C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 57/07 (2006.01) C07C 51/44 (2006.01)
Patent
CA 2183673
In a process for the separation by rectification of unsaturated carboxylic acids from solvents in which the acids were absorbed after the synthesis reaction, the rectification is briefly interrupted and the rectifica- tion column is flushed with a basic solution. The interruption is carried out at regular time intervals. The basic solution used is an aqueous solution of alkali metal and/or alkaline earth metal hydroxide, preferably NaOH, KOH, Ca(OH)2 or their anhydrous oxides; alkaline polar organic solvents as amines or amides can be used, too.
Hammon Ulrich
Pies Wolfgang
Rauh Ulrich
Schliephake Volker
Basf Aktiengesellschaft
Hammon Ulrich
Pies Wolfgang
Rauh Ulrich
Robic
LandOfFree
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