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    Process for the production of isopropenyl methyl ether
    1.
    发明授权
    Process for the production of isopropenyl methyl ether 失效
    异丙烯基甲基醚的制备方法

    公开(公告)号：US06566559B2

    公开(公告)日：2003-05-20

    申请号：US09871000

    申请日：2001-06-01

    申请人： Steffen Krill ,  Stephan Kretz ,  Volker Häfner ,  Georg Markowz

    发明人： Steffen Krill ,  Stephan Kretz ,  Volker Häfner ,  Georg Markowz

    IPC分类号： C07C4128

    CPC分类号： C07C41/38 ,  C07C41/28 ,  C07C43/15

    摘要： Process for the production of unsaturated ethers, in particular isopropenyl methyl ether (IPM), by pyrolysis of a ketal-containing or acetal-containing mixture, in particular dimethoxypropane (DMP), in the liquid phase in the presence of an organic carboxylic acid, according to the following reaction scheme: wherein R1=H or alkyl with 1-8 C atoms; R2=H, CH3—, C2H5—, or Cl—; R3=alkyl with 1-8 C atoms; R4=H, CH3—, C2H5—, or C3H7—, and R1 and R4 may be joined to form a 5-, 6-, or 7-membered ring. DMP is produced by the process from acetone and methanol by reaction in an acidic heterogeneous ion exchanger, the product being isolated by extraction with aqueous alkaline solution. In particular the process involves combining the IPM reaction product with the DMP reaction product, which permits the execution of a stable recycling process in which the methanol-containing streams of the IPM and DMP stages can be simultaneously extracted. The product may be isolated by the process by simple distillation of IPM from a mixture containing IPM, DMP and acetone.

    摘要翻译： 通过在有机羧酸的存在下在液相中热解含缩酮或含缩醛的混合物，特别是二甲氧基丙烷（DMP），生产不饱和醚，特别是异丙烯基甲基醚（IPM）的方法， 根据以下反应方案：其中R1 = H或具有1-8个C原子的烷基; R2 = H，CH3-，C2H5-或Cl-; R3 =具有1-8个C原子的烷基; R 4 = H，CH 3 - ，C 2 H 5 - 或C 3 H 7 - ，并且R 1和R 4可以连接形成5-，6-或7-元环。 通过在酸性异质离子交换剂中反应，通过丙酮和甲醇的方法制备DMP，产物通过碱性水溶液萃取分离。 特别地，该方法包括将IPM反应产物与DMP反应产物组合，这允许执行稳定的再循环过程，其中可以同时萃取IPM和DMP阶段的含甲醇流。 通过从含有IPM，DMP和丙酮的混合物中简单蒸馏IPM可以通过该方法分离产物。

    Process for the production of 2,3,5-trimethylhydroquinone diesters
    2.
    发明授权
    Process for the production of 2,3,5-trimethylhydroquinone diesters 失效
    制备2,3,5-三甲基氢醌二酯的方法

    公开(公告)号：US06316661B1

    公开(公告)日：2001-11-13

    申请号：US09493065

    申请日：2000-01-28

    申请人： Steffen Krill ,  Horst Weigel ,  Klaus Huthmacher ,  Nongyuan Shi ,  Georg Markowz ,  Volker Hafner

    发明人： Steffen Krill ,  Horst Weigel ,  Klaus Huthmacher ,  Nongyuan Shi ,  Georg Markowz ,  Volker Hafner

    IPC分类号： C07C6900

    CPC分类号： C07C67/00 ,  Y02P20/582 ,  C07C69/017 ,  C07C69/16 ,  C07C69/28

    摘要： A process for the production of 2,3,5-trimethylhydroquinone diesters by aromatization of 2,6,6-trimethyl-2-cyclohexene-1,4-dione (4-oxoisophorone, ketoisophorone, KIP) with an acylating agent and an acidic soluble or insoluble catalyst, which process may be operated alternatively continuously or discontinuously. The process includes the following steps: a) a carboxylic anhydride having a C1 to C4 alkyl residue is used as the acylating agent, b) after the reaction, a proportion of the resultant carboxylic acid is optionally removed by distillation, c) the reaction solution is cooled, d) the product which has crystallized out is separated and washed, and e) the filtrate is returned to step a).

    摘要翻译： 通过2,6,6-三甲基-2-环己烯-1,4-二酮（4-氧异佛尔酮，酮异佛尔酮，KIP）与酰化剂和酸性化合物的芳构化生产2,3,5-三甲基氢醌二酯的方法 可溶或不溶的催化剂，该方法可以交替连续或不连续地操作。 该方法包括以下步骤：a）具有C1至C4烷基残基的羧酸酐用作酰化剂，b）反应后，任选地通过蒸馏除去所得羧酸的一部分，c）反应溶液 被冷却，d）结晶出来的产物被分离和洗涤，e）将滤液返回到步骤a）。

    Process for the preparation of 6-methylheptanone
    3.
    发明授权
    Process for the preparation of 6-methylheptanone 失效
    6-甲基庚酮的制备方法

    公开(公告)号：US06605746B2

    公开(公告)日：2003-08-12

    申请号：US10096959

    申请日：2002-03-14

    申请人： Steffen Krill ,  Stephan Kretz ,  Achim Schneider

    发明人： Steffen Krill ,  Stephan Kretz ,  Achim Schneider

    IPC分类号： C07C4572

    CPC分类号： C07C49/04 ,  C07C45/73

    摘要： A process for the preparation of methylheptanone and corresponding homologous methyl ketones involves the cross-aldolization of acetone with the corresponding aldehyde. The polar catalyst phase is introduced with acetone and an organic auxiliary solvent phase to form a two phase mixture in the presence of hydrogen. The corresponding aldehyde is then added at temperatures between 40° C. and 200° C. The process can be run in a continuous manner with the polar catalyst phase being recyled after regeneration. The use of the non-polar auxiliary solvent(s) increase yield and selectivity.

    摘要翻译： 制备甲基庚酮和相应的同系甲基酮的方法涉及丙酮与相应的醛的交叉醛化。 将极性催化剂相引入丙酮和有机辅助溶剂相以在氢的存在下形成两相混合物。 然后在40℃和200℃之间的温度下加入相应的醛。该方法可以以连续方式进行，极性催化剂相在再生后再生。 使用非极性辅助溶剂提高了产率和选择性。

    Process to produce &agr;-tocopherol-acetate
    4.
    发明授权
    Process to produce &agr;-tocopherol-acetate 失效
    生产α-生育酚醋酸酯的方法

    公开(公告)号：US06239294B1

    公开(公告)日：2001-05-29

    申请号：US09571314

    申请日：2000-05-15

    申请人： Steffen Krill ,  Stephan Kretz ,  Klaus Huthmacher

    发明人： Steffen Krill ,  Stephan Kretz ,  Klaus Huthmacher

    IPC分类号： C07D31104

    CPC分类号： C07D311/04 ,  Y02P20/584

    摘要： Process for the production of &agr;-tocopherol acetate in a recycling process by condensation of trimethylhydroquinone diesters and isophytol in the presence of a catalyst system consisting of a zinc halide and of an aqueous protonic acid and optionally of an elemental metal in a polar solvent/water mixture which is extractable or miscible with water and subsequent recycling of the catalyst system.

    摘要翻译： 在循环过程中通过三甲基氢醌二酯和异构醇在由卤化锌和质子酸水溶液和任选的元素金属在极性溶剂/水中组成的催化剂体系存在下缩合制备α-生育酚乙酸酯的方法 混合物，其可萃取或与水混溶并随后再循环催化剂体系。

    Process for the production of 6-methylheptanone
    8.
    发明授权
    Process for the production of 6-methylheptanone 失效

    公开(公告)号：US06583323B2

    公开(公告)日：2003-06-24

    申请号：US10092478

    申请日：2002-03-08

    申请人： Steffen Krill

    发明人： Steffen Krill

    IPC分类号： C07C4572

    CPC分类号： C07C49/04 ,  C07C45/73 ,  Y02P20/582

    摘要： Methylheptanone and corresponding homologous methylketones, in particular phytone and tetrahydrogeranyl acetone, are produced by aldol condensation of isovaleraldehyde or prenal or the corresponding aldehydes with acetone in the presence of a catalyst phase, which contains an aldolizing catalyst and a heterogeneous hydrogenating catalyst.