COMPOSITION FOR INHIBITING OF STYRENE THERMOPOLYMERIZATION AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2006 - IPC C07C7/20 C08F2/42 

FIELD: petroleum chemistry, polymers, in particular styrene production.

SUBSTANCE: invention relates to method for production of phenol-based co-inhibitor of styrene thermopolymerization comprising acid condensation reaction of by-product-coking phenols containing mono- and dihydric phenols in mass ratio (1.3-2):1, with sulfuric acid at elevated temperature followed by catalytic oxidation of obtained phenol oligomer with hydrogen peroxide and neutralization of acid catalyst with sodium nitrite to produce modified product, wherein component ratio (mass pts) of extractive (total) by-product-coking phenols:sulfuric acid:hydrogen peroxide:sodium nitrite is 100:1.5-2.0:30-33.0:2.1-2.8. Also described is two-component composition for inhibiting of styrene thermopolymerization containing Mannich's base and co-inhibitor in mass ratio of 1:(1-2), wherein as co-inhibitor composition contains modified product of by-product-coking phenols.

EFFECT: effective inhibitor with good solubility in treated product; enhanced assortment of inhibitors.

3 cl, 2 tbl, 18 ex