| 主权项 |
1. Process for the preparation of an aqueous solution comprising at least one earth alkali hydrogen carbonate, the process comprising the steps of:
a) providing water, b) providing at least one substance comprising at least one earth alkali carbonate and optionally at least one earth alkali hydroxide in a minor amount in respect to the earth alkali carbonate, the at least one substance being in a dry form or in an aqueous form, c) providing CO2, d) combining either:
(i) the water of step a), the at least one substance comprising at least one earth alkali carbonate and the optional at least one earth alkali hydroxide of step b) and the CO2 of step c), or(ii) the water of step a) and the at least one substance comprising at least one earth alkali carbonate and the optional at least one earth alkali hydroxide of step b) in order to obtain an alkaline aqueous suspension of the at least one substance comprising at least one earth alkali carbonate and the optional at least one earth alkali hydroxide, and subsequently combining the alkaline aqueous suspension with the CO2 of step c)in order to obtain a resulting suspension S having a pH of between 6 and 9, the resulting suspension S containing particles, e) filtering at least a part of the resulting suspension S that is obtained in step d) by passing the resulting suspension S through a filtering device in order to obtain the aqueous solution comprising at least one earth alkali hydrogen carbonate, wherein the particles of the resulting suspension S that is obtained in step d) represent a total particle surface area (SSAtotal) that is >20 000 m2/tonne of the resulting suspension S, and with the proviso that an addition of the CO2 of step c) does not take place before an addition of the at least one substance comprising at least one earth alkali carbonate and the optional at least one earth alkali hydroxide of step b). |
