Brief description of the regeneration of brines containing sulphites and / or sulphates of alkali metals

摘要

P the invention relates to a method for regeneration of brines containing sulphites and / or of sulfates of sodium in producing the sulfur dioxide and the sodium carbonate or sodium sulphite / p & & p & the method consists in acidifying the brines by means of sodium bisulfate and ammonium bisulfate to produce the sulfur dioxide and to treat the residual solution of the carbon dioxide and ammonia, in order to obtain the sodium bicarbonate and then heated in order to produce the sodium carbonate or that are placed in contact with a portion of the brine to be regenerated in order to obtain the sodium sulphite. / p & & p & the process is applicable to the treatment of brines from plants with sulphuric acid or of the absorption of the oxides of sulphur contained in the flue gases emanating from power stations, for example. / p