Hydro-quebec

Michel Gauthier

Christophe Michot

Abdelbast Guerfi

Karim Zaghib

Jocelyn Jalbert

Martin Dontigny

Patrick Charest

Roland Gilbert

Hong Phuong Nguyen

René J Demers

Process for the purification of an ionic electrolyte including at least one alkali metal salt, the process having at least one stage in which particles of at least one calcium salt are brought into contact. The process makes it possible to obtain electrolytes characterized in particular by particularly low water content. The corresponding electrochemical generators which incorporate the electrolyte as constituent component are characterized by a noteworthy stability and are particularly safe.

Electrolyte purification method using calcium carbide, and electrolytes thus obtained

Process for the purification of an ionic electrolyte comprising at least one alkali metal salt, the process having at least one stage in which particles of at least one calcium salt are brought into contact. The process makes it possible to obtain electrolytes characterized in particular by a particularly low water content. The corresponding electrochemical generators which incorporate the electrolyte as constituent component are characterized by a noteworthy stability and are particularly safe.

The present invention relates to an apparatus for measuring the capacitance and the dissipation factor in a transformer bushing and extracting gas dissolved in the insulating fluid of said bushing. The apparatus comprises a porous cylindrical member associated with a tap connector and covered by a thin layer of a gas permeable but liquid impermeable membrane. The porous member allows passive diffusion of the permeated gas extracted from the insulating fluid of a transformer bushing to a gas storage chamber for further analysis, thereby helping to prevent high costs related to damage or destruction of the bushing.

Test tap adapter for extracting dissolved gases from insulating oil and measuring electrical parameters of a transformer bushing

An oil, such as a mineral oil, for example, transformer oil, is contacted with calcium carbide and the mixture is stirred until a liquid phase containing less than 1 ppm water and a solid phase containing Ca(OH) and unreacted CaC are obtained. The oil obtained can be used to give samples of known quantities of water by adding corresponding amounts thereto.

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Repentigny, Canada

Jocelyn Jalbert