公开(公告)号：US10906851B2

公开(公告)日：2021-02-02

申请号：US16074220

申请日：2017-02-09

Applicant: EXXONMOBIL CHEMICAL PATENTS INC. ,  GEORGIA TECH RESEARCH CORPORATION

Inventor： Meha Rungta ,  Robert G. Tinger ,  Jeevan S. Abichandani ,  Dana L. Pilliod ,  John R. Porter ,  Anthony Go ,  Sankar Nair ,  Ke Zhang

IPC: C07C5/27 ,  B01D3/14 ,  B01D15/18 ,  B01J20/16 ,  B01J20/22 ,  B01J29/70 ,  B01J35/00 ,  B01J35/10 ,  C07C7/00 ,  C07C7/04 ,  C07C7/12

Abstract: Para-xylene is separated from a mixture of xylenes and ethylbenzene by a separation process. An ortho-selective adsorbent is used to reduce the ortho-xylene concentration of the xylenes, prior to contact of the xylenes and ethylbenzene with a para-selective adsorbent. The stream rich in ortho-xylene may be isomerized in the liquid phase to increase the amount of para-xylene therein. The para-xylene-depleted stream may be treated in the vapor phase to remove the ethylbenzene and then subjected to isomerization in the liquid phase to produce a stream having a higher than equilibrium amount of para-xylene.

公开(公告)号：US10358401B2

公开(公告)日：2019-07-23

申请号：US15747951

申请日：2016-07-29

Applicant: EXXONMOBIL CHEMICAL PATENTS INC. ,  GEORGIA TECH RESEARCH CORPORATION

Inventor： Meha Rungta ,  Jeevan S. Abichandani ,  Dana L. Pilliod ,  Robert G. Tinger ,  Anthony Go ,  Ke Zhang ,  Sankar Nair ,  Jason Gee ,  David Sholl

IPC: C07C7/12 ,  B01D15/18 ,  B01D3/14 ,  C07C5/27 ,  C07C7/00 ,  C07C7/04

Abstract: Para-xylene is separated from a mixture of C8 aromatics using a simulated moving bed (SMB) adsorption process, wherein a MOF is used as an adsorbent and an alkane or alkene having 7 or less carbon atoms, such as hexane or heptane is used as desorbent. Because of the difference in boiling points of a hexane or heptane desorbent as compared to conventional desorbents such as toluene or para-diethylbenzene, less energy is required to separate hexane or heptane from C8 aromatics by distillation than the energy required to separate toluene or diethylbenzene from C8 aromatics by distillation.

公开(公告)号：US20130331633A1

公开(公告)日：2013-12-12

申请号：US13964283

申请日：2013-08-12

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Anthony Go ,  Dana L. Pilliod ,  John R. Porter

IPC: C07C7/13

CPC classification number: C07C7/13 ,  B01D15/1807 ,  B01D15/1821 ,  B01D15/1828 ,  B01D15/1835 ,  B01D2215/023 ,  C07C7/12 ,  C10G25/08 ,  C07C15/08

Abstract: A process for separating a product from a multicomponent feedstream to an adsorption apparatus or system. The apparatus or system may comprise a moving-bed or a simulated moving-bed adsorption means. The product comprises at least one organic compound, such as an aryl compound with alkyl substitutes. In embodiments the conduits used to supply the feedstream to the apparatus or system are flushed with media of multiple grades. In embodiments the process achieves improvements in one or more of efficiency of adsorption separation, capacity of adsorption apparatus systems, and purity of product attainable by adsorption process.

Abstract translation: 将产物从多组分进料流分离到吸附装置或系统的方法。 该装置或系统可包括移动床或模拟移动床吸附装置。 产物包含至少一种有机化合物，例如具有烷基取代基的芳基化合物。 在实施例中，用于将进料流供应到设备或系统的管道用多个等级的介质冲洗。 在实施方案中，该方法实现了吸附分离效率，吸附装置系统的容量和通过吸附过程可获得的产物的纯度中的一种或多种的改进。