process for separating alkaline earth metal silicates and carbonates, products containing alkaline earth metal carbonate and containing silicate, and using the products

摘要

process for separating alkaline earth metal silicates and carbonates, products containing alkaline earth metal carbonate and containing silicate, and use the products. The invention relates to a process for separating alkaline earth metal silicates and carbonates which implements at least one hydrophobically modified polyalkyleneimine, wherein: i) the polyalkyleneimine is hydrophobically modified by substituting all or part of the hydrogens for groups thereof primary and / or secondary amino by functional group r, where r comprises a linear or branched or cyclic alkyl and / or aryl group and contains 1 to 32 carbon atoms; ii) prior to modification, polyalkyleneimine has at least 3 alkyleneimine repeat units and a molecular weight of between 140 and 100,000 g / mol; iii) the modification of polyalkyleneimine results in an increase in the amount of atomic compared to unmodified polyalkyleneimine, between and 80%. The invention further relates to a silicate-containing product and an earth alkanyl metal carbonate-containing product obtained by the process of the invention, to their uses.