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    • 3. 发明授权
    • Crystallization processes for producing bisphenols
    • 生产双酚的结晶过程
    • US07763757B2
    • 2010-07-27
    • US11971268
    • 2008-01-09
    • Christian MünnichUlrich BlaschkeRob EekMichael PreinRaymond AudenaertGert Tytgat
    • Christian MünnichUlrich BlaschkeRob EekMichael PreinRaymond AudenaertGert Tytgat
    • C07C37/84C07C39/16
    • C07C37/20C07C37/84C07C39/16
    • Processes for producing bisphenols (e.g., bisphenol A (BPA)) having a purity greater than 99.7% are described, such processes including reacting a phenol and acetone in the presence of an acidic catalyst to form a product mixture comprising a bisphenol; removing at least a portion of the bisphenol from the product mixture in the form of a bisphenol/phenol adduct by crystallization, filtration and washing to provide bisphenol/phenol adduct crystals; and removing at least a portion of the phenol from the bisphenol/phenol adduct crystals to provide the bisphenol having a purity of more than 99.7%; wherein the crystallization comprises continuous suspension crystallization and is carried out in at least three crystallization devices arranged such that the product mixture is first cooled in a first stage of the crystallization to a temperature of 50 to 70° C. in a first crystallization device and a second crystallization device connected in parallel, and subsequently cooled in a second stage of the crystallization to a temperature of 40 to 50° C. in a third crystallization device connected downstream in series to the first and second crystallization devices, and wherein a total dwell time of the product mixture in the crystallization is more than 4 hours.
    • 描述了用于生产纯度大于99.7%的双酚(例如双酚A(BPA))的方法,包括在酸性催化剂存在下使苯酚和丙酮反应以形成包含双酚的产物混合物; 通过结晶,过滤和洗涤从双酚/苯酚加合物的形式从产物混合物中除去至少一部分双酚以提供双酚/苯酚加合物晶体; 并从双酚/苯酚加合物晶体中除去至少一部分苯酚,得到纯度大于99.7%的双酚; 其中所述结晶包括连续悬浮液结晶,并且在至少三个结晶装置中进行,所述结晶装置被排列成使得产物混合物在结晶的第一阶段首先在第一结晶装置中冷却至50至70℃, 第二结晶装置并联连接,随后在结晶的第二阶段中在与第一和第二结晶装置串联下游的第三结晶装置中冷却至40至50℃的温度,并且其中总停留时间 的产物混合物在结晶中超过4小时。
    • 10. 发明授权
    • Purification of tris-hydroxyaryl compounds
    • 三羟基芳基化合物的纯化
    • US08507732B2
    • 2013-08-13
    • US13081811
    • 2011-04-07
    • Christian MünnichStephan KonradKarl-Heinz Köhler
    • Christian MünnichStephan KonradKarl-Heinz Köhler
    • C07C39/16C07C37/82
    • C07C37/82C07C39/16
    • The present invention is directed to a composition comprising a tris-hydroxyaryl compound having a metal ion impurity content of less than 10 ppm and to a process for the purification of tris-hydroxyaryl compound having a metal ion impurity, comprising at least the following steps: a) conditioning a sulphonic acid group-containing active ion exchanger with a solvent which is suitable for the handling of the tris-hydroxyaryl compounds, b) producing a solution of the tris-hydroxyaryl compounds to be purified in a solvent which is suitable for the handling of the tris-hydroxyaryl compounds, c) contacting the tris-hydroxyaryl compound-containing solution from b) with the conditioned ion exchanger from a), d) separating the tris-hydroxyaryl compound-containing solution from c) from the conditioned ion exchanger, e) removing at least part of the solvent from the solution of the tris-hydroxyaryl compound separated in d) under low temperature stress.
    • 本发明涉及包含金属离子杂质含量小于10ppm的三羟基芳基化合物和纯化具有金属离子杂质的三羟基芳基化合物的方法的组合物,至少包括以下步骤: a)用适合于处理三羟基芳基化合物的溶剂调节含磺酸基团的活性离子交换剂,b)产生待纯化的三羟基芳基化合物在适合于 处理三羟基芳基化合物,c)使来自b)的三羟基芳基化合物的溶液与a)的调节离子交换剂接触,d)从调节离子交换器中分离含有三羟基芳基化合物的溶液与c) ,e)在低温应力下从d)中分离的三羟基芳基化合物的溶液中除去至少一部分溶剂。