Invention Grant
- Patent Title: Process and plant for recovering acrylic acid
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Application No.: US14857967Application Date: 2015-09-18
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Publication No.: US09701612B2Publication Date: 2017-07-11
- Inventor: Ulrich Hammon , Thomas Walter , Markus Ottenbacher , Frank Huetten
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: DE102014114193 20140930
- Main IPC: C07C51/487
- IPC: C07C51/487 ; C07C51/44 ; C07C51/48 ; B01D3/34 ; B01D3/00 ; C07C57/04 ; B01D3/14 ; B01J19/24 ; C07C51/42

Abstract:
A process for recovering acrylic acid, including: a) division of a heated mother acid stream in direction of an absorption a condensation column and a dissociation column; b) feeding of a heated mother acid substream as runback to the dissociation column; c) feeding-in of at least one stripping gas stream to the dissociation column; d) feeding-in of a secondary component stream comprising oligomeric acrylic acid from the absorption column to the dissociation column; e) dissociation of part of oligomeric acrylic acid in the dissociation column to give monomeric acrylic acid; f) removal of secondary components comprised in the secondary component stream in the dissociation column; g) discharge of monomeric acrylic acid as gas mixture with introduced circulating stripping gas stream from the dissociation column; and h) feeding-in of the gas mixture to the absorption column.
Public/Granted literature
- US20160090347A1 PROCESS AND PLANT FOR RECOVERING ACRYLIC ACID Public/Granted day:2016-03-31
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