Process for the dissociation of MTBE
    11.
    发明授权
    Process for the dissociation of MTBE 有权
    MTBE解离过程

    公开(公告)号:US07919662B2

    公开(公告)日:2011-04-05

    申请号:US11838340

    申请日:2007-08-14

    IPC分类号: C07C1/20

    摘要: Isobutene is prepared by dissociation of MTBE in the gas phase, by a) fractional distillation of an MTBE-containing stream comprising feed MTBE (I) and a recycle stream (VIII) to give an MTBE-containing overhead stream (II) and a bottom stream (III) having a boiling point higher than MTBE, b) catalytic dissociation of the overhead stream (II) obtained in step a) to give a dissociation product (IV), c) separation by distillation of the dissociation product (IV) obtained in step b) into an overhead stream (V) comprising more than 90% by mass of isobutene and a bottom stream (VI) comprising diisobutene, MTBE and more than 50% of the methanol present in the dissociation product (IV), d) fractional distillation of the bottom stream obtained in step c) under conditions under which the methanol is obtained as bottom product (VII) and more than 99% of the MTBE is obtained in the overhead product (VIII), and e) recirculation of the overhead product (VIII) to step a).

    摘要翻译: 通过a)分馏含有进料MTBE(I)和再循环物流(VIII)的含MTBE的物流,得到含MTBE的塔顶馏出物流(II)和底部 沸点高于MTBE的流(III),b)步骤a)中获得的塔顶馏出物流(II)的催化解离,得到解离产物(IV),c)通过蒸馏分离获得的解离产物(IV) 在步骤b)中进入包含大于90质量%的异丁烯的塔顶物流(V)和包含二异丁烯,MTBE和存在于解离产物(IV)中的甲醇的50%以上的底部物流(VI),d) 在塔顶馏出物(VIII)中获得步骤c)中获得的底部物流的分馏,其中获得作为底部产物(VII)的甲醇和高于99%的MTBE的馏分,和e)塔顶馏出物的再循环 产物(VIII)至步骤a)。

    Stabilizing rhodium catalysts for the hydroformylation of olefins
    19.
    发明授权
    Stabilizing rhodium catalysts for the hydroformylation of olefins 有权
    稳定的铑催化剂用于烯烃的加氢甲酰化

    公开(公告)号:US06500991B2

    公开(公告)日:2002-12-31

    申请号:US09960936

    申请日:2001-09-25

    IPC分类号: C07C4550

    摘要: Aldehydes are prepared by a process, which comprises: hydroformylating olefins having 3 to 21 carbon atoms under an atmosphere of CO/H2 in the presence of a rhodium catalyst in a hydroformylation reactor; and upon discharging the reaction product from the reactor, a) separating the discharged material into a gaseous phase and a liquid phase, b) separating the liquid phase into a top fraction containing unconverted olefins and aldehydes and a bottoms fraction containing the rhodium catalyst, and c) cooling the bottoms fraction below the temperature of the material discharged from the hydroformylation reactor and feeding a gas containing carbon monoxide into the bottoms fraction.

    摘要翻译: 醛通过一种方法制备,该方法包括:在加氢甲酰化反应器中在铑催化剂存在下,在CO / H 2的气氛下加氢甲酰化具有3至21个碳原子的烯烃; 然后将反应产物从反应器中排出,a)将排出的物质分离成气相和液相,b)将液相分离成含有未转化的烯烃和醛的顶级馏分和含有铑催化剂的塔底馏分,和c) 将底部馏分冷却至低于从加氢甲酰化反应器排放的物质的温度,并将含有一氧化碳的气体进料到塔底馏分中。