Patent ID: 7202391
Filing Date: 2007-04-10
Classification: C07B,C07C,Y10S

Abstract:
1. A process for inhibiting polymerization of an aromatic vinyl compound which is characterized by adding (A) 2-nitrophenol compound represented by the general formula (I) together with (B) sulfonic acid compound represented by the general formula (II) to the aromatic vinyl compound during the stage of producing, purifying, storing or transporting the aromatic vinyl compound wherein A, B, C and D independently represent hydrogen, a nitro group, a carboxyl group, a hydroxyl group, or a straight or branched chain alkyl group having 1–12 carbon atoms, wherein R represents a hydroxyl group, a straight or branched chain alkyl group having 1–32 carbon atoms, an alkyl phenyl or an alkyl naphthyl group, each having at least one straight or branched chain alkyl group having 1–32 carbon atoms.