Abstract: Thiazolesulphenamides, useful as rubber vulcanization accelerators, are made by reaction of a 2-mercapto-thiazole or a 2,2'-dithiazolyl disulphide with ammonia or a primary or secondary amine in the presence of oxygen and a copper catalyst of specified kind.

Abstract: Dextrorotatory 2-phenoxypropionic acids are made by heating an alkali metal salt of dextrorotatory 2-chloropropionic acid with an alkali metal phenate in an inert organic solvent of high boiling point under reflux.

Abstract: Trimethyl-p-benzoquinone is produced in good yields quickly by oxidation of 2,3,6-trimethyl-phenol in the presence of a complex cobalt salt of the general formula: ##STR1## in which: R.sup.1 and R.sup.2, which can be identical or different, each represents an alkoxy radical possessing 1 to 4 carbon atoms, and R.sup.3 represents a divalent hydrocarbon radical possessing 2 to 15 carbon atoms, in an inert organic solvent medium.

Abstract: Oxadiazoline derivatives of the formula: ##STR1## WHEREIN R is alkyl of 1 through 4 carbon atoms, which are useful as intermediates in the synthesis of oxadiazoline derivatives of the formula: ##STR2## WHEREIN R is as defined above the R.sub.1 is alkyl of 1 through 4 carbon atoms, possessing useful herbicidal properties, are prepared by a new process which comprises reducing the nitro group in a 5-alkyl-3-(2-nitro-4-chlorophenyl)-1,3,4-oxadiazolin-2-one of the formula: ##STR3## wherein R is as defined above to a hydroxylamino group, treating the resulting 5-alkyl-3-(2-hydroxylamino-4-chlorophenyl)-1,3,4-oxadiazolin-2-one with concentrated sulphuric acid of density about 1.83 to produce the corresponding amino-phenol, and converting the amine group in the resulting 5-alkyl-3-(2-amino-4-chloro-5-hydroxyphenyl)-1,3,4-oxadiazolin-2 -one to a chlorine atom. The 5-alkyl-3-(2-hydroxylamino-4-chlorophenyl)-1,3,4-oxadiazolin-2-one intermediates are new compounds.

Abstract: Aromatic alkenyl compounds, for example, eugenol and safrole, are isomerized, for example to isoeugenol and isosafrole, by contact with a ruthenium or osmium catalyst.

Abstract: Ionically crosslinked polymers which are soluble in a liquid organic medium and which correspond to the general formula: ##STR1## in which: the symbol N.sym. represents a quaternary nitrogen-containing group; the symbol ##STR2## REPRESENTS A MACROMOLECULAR CHAIN CARRYING GROUPS WHICH ARE CAPABLE OF BEING LINKED, VIA A COVALENT BOND, TO -SO.sub.3 .crclbar. groups; the symbol ##STR3## REPRESENTS A MACROMOLECULAR CHAIN CARRYING GROUPS WHICH CAN GIVE RISE TO THE FORMATION OF N.sym. groups, the symbol ##STR4## INDICATING THAT THE N.sym. groups are linked to the macromolecular chain by at least one covalent bond, and the chains ##STR5## CONSIDERED TOGETHER, DO NOT CONTAIN OPPOSITELY CHARGED GROUPS WHICH ARE CAPABLE OF FORMING INTER-CHAIN COVALENT BONDS, THE RATIO N/M IS BETWEEN 0.1 AND 10; AND THE NATURE OF THE UNITS FORMING THE MACROMOLECULAR CHAINS AND THE VALUES OF N AND M BEING SUCH THAT A POLYMER OF FORMULA (I.sub.

Abstract: A process is provided for the preparation of aryl ketones by catalytic decomposition of tertiary hydroperoxides, in particular for the preparation of acetophenone from cumene hydroperoxide, said process comprising effecting the catalytic decomposition of a tertiary hydroperoxide of the formula: ##STR1## in which Ar represents a monovalent aromatic radical, the free valency of which is carried by a carbon atom belonging to an aromatic ring, and R.sup.1 and R.sup.2, which may be identical or different, each represents a monovalent aliphatic radical or R.sup.1 and R.sup.2 together form a divalent aliphatic radical, in a reaction medium comprising water, an inorganic or organic derivative of copper and a phenol, and at a temperature of from 50.degree. C to 150.degree. C.

Abstract: Polyamines possessing imide groups are obtained by heating at least one unsaturated polyimide of the general formula: ##STR1## WITH AT LEAST ONE POLYAMINE OF THE GENERAL FORMULA:Z(NH.sub.2).sub.bin which a and b each independently represents a number ranging from 2 to 6, Y represents an organic radical of valency a and Z represents an organic radical of valency b, in amounts such that the ratio of the number of NH.sub.2 groups introduced by the polyamine to the number of imide groups introduced by the polyimide is greater than 1 and at most equal to 5. These polyamines are useful for curing epoxy resins.

Abstract: A process is provided for the preparation of a juxtanuclear or extranuclear aromatic aldehyde, said process comprising effecting the catalytic reduction of the corresponding acid chloride using hydrogen in the presence of a palladium catalyst and a tertiary amide. The use of the tertiary amide increases the selectivity, activity and working life of the catalyst as compared with conventional processes and renders the use of catalyst regulators such as quinoline or sulphur-containing compounds unnecessary.

Abstract: The adhesion between inorganic oxides and photoresistant polymers is improved by, prior to contacting the oxide and the polymer, treating the oxide with(a) an aminosilane of the formulae R.sub.3 SiNHR' and R.sub.2 Si(NHR').sub.2 ; or a polysilazane, with the exception of hexaalkyldisilazanes, having 0.8 to 3 organic groups per silicon atom, and having units of the formulae R.sub.3 Si(NH).sub.0.5, R.sub.2 SiNH, RSi(NH).sub.1.5 or Si(NH).sub.

Abstract: A gas/liquid heat exchanger is provided which comprises means for circulating gas and/or liquid and a plurality of hollow fibres, adapted to receive said gas or said liquid, said fibres being of polymeric material which is inert with respect to said liquid and are permeable to said liquid. Such a heat exchanger considerably improves the efficiency/volume ratio of the appratus, largely as a result of the liquid which permeates through the fibres vaporizing.

Abstract: Anisotropic membranes particularly useful in reverse osmosis because of their good salt rejection properties and high transmission rate are provided which consist essentially of a polymer comprising a plurality of units of the formula ##STR1## in which each of the symbols Q, Q' and Q", which can be identical or different, represents a hydrogen atom, an alkyl radical with 1 to 4 carbon atoms or a --SO.sub.3 H radical, the number of --SO.sub.3 H radicals in the polymer being such that the ionic capacity of the polymer is from about 0.5 to about 5 meg/g, in the form of a layer which exhibits a degree of salt rejection, said layer having an equivalent thickness of from about 0.01 to about 5.mu. , and a highly porous support layer, of thickness up to about 1 mm.

Abstract: New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200.degree. to 300.degree. C, which resins are resins of a three-dimensional polyimide which is obtained by reacting, at between 50.degree. C and 350.degree. C, a bisimide of the general formula: ##STR1## in which Y denotes H, CH.sub.3 or Cl, and A represents a divalent organic radical possessing at least two carbon atoms, a polyamine of the general formula:R (NH.sub.2).sub.xin which x represents an integer at least equal to 2 and R denotes an organic radical of valency x, and an alazine of the general formula:G -- CH .dbd. N -- N .dbd. CH -- Gin which G represents a monovalent aromatic radical, and a polymerizable monomer other than a bis-imide, containing at least one polymerizable vinyl, maleic, allyl or acrylic --CH .dbd. C< group in amounts such that if N.sub.1 represents the number of mols of bis-imide employed, N.sub.

Abstract: A heat resistant heat-curable polymer composition obtained by reacting, between 50.degree. C. and 350.degree. C., (a) an oligomer having the average general formula: ##STR1## in which x represents a number from 0.1 to about 2, R represents a divalent hydrocarbon radical with 1 to 8 carbon atoms, which is derived from an aldehyde or a ketone of the general formula:O.dbd.Rin which the oxygen atom is bonded to a carbon atom of the radical R, and T represents a divalent organic radical possessing 2 to 24 carbon atoms, the free valencies of which are on adjacent carbon atoms and which is derived from an internal anhydride of the general formula: ##STR2## at least 60% of the T radicals in the oligomer containing a polymerizable carbon-carbon double bond, with (b) a polyamine of the general formula:Q(NH.sub.2).sub.yin which y represents an integer at least equal to 2 and Q represents an organic radical of valency y, the relative amounts being such that the oligomer supplies 1.

Abstract: Acrylonitrile-unsaturated sulphonate copolymers are prepared with an increased sulphonate content relative to the sulphonate content in the monomer mixture, in an aqueous heterogeneous phase, by using an aqueous medium of an inorganic halide or nitrate of ammonia or of a metal of group IA or IIA of the Periodic Table.

Abstract: A hollow fiber is provided possessing a continuous longitudinally extending channel free from macromolecular material, said fiber consisting essentially of a copolymer of acrylonitrile and an olefinically unsaturated comonomer containing an optionally salified sulphonic acid group, and possessing micropores of average diameter less than about 100 A, between 40% and 80% of walls of the fiber being empty space. This fiber can be prepared by injecting a solution of a copolymer of acrylonitrile and an olefinically unsaturated comonomer containing an optionally salified sulphonic acid group in at least one polar organic solvent into a spinneret with an annular orifice, and immediately coagulating the inside and the outside of the nascent hollow fibre issuing from the spinneret with a coagulating fluid which is selected from:A. a less than saturated aqueous solution of an inorganic salt, said solution optionally containing up to 40% of a miscible polar organic solvent, andB.

Abstract: Isoindolin-1-one derivatives substituted on the nitrogen atom in the 2-position by an unsubstituted or substituted phenyl radical or a heterocyclic radical having aromatic characteristics, substituted in the 3-position by a 3-amino(or substituted amino)-2-hydroxy-propoxy group, and optionally substituted in the 5- and/or 6-positions by one or two alkoxy radicals or optionally substituted in the 5- and 6-positions by a methylenedioxy radical, possess pharmacodynamic properties, and are especially useful as antiarrhythmic agents.

Abstract: A surface active composition which comprises by weight:A. 45 to 90% of at least one n-alkyl monoether of a polyethylene glycol, containing 4 to 9 --CH.sub.2 CH.sub.2 O-- units, the n-alkyl radicals containing 5 to 15 carbon atoms,B. 5 to 35% of a sodium dialkylsulphosuccinate, the linear or branched alkyl radicals containing 6 to 12 carbon atoms,C. 2 to 17% of at least one acid selected from oleic, linoleic, linolenic and ricinoleic acid andD. 1.5 to 12% of at least one amine selected from triethanolamine and N-hydroxyethylmorpholine;Is used as an emulsifier with diorganopolysiloxanes to form transparent micro-emulsions or transparent gels or to introduce silane cross-linking agents into catalyzed aqueous polysiloxane emulsions to cross-link the emulsion.

Abstract: Sulphones of the formula: ##STR1## in which R is a substituted or unsubstituted alkyl, alkylaryl, aralkyl, or aryl radical, A is a radical containing one or more isoprene units which is saturated, unsaturated, or of the conjugated or unconjugated polyene type, which is unsubstituted or substituted by one or more functional groups, halogen atoms or alkyl groups, and which may be cyclic when the number of isoprene units is at least 2, and Q is hydrogen or a cyclic or acyclic hydrocarbon radical which is saturated, unsaturated, or of the conjugated or unconjugated polyene type, and which is unsubstituted or substituted by one or more functional groups, halogen atoms or alkyl groups are useful intermediates in the production of terpene compounds such as .beta.-carotene and canthaxanthine.

Abstract: Sulphones of the formula: ##STR1## in which R is a substituted or unsubstituted alkyl, alkylaryl, aralkyl, or aryl radical, A is a radical containing one or more isoprene units which is saturated, unsaturated, or of the conjugated or unconjugated polyene type, which is unsubstituted or substituted by one or more functional groups, halogen atoms or alkyl groups, and which may be cyclic when the number of isoprene units is at least 2, and Q is hydrogen or a cyclic or acyclic hydrocarbon radical which is saturated, unsaturated, or of the conjugated or unconjugated polyene type, and which is unsubstituted or substituted by one or more functional groups, halogen atoms or alkyl groups are useful intermediates in the production of terpene compounds such as .beta.-carotene and canthaxanthine.