C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
C25B 1/24 (2006.01) C25B 1/26 (2006.01) C25B 9/00 (2006.01) C25B 9/10 (2006.01)
Patent
CA 2219922
The present invention relates to an electrochemical cell, system and process for converting essentially anhydrous hydrogen halide to essentially dry halogen gas. The process of the present invention is useful for converting anhydrous hydrogen halide, in particular, hydrogen chloride, hydrogen fluoride, hydrogen bromide and hydrogen iodide, to a halogen gas, such as chlorine, fluorine, bromine, or iodine. In particular, in the present invention, water is provided to the cation-transporting membrane at the cathode in various ways. The present invention allows for recovery of a released fluid at the cathode side of the membrane and recycling of the recovered fluid back to the cathode side of the membrane. In this way, the recovered, released fluid may be recycled to continuously supply water to the membrane, thereby allowing the limiting current density of the cell to be increased and/or controlled.
L'invention porte sur une cellule, un système et un procédé électrochimiques servant à convertir de l'halogénure d'hydrogène quasiment anhydre en gaz halogène quasiment sec. Le procédé de l'invention s'avère utile pour convertir de l'halogénure d'hydrogène anhydre, en particulier, du chlorure d'hydrogène, du fluorure d'hydrogène, du bromure d'hydrogène et du iodure d'hydrogène en gaz halogène, tel que du chlore, du fluor, du brome ou de l'iode. Dans cette invention, en particulier, on approvisionne en eau la membrane à transport cationique au niveau de la cathode de différentes manières. L'invention permet de récupérer un fluide libéré côté cathode et de retourner après recyclage le fluide récupéré au côté cathode de la membrane. On peut ainsi recycler le fluide récupéré qui a été libéré pour alimenter la membrane en eau, ce qui permet d'augmenter et/ou de réguler la densité de courant limite de la cellule.
Eames Douglas John
Freire Francisco Jose
Law Clarence Garlan Jr.
Newman John Scott
Tatapudi Pallav
Dimock Stratton Llp
E. I. Du Pont de Nemours And Company
University Of South Carolina Research Foundation
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