公开(公告)号：US10975006B2

公开(公告)日：2021-04-13

申请号：US16516687

申请日：2019-07-19

申请人： SCG Chemicals Company Limited ,  Sulzer Management AG

发明人： Zhongyi Ding ,  Sachin Joshi ,  Weihua Jin

IPC分类号： C07C5/27 ,  C07C7/08 ,  C07C7/14 ,  C07C7/12 ,  C07C7/00

摘要： Para-xylene production processes are disclosed, with such processes being integrated with extractive distillation or other separation to effectively separate, for example to remove and recover, ethylbenzene and other components that co-boil with the isomers of xylene. This allows for xylene isomerization, downstream of the separation of para-xylene from its other isomers, to be operated under milder conditions (e.g., liquid phase, absence of added hydrogen) without the need for ethylbenzene conversion. The associated decreased yields of byproducts such as light gases and non-aromatic hydrocarbons, together with the generation of purified ethylbenzene having value for styrene monomer production, can significantly improve overall process economics.