, and a zeolite in an amount sufficient to increase the dispersibility of the pigment or filler. Advantageously the pigment is at least one of titanium dioxide, iron oxide and mixed-phase rutile, and the binder is a polyester. Desirably the pigment is present in from about 1 to 5% by volume of the pigment plus any filler and its average particle size is from about 1 to 3 .mu.m.

Abstract: A process for the production of synthetic zeolite with the crystal structure of faujasite and with a composition corresponding to the formula:Na.sub.2 O . Al.sub.2 O.sub.3 . (2.5 .+-. 0.5) SiO.sub.2 . n H.sub.2 O(n = 0 to 8)comprising forming a reaction mixture containing Na.sub.2 O, Al.sub.2 O.sub.3, SiO.sub.2 and H.sub.2 O at a temperature of about 60.degree. to 105.degree. C in the presence of about 1 to 20% of finely divided zeolite A based on the weight of Na.sub.2 O + Al.sub.2 O.sub.3 + SiO.sub.2, thereby to form a precipitate which crystallizes to form a synthetic zeolite of faujasite structure. Advantageously the molar ratios of the oxides in the reaction mixture, exclusive of the added zeolite A, are approximately:SiO.sub.2 /Al.sub.2 O.sub.3 = 3 to 5Na.sub.2 O/SiO.sub.2 = 1.2 to 1.5H.sub.2 O/Na.sub.2 O = 35 to 45.Even if the mass is stirred during crystallization, little or no phillipsite is produced.