Separation of liquid mixtures comprising formaldehyde, trioxane, alcohol and hemiformal
    23.
    发明授权
    Separation of liquid mixtures comprising formaldehyde, trioxane, alcohol and hemiformal 失效
    分离包含甲醛,三恶烷,乙醇和半缩甲醛的液体混合物

    公开(公告)号:US06201136B1

    公开(公告)日:2001-03-13

    申请号:US09436547

    申请日:1999-11-09

    IPC分类号: C07D32306

    CPC分类号: C07D323/06 B01D3/146

    摘要: In a process for separating liquid mixtures comprising formaldehyde, trioxane, alcohol, hemiformal formed from the formaldehyde and the alcohol, usual minor components and up to 5% by weight of water, the liquid mixture is distilled batchwise or continuously at reduced pressure, atmospheric pressure or superatmospheric pressure in suitable apparatuses which are to be connected to one another in an appropriate manner, and the trioxane is produced in very high purity. The other materials of value, formaldehyde and alcohol, present in the mixture can likewise optionally be separated off and recycled or used otherwise, while the minor components are ejected.

    摘要翻译: 在分离由甲醛,三恶烷,醇,由甲醛和醇形成的半缩甲醛,通常的次要成分和最多5重量%的水的液体混合物的分离过程中,液体混合物在减压,大气压下分批或连续蒸馏 或在适当的设备中以适当的方式相互连接的超大气压,并且三恶烷以非常高的纯度制备。 存在于混合物中的价值的其它材料,甲醛和乙醇也同样可以任意地被分离出来并再循环,否则以其他方式使用,而次要组分被喷出。

    Combination cellular telephone and pager apparatus
    24.
    发明授权
    Combination cellular telephone and pager apparatus 失效
    组合式蜂窝电话和寻呼机

    公开(公告)号:US5898758A

    公开(公告)日:1999-04-27

    申请号:US312786

    申请日:1994-09-26

    申请人: Michael Rosenberg

    发明人: Michael Rosenberg

    摘要: The instant invention is a paging device which couples to a cellular telephone allowing independent use of the cellular telephone and the paging unit. The paging unit includes a speaker for converting received signals into a dial tone for placement against either a conventional land based telephone or a cellular telephone for automatically redialing of numbers received by the paging unit. The paging unit can be coupled to a compatible cellular telephone wherein the pager and telephone can be carried as a single unit allowing screening of incoming calls and an automatic callback of received paged calls.

    摘要翻译: 本发明是一种寻呼设备,其耦合到允许独立使用蜂窝电话和寻呼单元的蜂窝电话。 寻呼单元包括用于将接收到的信号转换成拨号音的扬声器,用于与传统的基于陆地的电话或蜂窝电话相对放置,用于自动重拨由寻呼单元接收的号码。 寻呼单元可以耦合到兼容的蜂窝电话,其中寻呼机和电话可以作为单个单元携带,允许接收来电的屏蔽和接收到的呼叫呼叫的自动回拨。