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    • 5. 发明授权
    • Isomerization of ethylbenzene and xylenes
    • 乙苯异构化和二甲苯
    • US06660896B1
    • 2003-12-09
    • US10418439
    • 2003-04-16
    • John Scott BuchananXiaobing FengGary David MohrDavid L. Stern
    • John Scott BuchananXiaobing FengGary David MohrDavid L. Stern
    • C07C527
    • C07C5/2708C07C2529/40C07C2529/74C07C15/08
    • In a process for isomerizing a feed comprising ethylbenzene and a mixture of xylene isomers, the feed is first contacted under xylene isomerization conditions with a first catalyst composition to produce an intermediate product having a higher para-xylene concentration than the feed, and then the intermediate product is contacted under ethylbenzene isomerization conditions with a second catalyst composition. The second catalyst composition comprises a hydrogenation-dehydrogenation component and a molecular sieve having 10-membered ring pores and is effective to selectively isomerize at least part of the ethylbenzene in the intermediate product to para-xylene and thereby produce a further product having a para-xylene concentration greater than the equilibrium concentration of para-xylene at said ethylbenzene isomerization conditions.
    • 在包含乙苯和二甲苯异构体的混合物的进料异构化的方法中,首先在二甲苯异构化条件下与第一催化剂组合物接触进料以产生具有比进料更高的对二甲苯浓度的中间产物,然后中间体 产物在乙苯异构化条件下与第二催化剂组合物接触。 第二催化剂组合物包含氢化脱氢组分和具有10元环孔的分子筛,并且有效地将中间产物中的至少部分乙苯选择性异构化成对二甲苯,从而产生另外具有对 - 所述乙苯异构化条件下二甲苯浓度大于对二甲苯的平衡浓度。