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31 条记录 (耗时 0.015 秒)

    Preparation of vitamin E
    2.
    发明授权
    Preparation of vitamin E 失效
    维生素E的制备

    公开(公告)号：US5468883A

    公开(公告)日：1995-11-21

    申请号：US302743

    申请日：1994-09-09

    申请人： Paul Grafen ,  Hans Kiefer ,  Hagen Jaedicke

    发明人： Paul Grafen ,  Hans Kiefer ,  Hagen Jaedicke

    IPC分类号： B01J31/04 ,  C07B61/00 ,  C07D311/72

    CPC分类号： C07D311/72

    摘要： A process for preparing dl-.alpha.-tocopherol or dl-.alpha.-tocopheryl acetate by acid-catalyzed reaction of 2,3,5-trimethylhydroquinone (TMH) with phytol or isophytol in a solvent at elevated temperature, with or without subsequent esterification of the resulting tocopherol with acetic anhydride, entails the reaction being carried out in the presence of a mixture of ortho-boric acid and certain aliphatic di- or tricarboxylic acids, preferably in the presence of a mixture of ortho-boric acid and oxalic acid.

    摘要翻译： PCT No.PCT / EP93 / 00498 Sec。 371日期1994年9月9日 102（e）1994年9月9日PCT 1993年3月5日PCT公布。 第WO93 / 19057号公报 日本1993年9月30日。一种通过2,3,5-三甲基氢醌（TMH）与植物醇或异植醇在溶剂中在升高的温度下酸催化反应制备dl-α-生育酚或dl-α-生育酚乙酸酯的方法， 随着或不用所得到的生育酚与乙酸酐的酯化反应，需要在邻 - 硼酸和某些脂肪族二 - 或三羧酸的混合物存在下进行反应，优选在邻 - 硼酸 酸和草酸。

    Preparation of formic acid by thermal cleavage of quaternary ammonium formates
    4.
    发明授权
    Preparation of formic acid by thermal cleavage of quaternary ammonium formates 失效
    通过季铵化合物的热裂解制备甲酸

    公开(公告)号：US5294740A

    公开(公告)日：1994-03-15

    申请号：US41048

    申请日：1993-03-31

    申请人： Hans Kiefer ,  Leopold Hupfer ,  Ferdinand Lippert

    发明人： Hans Kiefer ,  Leopold Hupfer ,  Ferdinand Lippert

    IPC分类号： C07C51/02 ,  C07C51/09 ,  C07C51/44

    CPC分类号： C07C51/02

    摘要： A process for preparing formic acid by thermal cleavage of quaternary ammonium formates of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are C.sub.1 - to C.sub.14 -alkyl, C.sub.3 - to C.sub.8 -cycloalkyl, aryl or C.sub.7 - to C.sub.16 -aralkyl, or together are 1,4- or 1,5-alkylene which is unsubstituted or substituted one to four times by C.sub.1 -to C.sub.4 -alkyl, with the proviso that the sum of the carbon atoms of R.sup.1, R.sup.2 and R.sup.3 in the quaternary ammonium formates I is 7 to 40,comprises carrying out the cleavage in the presence of secondary formamides of the general formula II ##STR2## where R.sup.4 and R.sup.5 are C.sub.2 - to C.sub.10 -alkyl, C.sub.3 - to C.sub.8 -cycloalkyl, aryl or C.sub.7 - to C.sub.16 -aralkyl, or together are 1,4- or 1,5-alkylene which is unsubstituted or substituted one to four times by C.sub.1 - to C.sub.4 -alkyl,which formamides boil 30.degree. to 150.degree. C. lower than the tertiary amine of the general formula III ##STR3## where R.sup.1, R.sup.2 and R.sup.3 have the abovementioned meanings, contained in the formate I.

    摘要翻译： 通式I（*化学结构*）（I）的季铵盐的热裂解制备甲酸的方法，其中R 1，R 2和R 3是C 1〜C 14烷基，C 3〜C 8环烷基，芳基或 C7-至C16-芳烷基，或一起为未取代或被C1至C4-烷基取代1-4次的1,4-或1,5-亚烷基，条件是R1， 季铵盐I中的R 2和R 3为7至40，包括在通式II（*化学结构*）（II）的二级甲酰胺存在下进行裂解，其中R 4和R 5为C 2至C 10 - 烷基 ，C 3 -C 8 - 环烷基，芳基或C 7 - 至C 16 - 芳烷基，或者一起是未被取代或被C 1〜C 4 - 烷基取代1〜4次的1,4-或1,5-亚烷基， 比通式III的叔胺（*化学结构*）（III）低30〜150℃，其中R1，R2和R3具有上述含义，含有i 在甲板上

    Isolation of a carboxylic acid from an aqueous solution thereof
    5.
    发明授权
    Isolation of a carboxylic acid from an aqueous solution thereof 失效
    从其水溶液中分离羧酸

    公开(公告)号：US5189216A

    公开(公告)日：1993-02-23

    申请号：US730768

    申请日：1991-07-16

    申请人： Hans Kiefer ,  Werner Reutemann

    发明人： Hans Kiefer ,  Werner Reutemann

    IPC分类号： C07C51/50 ,  C07C51/48 ,  C07C53/02 ,  C07C53/08 ,  C07C53/122 ,  C07C57/07 ,  C07C231/02 ,  C07C233/04 ,  C07C233/05 ,  C07C233/06 ,  C07C233/07

    CPC分类号： C07C51/48

    摘要： A process for the isolation of a carboxylic acid of the general formula (I)R.sup.1 --COOH (I),in which R.sup.1 denotes hydrogen, methyl, ethyl, or vinyl, from a dilute aqueous solution thereof by extraction with a secondary amide of the general formula (II) ##STR1## in which R.sup.1 has the meanings stated, and R.sup.2 and R.sup.3 are independently of each other C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, C.sub.4 -C.sub.20 -cycloalkylalkyl, aryl, C.sub.7 -C.sub.20 -aralkyl, or R.sup.2 and R.sup.3 together form a 1,4- or 1,5-alkylene group which may be mono- to penta-substituted by C.sub.1 -C.sub.4 -alkyl, wherein the losses of secondary amide (II) are compensated by the addition of the corresponding amine of the general formula (III) ##STR2## in which R.sup.2 and R.sup.3 have the meanings stated above.

    摘要翻译： 通过用二级酰胺萃取从其稀水溶液中分离通式（I）的羧酸R1-COOH（I）的方法，其中R 1表示氢，甲基，乙基或乙烯基 通式（II）其中R 1具有所述的含义，并且R 2和R 3彼此独立地为C 1 -C 8 - 烷基，C 3 -C 8 - 环烷基，C 4 -C 20环烷基烷基，芳基， C 20 - 芳烷基或R 2和R 3一起形成可被C 1 -C 4烷基单 - 五取代的1,4-亚烷基或1,5-亚烷基，其中仲酰胺（II）的损失由 加入其中R2和R3具有上述含义的通式（III）的相应胺。

    Preparation of riboflavin 5'-phosphate (FMN) and its sodium salt in a lactone
    7.
    发明授权
    Preparation of riboflavin 5'-phosphate (FMN) and its sodium salt in a lactone 失效
    五磷酸五磷酸（FMN）及其盐中的盐酸盐的制备

    公开(公告)号：US5095115A

    公开(公告)日：1992-03-10

    申请号：US571230

    申请日：1990-08-23

    申请人： Johannes Grimmer ,  Hans Kiefer

    发明人： Johannes Grimmer ,  Hans Kiefer

    IPC分类号： A61K31/675 ,  A61P3/02 ,  C07F9/6524 ,  C07F9/6561 ,  C07F9/6574

    CPC分类号： C07F9/65618 ,  C07F9/65742

    摘要： An improved process for preparing riboflavin 5'-phosphate (FMN) or its monosodium salt by reacting riboflavin with excess phosphorus oxychloride in a solvent, hydrolyzing of the resulting reaction mixture and, if desired, partially neutralizing with aqueous sodium hydroxide solution, comprises reacting the riboflavin with from 1.2 to 3 moles of phosphorus oxychloride per mole of riboflavin in a suitable lactone, especially .gamma.-butyrolactone, as solvent. The process is particularly advantageous when the reaction mixture is hydrolyzed at from 80.degree. to 90.degree. C. continuously or batchwise.

    摘要翻译： 通过使核黄素与过量的三氯氧化磷在溶剂中反应制备核黄素5'-磷酸（FMN）或其单钠盐的改进方法，水解所得反应混合物，如果需要，用氢氧化钠水溶液部分中和， 在适当的内酯，特别是γ-丁内酯中，每摩尔核黄素使用1.2至3摩尔磷酰氯的核黄素作为溶剂。 当反应混合物连续或间歇地在80℃至90℃下水解时，该方法特别有利。

    Passive dosimeter
    9.
    发明授权
    Passive dosimeter 失效
    被动剂量计

    公开(公告)号：US4704537A

    公开(公告)日：1987-11-03

    申请号：US698792

    申请日：1985-02-06

    申请人： Manfred Urban ,  Hans Kiefer

    发明人： Manfred Urban ,  Hans Kiefer

    IPC分类号： G01T5/10 ,  G01V5/00

    CPC分类号： G01T5/10 ,  Y10S250/02

    摘要： In a passive dosimeter including a diffusion chamber having an interior space, and an alpha particle detector located within the chamber for producing an indication of the concentration of radon and thoron gas and decay products and the relative percentages of radon and thoron individually, the diffusion chamber is constructed so that the interior space is open to the outside, the size of the detector and of the interior space are selected for causing the differences in path length of alpha particles in the interior space to permit the emission energy to be determined independently of the location of decay events, and the surface of the chamber bordering the interior space is electrically conductive.

    摘要翻译： 在包括具有内部空间的扩散室的无源剂量计和位于室内的α粒子检测器中，用于分别产生氡气和钍气的浓度和衰变产物的浓度以及氡和钍的相对百分比，扩散室 被构造成使得内部空间对外部开放，选择检测器和内部空间的尺寸以使内部空间中的α粒子的路径长度的差异允许独立于 衰变事件的位置以及与室内空间接近的室的表面是导电的。