METHOD FOR PURIFYING TRIETHYLENEDIAMINE
    2.
    发明专利

    公开(公告)号:JP2002363181A

    公开(公告)日:2002-12-18

    申请号:JP2002136221

    申请日:2002-05-10

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To provide a method for purifying triethylenediamine(TEDA) by evaporating TEDA, transferring the gas state TEDA into a liquid solvent and then continuously crystallizing from the solvent, enabling the re-circulation of at least a part of the used solvent into the purification method and also increasing the yield of the TEDA. SOLUTION: This method for purifying the TEDA is provided by extraction- treating a mother liquor obtained after the crystallization of the TEDA by using an extraction agent which is incompatible or slightly compatible with the solvent of the mother liquor and in which the TEDA is easily dissolvable, and returning the mother liquor poor in the TEDA obtained after the extraction and/or the extraction agent rich in the TEDA and used for the extraction to the purification method.

    METHOD FOR PRODUCING PURE TRIETHYLENEDIAMINE SOLUTION

    公开(公告)号:JP2002241380A

    公开(公告)日:2002-08-28

    申请号:JP2002000691

    申请日:2002-01-07

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To provide an efficient and economical method for production by which pure tetraethylenediamine(TEDA) and its solution are improved in order to obtain the TEDA and TEDA solution of improved quality in relation to color, color stability, odor and purity. SOLUTION: This method for producing the solution of the triethylenediamine(TEDA) comprises evaporating the TEDA from a mixture containing a solvent or a diluent wherein the solvent or diluent has 170-250 deg.C boiling point under atmospheric pressure (=1.01325 bars) and passing the TEDA in the form of vapor through a liquid solvent.

    METHOD FOR PRODUCING ASTAXANTHIN AND CANTHAXANTHIN INTERMEDIATE PRODUCTS
    4.
    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。

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