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    METHOD FOR THE PRODUCTION OF 2-KETO-L-GULONIC ACID-C4-C10 ALKYL ESTERS
    1.
    发明申请
    METHOD FOR THE PRODUCTION OF 2-KETO-L-GULONIC ACID-C4-C10 ALKYL ESTERS 审中-公开
    用于生产2-酮基-L-古洛糖-C4-C10烷基酯

    公开(公告)号：WO2004043880A3

    公开(公告)日：2004-07-29

    申请号：PCT/EP0312458

    申请日：2003-11-07

    Applicant: BASF AG ,  DOMSCHKE THOMAS ,  MERGER MARTIN ,  GROSSMANN GEORG ,  FAUST TILLMANN

    Inventor： DOMSCHKE THOMAS ,  MERGER MARTIN ,  GROSSMANN GEORG ,  FAUST TILLMANN

    IPC: C07C20060101 ,  C07H7/027

    CPC classification number: C07H7/027 ,  Y02P20/127

    Abstract: The invention relates to a method for producing 2-keto-L-gulonic acid-C4-C10 alkyl ester by esterifying 2-keto-L-gulonic acid (KGS) with an unsaturated, branched or unbranched C4-C10 alcohol. The inventive method is characterized by the fact that an aqueous KGS solution is reacted with a C4-C10 alcohol up to an esterification degree of 20 to 70 percent in a pre-esterification process carried out under acidic catalysis conditions; and the obtained product is dehydrogenated with an unsaturated, branched or unbranched C4-C10 alcohol in a continuous rectification device, whereby the esterification reaction continues, n-butanol preferably being used as the alkyl alcohol. In a preferred embodiment, the aqueous KGS solution is concentrated up to or beyond the limit of solubility prior to the esterification process, preferably by catalyzing a homogeneous or heterogeneous catalyst, especially sulfonic acid, at temperatures of 50 to 120 °C. In another embodiment, the produced KGS ester is reacted in one or several additional steps so as to obtain L-ascorbic acid.

    Abstract translation: 本发明涉及一种用于通过酯化2-酮基-L-古洛糖酸（KGA）与不饱和，支链或无支链的C 4 -C 10醇，其特征在于，生产2-酮基-L-古洛糖的C 4 -C 10烷基酯 即在初步反应酯化，水性KGA溶液用在酸催化下高达一定程度的20％至70％的酯化的C4-C10醇; 并且该产品是在与不饱和的，支链或无支链C4-C10醇的连续精馏装置脱水的进行，由此进行酯化反应。 优选地，烷基醇是正丁醇。 在一个优选的实施方案中，水性溶液KGA高达溶解度或超出之前酯化浓缩，优选在均相或非均相催化剂的催化，特别是硫酸，并在温度为50℃至120℃。 在所产生的KGS-酯为L-抗坏血酸的另一实施例中的一个或几个另外的步骤进行反应。

    METHOD FOR EXTRACTING IMPURITIES USING IONIC LIQUIDS
    2.
    发明申请
    METHOD FOR EXTRACTING IMPURITIES USING IONIC LIQUIDS 审中-公开
    用离子液体萃取污染的方法

    公开(公告)号：WO2005019137A8

    公开(公告)日：2005-06-16

    申请号：PCT/EP2004007254

    申请日：2004-07-03

    Applicant: BASF AG ,  MAASE MATTHIAS ,  BUDICH MANUEL ,  GROSSMANN GEORG ,  SZARVAS LASZLO

    Inventor： MAASE MATTHIAS ,  BUDICH MANUEL ,  GROSSMANN GEORG ,  SZARVAS LASZLO

    IPC: C07B63/00

    CPC classification number: C07B63/00 ,  Y02P20/542

    Abstract: The invention relates to a method for the extraction of phenols, alcohols, amines, phosphines, hydroxylamines, hydrazines, oximes, imines, water, carboxylic acids, amino acids, hydroxamic acids, sulphinic acids, sulphonic acids, peroxycarboxylic acids, phosphonous acids, phosphinous acids, phosphonic acids, phosphinic acids or phosphoric acids from aprotic solvents with the aid of ionic liquids of the formula [K]n +[A] , where n, [K] and A are defined as cited in the description.

    Abstract translation: 本发明涉及一种用于萃取除去酚的方法，醇，胺，Phoshinen，羟胺，肼，肟，亚胺，水，羧酸，氨基酸，异羟肟酸，亚磺酸，磺酸，过氧酸，亚膦酸，三价膦酸，膦酸，次膦酸或磷酸 apotischen溶剂由下式的离子液体的手段[K] N + [A] - ，其中n，[K]被定义<+>和如说明书中列出的A 。

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