Abstract: Para-substituted o-benzylphenols are prepared by reacting p-substituted phenols with benzylating agents in the presence of zeolites of the faujasite type at elevated temperature.

Abstract: N-alkylated anilines can be prepared by reaction of anilines with lower alcohols or dialkyl ethers at elevated temperature and in the presence of zeolite catalysts of the pentasil type containing protons and having an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least 60.

Abstract: New polysaccharide carbonates are produced by acylation of polysaccharides with carbonic acid esters and have degrees of substitution of preferably 0.5 to 3.

Abstract: Thermoplastic moulding compounds composed of99.8-95% by weight of A) 0-100% by weight of a graft polymer B) 100-0% by weight of a thermoplastic polymer of vinyl monomers and0.2 to 5% by weight of a polyalkylene ether which has been grafted with a polymer of C.sub.1 -C.sub.6 alkyl acrylates, cycloalkyl acrylates or methacrylates and optionally styrene or .alpha.-methyl styrene.

Abstract: This invention relates to aliphatic polycarbonates including sequential copolymers based on cyclic aliphatic carbonates and esters and block copolymers of blocks of polymerised cyclic aliphatic carbonates and blocks of polymerised vinyl compounds stabilized against thermal degradation containing 0.01 to 3.0% by weight, based on polymer, of a compound of trivalent phosphorus.

Abstract: Thermoplastic moulding compositions composed ofI) 99.8-95% by weight of(A) 0-100% by weight of one or more graft polymers comprise the monomers styrene, .alpha.-methyl styrene, methyl methacrylate or a mixture of 95-50% by weight of styrene, .alpha.-methyl styrene, ring substituted styrene, methyl methacrylate or mixtures thereof with 5-50% by weight of methacrylonitrile, acrylonitrile, maleric acid anhydride, N-substituted malerimides or mixtures thereof, grafted onto a rubber substrate, andB) 100 to 0%, by weight of one or more thermoplastic vinyl polymers, andII) 0.2 to 5% by weight of a polyalkylene ether modified by a radical former which can be compounds conventionally used as an initiator for radical polymerization such as peroxides.

Abstract: Polyamides are stabilized by phenothiazines.

Abstract: Anilines or N-alkyl-anilines are advantageously reacted with alkyl alcohols or the associated dialkyl ethers at elevated temperature in the gas phase, if a .gamma.-Al.sub.2 O.sub.3 is used that is prepared by dehydration of an aluminum oxide/hydroxide hydrate and has a BET surface area from 50 to 400 m.sup.2 /g and a surface acidity of 5 to 600 mmol H.sup.+ /kg.

Abstract: p-Chlorotoluene can be prepared in an improved manner by catalyzed reaction of toluene with a chlorinating agent if a zeolite L containing metal cations is employed as the catalyst and the reaction is carried out in the presence of methylene chloride and/or chloroform.

Abstract: Oligophenyls dihalogenated in the 4,4'-position, of the formula ##STR1## can be prepared by catalyzed halogenation of oligophenyls of the formula ##STR2## wherein, in the formulae, X.sup.1 and X.sup.2 independently of one another represent chlorine or bromine, preferably chlorine,X.sup.3 denotes hydrogen, chlorine or bromine, preferably hydrogen or chlorine and particularly preferably hydrogen,R.sup.1, R.sup.2 and R.sup.3 independently of one another represent hydrogen, C.sub.1 -C.sub.4 -alkyl (preferably methyl or ethyl and particularly preferably methyl), C.sub.1 -C.sub.4 -alkoxy (preferably methoxy or ethoxy and particularly preferably methoxy), fluorine, chlorine or bromine anda assumes the value zero or one,with halogenating agents, the preparation being carried out in the presence of methylene chloride or solvent mixtures essentially containing methylene chloride and in the presence of zeolites of the L structure type which contain metal cations.

Abstract: Thymol can be prepared by reaction of m-cresol with propene at elevated temperature and at atmospheric to superatmospheric pressure by using wide- and medium-pored zeolites which have a pore diameter of at least 5 .ANG. as heterogeneous catalysts.

Abstract: Cyclic carbonic acid esters are produced by reaction of hydroxy compounds with phosgene in the presence of a heterocyclic compound containing at least one nitrogen atom as ring member in an aromatic ring.

Abstract: This invention relates to branched thermoplastic polycarbonates containing hydroxybenzotriazoles corresponding to the following general formula (I): ##STR1##

Abstract: Aromatic polyesters are prepared by the transesterification of aromatic dicarboxylic acid dialkyl esters with diester derivatives of divalent phenols at temperatures of about 260.degree. to 350.degree. C. with removal of the resulting monocarboxylic acid alkyl ester from the reaction mixture.

Abstract: Phenylketones etherified in the 4-position can be prepared by reaction of aromatic ethers which have a free 4-position with acylating agents, the acylation being carried out in the presence of zeolite catalysts having pore sizes of at least 5 .ANG..

Abstract: Trialkylsilyloxy-1,1-diphenyl ethylenes corresponding to general formula I, new polymers produced therewith terminated by aryl trialkylsilyl ether groups or by phenolic hydroxyl groups and a process for the production of these polymers by anionic polymerization ##STR1## in which R.sup.1, R.sup.2 =H, C.sub.1 -C.sub.4 alkyl, OCH.sub.3,R.sup.3 =H, C.sub.1 -C.sub.4 alkyl, O--C.sub.1 -C.sub.4 alkyl,R.sup.4 =H, C.sub.1 -C.sub.4 alkyl,R.sup.5 =C.sub.1 -C.sub.4 alkyl,R.sup.6 =H, C.sub.1 -C.sub.4 alkyl.

Abstract: 4,4'-dihalobiphenyls can be prepared by catalyzed halogenation of biphenyls with halogenating agents, the catalysts used being zeolites having pore sizes of at least 5 .ANG..

Abstract: N-Alkylanilines can be prepared by reaction of anilines with N,N-dialkylanilines in the gas or liquid phase at elevated temperature by carrying out the reaction in the presence of zeolites.

Abstract: The invention relates to flame-resistant mixtures of polycarbonates with graft polymers and copolymers which are characterized in that they contain modified polyalkylene ethers as antistatic agent.

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.