METHOD OF INHIBITING POLYMERIZATION OF VINYLCYCLIC AND ALKYLVINYLCYCLIC COMPOUNDS

• Main Authors: BELOKUROV V.A, PATANOVA I.M, PAVLOV S.JU, SEREBRJAKOV B.R, MUSTAFIN KH.V, BOREJKO N.P, KARPOV O.P, SUROVTSEV A.A, BESPALOV V.P, GALIEV R.G, MELEKHOV V.M, ZUEV V.P
• Format: Patent
• Language: English
• Published: 20.10.1999
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

FIELD: chemical technology, more particularly recovery of vinylcyclic and alkylvinylcyclic compounds from mixtures and/or purification by rectification. SUBSTANCE: method in carried out by adding polymerization inhibitor based on tetramethylpiperidyl-4-fulvene N-oxide dimer or its solution. Inhibitor is product prepared by oxidation of mixture comprising at least -tetramethyl-4- oxopiperidine and -tetramethylpiperidyl-4-fulvene dimer. Inhibitor has the following components (wt %): -tetramethyl-4-oxopiperidine-1-oxyl, 15-70; di( )- tetramethyl-4-oxopiperidyl-4-fulvene-1-oxyl, 12-65; - tetramethyl-4-oxopiperidine, 2-8; di-( -tetramethyl-4- oxopiperidyl-4-dulvene, 4-11); di- -tetramethyl- piperidyl-4-furene-1-hydroxy, 1-3; and oxygen and/or nitrogen-containing and/or hydrocarbons, 3.5-10. Inhibitor is used in concentrated form or as solution in organic solvent. Said inhibitor is used to inhibit polymerization of styrene and/or alkylvinyl-pyridines and/or mixtures thereof with other agents at temperatures of not higher than 140 C, preferably up to 120 C. EFFECT: greater economic efficiency due to smaller amounts of polymer and reduced power consumption. 3 cl, 4 ex, 1 tbl