| abstract |
A process for inhibiting the undesired radical polymerization of acrylic acid present in a liquid phase P, the acrylic acid content of which is at least 10% by weight and, based on the weight of the acrylic acid contained in it, additionally at least 100 ppm by weight of propionic acid and at least 100% by weight ppm of glyoxal, in which at least one chemical compound of the element copper is added to the liquid phase P, and the resulting liquid phase P. resulting from a chemical compound of the element copper. |