Process for the preparation of monohydrated sodium carbonate...

C - Chemistry – Metallurgy – 01 – D

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23/19

C01D 7/24 (2006.01) C01D 7/35 (2006.01)

Patent

CA 1109634

PRECIS DE LA DIVULGATION: L'invention concerne un procédé pour cristalliser du carbonate de sodium monohydraté au départ de solutions carbo- natées d'hydroxyde de sodium, le carbonate de sodium monohydra- té étant cristalisé in situ sur des germes cristallins de carbonate de sodium monohydraté obtenus par évaporation, entre 35 et 107,5°C, d'une solution aqueuse de carbonate de sodium exempte d'hydroxyde de sodium et l'invention s'appliquant à l'obtention de cristaux de carbonate de sodium monohydraté, par carbonatation des lessives caustiques obtenues par électrolyse de saumures de chlorure de sodium.

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