<p>The present invention relates to a process to prepare salt comprising the following steps: (i) preparing an aqueous salt solution containing at least 100 g/l of sodium chloride and at least 0.01 ppm of polyvalent cations by dissolving a sodium chloride source in industrial water, (ii) adding an effective amount of at least one positive retention enhancing component to the aqueous salt solution, (iii) subsequently subjecting the solution to a nanofiltration step, thereby separating the solution into a retentate which is enriched for the polyvalent cations and a permeate which is the purified aqueous salt solution, and (iv) concentrating the permeate to produce salt.</p>
申请公布号
MX2007010061(A)
申请公布日期
2007.10.10
申请号
MX20070010061
申请日期
2006.02.13
申请人
AKZO NOBEL N.V.
发明人
MAYER, MATEO, JOZEF, JACQUES;DEMMER, RENE, LODEWIJK, MARIA;BARGEMAN, GERRALD;VAN LARE, CORNELIS ELIZABETH JOHANNUS;TEN KATE, ANTOON;KUZMANOVIC, BORIS;SCHUTYSER, MAARTEN ANDRE IRENE;WESTERINK, JAN BAREND