Abstract: This invention relates to a process for preparing a white or at least near white product which is predominant in decabromodiphenyl alkane and which has an average bromine number of at least 9.0.

Abstract: This invention relates to process for preparing decabromodiphenyl methane, which process comprises: charging a reaction vessel with a first portion of a reaction solvent, a catalytic amount of a halogenation catalyst and from about 10 moles to about 30 moles of bromine per mole of diphenyl methane to be reacted; adding a solution of diphenyl methane and a second portion of the reaction solvent to the charged reaction vessel to form a reaction mass, the reaction mass, as it is being formed, being maintained at a temperature within the range of from about -15.degree. C. to about 15.degree. C.; after the diphenyl methane addition is substantially complete, maintaining the temperature of the reaction mass from about 50.degree. C. to about 80.degree. C.; and recovering from the reaction mass decabromodiphenyl methane.

Abstract: Disclosed is a shaped zeolite catalyst used for liquid phase organic reactions. The shaped zeolite catalyst is composed of substantially spherical particles having a particle diameter substantially in the range of from 70 to 300 .mu.m, and which has fine pores having a pore volume of 0.4 to 1 cc per gram of the shaped catalyst and a median pore diameter based on the pore volume of 1,000 to 5,500 .ANG..

Abstract: Aromatic hydrocarbons which are monosubstituted by straight-chain or branched C.sub.1 -C.sub.12 -alkyl or by C.sub.3 -C.sub.8 -cycloalkyl can be chlorinated in the presence of Friedel-Crafts Catalysts in liquid phase on the aromatic ring if cyclic benzo-fused imines or benzo[f]-1,4-thiazepines are used as co-catalysts. This makes it possible to obtain a higher proportion of p-isomers.

Abstract: As zeolite L is used as catalyst for the chlorination of benzene, chlorobenzene, ortho-dichlorobenzene, and/or meta-dichlorobenzene, its catalytic activity diminishes. Zeolite L which has been used for such chlorinations may be reactivated by contact with steam.

Abstract: 4-Bromobiphenyl is selectively produced in high yields, and in high conversions, by monobrominating biphenyl in a solvent reaction medium containing at least one organosulfur compound, amide, nitrile or acid having a pKa of at least 3.

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: A method for producing 4,4'-dibromobiphenyl, which comprises reacting biphenyl and from 2 to 3 mol times, relative to biphenyl, of bromine in a halogenated hydrocarbon solvent in the presence of a catalyst which is a simple substance of an element selected from the group consisting of antimony, titanium, tin and zinc, or a compound of the element.

Abstract: Aromatic hydrocarbons which are monosubstituted by straight-chain or branched C.sub.1 -C.sub.12 -alkyl or by C.sub.3 -C.sub.8 -cycloalkyl can be chlorinated in the presence of Friedel-Crafts Catalysts in liquid phase on the aromatic ring if 1,6-benzothiazocins are used as co-catalysts. This makes it possible to obtain a higher proportion of p-isomers.

Abstract: A para-substituted halogenobenzene derivative is prepared by halogenating a benzene derivative in the liquid phase in the presence of a molded zeolite catalyst body comprising, based on the weight of the molded zeolite catalyst body, 10 to 95% by weight of an L-type zeolite as the anhydrous state and 5 to 90% by weight of amorphous silica.

Abstract: Monohalogenated cyclobutarenes are prepared by halogenating a cyclobutarene in the presence of an organic complexing agent, an acid scavenger, or water. Faster reaction rates highly selective to monohalogenated cyclobutarenes are obtained without conventional heavy metal or halogen catalysts.

Abstract: A process for the chlorination of the benzene rings of tricyclo 8.2.2.2 hexadeca 4,6,10,12,13,15 hexane (or (2,2)-paracyclophane) having the formula (I): ##STR1## by gaseous chlorine, by operating in the presence of at least one metal chloride as a catalyst, and at least one co-catalyst having the formula V:R--OH (V)whereinR=hydrocarbon or alkylcarboxylic radical with linear or branched chain, containing from 1 to 6 carbon atoms is taught.

Abstract: A p-substituted halobenzene derivative, which is very valuable in industry, can be obtained by halogenation of benzene and/or a benzene derivative in the liquid phase using, as a catalyst, a faujasite type zeolite in the presence of any one member selected from the group consisting of sulfur-containing compounds, nitrogen-containing organic basic compounds, salts of said nitrogen-containing organic basic compounds, and a mixture of said nitrogen-containing organic basic compounds and salts thereof.

Abstract: Aromatic hydrocarbons are chlorinated in the nucleus in the presence of Friedel-Crafts catalysts and in the presence of co-catalysts in the liquid phase by using thiazepines as co-catalysts.

Abstract: p-Substituted halogenated benzene derivatives are prepared at a high selectivity by halogenating benzene and/or benzene derivatives by using as a catalyst a zeolite modified with a metal salt.

Abstract: 1,2,4-Trichlorobenzene is produced by chlorinating benzene, chlorobenzene, meta-dichlorobenzene, ortho-dichlorobenzene, or a mixture of two or more thereof in a reaction medium comprising a liquid phase and a catalytic amount of zeolite L, zeolite Y, or a mixture thereof.

Abstract: A process for producing a halobenzene represented by the formula: ##STR1## where R is a lower alkyl group, a lower alkoxy group or a halogen atom, and X is a halogen atom, which comprises halogenating a benzene represented by the formula: ##STR2## where R is as defined above, in a liquid phase in the presence of a catalyst, characterized in that the catalyst is a combination of an aliphatic carboxylic acid component and a zeolite having a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of from 3 to 8 and a pore size of from 6 to 10 .ANG..

Abstract: m-Chlorotoluene is removed from chlorotoluene mixtures with a content of up to 10% by weight of m-chlorotoluene, with reference to the total amount of chlorotoluene in the mixture, by chlorinating a substantially toluene-free chlorotoluene mixture in the presence of a Friedel-Crafts catalyst and if appropriate a co-catalyst at from 0.degree. C. up to the boiling point of the mixture, until the content of m-chlorotoluene has decreased to a value of <1.0% by weight in the chlorotoluene mixture.

Abstract: Monobrominated cyclobutarenes are prepared by brominating a cyclobutarene in the presence of an organic complexing agent, an acid scavenger, or water. Faster reaction rates highly selective to monobrominated cyclobutarenes are obtained without conventional heavy metal or halogen catalysts.

Abstract: A process for producing a chlorohalobenzene represented by the general formula: ##STR1## where X' is a halogen atom, by chlorinating a benzene represented by the general formula: ##STR2## where X is a hydrogen atom or a halogen atom, in a liquid phase in the presence of a catalyst, characterized in that L-type zeolite is used as the catalyst.

Abstract: A method for preparing Con-BAN, in which Con-AN is reacted with bromine in the presence of an iron Lewis acid catalyst and in which the solution of Con-AN and bromine are supplied simultaneously at a given rate into a reactor already containing a halogenated hydrocarbon and an iron catalyst.

Abstract: The process relates to a process for the vapor phase bromination of aromatic compounds in the presence of oxygen and a catalyst comprising an oxidizing metal and an inert support.

Abstract: A process for the separation of a mixture of diiodonaphthalene isomers into an adsorbed component and a non-adsorbed component by passing the mixture over a zeolite to obtain an adsorbed zeolite containing the adsorbed component, separating off the non-adsorbed component and eluting the adsorbed zeolite with a desorbent to obtain the adsorbed component.

Abstract: A process for the liquid-phase oxyiodination of naphthalene which comprises (1) preparing a liquid-phase feed mixture of iodine and naphthalene and/or iodine, naphthalene and iodonaphthalenes, and (2) contacting the feed mixture with a zeolite catalyst in the presence of a gaseous source of oxygen to produce an iodinated naphthalene mixture and water, and (3) removing water from the iodinated naphthalene mixture.

Abstract: The invention relates to a process for isomerizing liquid iodoaromatic compounds over an acid catalyst.

Abstract: The invention relates to a process for isomerizing iodoaromatic compounds over a non-acidic zeolite catalyst in the liquid or gas phase in the presence of a source of iodine.

Abstract: Disclosed is a process for iodinating aromatic compounds by reacting an aromatic compound with oxygen in the presence of a catalyst containing alkaline or alkaline earth cations.

Abstract: A p-halogeno-monoalkylbenzene is prepared at an enhanced selectivity by halogenating a monoalkylbenzene in the liquid phase in the presence of an L-type zeolite catalyst.

Abstract: In the liquid phase chlorination of benzene derivatives including benzene per se in the presence of a zeolite possessing the main pores having the opening formed of a 12-membered oxygen ring; para-substituted chlorinated benzene derivatives are preferentially obtained by adding a small quantity of a quaternary ammonium salt or salts to the reaction mixture.

Abstract: Disclosed is a process for iodinating an aromatic compound over a zeolite catalyst containing a deactivation modifier selected from the group consisting of ions or salts of hydrogen, copper, zinc, cadmium, silver and mercury.

Abstract: A method for the synthesis of iodobenzene by iodination, in the gaseous phase, of benzene with iodine, in the presence of a zeolitic catalyst, selected from the group comprising the zeolites of X type or of Y type, characterized in that said iodination is an oxidative one and that said zeolites are in a form different from the acid (H) form.

Abstract: A method for the synthesis of iodobenzene by oxydative iodination in a gaseous phase of benzene with iodine and oxygen, air or another gas containing oxygen, in the presence of a zeolitic catalyst, selected from the group comprising the zeolites of ZSM 5 and ZSM 11 type.

Abstract: A process for iodinating aromatic compounds, comprising the steps of iodinating an aromatic compound, separating a desired iodoaromatic product from the product mixture, purifying said desired iodoaromatic product, and isolating said desired product.

Abstract: This invention relates to a process for iodination of aromatic compounds in the presence of oxygen over a zeolite catalyst.

Abstract: The invention relates to a process for iodinating an aromatic compound which comprises reacting iodine and the aromatic compound over a non-acid catalyst, wherein the catalyst has been contacted with an alkali or alkaline earth metal salt, with a source of iodine and a source of molecular oxygen.

Abstract: A process for iodinating an aromatic compound in which a source of iodine is reacted with the aromatic compound in the presence of oxygen over a non-acid catalyst wherein the aromatic compound has a fluoro, chloro, bromo, iodo, hydroxy or cyano group.

Abstract: In a process for reacting an aromatic compound (preferably chlorobenzene) with free chlorine in the presence of a catalyst comprising a zeolite of the L family (zeolite L) under such reaction conditions as to obtain a product comprising 1,4-dichlorobenzene, the improvement comprises employing ammonium ion-exchanged zeolite of the L family.

Abstract: A process for the preparation of 3,4-dichlorobenzotrihalides of the formula I ##STR1## where X is fluorine or chlorine, by reacting the corresponding 4-monochlorobenzotrihalides with chlorine gas in the presence of a catalytic amount of a Lewis acid, wherein the reaction mixture is recycled by means of a pump in a circulatory apparatus with static mixers and the amount of chlorine equivalent to the conversion of the corresponding 4-monochlorobenzotrihalide is introduced at 20.degree.-120.degree. C.

Abstract: A nuclear halide of a monoalkylbenzene is prepared by halogenating a monoalkylbenzene in the presence of an L-type zeolite catalyst.

Abstract: The invention relates to a process for the removal of m-dichlorobenzene from dichlorobenzene mixtures by chlorination in the liquid phase at elevated temperature in the presence of Friedel-Crafts catalysts, the chlorination being carried out with addition of sulphur, sulphur compounds, iodine and/or iodine compounds and the chlorination mixture then being worked up in the usual way.

Abstract: A p-substituted halobenzene derivative, which is very valuable in industry, can be obtained by halogenation of benzene and/or a benzene derivative in a liquid phase at a temperature of 0.degree. to 200.degree. C. at a higher selectivity and yield than in known processes, using, as a catalyst, an L type zeolite alkali-treated with an alkali solution of pH 11 or above at a temperature of 0.degree. to 100.degree. C. for 0.5 to 100 hours.

Abstract: A process for producing a p-chlorobenzene having the formula: ##STR1## wherein R is a lower alkyl group, a lower alkoxy group or a halogen atom, which comprises chlorinating a benzene having the formula: ##STR2## wherein R is as defined above, in a liquid phase in the presence of a catalyst, characterized in that the catalyst is a combination of an aliphatic alcohol having the formula:R'OH (III)wherein R' is a lower alkyl group or a lower haloalkyl group, and a zeolite having a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of from 3 to 8 and a pore size of from 6 to 10 .ANG..

Abstract: The substitution chlorination reactions of organic compounds are carried out by means of molecular chlorine, using, as a radical initiator, decachlorobutane or an octachlorobutane such as octachlorobut-1-ene or a mixture containing these two products.Good degrees of conversion and good yields are obtained at moderate temperatures.The process is, for example, applicable to the substitution chlorination of benzene and of chloroform.

Abstract: A process for the chlorination of aromatic derivatives. The aromatic derivative is reacted with chlorine gas in liquid hydrofluoric acid. The products obtained are useful as intermediates for the synthesis of compounds having a plant-protecting or pharmaceutical activity.

Abstract: A process for the stimulaneous halogenation and fluorination of aromatic derivatives substituted by at least one group containing a halogenoalkyl unit. The aromatic derivative is reacted with the halogen in liquid hydrofluoric acid. The products obtained are useful as intermediates for the synthesis of compounds having a plant-protecting or pharmaceutical activity.

Abstract: A process for the preparation of a trichlorobenzene by chlorination of o-dichlorobenzene in the presence of a catalyst is disclosed. The catalyst comprises aluminum chloride. Preferably an iron or iron chloride containing aluminum chloride catalyst is employed.

Abstract: A process for consecutive-competitive gas phase halogenation of organic compounds, i.e. alkanes, alkenes and benzene, alkyl benzenes and alkenyl benzenes containing labile hydrogens and having no more than 12 and 9 carbon atoms, respectively, in a thin reaction film on the surface of a porous barrier for production of highly halogenated products by substantial suppression of diffusion of partially halogenated intermediates away from the reaction film is disclosed.

Abstract: The meta-dihalobenzenes are selectively 2-chlorinated by reacting same with a chlorine donor, e.g., hexachlorobenzene or pentachlorobenzene, in the presence of at least one alkali metal amide, e.g., sodamide, and at least one compound which complexes the cation of such at least one alkali metal amide.

Abstract: A process for the preparation of monochlorinated and dichlorinated bis-(perhalomethyl)-benzenes of the formula (I) by reacting bis-(perhalomethyl)-benzenes of the formula (II) with elementary chlorine in chlorosulfonic acid as the reaction medium, at a temperature of, preferably, 0.degree. to 10.degree. C. The present invention makes it possible to obtain pure compounds of the formula (I), in high yields, in a single process step.

Abstract: Process for nuclear chlorination of non-phenolic aromatic compounds, said process comprising contacting and reacting a non-phenolic aromatic compound having a net Hammett .sigma. value of about -0.1 to about 2.0 with chlorine monoxide in the presence of at least one-half an equivalent amount, based on the chlorine monoxide, of an acid having a pK.sub.a no greater than that of trichloroacetic acid, provided, however, when the net Hammett .sigma. value is about 0.7 to about 2.0, the acid has a pK.sub.a no greater than that of trifluoroacetic acid.