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    • 7. 发明授权
    • Purification of caustic soda
    • 苛性钠的净化
    • US6113657A
    • 2000-09-05
    • US41691
    • 1998-03-13
    • Dieter SchlaferMichael MaussMatthias RaulsDieter Baumann
    • Dieter SchlaferMichael MaussMatthias RaulsDieter Baumann
    • C01D1/30
    • C01D1/30
    • In a process for preparing crystalline NaOH.3.5H.sub.2 O, NaOH.3.5H.sub.2 O is allowed to crystallize from an aqueous sodium hydroxide solution which contains sodium chloride and is saturated in respect of NaOH.3.5H.sub.2 O and the crystals formed are separated from the solution using a mechanical solid/liquid separation apparatus, wherein the solid/liquid separation is carried out under conditions under which the crystalline NaOH.3.5H.sub.2 O is freed sufficiently of residual solution adhering to the surface for the sodium chloride content of the crystalline NaOH.3.5H.sub.2 O obtained to be less than 100 mg per kg. The crystalline NaOH.3.5H.sub.2 O is subjected to an additional purification step, which may include the at least superficial melting or the at least superficial dissolution of the crystals, in combination with a solid/liquid separation step. The additional purification step. The additional purification step comprises washing the crystalline NaOH.3.5H.sub.2 O separated off.
    • 在制备结晶NaOH.3.5H2O的方法中,使NaOH.3.5H2O从含有氯化钠的氢氧化钠水溶液中结晶,并且在NaOH.3.5H 2 O下饱和,并将形成的晶体与溶液分离,使用 机械固/液分离装置,其中固/液分离在结晶NaOH.3.5H2O充分释放残留溶液附着在表面上的条件下进行,得到的结晶NaOH.3.5H2O的氯化钠含量为 小于100mg / kg。 结晶NaOH.3.5H2O经受另外的纯化步骤,其可以包括与固/液分离步骤组合的晶体的至少表面熔融或至少表面溶解。 额外的净化步骤。 另外的纯化步骤包括洗涤析出的结晶NaOH.3.5H2O。
    • 9. 发明申请
    • Method of Separating Acids from Chemical Reaction Mixtures by Means of Apolar Amines
    • 通过非极性胺分离酸与化学反应混合物的方法
    • US20080287709A1
    • 2008-11-20
    • US12092392
    • 2006-09-15
    • Oliver HuttenlochPatrick DeckHolger GanzMichael MaussWolfgang KornigMichael Bock
    • Oliver HuttenlochPatrick DeckHolger GanzMichael MaussWolfgang KornigMichael Bock
    • C07F9/22B01D1/00B01D11/04
    • C07F9/224C07B63/00
    • A process for the removal of acids from reaction mixtures, comprising at least one product of value which is sparingly soluble in water, by at least one unpolar amine as an auxiliary base, which includes: a) reacting the auxiliary base with the acid with formation of a salt; b) reacting the salt formed in step a) with a further base which accepts the acid with liberation of the auxiliary base and combines with the acid to be accepted from the auxiliary base to form a salt which is very readily soluble in water; c) extraction of the mixture obtained in step b) with water or an aqueous medium, wherein the salt of the further base dissolves in the aqueous phase and the product of value, or the solution of the product of value, in a suitable solvent and the auxiliary base form at least one separate nonaqueous phase; and d) removal by distillation of at least part of any solvent present from the at least one nonaqueous phase obtained in step c), to form two nonmiscible liquid phases.
    • 通过至少一种非极性胺作为辅助碱从反应混合物中除去酸的方法,该方法包括至少一种值得微溶于水的产物,其包括:a)使辅助基质与酸与形成物反应 的盐 b)使步骤a)中形成的盐与另外的碱反应,其另外的碱可以通过辅助碱的释放与酸接触,并与待辅助的酸结合,形成非常容易溶于水的盐; c)用水或水性介质萃取步骤b)中得到的混合物,其中另外碱的盐溶解在水相中,并且将有价值的产物或产品的溶液在合适的溶剂中溶解, 辅助碱形成至少一个分离的非水相; 和d)通过蒸馏除去存在于步骤c)中获得的至少一种非水相中的任何溶剂的至少一部分,以形成两个不可混溶的液相。