Processes for the production of particle reactive composition and for purification of tail gas, particle reactive composition, and composition.

摘要

Process for the production of particle reactive composition comprising at least 60% by weight of sodium carbonate and having a specific surface area of bet at least 4 m2 / g,According to which the particles on the basis of sodium bicarbonate and / or sodium sesquicarbonate having a median particle size D50 smaller than (35) u00b5 m are placed in contact with a stream of hot gases having a temperature of at least 100 u00b0 C to convert the bicarbona To sodium in sodium carbonate by calcination.The stream of hot gases comprising particles calcined and subsequently subjected to a stage of separation in order to obtain, on the one hand, the particles reactive composition and, on the other hand, a separate stream of hot gases including CO2 and steam, the flow separates The hot gases being at least partially recycled upstream of the separation stage.