C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
C25B 1/46 (2006.01) C01D 7/07 (2006.01) H01M 8/06 (2006.01)
Patent
CA 2599508
An aqueous solution of sodium chloride is electrolysed in a cell (1) with an ion permselective membrane to produce, on the one hand, chlorine (16) which is converted in a chlorine production unit (6) and, on the other, an aqueous sodium hydroxide solution (19), which is carbonated using a flue gas (13) from an electricity and steam cogeneration unit (5), and the resulting carbonated solution (18) is evaporated to produce sodium carbonate crystals (21).
Cette invention concerne une solution aqueuse de chlorure de sodium électrolysée dans une cellule (1) avec une membrane semi-perméable aux ions afin de produire, d'une part, du chlorure (16) qui est transformé dans une unité de production de chlorure (6) et, d'autre part, une solution aqueuse d'hydroxyde de sodium (19), laquelle est gazéifiée au moyen d'un gaz de combustion (13) provenant d'une unité de production conjointe d'électricité et de vapeur (5). La solution gazéifiée ainsi obtenue (18) est ensuite évaporée pour produire des cristaux de carbonate de sodium (21).
Coustry Francis
Hanse Michel
Robic
Solvay (societe Anonyme)
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