Invention Grant
- Patent Title: Method and apparatus for circulating a glycol stream, and method of producing a natural gas product stream
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Application No.: US14409420Application Date: 2013-06-20
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Publication No.: US09724637B2Publication Date: 2017-08-08
- Inventor: Bei Li , Stephen John Mills , Johan Jan Barend Pek
- Applicant: SHELL OIL COMPANY
- Applicant Address: US TX Houston
- Assignee: SHELL OIL COMPANY
- Current Assignee: SHELL OIL COMPANY
- Current Assignee Address: US TX Houston
- Priority: EP12173104 20120622; EP12187663 20121008
- International Application: PCT/EP2013/062852 WO 20130620
- International Announcement: WO2013/190030 WO 20131227
- Main IPC: B01D3/14
- IPC: B01D3/14 ; B01D3/32 ; B01D53/14 ; B01D53/18 ; C10L3/10 ; B01D53/26 ; C07C31/20

Abstract:
The methods apparatuses described herein involve recovering of glycol from an aqueous phase to form a stream of recovered glycol and a glycol recovery system. The aqueous phase is fed to the top of a lower theoretical stage in a distillation column. An overhead vapor stream is drawn from the distillation column overhead of an upper theoretical stage, and a bottom stream comprising a stream of regenerated glycol is drawn from the distillation column via a bottom outlet configured below the lower theoretical stage. The stream of recovered glycol comprises the regenerated glycol. In addition, a first middle theoretical stage is situated within the distillation column gravitationally above the lower theoretical stage and below the upper theoretical stage. A side stream of liquid water is drawn from the bottom of the upper theoretical stage in the distillation column.
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