METHOD OF INHIBITION OF THE UNDESIRABLE RADICAL POLYMERIZATION, EXISTING B TO LIQUID PHASE THE P OF THE ACRYLIC ACID

摘要

1. A method of inhibiting unwanted radical polymerization of acrylic acid present in the liquid phase P, acrylic acid content which is at least 10 wt.%, And that based on the weight of acrylic acid contained in it further comprises at least 100 the weight. ppm propionic acid, and at least 100 wt. ppm glyoxal, characterized in that to the liquid phase F is added, at least one chemical compound medi.2 element. A method according to claim 1, characterized in that the at least one chemical compound containing copper oxidation level +2 +1.3. A method according to claim 1, characterized in that the at least one chemical copper compound is added in an amount providing a content of added copper in the liquid phase P, based on contained therein molar amount of acrylic acid in an amount of from 0.01 mol . ppm to 5 mol.%. 4. A method according to claim 1, characterized in that the liquid phase is added to P, at least one chemical compound of the copper partitioned dispersed and / or dissolved in the liquid phase R.5. A method according to claim 1, characterized in that the liquid phase P contains at least 1 wt.% Vody.6. A method according to claim 1, characterized in that the liquid phase based on the weight contained therein acrylic acid contained 100 wt. ppm diacrylate kisloty.7. A method according to claim 1, characterized in that the liquid phase contained in F is a product acrylic acid heterogeneously catalyzed partial oxidation of the C-precursor compound of acrylic acid, wherein used for the partial oxidation of the C-containing precursor compound in the feed gas mixture based on contained therein molar