公开(公告)号：US11453653B2

公开(公告)日：2022-09-27

申请号：US17259979

申请日：2019-06-17

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Jintang Duan

IPC: C07D301/08 ,  C07D303/04

Abstract: Systems and methods for producing ethylene oxide (EO) are disclosed. Ethylene oxide is produced by direct oxidizing ethylene with oxygen in a reactor. The effluent from the reactor is processed to produce (a) a product stream comprising water and ethylene oxide, (b) a reabsorber overhead stream comprising ethylene, methane, argon, and carbon dioxide, and (c) a carbonate flash gas stream comprising carbon dioxide, ethylene, methane, and water. The reabsorber overhead stream and the carbonate flash gas stream are combined to form a reclaim gas stream. The reclaimed gas stream is separated in a membrane separation unit to remove carbon dioxide and argon, forming a recycle stream comprising primarily ethylene and methane, collectively.

公开(公告)号：US11708315B2

公开(公告)日：2023-07-25

申请号：US17914677

申请日：2021-03-04

Applicant: SABIC Global Technologies B.V.

Inventor： Srikant Gopal ,  Adel Al-Dossari ,  Jintang Duan

IPC: C07C29/76 ,  B01D15/20 ,  B01J47/016 ,  B01J39/05 ,  B01D15/36 ,  B01J39/20

CPC classification number: C07C29/76 ,  B01D15/20 ,  B01D15/362 ,  B01J39/05 ,  B01J39/20 ,  B01J47/016

Abstract: Method for lowering aldehyde content in a mixture comprising (i) diethylene glycol (DEG) and/or triethylene glycol (TEG) and (ii) aldehyde are disclosed. An ion exchange resin is soaked in monoethylene glycol. The mixture comprising 5 to 200 ppm aldehyde is then flowed to make contact with the soaked ion exchange resin to produce a product comprising DEG and/or TEG and less than 15 ppm aldehyde.