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    Process for co-producing para-xylene and styrene
    6.
    发明授权
    Process for co-producing para-xylene and styrene 有权
    共生产对二甲苯和苯乙烯的方法

    公开(公告)号：US07592499B2

    公开(公告)日：2009-09-22

    申请号：US10666523

    申请日：2003-09-22

    申请人： Luc Wolff ,  Philibert Leflaive ,  Alain Methivier

    发明人： Luc Wolff ,  Philibert Leflaive ,  Alain Methivier

    IPC分类号： C07C7/00

    CPC分类号： C07C7/12 ,  C07C5/3332 ,  C07C7/13 ,  C07C2523/14 ,  C07C2523/86 ,  C07C15/46 ,  C07C15/08 ,  C07C15/073

    摘要： A process for co-producing para-xylene and styrene from a feed (1) of hydrocarbons containing xylenes and ethylbenzene is described, the process comprising the following succession of steps: a step for separating the feed in a simulated moving bed in an adsorption column (6) containing beds of an adsorbent, from which an extract that is rich in para-xylene (7a) of at least 99.7% purity and at least one raffinate (7b) containing ethylbenzene, ortho-xylene, meta-xylene and a very small quantity of para-xylene is withdrawn; a step for dehydrogenating (10) the ethylbenzene contained in the raffinate (7b) to styrene; at least one step for primary separation of the stream (11) from the dehydrogenation step (10), to eliminate by-products; a step for separating the purified mixture (18) derived from the stream (11) containing styrene, unconverted ethylbenzene, meta-xylene and ortho-xylene, from which a stream (21a) that is rich in styrene of at least 99.8% purity and a stream (21b) containing unconverted ethylbenzene, meta-xylene and ortho-xylene is withdrawn; and a step for isomerising the stream (21b), the effluent being recycled to the adsorption column (6).

    摘要翻译： 描述了从含有二甲苯和乙苯的烃的进料（1）共同生产对二甲苯和苯乙烯的方法，该方法包括以下连续步骤：在吸附塔中的模拟移动床中分离进料的步骤 （6）含有吸附剂的床，富含至少99.7％纯度的对二甲苯（7a）的提取物和至少一种含有乙苯，邻二甲苯，间二甲苯和至少一种二甲苯的提余物（7b） 撤回少量的对二甲苯; （10）将残液（7b）中所含的乙苯脱氢成苯乙烯的步骤; 用于从脱氢步骤（10）中初始分离料流（11）的至少一个步骤，以消除副产物; 用于分离源自含有苯乙烯，未转化的乙苯，间二甲苯和邻二甲苯的物流（11）的纯化的混合物（18）的步骤，其中富含至少99.8％纯度的苯乙烯流（21a）和 取出含有未转化的乙苯，间二甲苯和邻二甲苯的料流（21b） 和将物流（21b）异构化的步骤，将废液再循环至吸附塔（6）。

    Process for the preparation of dixylylpropane
    8.
    发明授权
    Process for the preparation of dixylylpropane 失效
    二辛基丙烷的制备方法

    公开(公告)号：US5300717A

    公开(公告)日：1994-04-05

    申请号：US44584

    申请日：1993-04-08

    申请人： Freimund Rohrscheid

    发明人： Freimund Rohrscheid

    IPC分类号： C07B61/00 ,  C07C2/68 ,  C07C2/70 ,  C07C2/86 ,  C07C5/333 ,  C07C15/02 ,  C07C15/16 ,  C07C15/44 ,  C07C17/08 ,  C07C22/04 ,  C07C2/00

    CPC分类号： C07C5/3332 ,  C07C15/16 ,  C07C17/08 ,  C07C2/68 ,  C07C2/70 ,  C07C2/861 ,  C07C2523/04 ,  C07C2523/26 ,  C07C2523/745 ,  C07C2523/86 ,  C07C2527/1213 ,  C07C2527/126 ,  C07C2527/173 ,  C07C2531/02

    摘要： In a multi-step process, dixylylpropane is obtained inter alia via the hitherto unknown 1,2-dimethyl-4-(.alpha.-chloroisopropyl)benzene, the readily accessible compounds o-xylene and propene being employed as starting compounds. The process yields the desired compound in high yield and isomer purity and is distinguished by a small amount of by-products. It is therefore particularly suitable for further processing without problems. The process involves the sequence of (a) Friedel-Crafts alkylation of ortho-xylene with propylene, (b) dehydrogenation of the isoproplyxlene into isopropenylxylene, (c) which is then hydrochlorinated into chloroisopropylxylene, (d) and then alkylated with a second ortho-xylene modecule to obtain the final product dixylylpropane.

    摘要翻译： 在多步法中，特别是通过迄今为止未知的1,2-二甲基-4 - （（α） - 氯异丙基）苯获得二甲基丙烷，易于获得的邻二甲苯和丙烯用作起始化合物。 该方法以高产率和异构体纯度产生所需化合物，并且通过少量的副产物来区分。 因此，特别适合进一步处理而没有问题。 该方法涉及（a）邻二甲苯与丙烯的Friedel-Crafts烷基化反应，（b）将异丙烯烯脱氢成异丙烯基二甲苯，（c）然后氢氯化成氯异丙基二甲苯，（d）然后用第二邻位烷基化 二异氰酸酯，得到最终产物二辛基丙烷。