Atochem

Pechine Ugine Kuhlmann

Michel Jaccaud

Francis Leroux

Henri Mathais

Jean Blaise

Charles Laviron

Dominique Ravier

Jean-Christophe Millet

Michel Perrot

The alkali metal perchlorates, e.g., sodium perchlorate or hydrate thereof, are continuously produced by continuously electrolyzing an aqueous solution electrolyte of a corresponding alkali metal chlorate in a single stage, while maintaining such electrolyte homogeneous and compositionally uniform over time by the continuous and simultaneous introduction of alkali metal chlorate and water thereto, and continuously directly separating desired alkali metal perchlorate from such solution of electrolysis.

Continuous electrolytic production of alkali metal perchlorates

The invention pertains to a perfluorated ionic polymer. This polymer is prepared starting with polymers presenting carboxylic groupings, these groupings being transformed in reactive entities which are later eliminated.

Fluorated ionic polymer, method for its preparation and membranes

A process for the preparation of an organic trihalomethyl derivative comprising electrolytically reducing a compound of the formula:

Process for the preparation of certain organic trihalomethyl derivatives

A physico-chemical cleaning process for the inner walls of a reactor which serves to maintain these walls in a state close to their main initial characteristics necessitated by a fluorination reaction, said characteristics being degraded by the deposition of a parasitic phase during the reaction, said initial characteristics being maintained by the use of a protective agent belonging to the group constituted by at least one of the reagents, a product resulting from the reaction, a product foreign to the reaction, but compatible with the substances of the main reaction or by the reaction of a third substance with at least one of the reaction substances or a mixture thereof, forming a renewable protective film on the said walls. The protective agent can be deposited by condensation on the walls before, during or after the main reaction, and then vaporized. The protective agent can be in liquid form, and trickling along the walls.

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Lyons, France

Michel Jaccaud