Method and catalyst system for the production of para-xylene

    公开(公告)号:US10144006B2

    公开(公告)日:2018-12-04

    申请号:US14802631

    申请日:2015-07-17

    Abstract: A catalyst system is disclosed for producing para-xylene from a C8 hydrocarbon mixture comprising ethylbenzene and at least one xylene isomer other than para-xylene. The catalyst system comprises a first catalyst bed and a second catalyst bed. The first catalyst bed comprises a first zeolite and a rhenium hydrogenation component. The first zeolite has a constraint index from 1 to 12, an average crystal size from 0.1 to 1 micron and has been selectivated to have an ortho-xylene sorption time of greater than 1200 minutes based on its capacity to sorb 30% of the equilibrium capacity of ortho-xylene at 120° C. and an ortho-xylene partial pressure of 4.5±0.8 mm of mercury. The second catalyst bed comprises a second zeolite and a rhenium hydrogenation component. The second zeolite has a constraint index ranging from 1 to 12 and an average crystal size of less than 0.1 micron.

    Process and Catalyst for C9+ Aromatics Conversion
    15.
    发明申请
    Process and Catalyst for C9+ Aromatics Conversion 审中-公开
    C9 +芳烃转化的工艺和催化剂

    公开(公告)号:US20150025283A1

    公开(公告)日:2015-01-22

    申请号:US14311393

    申请日:2014-06-23

    Abstract: The invention is directed to a multimetallic catalyst and its use in a reactor system in a C9+ aromatics conversion process in order to reduce the saturation of aromatic species, reduce the production of C6+ non-aromatics byproducts, and achieve higher benzene purity. The multimetallic catalyst exhibits improved selectivity towards aromatic hydrocarbons in comparison to a traditional Pt/ZSM-5 catalyst and comprises ZSM-5, a Group 6-10 metal, and an additional metal not in Group 6-10. The C9+ aromatics conversion reactor system comprises a top bed containing the multimetallic catalyst for dealkylation of ethyl and propyl side chains, a second bed containing a catalyst comprising a hydrogenation component for transalkylation, and an optional third bed containing a catalyst without a hydrogenation component to convert non-aromatic hydrocarbons to gas products.

    Abstract translation: 本发明涉及一种多金属催化剂及其在C9 +芳族化合物转化方法中的反应器系统中的用途,以减少芳族物质的饱和度,减少C6 +非芳族化合物副产物的产生,并获得更高的苯纯度。 与传统的Pt / ZSM-5催化剂相比,多金属催化剂对芳族烃的选择性提高,并且包含ZSM-5,6-10族金属和不在6-10族中的另外的金属。 C9 +芳族化合物转化反应器系统包括含有用于乙基和丙基侧链脱烷基化的多金属催化剂的顶层,含有包含用于烷基转移的氢化组分的催化剂的第二床和含有不具有氢化组分以转化的催化剂的任选的第三床 非芳香烃气体产品。

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