Process for producing nitriles
    4.
    发明授权
    Process for producing nitriles 失效
    生产腈的工艺

    公开(公告)号:US5281745A

    公开(公告)日:1994-01-25

    申请号:US926173

    申请日:1992-08-07

    摘要: A process for producing a nitrile, which comprises subjecting an alkane and ammonia in the gaseous state to catalytic oxidation in the presence of a catalyst which satisfies the following conditions of (1) and (2):(1) the catalyst is represented by the empirical formula:Mo.sub.a V.sub.b Te.sub.c X.sub.x O.sub.n (1) wherein X is at least one element selected from the group consisting of Nb, Ta, W, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pd, Pt, Sb, Bi, B and Ce,______________________________________ when a = 1, b = 0.01 to 1.0, c = 0.01 to 1.0, x = 0.01 to 1.0, ______________________________________ and n is a number such that the total valency of the metal elements is satisfied; and(2) the catalyst has X-ray diffraction peaks at the following angles of 2.theta. in its X-ray diffraction pattern:______________________________________ Diffraction angles of 2.theta. (.degree.) ______________________________________ 22.1 .+-. 0.3 28.2 .+-. 0.3 36.2 .+-. 0.3 45.2 .+-. 0.3 50.0 .+-. 0.3. ______________________________________

    摘要翻译: 一种腈的制造方法,其特征在于,在满足以下(1)和(2)的条件的催化剂的存在下,使烷烃和气态氨进行催化氧化:(1)催化剂由 经验公式:MoaVbTecXxOn(1)其中X是选自Nb,Ta,W,Ti,Al,Zr,Cr,Mn,Fe,Ru,Co,Rh,Ni,Pd,Pt中的至少一种元素, Sb,Bi,B和Ce,-a = 1,-b = 0.01〜1.0,-c = 0.01〜1.0,-x = 0.01〜1.0,n为金属元素的总价 满意 和(2)催化剂在X射线衍射图中以2(θ)的相应角度具有X射线衍射峰:-1衍射角2(θ)(度)-22.1±0.3-28.2± 0.3-36.2±0.3-45.2±0.3-50.0±0.3。

    Process for the production of maleic anhydride
    5.
    发明授权
    Process for the production of maleic anhydride 有权
    马来酸酐生产工艺

    公开(公告)号:US06310219B1

    公开(公告)日:2001-10-30

    申请号:US09450126

    申请日:1999-11-26

    IPC分类号: C07D30760

    CPC分类号: C07C51/215 C07C57/145

    摘要: Disclosed is a process for the production of maleic anhydride, which comprises: reacting a hydrocarbon with an oxygen-containing gas in the presence of a catalyst; recovering maleic anhydride from the reaction gas; recovering unreacted hydrocarbon from the remaining gas; and returning the hydrocarbon thus recovered to the reactor for re-use, wherein said reaction is effected under the conditions such that the hydrocarbon concentration X (vol %) and oxygen concentration Y (vol %) in all the gases to be fed into the reactor, the hydrocarbon conversion Z (%) in the reactor and the oxygen concentration W (vol %) in all the effluent gases from the reactor satisfy the following relationships: Y≧20, X+Y≦70, 1≦Y/X≦5, and 20(Y−10)/X≦Z≦25Y/X or 2≦W≦10.

    摘要翻译: 公开了一种生产马来酸酐的方法,其包括:在催化剂存在下使烃与含氧气体反应; 从反应气中回收马来酸酐; 从剩余的气体中回收未反应的烃; 并将如此回收的烃返回到反应器中进行再利用,其中所述反应在所有要供入反应器的气体中的烃浓度X(体积%)和氧浓度Y(体积%)的条件下进行 ,反应器中的烃转化率Z(%)和来自反应器的所有流出气体中的氧浓度W(体积%)满足以下关系:

    Process for the preparation of maleic anhydride
    6.
    发明授权
    Process for the preparation of maleic anhydride 有权
    马来酸酐的制备方法

    公开(公告)号:US06620948B2

    公开(公告)日:2003-09-16

    申请号:US09901686

    申请日:2001-07-11

    IPC分类号: C07D30760

    CPC分类号: C07C51/215 C07C57/145

    摘要: Disclosed is a process for the production of maleic anhydride, which comprises: reacting a hydrocarbon with an oxygen-containing gas in the presence of a catalyst; recovering maleic anhydride from the reaction gas; recovering unreacted hydrocarbon from the remaining gas; and returning the hydrocarbon thus recovered to the reactor for re-use, wherein said reaction is effected under the conditions such that the hydrocarbon concentration X (vol %) and oxygen concentration Y (vol) in all the gases to be fed into the reactor, the hydrocarbon conversion Z (t) in the reactor and the oxygen concentration W (vol %) in all the effluent gases from the reactor satisfy the following relationships: Y≧20, X+Y≦70, 1≦Y/X≦5, and 20(Y−10)/X≦Z≦25Y/X or 2≦W≦10.

    摘要翻译: 公开了一种生产马来酸酐的方法,其包括:在催化剂存在下使烃与含氧气体反应; 从反应气中回收马来酸酐; 从剩余的气体中回收未反应的烃; 并将如此回收的烃返回到反应器中进行再利用,其中所述反应在使得要供入反应器的所有气体中的烃浓度X(体积%)和氧浓度Y(vol) 反应器中的烃转化率Z(t)和来自反应器的所有流出气体中的氧浓度W(体积%)满足以下关系:

    Fluidized bed reactor
    7.
    发明授权
    Fluidized bed reactor 有权
    流化床反应器

    公开(公告)号:US06657097B1

    公开(公告)日:2003-12-02

    申请号:US09520332

    申请日:2000-03-07

    IPC分类号: C07C400

    摘要: Disclosed is a fluidized bed reactor wherein the average cross-sectional area occupied by a cooling coil, a dummy pipe and/or a cyclone leg is 10% or more of the average cross-sectional area of said reactor in a dense-phase fluidized catalyst bed region. The fluidized bed reactor in the present invention allows an improved fluidization of catalyst and thus allows an efficient reaction of a hydrocarbon with an oxygen-containing gas in the presence of a catalyst.

    摘要翻译: 公开了一种流化床反应器,其中冷却盘管,虚拟管和/或旋风分离器占据的平均横截面面积为密相流化催化剂中所述反应器的平均截面面积的10%或更多 床区。 本发明的流化床反应器允许改进催化剂的流化,从而允许在催化剂存在下烃与含氧气体的有效反应。

    Process for producing maleic anhydride
    8.
    发明授权
    Process for producing maleic anhydride 失效
    马来酸酐生产工艺

    公开(公告)号:US6093835A

    公开(公告)日:2000-07-25

    申请号:US119723

    申请日:1998-07-21

    CPC分类号: C07C51/215 C07C51/42

    摘要: A process for producing maleic anhydride is described, which comprises (i) reacting a hydrocarbon with oxygen in a vapor phase in the presence of a catalyst to yield a reaction mixture gas containing maleic anhydride, (ii) bringing the reaction mixture gas into contact with an organic solvent to collect the maleic anhydride in the organic solvent, (iii) separating at least part of the maleic anhydride from the organic solvent, (iv) washing with an aqueous alkali solution at least part of the organic solvent from which maleic anhydride has been separated, and (v) reusing the resultant washed organic solvent and the residual organic solvent for contact with the reaction mixture gas.

    摘要翻译: 描述了生产马来酸酐的方法,其包括(i)在催化剂存在下使烃与氧气在气相中反应,得到含有马来酸酐的反应混合物气体,(ii)使反应混合物气体与 在有机溶剂中收集马来酸酐的有机溶剂,(iii)将至少部分马来酸酐与有机溶剂分离,(iv)用碱性水溶液洗涤至少部分马来酸酐具有的有机溶剂 分离,和(v)重复利用所得洗涤的有机溶剂和残留的有机溶剂与反应混合物气体接触。

    Process for the production of maleic anhydride
    9.
    发明授权
    Process for the production of maleic anhydride 有权
    马来酸酐生产工艺

    公开(公告)号:US06458971B1

    公开(公告)日:2002-10-01

    申请号:US09577157

    申请日:2000-05-24

    IPC分类号: C07D30760

    CPC分类号: C07C51/215 C07C57/145

    摘要: Disclosed is a process for the preparation of maleic anhydride which comprises subjecting an aliphatic hydrocarbon having four or more carbon atoms to gas phase oxidation reaction in the presence of a catalyst, wherein supposing that the function of reaction product gas composition is FL and the function of temperature and pressure of reaction product gas is FR, the safety index F satisfies the following relationship (1): F=FL−FR>0  (1) According to the present invention, it is possible that the loss of unreacted hydrocarbon and maleic anhydride as reaction product due to non-catalytic oxidation reaction is prevented while effecting the reaction in a stable manner, whereby the yield of maleic anhydride can be kept maximum while assuring safety.

    摘要翻译: 公开了一种制备马来酸酐的方法,其包括在催化剂存在下使具有四个或更多个碳原子的脂族烃进行气相氧化反应,其中假定反应产物气体组成的函数为FL, 反应产物气体的温度和压力为FR,安全指数F满足以下关系式(1):根据本发明,由于非催化氧化反应,作为反应产物的未反应的烃和马来酸酐的损失可能 在稳定地进行反应的同时被防止,从而马来酸酐的产率可以保持最大,同时确保安全性。