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16 条记录 (耗时 0.017 秒)

    Method for the preparation of rhamnose monohydrate from rhamnolipids
    6.
    发明授权
    Method for the preparation of rhamnose monohydrate from rhamnolipids 失效
    从鼠李糖脂制备鼠李糖一水合物的方法

    公开(公告)号：US5550227A

    公开(公告)日：1996-08-27

    申请号：US250104

    申请日：1994-05-26

    申请人： Johann Mixich ,  Knut M. Rapp ,  Manfred Vogel

    发明人： Johann Mixich ,  Knut M. Rapp ,  Manfred Vogel

    IPC分类号： C07H3/02 ,  C07H3/08 ,  C07H1/00 ,  C07H1/06 ,  C07H1/08 ,  C13K13/00

    CPC分类号： C07H3/08 ,  C07H3/02

    摘要： The invention relates to a method for the preparation of rhamnose from rhamnolipids, for which an acidic emulsion of the rhamnolipid is hydrolyzed at 100.degree. to 200.degree. and subsequently cooled, the aqueous phase of the resulting hydrolysate is separated from the lipid phase, its pH is raised by the addition of a basic compound, any precipitate formed is removed, the remaining solution is concentrated and either processed further directly or chromatographed on ion exchange resin, rhamnose-containing fractions being obtained as eluate, which are processed further as such or worked up into crystalline rhamnose monohydrate.

    摘要翻译： 本发明涉及一种从鼠李糖脂制备鼠李糖的方法，将鼠李糖脂的酸性乳液在100〜200℃下水解，随后冷却，将得到的水解产物的水相与脂质相分离，其pH值 通过加入碱性化合物，除去所形成的沉淀物，将剩余的溶液浓缩并进一步直接处理或在离子交换树脂上进行色谱分离，获得的含鼠李糖的馏分作为洗脱液进一步加工或加工 加入结晶的鼠李糖一水合物。

    Process for preparing 1,6-.beta.-D-anhydroglucopyranose (levoglucosan) in high purity
    7.
    发明授权
    Process for preparing 1,6-.beta.-D-anhydroglucopyranose (levoglucosan) in high purity 失效
    制备高纯度1,6-β-D-脱水葡萄糖吡喃糖（左旋葡聚糖）的方法

    公开(公告)号：US5023330A

    公开(公告)日：1991-06-11

    申请号：US302885

    申请日：1989-01-30

    申请人： Michael Gander ,  Knut M. Rapp ,  Hubert Schiweck

    发明人： Michael Gander ,  Knut M. Rapp ,  Hubert Schiweck

    IPC分类号： C07H3/10 ,  C07H1/08 ,  C07H19/01

    CPC分类号： C07H19/01

    摘要： Process of preparing 1,6-.beta.-D-anhydroglucopyranose (levoglucosan) in high purity is described, where the starting material with a water-content, adjusted to max. 20%, is pyrolyzed, the volatile components are condensed and this distillate is neutralized. After filtration and optional treatment with an adsorbent, the mixture is chromatographically separated over an ion-exchange resin with water as eluent. Levoglucosan containing fractions are concentrated and crystalline levoglucosan is obtained by an evaporation - and/or cooling crystallization from a supersaturated water solution.

    摘要翻译： 描述了制备高纯度1,6-β-D-脱水葡萄糖吡喃糖（左旋葡聚糖）的方法，其中起始物料的含水量调节至最大。 20％，被热解，挥发性成分被冷凝，该馏出物被中和。 过滤并用吸附剂任选处理后，将混合物用离子交换树脂与水作为洗脱液进行色谱分离。 将含有左旋葡聚糖的级分浓缩，通过从过饱和水溶液中蒸发和/或冷却结晶获得结晶左旋葡聚糖。

    Dicyanovinylsubstituted furan derivatives
    9.
    发明授权
    Dicyanovinylsubstituted furan derivatives 失效
    DICYANOVINYLSUTITUTED FURAN DERIVATIVES

    公开(公告)号：US5091538A

    公开(公告)日：1992-02-25

    申请号：US445092

    申请日：1989-12-05

    申请人： Jorg Daub ,  Knut M. Rapp ,  Petra Seitz ,  Rainer Wild ,  Josef Salbeck

    发明人： Jorg Daub ,  Knut M. Rapp ,  Petra Seitz ,  Rainer Wild ,  Josef Salbeck

    IPC分类号： B01J31/02 ,  C07D307/54 ,  C09K9/02 ,  G03C1/73 ,  G11B7/244 ,  H01B1/12

    CPC分类号： B01J31/0235 ,  C07D307/54 ,  C09K9/02 ,  G03C1/73 ,  G11B7/244 ,  H01B1/121

    摘要： The present invention refers to dicyanovinylsubstituted furan derivatives, processes for their production and their application. The new furan derivatives are represented by the general formula ##STR1## wherein x.sup.1 and x.sup.2 are equal or different and stand for H, alkyl, alkenyl, aryl, halogen, NO.sub.2 or CN.In the general formula I, n may be 0 or 1. In case of n=0, A means e.g. --CH.sub.2 OR.sup.1 (with e.g. R.sup.1 .dbd.H, alkyl or aryl).The compounds according to this invention can be used directly or in the form of their cycloadducts in several applications of electro-optical fields, e.g. for the manufacture of optical data recording systems or organic (electron) conducting materials or electron-transfer catalysts.

    摘要翻译： 本发明涉及二氰乙烯基取代的呋喃衍生物，其制备方法及其应用。 新的呋喃衍生物由通式XI表示，其中x1和x2相同或不同，代表H，烷基，烯基，芳基，卤素，NO 2或CN。 在通式I中，n可以是0或1.在n = 0的情况下，A表示例如。 -CH 2 OR 1（例如，R 1 = H，烷基或芳基）。 根据本发明的化合物可以在电光场的几种应用中直接或以其环加成物的形式使用。 用于制造光学数据记录系统或有机（电子）导电材料或电子转移催化剂。

    Process for preparing pure 5-hydroxymethylfurfuraldehyde
    10.
    发明授权
    Process for preparing pure 5-hydroxymethylfurfuraldehyde 失效
    纯5-羟甲基糠醛制备方法

    公开(公告)号：US4740605A

    公开(公告)日：1988-04-26

    申请号：US002340

    申请日：1987-01-12

    申请人： Knut M. Rapp

    发明人： Knut M. Rapp

    IPC分类号： C07D307/46 ,  C07D307/50

    CPC分类号： C07D307/46

    摘要： The present invention refers to a process for preparing 5-hydroxymethylfurfuraldehyde, which is also called HMF. This compound was yet prepared by dehydration of fructose-containing carbohydrates in the presence of various catalysts. Nevertheless, the separation of HMF from starting material, by-products and organic solvents was difficult and disadvantageous, especially by the presence of organic solvents. Surprisingly, it came out, that it is possible, to separate 5-hydroxymethylfurfuraldehyde from reaction mixtures, which are obtained by reactions of saccharides with an acid catalyst, in great purity and good yield with exclusive utilization of water as solvent, by means of ion exchangers, and to crystallize it out from chromatographic fractions.

    摘要翻译： 本发明涉及一种称为HMF的制备5-羟甲基糠醛的方法。 该化合物还是通过在各种催化剂存在下脱水含有果糖的碳水化合物制备的。 然而，HMF与原料，副产物和有机溶剂的分离是困难和不利的，特别是通过存在有机溶剂。 令人惊奇的是，有可能从反应混合物中分离出5-羟甲基糠醛，这些反应混合物是通过糖与酸催化剂的反应得到的，纯度高，产率高，独特地利用水作为溶剂，通过离子 交换剂，并从色谱部分中结晶出来。