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    • 2. 发明申请
    • PROCESSES INVOLVING THE USE OF ANTISOLVENT CRYSTALLIZATION
    • 涉及使用抗溶剂结晶的过程
    • WO2006045795A2
    • 2006-05-04
    • PCT/EP2005/055527
    • 2005-10-25
    • AKZO NOBEL N.V.BARGEMAN, GerraldDEMMER, René, Lodewijk, MariaTEN KATE, AntoonKUZMANOVIC, BorisVAN LARE, Cornelis, Elizabeth, JohannusMAYER, Mateo, Jozef, JacquesSCHUTYSER, Maarten, André, IrèneVAN STRIEN, Cornelis, Johannes, Govardus
    • BARGEMAN, GerraldDEMMER, René, Lodewijk, MariaTEN KATE, AntoonKUZMANOVIC, BorisVAN LARE, Cornelis, Elizabeth, JohannusMAYER, Mateo, Jozef, JacquesSCHUTYSER, Maarten, André, IrèneVAN STRIEN, Cornelis, Johannes, Govardus
    • C01D3/16C01D3/06
    • The present invention pertains to a process involving the use of an antisolvent comprising the steps of - feeding water to a salt source to form an aqueous solution comprising said salt if the salt source is not yet in the form of an aqueous salt solution, - feeding said aqueous solution to a crystallizer/settler, - contacting said aqueous solution with one or more antisolvents which force the salt to at least partly crystallize, with one or more crystal growth inhibitors being present in the antisolvents and/or in the aqueous solution, and/or one or more scaling inhibitors being present in the antisolvents and/or in the aqueous solution, - subjecting an overflow of the crystallizer/settler comprising one or more antisolvents and an aqueous salt solution to a separation step wherein one or more antisolvents are separated from the aqueous salt solution by one or more techniques selected from the group consisting of adsorption, ion-exchange, a temperature change induced phase split, a pH change induced phase split, a complexation induced phase split, a pressure induced phase split, evaporation, and extraction, optionally in combination with a nanofiltration step, - removing the crystallized salt from the crystallizer/settler in an aqueous slurry, - optionally, recycling the one or more antisolvents to the crystallizer/settler, and - optionally, recycling mother liquor from the slurry to the first dissolution step and/or to the crystallizer/settler. Preferably, the process is a closed loop process and the salt is sodium chloride. Preferably, the process further comprises a reverse osmosis step before the overflow of the crystallizer/settler is subjected to the separation step.
    • 本发明涉及涉及使用抗溶剂的方法,所述方法包括以下步骤: - 如果盐源尚未处于形式,则将水供给至盐源以形成包含所述盐的水溶液 - 将所述水溶液加入结晶器/沉降器中, - 将所述水溶液与一种或多种抗溶剂接触,所述抗溶剂迫使盐至少部分结晶,其中一种或多种晶体生长抑制剂存在于抗溶剂中,和 /或在水溶液中,和/或一种或多种结垢抑制剂存在于抗溶剂和/或水溶液中, - 使包含一种或多种抗溶剂和盐水溶液的结晶器/沉降器的溢流经受分离 其中通过选自以下的一种或多种技术从盐水溶液中分离出一种或多种抗溶剂:吸附,离子交换,温度变化诱导的相 分离,pH变化诱导相分离,络合诱导相分离,压力诱导相分离,蒸发和萃取,任选地与纳米过滤步骤组合, - 在含水浆液中从结晶器/沉降器中除去结晶盐, - 任选地,将所述一种或多种反溶剂再循环至结晶器/沉降器,以及 - 任选地将母液从淤浆循环至第一溶解步骤和/或结晶器/沉降器。 优选地,该过程是闭环过程并且盐是氯化钠。 优选地,该方法还包括在结晶器/沉降器溢流进行分离步骤之前的反渗透步骤。