Two-bed liquid phase isomerization method

• Main Authors: JAN DENG-YANG, KUZMANICH GREGORY B, DEAK VERONICA G
• Format: Patent
• Language: Chinese; English
• Published: 09.09.2022
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

A process for ethylbenzene conversion and xylene isomerization of an alkylaromatics feed mixture is described. In a C8 aromatic hydrocarbon isomerization zone, a C8 alkyl aromatic hydrocarbon feed mixture may be contacted in succession with two catalyst beds in the liquid phase. The first catalyst comprises a passivated zeolite for the conversion of ethylbenzene, the passivated zeolite containing a ten-membered ring channel framework. The second catalyst comprises a UZM-54 zeolite for the selective isomerization of paraxylene. 本发明描述了一种用于烷基芳烃进料混合物的乙基苯转化和二甲苯异构化的方法。在C8芳族烃异构化区中，C8烷基芳烃进料混合物可以与两个催化剂床在液相中相继地接触。第一催化剂包含用于乙基苯的转化的钝化沸石，所述钝化沸石含有十元环通道骨架。第二催化剂包含用于对二甲苯的选择性异构化的UZM-54沸石。