Invention Grant
- Patent Title: Method for separating materials by means of an extractive distillation process
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Application No.: US16072695Application Date: 2017-02-02
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Publication No.: US10793494B2Publication Date: 2020-10-06
- Inventor: Norbert Asprion
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen am Rhein
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen am Rhein
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@30f7a8d2
- International Application: PCT/EP2017/052215 WO 20170202
- International Announcement: WO2017/134143 WO 20170810
- Main IPC: C07C7/08
- IPC: C07C7/08 ; B01D3/00 ; B01D3/14 ; B01D3/32 ; B01D3/40 ; C07C67/54 ; C07C17/386 ; C01B7/07 ; C07C29/84 ; C07C45/83 ; C07C253/34 ; C07D307/08 ; C07C7/00 ; C07C9/10 ; C07C11/08 ; C07C11/16

Abstract:
A method for separating a mixture of materials A and B by extractive distillation, using an extraction medium having a higher affinity to B than to A, collecting a liquid fraction on a collecting tray and heated and partially evaporated in a first indirect heat exchanger, collecting the resultant vapor is released into the column and a non-evaporated proportion of the liquid fraction in the sump of the column, and a series of heating, separation and cooling where partially cooled extraction medium fraction is used as heating medium for a heat exchanger.
Public/Granted literature
- US20190031581A1 METHOD FOR SEPARATING MATERIALS BY MEANS OF AN EXTRACTIVE DISTILLATION PROCESS Public/Granted day:2019-01-31
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