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.
申请公布号
CA2598339(C)
申请公布日期
2013.09.24
申请号
CA20062598339
申请日期
2006.02.13
申请人
AKZO NOBEL N.V.
发明人
BARGEMAN, GERRALD;DEMMER, RENE LODEWIJK MARIA;TEN KATE, ANTOON;KUZMANOVIC, BORIS;VAN LARE, CORNELIS ELIZABETH JOHANNUS;MAYER, MATEO JOZEF JACQUES;SCHUTYSER, MAARTEN ANDRE IRENE;WESTERINK, JAN BAREND