C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 69/54 (2006.01) C07B 63/02 (2006.01) C07C 67/48 (2006.01)
Patent
CA 2125385
Abstract of the Disclosure Disclosed is a process for the isolation of pure, substantially neutral, low-volatile organic compounds comprising reactive double bonds from a feedstock which contains said compounds in combination with minor amounts of acidic reaction components and/or corresponding auxiliary materials in a liquid phase, said process comprising the steps of neutralization, removal of the resulting salts and recovery of pure products which even without distillation exhibit low residual acid values in combination with low color values, by using finely powdered oxides, carbonates and/or hydroxides of the alkali metals and/or alkaline earth metals (neutralizing agents) and the subsequent separation of the organic li- quid phase from the resulting solid phase. A process according to the invention is characterized in that the step of neutraliza- tion is effected as follows: - Addition of the solid neutralizing agent to the hot feedstock, said neutralizing agent being used in an at least stoichiometric amount, relative to the acid value of the feedstock; - addition, at the same time or thereafter, of a limited amount of water to the reac- tion mixture; - neutralization by mixing for a period of at least some minutes; - distilling off the water from the hot reaction mixture under reduced pressure, and - removal from the liquid product of the solid phase now present. In a particular embodiment the teaching according to the invention relates to the use of said process for an exchange of inhibitors in a mixture reactive when initiated by free radicals, wherein a preparation inhibitor capable of undergoing a salt formation with bases is exchanged for application inhibitors that are subject to free choice with respect to kind and amounts thereof.
Ortanderl Stefanie
Ritter Wolfgang
Borden Ladner Gervais Llp
Henkel Kommanditgesellschaft Auf Aktien
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