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    • 28. 发明授权
    • Method for preparing lactide using an ionic solvent
    • 使用离子溶剂制备丙交酯的方法
    • US09102647B2
    • 2015-08-11
    • US14061088
    • 2013-10-23
    • Hyundai Motor Company
    • Si Hwan KimChae Hwan HongDo Suck HanJi Yeon Seo
    • C07D319/00C07D319/12
    • C07D319/12
    • Disclosed is a method for preparing lactide by using a solvent. According to the method, since an ionic liquid is used as a solvent in a second step in the course of preparing lactide, it is possible to secure mobility of the resulting reactant, and decrease a reaction temperature. In addition, the ionic liquid absorbs moisture generated during the reaction, and thus prevents degradation of lactide which is susceptible to moisture. Furthermore, to the present method allows for the preparation of lactide successively through the continuous supply of lactic acid oligomers. Because the use of an ionic liquid minimizes the contamination of a reactive group with by-products, the use of a solvent for reactor washing is unnecessary. Further, owing to a high boiling point of the ionic liquid, the ionic liquid can be easily harvested and recycled.
    • 公开了通过使用溶剂制备丙交酯的方法。 根据该方法,由于在制备丙交酯的过程中在第二步中使用离子液体作为溶剂,因此可以确保所得反应物的迁移率,并降低反应温度。 此外,离子液体吸收在反应期间产生的水分,从而防止易受潮湿影响的丙交酯的降解。 此外,本方法允许通过连续供应乳酸低聚物连续制备丙交酯。 因为使用离子液体使反应性基团与副产物的污染最小化,所以不需要使用用于反应器洗涤的溶剂。 此外,由于离子液体的高沸点,离子液体可以容易地收获和再循环。
    • 29. 发明授权
    • Method and apparatus for producing lactic acid
    • 生产乳酸的方法和装置
    • US08673600B2
    • 2014-03-18
    • US13717947
    • 2012-12-18
    • Hyundai Motor Company
    • Si Hwan KimChae Hwan HongJiyoun SeoDo Suck Han
    • C12P7/56C12P7/40C12P7/00
    • C12M27/18C12M29/18C12M47/10
    • Disclosed is an apparatus and a method for producing lactic acid, wherein only lactic acid is selectively absorbed and separated from fermentation liquor using a lactic acid absorption resin and wherein a neutralizing agent is not used. The present invention does not include a neutralizing process and a process of converting lactate to lactic acid. The method comprises: adding and mixing a culture medium, microorganism and sugar in a fermenter; passing a fermentation liquor through a microorganism filtration unit to remove microorganisms; and selectively absorbing and separating lactic acid from filtered liquid using a lactic acid absorption resin. The apparatus includes a fermenter for lactic acid fermentation; a filtration unit for removing a microorganisms from the fermentation liquor; and a lactic acid absorption resin for selectively absorbing lactic acid from the filtered liquid.
    • 本发明公开了一种生产乳酸的装置和方法,其中只使用乳酸吸收树脂从发酵液中选择性地吸收和分离乳酸,并且其中不使用中和剂。 本发明不包括中和方法和将乳酸转化成乳酸的方法。 该方法包括:在发酵罐中加入和混合培养基,微生物和糖; 将发酵液通过微生物过滤单元以除去微生物; 并使用乳酸吸收树脂选择性地从过滤液中吸收和分离乳酸。 该装置包括用于乳酸发酵的发酵罐; 用于从发酵液中除去微生物的过滤单元; 以及用于从过滤液中选择性吸收乳酸的乳酸吸收树脂。
    • 30. 发明申请
    • METHOD AND APPARATUS FOR PRODUCING LACTIC ACID
    • 用于生产乳酸的方法和装置
    • US20130266996A1
    • 2013-10-10
    • US13717947
    • 2012-12-18
    • HYUNDAI MOTOR COMPANY
    • Si Hwan KimChae Hwan HongJiyoun SeoDo Suck Han
    • C12M1/00
    • C12M27/18C12M29/18C12M47/10
    • The present invention provides an apparatus and a method for producing lactic acid, wherein only lactic acid is selectively absorbed and separated from fermentation liquor using a lactic acid absorption resin and wherein a neutralizing agent is not used. The present invention does not include a neutralizing process and a process of converting lactate to lactic acid. The method of the present invention comprises the steps of: adding and mixing a culture medium, microorganism and sugar in a fermenter; passing a fermentation liquor through a microorganism filtration unit to remove microorganism through a cross-flow filtration; and selectively absorbing and separating lactic acid from filtered liquid using a lactic acid absorption resin. Accordingly, the separation and purification process of lactic acid from a fermentation liquor for polymerization is simplified. The manufacturing cost is thus reduced. The apparatus of the invention includes a fermenter for lactic acid fermentation; a filtration unit for removing a microorganism present in a fermentation liquor; and a lactic acid absorption resin for selectively absorbing lactic acid from a filtered liquid.
    • 本发明提供一种生产乳酸的装置和方法,其中只使用乳酸吸收树脂从发酵液中选择性地吸收和分离乳酸,并且其中不使用中和剂。 本发明不包括中和方法和将乳酸转化成乳酸的方法。 本发明的方法包括以下步骤:在发酵罐中加入和混合培养基,微生物和糖; 将发酵液通过微生物过滤单元以通过交叉流过滤除去微生物; 并使用乳酸吸收树脂选择性地从过滤液中吸收和分离乳酸。 因此,简化了用于聚合的发酵液中的乳酸的分离和纯化过程。 因此制造成本降低。 本发明的装置包括用于乳酸发酵的发酵罐; 用于除去发酵液中存在的微生物的过滤单元; 以及用于从过滤液中选择性吸收乳酸的乳酸吸收树脂。