Process for the continuous preparation of alkyl nitrites
    3.
    发明授权
    Process for the continuous preparation of alkyl nitrites 失效
    连续制备亚硝酸烷基酯的方法

    公开(公告)号:US5412147A

    公开(公告)日:1995-05-02

    申请号:US157779

    申请日:1993-11-24

    IPC分类号: C07C201/04 C07C203/00

    CPC分类号: C07C201/04

    摘要: C.sub.1 -C.sub.6 -Alkyl nitrites can be prepared by reacting nitrogen dioxide with C.sub.1 -C.sub.6 -alcohols, by, in a counterflow-operated column, feeding the alcohol or an alcohol/water mixture into the upper part of the column and the nitrogen dioxide or a nitrogen dioxide/inert gas mixture into the lower part of the column. The resulting alkyl nitrite is removed from the column as the top product and the co-formed nitric acid is removed from the column as the bottom product.

    摘要翻译: C 1 -C 6烷基亚硝酸盐可以通过使二氧化氮与C 1 -C 6醇反应来制备,在逆流操作的塔中,将醇或醇/水混合物进料到塔的上部和二氧化氮或 二氧化氮/惰性气体混合物进入塔的下部。 所得到的亚硝酸烷基酯作为顶部产物从塔中除去,共同形成的硝酸作为底部产物从塔中除去。

    Process for the preparation of dialkyl carbonates
    4.
    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

    IPC分类号: B01J21/16 C07C68/00 C07C69/96

    CPC分类号: C07C68/00 Y02P20/582

    摘要: 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.

    摘要翻译: 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。

    Process for the preparation of carbazates
    6.
    发明授权
    Process for the preparation of carbazates 失效
    制备肼基甲酸酯的方法

    公开(公告)号:US5756824A

    公开(公告)日:1998-05-26

    申请号:US730627

    申请日:1996-10-21

    IPC分类号: C07C281/02 C07C261/00

    CPC分类号: C07C281/02

    摘要: Alkyl carbazates of the formula R.sup.1 --O--CO--NH--NH.sub.2 (I) are prepared in an advantageous manner by reacting an alkyl carbazate of the formula R.sup.2 --O--CO--NH--NH.sub.2 (II) with alcohols of the formula R.sup.1 --OH (III) in the presence of a catalyst, where the symbols used in the formulae are as defined in the description.

    摘要翻译: 通过使式R 2 -O-CO-NH-NH 2(II)的肼基甲酸烷基酯与式R1-0的醇反应制备式R 1 -O-CO-NH-NH 2(I)的烷基肼基甲酸酯, OH(III)在催化剂存在下进行,其中式中使用的符号如说明书中所定义。

    Process for the preparation of dialkyl carbonates
    7.
    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:US5360922A

    公开(公告)日:1994-11-01

    申请号:US23302

    申请日:1993-02-26

    摘要: Dialkyl carbonates can be prepared by the reaction of carbon monoxide with alkyl nitrites in a continuous gas phase reaction, using a platinum group metal catalyst on an alumosilicate zeolite having acidic centers, preferably in the H.sup.+ form, as a support, which catalyst may optionally comprise additional material of a compound of antimony, bismuth, aluminum, 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.

    摘要翻译: 碳酸二烷基酯可以通过在连续气相反应中使用一氧化碳与烷基亚硝酸盐的反应来制备,使用铂族金属催化剂在具有酸性中心的铝硅酸盐沸石,优选以H +形式作为载体,该催化剂可任选地包含 锑,铋,铝,铜,钒,铌,钽,锡,铁,钴,镍或它们中的多种的混合物的化合物的附加材料和在反应过程中间歇或连续地加入的卤化氢 。 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。

    Process for the preparation of dialkyl carbonates
    9.
    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:US5288894A

    公开(公告)日:1994-02-22

    申请号:US958853

    申请日:1992-10-08

    CPC分类号: C07C68/00 Y02P20/582

    摘要: Dialkyl carbonates can be prepared by reaction of carbon monoxide with alkyl nitrites in a continuous gas phase reaction, in which a platinum metal catalyst of oxidic or hydroxidic compounds of elements from group Vb of the Periodic Table (Mendeleev) as supports and, if desired, addition of an antimony, bismuth, aluminium, copper, vanadium, niobium, tantalum, tin, iron, cobalt, nickel compound or a mixture of a plurality thereof on this catalyst are used, and the hydrogen halide which is discharged from the reactor together with the reaction mixture is batchwise or continuously replaced in the course of the reaction. This results in the formation of dialkyl carbonates in almost quantitative selectivity; the corresponding dialkyl oxalates can, in most cases, not be detected.

    摘要翻译: 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,其中将元素周期表(Mendeleev)中元素的氧化或氢化化合物的铂金属催化剂作为载体,如果需要, 使用在该催化剂上添加锑,铋,铝,铜,钒,铌,钽,锡,铁,钴,镍化合物或其多种混合物,将从反应器排出的卤化氢与 反应混合物在反应过程中间歇或连续替代。 这导致几乎定量选择性形成碳酸二烷基酯; 在大多数情况下,相应的草酸二烷基酯可以不被检测。