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    • 2. 发明申请
    • MANUFACTURING PROCESS OF PURIFIED LACTIC ACID
    • 纯化乳酸的制造工艺
    • US20130052703A1
    • 2013-02-28
    • US13592373
    • 2012-08-23
    • Kenichiro OKAToshiaki MATSUOMasayuki KAMIKAWANaruyasu OKAMOTOTakeyuki KONDO
    • Kenichiro OKAToshiaki MATSUOMasayuki KAMIKAWANaruyasu OKAMOTOTakeyuki KONDO
    • C12P7/56
    • C12P7/56
    • A manufacturing process of purified lactic acid includes a fermentation process where a pH adjusting agent containing calcium and a microorganism are added to a sugar-containing solution to produce lactic acid in the form of calcium lactate, and a purification process where sulfuric acid is added to a solution containing calcium lactate to separate calcium ions in the form of calcium sulfate. Prior to the step of adding sulfuric acid, a reverse osmosis membrane concentration step removes water; a crystallization step crystallizes and removes calcium lactate; and a reverse osmosis membrane concentration step where the solution from which calcium lactate has been removed is heated and allowed to pass through the reverse osmosis membrane removes water, the crystallization step and the subsequent reverse osmosis membrane concentration step being repeated one or more times.
    • 精制乳酸的制造方法包括发酵方法,其中将含有钙和微生物的pH调节剂加入到含糖溶液中以产生乳酸钙形式的乳酸,以及向其中加入硫酸的纯化方法 一种含有乳酸钙分离硫酸钙形式的钙离子的溶液。 在加入硫酸的步骤之前,反渗透膜浓缩步骤除去水; 结晶步骤结晶并除去乳酸钙; 和反渗透膜浓缩步骤,其中已经除去乳酸钙的溶液被加热并允许通过反渗透膜去除水,结晶步骤和随后的反渗透膜浓缩步骤重复一次或多次。
    • 3. 发明申请
    • EQUIPMENT AND METHOD FOR PRODUCING POLYHYDROXYCARBOXYLIC ACID
    • 用于生产聚羟基羧酸的设备和方法
    • US20100076165A1
    • 2010-03-25
    • US12544477
    • 2009-08-20
    • Masayuki KAMIKAWAToshiaki MatsuoNaruyasu OkamotoKenichiro OkaTakeyuki Kondo
    • Masayuki KAMIKAWAToshiaki MatsuoNaruyasu OkamotoKenichiro OkaTakeyuki Kondo
    • C08G63/08C08G85/00B01J19/00
    • C08G63/785B01J4/002B01J19/24B01J2219/00006B01J2219/00777B01J2219/185C08G63/06Y02P20/582
    • This invention provides an equipment and a method for producing polyhydroxycarboxylic acid whereby the yield of a starting material in the process can be improved.An equipment for producing polyhydroxycarboxylic acid, comprising a ring-opening polymerization apparatus, a liquid phase devolatilizing apparatus, and a drying apparatus, wherein: an indirect heat exchanger is connected to a vent gas discharge path of the liquid phase devolatilizing apparatus; the indirect heat exchanger captures a dispersed in-process substance containing hydroxycarboxylic acid cyclic dimers and transfers the substance to the ring-opening polymerization apparatus; a wet condenser and a hot well are connected to a vent gas discharge path of the indirect heat exchanger and that of the drying apparatus, respectively; the wet condenser captures a dispersed in process substance containing the cyclic dimers with the use of a refrigerant containing hydroxycarboxylic acid corresponding to the cyclic dimers and transfers the substance to the hot well; the hot well causes hydrolysis of the cyclic dimers for generation of hydroxycarboxylic acid; the generated hydroxycarboxylic acid is mixed with a refrigerant and the mixture is circulated to the wet condenser; and hydroxycarboxylic acid is highly concentrated via circulation between the wet condenser and the hot well and then discharged, is provided.
    • 本发明提供一种生产聚羟基羧酸的设备和方法,从而可以提高该方法中原料的产率。 一种生产聚羟基羧酸的设备,包括开环聚合设备,液相脱挥发酵设备和干燥设备,其中:间接热交换器连接到液相脱挥发设备的排放气体排放路径; 间接热交换器捕获含有羟基羧酸环状二聚体的分散的在线物质并将物质转移到开环聚合装置中; 湿式冷凝器和热井分别连接到间接热交换器和干燥装置的排放气体排放路径; 湿式冷凝器使用含有对应于环状二聚体的羟基羧酸的制冷剂捕获含有环状二聚体的分散过程物质,并将物质转移到热井中; 热阱引起环状二聚体的水解产生羟基羧酸; 将所生成的羟基羧酸与制冷剂混合,并将混合物循环至湿式冷凝器; 羟基羧酸通过湿式冷凝器和热水槽之间的循环高度浓缩,然后排出。