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49 条记录 (耗时 0.036 秒)

    Process for the production of isopropenyl methyl ether
    27.
    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。

    Method for Modification of a Methane-Containing Gas Stream
    28.
    发明申请
    Method for Modification of a Methane-Containing Gas Stream 有权
    含甲烷气流改性方法

    公开(公告)号：US20120318661A1

    公开(公告)日：2012-12-20

    申请号：US13526482

    申请日：2012-06-18

    申请人： Georg Markowz ,  Jürgen Erwin Lang ,  Rüdiger Schütte

    发明人： Georg Markowz ,  Jürgen Erwin Lang ,  Rüdiger Schütte

    IPC分类号： B01J19/08

    CPC分类号： C10L3/10 ,  C01B3/24 ,  C01B2203/0266 ,  C01B2203/04 ,  C01B2203/0861 ,  C01B2203/1241 ,  C10G15/12 ,  Y02P20/133

    摘要： A method for modification of a methane-containing gas stream, comprising the steps of: i) withdrawal of at least one substream from a methane-containing gas stream; ii) treatment of the substream with an electrically generated plasma, generating a modified gas composition which comprises a lower fraction of methane than the methane-containing gas stream used and iii) return of modified gas composition into the methane-containing gas stream. This method makes possible the storage of excess power in a natural gas line grid.

    摘要翻译： 一种用于改变含甲烷气流的方法，包括以下步骤：i）从含甲烷的气流中取出至少一个子流; ii）用电产生的等离子体处理子流，产生改性气体组合物，其包含甲烷的比例低于使用的含甲烷气流，并且iii）将改性气体组合物返回到含甲烷气流中。 这种方法可以在天然气线路网格中存储多余的电力。