Invention Grant
- Patent Title: Process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P
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Application No.: US13253245Application Date: 2011-10-05
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Publication No.: US09096513B2Publication Date: 2015-08-04
- Inventor: Till Blum , Peter Zurowski , Tobias Johannes Korn , Sylke Haremza , Thorsten Friese , Friedrich-Georg Martin , Ulrich Jäger , Steffen Rissel , Volker Schliephake
- Applicant: Till Blum , Peter Zurowski , Tobias Johannes Korn , Sylke Haremza , Thorsten Friese , Friedrich-Georg Martin , Ulrich Jäger , Steffen Rissel , Volker Schliephake
- 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: DE102010042216 20101008
- Main IPC: C07C51/50
- IPC: C07C51/50
Abstract:
A process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P whose acrylic acid content is at least 10% by weight and which, based on the weight of the acrylic acid present therein, additionally comprises at least 100 ppm by weight of propionic acid and at least 100 ppm by weight of glyoxal, in which at least one chemical compound of the element copper is added to the liquid phase P, and the resulting liquid phases P to which a chemical compound of the element copper has been added.
Public/Granted literature
- US09212122B2 Process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P Public/Granted day:2015-12-15
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