Process for the preparation of dialkyl carbonates
    52.
    发明授权
    Process for the preparation of dialkyl carbonates 失效
    制备碳酸二烷基酯的方法

    公开(公告)号:US5319124A

    公开(公告)日:1994-06-07

    申请号:US023303

    申请日:1993-02-26

    CPC classification number: C07C68/00 Y02P20/582

    Abstract: Dialkyl carbonates can be prepared by the reaction of carbon monoxide with alkyl nitrites in a continuous gas phase reaction, using a platinum metal catalyst on an amorphous alumosilicate having a content of 30-80 atom% Al, based on the sum of Al and Si, as a support, which catalyst may optionally comprise additional material of a compound of antimony, bismuth, aluminium, copper, vanadium, niobium, tantalum, tin, iron, cobalt, nickel or a mixture of a plurality of these, and hydrogen halide being added in the course of the reaction intermittently or continuously. In this reaction, the dialkyl carbonates are formed with almost quantitative selectivity; the corresponding dialkyl oxalates cannot be detected in most cases.

    Abstract translation: 碳酸二烷基酯可以通过一氧化碳与亚硝酸烷基酯在连续气相反应中的反应来制备,使用铂金属催化剂,其含量为30-80原子%Al的无定形铝硅酸盐,基于Al和Si的总和, 作为载体,该催化剂可以任选地包含锑,铋,铝,铜,钒,铌,钽,锡,铁,钴,镍或其中多个的混合物和添加的卤化氢的化合物的附加材料 在反应过程中间歇或连续。 在该反应中,以几乎定量的选择性形成碳酸二烷基酯; 在大多数情况下不能检测到相应的草酸二烷基酯。

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