Method for removing nitrosation agent(s) from a nitrated aromatic
compound
    1.
    发明授权
    Method for removing nitrosation agent(s) from a nitrated aromatic compound 失效
    从硝化芳族化合物中除去亚硝化剂的方法

    公开(公告)号:US4338473A

    公开(公告)日:1982-07-06

    申请号:US151286

    申请日:1980-05-19

    CPC分类号: C07C201/16 C07B43/02

    摘要: Nitrosation agent(s), contained as by-products in nitrated aromatic compounds after nitration with nitric acid or nitration acid, are removed by a water treatment, wherein the water is distilled off at least partially in vapor form, advantageously under reduced pressure. In the further reaction of the nitrocompounds treated in this manner undesired nitrosamines are practically not formed. The process is especially suitable for the manufacture of 4-di-n-propylamino-3,5-dinitrobenzotrifluoride (Trifluralin), a valuable herbicide, substantially free from nitrosamine(s).

    摘要翻译: 通过水处理除去在用硝酸或硝酸酸硝化之后在硝化芳族化合物中作为副产物包含的亚硝化剂,其中有利地在减压下至少部分地以蒸气形式蒸馏掉水。 在以这种方式处理的硝基化合物的进一步反应中,实际上不形成不希望的亚硝胺。 该方法特别适用于生产基本上不含亚硝胺的有价值的除草剂4-二正丙基氨基-3,5-二硝基三氟甲苯(Trifluralin)。

    Hydraulic circuit for supplying a plurality of series-operated of a
hydraulically controlled installation
    5.
    发明授权
    Hydraulic circuit for supplying a plurality of series-operated of a hydraulically controlled installation 失效
    用于供应多个串联操作的液压控制装置的液压回路

    公开(公告)号:US5613361A

    公开(公告)日:1997-03-25

    申请号:US352449

    申请日:1994-12-09

    CPC分类号: B29C45/82 B29C2045/828

    摘要: A hydraulic circuit for supplying a plurality of series-operated consumers of a hydraulically controlled installation, in particular of an injection molding machine, having a pump with feed-flow pressure control, is described. To be able to slow down greater moving masses with very little expenditure in regard to circuitry and devices, only a portion of the consumers, such as the extruder, the injection unit and possibly the ejector are operated in open circulation, while at least one selected further consumer, such as the clamping unit of the injection molding machine, where a greater mass must be moved in alternating directions, is moved in semi-closed or closed circulation.

    摘要翻译: 描述了一种液压回路,其用于供给具有进料流压力控制的泵的液压控制设备的多个串联操作的使用者,特别是注射成型机。 为了能够在电路和设备方面以很少的支出减缓更大的移动质量,只有一部分消费者,例如挤出机,注射单元和可能的喷射器在开放循环中操作,而至少一个选择 进一步的消费者,例如注射成型机的夹紧单元,其中更大的质量必须在交替的方向上移动,在半封闭或闭合的循环中移动。