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公开(公告)号：EP1407805A1
公开(公告)日：2004-04-14
申请号：EP02078710.7
申请日：2002-09-10
IPC分类号： B01D9/02
CPC分类号： B01D9/0013 , B01D9/0059
摘要： The invention relates to a crystallization method for forming crystals of a substance in a solution, a suspension, or a mixture of liquids, in particular ice crystals from an aqueous solution or organic crystals from an organic melt. The method comprises the steps of crystallizing the solution to form a crystal slurry by means of cooling in a heat exchanger and feeding the crystal slurry from an outflow side of the heat exchanger to an inflow side of the heat exchanger via a recirculation duct and separating at least a part of the crystals from the liquid. A recirculation pump is included in the recirculation duct wherein the slurry is continuously supplied through the recirculation duct such that the crystals are homogeneously distributed in the duct and the heat exchanger and such that the under cooling at the outlet of the heat exchanger is the equilibrium temperature T eq minus 0.5 to 0.9 times the meta-stable region ΔT max .
摘要翻译： 用于在溶液，悬浮液或液体混合物中形成晶体的结晶方法，特别是来自有机熔体的水溶液或有机晶体的冰晶，包括将再循环泵包括在再循环管道中，其中晶体浆料 通过管道连续供应，使得晶体均匀分布在管道和热交换器中。 用于在溶液，悬浮液或液体混合物中形成晶体的结晶方法，特别是来自水溶液的冰晶体或来自有机熔体的有机晶体的结晶方法包括使溶液结晶以通过在 热交换器; 将所述晶体浆料从所述热交换器的流出侧经由再循环管道供给到所述热交换器的流入侧; 并将一部分晶体与液体分离。 再循环泵（6）包括在再循环管道中，其中浆料通过再循环管道连续供应，使得晶体均匀分布在管道和热交换器中，并且使得在出口（4）处的冷却 热交换器是平衡温度（Teq）减去元稳定区域的0.5-0.9倍（ΔTmax）。 还包括用于结晶器组件的独立权利要求，其包括具有入口（3）和用于形成晶体浆料的出口的热交换器; 连接在入口和出口之间用于再循环晶体浆料并在热交换器中从出口到入口形成的再循环管道（5） 和连接到热交换器上以从浆料中分离晶体的分离器（8）。 在热交换器的出口和入口之间的再循环路径中不包括过滤器或分离器。
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公开(公告)号：EP1970349A2
公开(公告)日：2008-09-17
申请号：EP08152753.3
申请日：2008-03-14
IPC分类号： C01B25/234 , C01B25/238
CPC分类号： C01B25/234 , C01B25/238
摘要： The invention relates to a method for the purification or recovery of orthophosphoric acid rich streams by suspension-based melt crystallization. The orthophosphoric acid is crystallized as the hemi-hydrate form and subsequent separation of such crystals in a wash-column produce a high purity acid/water solution that has been depleted of most of the metals and impurities other than water, thereby separating an orthophosphoric acid rich feed liquor into an ultra-pure orthophosphoric acid hemi-hydrate and a mother liquor containing almost all impurities originally present in the feed. The orthophosphoric acid rich feed liquor typically contains no more than 15wt% water and 1wt% other impurities. Individual metal ion composition in the purified orthophosphoric acid product is in the range of 100 to1000 ppb (parts per billion = 1/1000 ppm) of each metal ion. The metal ion composition of the resulting purified product is thus typically below the detection limit of typical analysis equipment.
摘要翻译： 本发明涉及通过基于悬浮液的熔融结晶来纯化或回收富含正磷酸的料流的方法。 正磷酸作为半水合物形式结晶，随后在洗涤塔中分离这种晶体产生高纯度的酸/水溶液，其已经耗尽大部分除水以外的金属和杂质，从而分离出正磷酸 富含原料液转化为超纯正磷酸半水合物和含有原料存在于饲料中几乎所有杂质的母液。 正磷酸的进料液体通常含有不超过15重量％的水和1重量％的其它杂质。 纯化的正磷酸产物中的各种金属离子组成在每个金属离子的100至1000ppb（每十亿分之一1/1000ppm）的范围内。 因此，所得纯化产物的金属离子组成通常低于典型分析设备的检测限。
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公开(公告)号：EP1407805B1
公开(公告)日：2005-05-11
申请号：EP02078710.7
申请日：2002-09-10
IPC分类号： B01D9/02
CPC分类号： B01D9/0013 , B01D9/0059
摘要： A crystallization method for forming crystals of a substance in a solution, a suspension, or a mixture of liquids, in particular ice crystals from an aqueous solution or organic crystals from an organic melt, involves including a recirculation pump in a recirculation duct where crystal slurry is continuously supplied through the duct, such that crystals are homogeneously distributed in the duct and a heat exchanger. A crystallization method for forming crystals of a substance in a solution, a suspension, or a mixture of liquids, in particular ice crystals from an aqueous solution or organic crystals from an organic melt, comprises crystallizing the solution to form crystal slurry by cooling in a heat exchanger; feeding the crystal slurry from an outflow side of the heat exchanger to an inflow side of the heat exchanger via a recirculation duct; and separating a part of the crystals from the liquid. A recirculation pump (6) is included in the recirculation duct where the slurry is continuously supplied through the recirculation duct, such that the crystals are homogeneously distributed in the duct and the heat exchanger and such that the under cooling at an outlet (4) of the heat exchanger is an equilibrium temperature (Teq) minus 0.5-0.9 times a meta-stable region (delta Tmax). An independent claim is also included for a crystallizer assembly, comprising a heat exchanger having an inlet (3) and an outlet for forming crystal slurry; a recirculation duct (5) connected between the inlet and the outlet for recirculation of the crystal slurry, and formed in the heat exchanger from the outlet to the inlet; and a separator (8) connected to the heat exchanger for separating crystals from the slurry. No filter or separator is included in a recirculation path between the outlet and the inlet of the heat exchanger.
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公开(公告)号：EP1970349B1
公开(公告)日：2017-09-27
申请号：EP08152753.3
申请日：2008-03-14
IPC分类号： C01B25/234 , C01B25/238
CPC分类号： C01B25/234 , C01B25/238
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5.发明公开Method and apparatus for recovering a pure substance from an impure solution by crystallization 有权用于从通过结晶的不纯溶液中回收纯物质的方法和装置
公开(公告)号：EP1398064A1
公开(公告)日：2004-03-17
申请号：EP02078711.5
申请日：2002-09-10
IPC分类号： B01D9/02
CPC分类号： B01D9/0013 , B01D9/004 , B01D9/0059
摘要： The invention relates to an apparatus for the purification of a substance from a solution, a suspension or a mixture of liquids by crystallization, preferably in a continuous manner. The apparatus comprises a first crystallizer (1c) comprising an input (1) for receiving a liquid comprising the substance and an output (4) for discharging a slurry of liquid and crystals. The apparatus comprises also a first separator (1s) connected to the output 4 of the first crystallizer (1c) having a product output (2), and being with a residue output (5) connected to an input of a second crystallizer (2c), and a second separator (2s) being with an input connected to an output (6) of the second crystallizer (2c), a crystal output (7) of the second separator (2s) being connected to an input of the first crystallizer (1c).
摘要翻译： 的纯化级结晶（1c）中接收的液体，其包括该物质，并排出物质的液体和晶体的浆料。 甲分离器接收的浆料，和残渣输出到回收阶段结晶器（2c）和所述物质的纯晶体。 的分离器从结晶器（2c）的接收晶体和液体残留物的浆液，并输出该物质的晶体到结晶（1C）。 因此独立claimsoft包括用于物质的纯化方法。
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公开(公告)号：EP1970349A3
公开(公告)日：2009-09-02
申请号：EP08152753.3
申请日：2008-03-14
IPC分类号： C01B25/234 , C01B25/238
CPC分类号： C01B25/234 , C01B25/238
摘要： The invention relates to a method for the purification or recovery of orthophosphoric acid rich streams by suspension-based melt crystallization. The orthophosphoric acid is crystallized as the hemi-hydrate form and subsequent separation of such crystals in a wash-column produce a high purity acid/water solution that has been depleted of most of the metals and impurities other than water, thereby separating an orthophosphoric acid rich feed liquor into an ultra-pure orthophosphoric acid hemi-hydrate and a mother liquor containing almost all impurities originally present in the feed. The orthophosphoric acid rich feed liquor typically contains no more than 15wt% water and 1wt% other impurities. Individual metal ion composition in the purified orthophosphoric acid product is in the range of 100 to1000 ppb (parts per billion = 1/1000 ppm) of each metal ion. The metal ion composition of the resulting purified product is thus typically below the detection limit of typical analysis equipment.
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7.发明授权Method and apparatus for recovering a pure substance from an impure solution by crystallization 有权用于从通过结晶的不纯溶液中回收纯物质的方法和装置
公开(公告)号：EP1398064B1
公开(公告)日：2005-07-27
申请号：EP02078711.5
申请日：2002-09-10
IPC分类号： B01D9/02
CPC分类号： B01D9/0013 , B01D9/004 , B01D9/0059
摘要： A purification stage crystallizer (1c) receives a liquid comprising the substance, and discharges a slurry of liquid and crystals of the substance. A separator receives the slurry, and outputs a residue to a recovery stage crystallizer (2c) and pure crystals of the substance. A separator receives a slurry of crystals and liquid residue from the crystallizer (2c) and outputs crystal of the substance to crystallizer (1c). An independent claim is also included for a method for purification of a substance.
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