METHOD FOR PRODUCING ASTAXANTHIN AND CANTHAXANTHIN INTERMEDIATE PRODUCTS
    2.
    发明申请
    METHOD FOR PRODUCING ASTAXANTHIN AND CANTHAXANTHIN INTERMEDIATE PRODUCTS 审中-公开
    工艺用于生产和虾青素,角黄素前体

    公开(公告)号:WO2005056507A3

    公开(公告)日:2006-12-21

    申请号:PCT/EP2004014119

    申请日:2004-12-10

    CPC classification number: C07C403/08 C07C2601/16 Y02P20/55

    Abstract: The invention relates to a method for producing cyclohexenone derivatives of general formula (I), wherein R 1 represents hydrogen or OH; R 2 represents (Ia), comprising the following steps: (a) hydrolyzing a cyclohexenol compound of formula (II), wherein R 3 represents hydrogen and R 4 represents C 1 -C 6 -alkoxy or R 3 and R 4 represent vicinal hydroxy groups, which carry a common acetal protective group or a ketone protective group, R 5 represents (IIa), and R 6 represents a protected hydroxy group, in the absence of an organic solvent and in the presence of an acid catalyst; and; (b) extracting the reaction mixture by using a polar extracting agent.

    Abstract translation: 本发明涉及一种用于(I),其中R 1 是氢或OH通式环己烯酮衍生物的制备; [R 2 表示(Ia)中,其包括以下步骤:(a)式的Cyclohexenolverbindung水解(II)其中R 3 是氢并且R 4 < 6 为C 1 -C >烷氧基,或R 3 和R 4 连位羟基的 都携带一个共同的缩醛或缩酮保护基团,R 5 是(IIa)中,R 6 是被保护的羟基,在酸中不存在有机溶剂的存在 催化剂; 和(b)用与极性萃取反应混合物。

    3.
    发明专利
    未知

    公开(公告)号:BRPI0507197A

    公开(公告)日:2007-06-26

    申请号:BRPI0507197

    申请日:2005-01-27

    Applicant: BASF AG

    Abstract: A process is described for preparing 3-pentenenitrile, characterized by the following process steps: (a) isomerizing a reactant stream which comprises 2-methyl-3-butenenitrile over at least one dissolved or dispersed isomerization catalyst to give a stream 1 which comprises the at least one isomerization catalyst, 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile, (b) distilling stream 1 to obtain a stream 2 as the top product which comprises 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile, and a stream 3 as the bottom product which comprises the at least one isomerization catalyst, (c) distilling stream 2 to obtain a stream 4 as the top product which, compared to stream 2, is enriched in (Z)-2-methyl-2-butenenitrile, based on the sum of all pentenenitriles in stream 2, and a stream 5 as the bottom product which, compared to stream 2, is enriched in 3-pentenenitrile and 2-methyl-3-butenenitrile, based on the sum of all pentenenitriles in stream 2, (d) distilling stream 5 to obtain a stream 6 as the bottom product which comprises 3-pentenenitrile and a stream 7 as the top product which comprises 2-methyl-3-butenenitrile.

    7.
    发明专利
    未知

    公开(公告)号:DE50301577D1

    公开(公告)日:2005-12-08

    申请号:DE50301577

    申请日:2003-07-07

    Applicant: BASF AG

    Abstract: The invention relates to a method for the separation of ascorbic acid from a mixture containing ascorbic acid and 2-keto-L-gulonic acid in a polar, preferably aqueous solvent, by means of liquid/liquid extraction using an amide. The method preferably also comprises steps for the back-extraction of the ascorbic acid, recycling of the extraction solvent and/or the back extraction solvent and for isolation of the ascorbic acid from the back extraction solvent. The invention further relates to a method for the production of ascorbic acid from KGA and isolation of the ascorbic acid so produced.

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