Isomerization of olefins by alkylation and dealkylation of aromatic
hydrocarbons
    2.
    发明授权
    Isomerization of olefins by alkylation and dealkylation of aromatic hydrocarbons 失效
    芳烃的烷基化和脱烷基化使烯烃异构化

    公开(公告)号:US5811623A

    公开(公告)日:1998-09-22

    申请号:US872003

    申请日:1997-06-09

    CPC分类号: C07C11/02 Y02P20/127

    摘要: A isomerization process for C.sub.4 to C.sub.15 olefins carried out by the reaction of C.sub.4 to C.sub.15 olefins, having a first skeletal distribution, with aromatic compounds under alkylation conditions to produce an alkylated aromatic product, dealkylation of the alkylated aromatic product under dealkylation conditions to produce a dealkylated product comprising said aromatic compounds and olefins corresponding to the olefins in the alkylation and having a second skeletal distribution different than said first skeletal distribution. Acidic catalysts such as molecular sieves are used in both alkylation and dealkylation. The reactions may be carried out in either straight pass fixed beds or in catalytic distillation reactors.

    摘要翻译: 在烷基化条件下通过与烷基化条件下的芳香族化合物反应生成烷基化芳族化合物的C4至C15烯烃的反应进行C4至C15烯烃的异构化方法,在脱烷基化条件下将烷基化芳族化合物脱烷基化以产生 脱烷基化产物包含所述芳族化合物和对应于烷基化中的烯烃的烯烃,并且具有不同于所述第一骨架分布的第二骨架分布。 酸性催化剂如分子筛用于烷基化和脱烷基化。 反应可以在直通固定床或催化蒸馏反应器中进行。

    Process for the Production of Xylenes
    8.
    发明申请
    Process for the Production of Xylenes 有权
    生产二甲苯的方法

    公开(公告)号:US20160101405A1

    公开(公告)日:2016-04-14

    申请号:US14972223

    申请日:2015-12-17

    摘要: In a process for producing para-xylene, a feed stream comprising C6+ aromatic hydrocarbons is separated into a C7— aromatic hydrocarbon-containing stream, a C8 aromatic hydrocarbon-containing stream, and a C9+ aromatic hydrocarbon-containing stream. The C7− aromatic hydrocarbon-containing stream is contacted with a methylating agent to convert toluene to xylenes and produce a methylated effluent stream. Ethylbenzene is removed from the C8 aromatic hydrocarbon-containing stream, para-xylene is recovered from the ethylbenzene-depleted C8 aromatic hydrocarbon-containing stream and the methylated effluent stream in a para-xylene recovery section to produce a para-xylene depleted stream, which is then contacted with a xylene isomerization catalyst under liquid phase conditions effective to isomerize xylenes in the para-xylene depleted stream and produce an isomerized stream. The C9+-containing stream with a transalkylation catalyst under conditions effective to convert C9+-aromatics to C8−-aromatics and produce a transalkylated stream, which is recycled together with the isomerized stream to the para-xylene recovery section.

    摘要翻译: 在制备对二甲苯的方法中,将包含C 6 +芳族烃的进料流分离成含C7-芳香族烃的物流,含C 8芳族烃的物流和含有C 9 +芳族烃的物流。 使含C7-芳族烃的物流与甲基化剂接触以将甲苯转化为二甲苯并产生甲基化流出物流。 从含有C8芳族烃的物流中除去乙苯,从对苯二甲苯回收部分中的乙苯贫化C8芳族烃流和甲基化流出物流中回收对二甲苯以产生对二甲苯贫化物流,其中 然后在液相条件下与二甲苯异构化催化剂接触,有效地使对二甲苯贫化物流中的二甲苯异构化并产生异构化的物流。 含有C 9+的物流与烷基转移催化剂在有效地将C 9+芳族化合物转化为C 8 - 芳族化合物并产生烷基转移反应的物流的条件下进行反应,该物流与异构化物流一起再循环到对二甲苯回收段。

    Dealkylation process
    9.
    发明授权
    Dealkylation process 有权
    脱烷基化方法

    公开(公告)号:US09067854B2

    公开(公告)日:2015-06-30

    申请号:US14473464

    申请日:2014-08-29

    IPC分类号: C07C4/18 C07C4/14 C07C5/10

    摘要: In a process for dealkylating a poly-alkylated aromatic compound, a feed comprising at least one poly-alkylated aromatic compound selected from polypropylbenzene, polybutylbenzene, and polycyclohexylbenzene is introduced into a reaction zone. The feed is then contacted in the reaction zone with an acid catalyst under conditions effective to dealkylate at least a portion of the poly-alkylated aromatic compound and produce a first reaction product comprising at least one mono-alkylated aromatic compound.

    摘要翻译: 在聚烷基化芳族化合物的脱烷基化方法中,将包含至少一种选自聚丙基苯,聚丁基苯和聚环己基苯的多烷基化芳族化合物的进料引入反应区。 然后在有效使至少一部分聚烷基化芳族化合物脱烷基化的条件下,将该进料在反应区中与酸催化剂接触,并产生包含至少一种单烷基化芳族化合物的第一反应产物。

    HEAVY ALKYLBENZENE TRANSALKYLATION OPERATING COST REDUCTION
    10.
    发明申请
    HEAVY ALKYLBENZENE TRANSALKYLATION OPERATING COST REDUCTION 失效
    重金属离子交换操作成本降低

    公开(公告)号:US20130096357A1

    公开(公告)日:2013-04-18

    申请号:US13690760

    申请日:2012-11-30

    申请人: UOP LLC

    IPC分类号: C07C4/14

    摘要: A process for increasing the production of monoalkylbenzenes is presented. The process includes utilizing a transalkylation process to convert dialkylbenzenes to monoalkylbenzenes. The transalkylation process recycles a portion of the effluent stream from the transalkylation reactor back to the feed of the transalkylation reactor. The recycled dialkylbenzenes and a portion of the recycled benzene are converted to monoalkylbenzenes.

    摘要翻译: 提出了增加单烷基苯生产的方法。 该方法包括利用烷基转移方法将二烷基苯转化为单烷基苯。 烷基转移方法将来自烷基转移反应器的一部分流出物料流再循环回烷基转移反应器的进料。 再循环的二苯基苯和一部分再循环的苯被转化为单烷基苯。