Abstract: A process for the preparation of N-monoallyl-meta-trifluoromethyl aniline, by condensing meta-bromo-trifluoromethyl benzene with allylamine in the presence of a nickel (II) catalyst.

Abstract: The polychlorophenols, e.g., 2,6-dichlorophenol (a known agrochemical intermediate), are effectively prepared by chlorinating ortho-chlorophenol with gaseous chlorine, optionally in the presence of other chlorophenols, characteristically in the molten state, and in the presence of a catalytically effective amount of a primary, secondary or tertiary amine.

Abstract: The preparation of 4,4'-dibromobiphenyl. A biphenyl is reacted with bromine in a solvent in the presence of a catalytic system based on at least one component selected from the group consisting of Lewis acids and iodine.

Abstract: A process for the allylation of perhaloalkyl-, perhaloalkoxy- and perhaloalkylthioanilines. A perhaloalkylated-, perhaloalkoxylated- and perhalothioalkylated aniline and an allyl halide in a solvent medium are placed in contact with an effective amount of a metal selected from palladium, copper and nickel.

Abstract: Ortho-substituted phenolic compounds, e.g., 2,6-dichlorophenol, are selectively chlorinated, e.g., into 2,4,6-trichlorophenol, with gaseous chlorine in either the molten state or in a solvent medium, in the presence of a selectivity-enhancing effective amount of an organic cation.

Abstract: A process for the preparation of N-acyl-N-allylaniline. A solution of diallylaniline or a mixture of monoallyl and diallylaniline is placed in contact with a carboxylic acid halide.

Abstract: The ortho-substituted phenols, e.g., 2,6-dichlorophenol, are reacted with gaseous chlorine, in the presence of a catalytically effective amount of a strong or Lewis acid, to produce, e.g., a more pure 2,4,6-trichlorophenol in good yield.

Abstract: The chlorophenols, e.g., 2,4,6-trichlorophenol, are efficiently prepared by chlorinating an ortho-/para-substituted phenolic compound with gaseous chlorine, whether in molten state or in a solvent reaction medium, in the presence of a catalytically effective amount of a primary, secondary or tertiary amine.

Abstract: Mixtures produced by chlorination of phenol/chlorophenols are effectively stabilized by stirring same in the presence of a stabilizing amount of at least one reducing compound that is a chlorine acceptor.

Abstract: The chloronitrophenols, e.g., 2,6-dichloro-4-nitrophenol (a known agrochemical/pharmaceutical intermediate), are efficiently prepared by chlorinating ortho- or para-nitrophenol with gaseous chlorine, characteristically in the molten state, and in the presence of a catalytically effective amount of a primary, secondary or tertiary amine.

Abstract: Mixtures produced by chlorination of phenol/chlorophenols are effectively stabilized by stirring same in the presence of a stabilizing amount of at least one strong protonic acid and/or a Lewis acid.

Abstract: This invention relates to a trapping tube characterized in that it is constituted by a shaped tube comprising:a first section or zone of condensation of the separated gaseous phase delivered by the outlet of the chromatograph,a second section or zone of confinement of the condensate of the separated gaseous phase,and a third section or zone of evacuation of the vector gas of the separated gaseous phase. The invention is more particularly applicable to the obtaining of condensates in a small, even infinite quantity.

Abstract: The machine comprises an electric driving motor, a speed reducer having at least two mechanical ratios coupled to the output shaft of the motor, a device for changing the mechanical ratio and a speed variator of the electric motor. The machine further comprises devices (7, 35, 36, 41) for selecting and displaying the speeds of rotation of the electric motor coupled to the device for changing the mechanical ratio.

Abstract: A dynamic device for holding the foot and the leg in position in a rigid structure consisting of shells or fastening elements, wherein there is at least a pump operated by the motions of the leg which is associated with at least an element for adjusting the pressure, with at least a valve and an assembly of fluid-chocks, the whole participating to the immobilization of the foot and the leg in the rigid structure.

Abstract: The variator comprises a triggerable silicon-controlled rectifier component for connection in series with the a.c. motor to the a.c. source, and a phase-shifting circuit connected to the terminals of the rectifier component and comprising a capacitive branch and a resistive branch which has a regulating potentiometer. The junction between these two branches is connected to the control electrode of the rectifier component. A unidirectional semiconductor component responsive to voltage is connected in parallel with the capacitive branch and a part of the resistive branch in which the potentiometer is inserted. The resistive branch comprises connected in parallel a first branch comprising a first resistor and the potentiometer and a second branch comprising a second resistor and a third resistor. The junction between the second and third resistors is connected to the slide of the potentiometer and the unidirectional component is connected to the junction between the potentiometer and the first resistor.

Abstract: A device for limiting the current in an a.c.motor having a commutator adapted to be supplied with current by a single-phase current source. The device comprising a triggerable silicon-controlled rectifier component connected in series with the motor and in parallel with an RC phase-shifting circuit furnishing the control voltage of the rectifier component. The capacitive branch of the RC circuit is connected in parallel with a shunt circuit which shunts a certain quantity of the charging current of the branch for modifying the trigger instants of the rectifier component. The shunt circuit comprises two transistors of opposed conductivity types which are connected with a common emitter configuration, the collector-emitter circuits of the transistors being connected in parallel with the capacitive branch. The limiting device further comprises a control circuit furnishing two d.c.

Abstract: A storage target comprising a photosensitive diode array which can be used to convert an optical image into an electronic image where the photo diodes are constituted by "hyper abrupt" junctions having a junction capacitance of wide dynamic range when reverse biased and having consequently a remanence which is variable as a function of the reverse voltage applied to them.