METHOD OF INHIBITING PROCESS OF THERMOPOLYMERIZATION AND RESIN FORMATION OF UNSATURATED HYDROCARBONS Russian patent published in 1998 - IPC

FIELD: chemical industry. SUBSTANCE: claimed method is useful in process of thermopolymerization of resin formation of unsaturated hydrocarbons in deethanization and depropanization columns in the process of separation of products of pyrolysis of hydrocarbons by multi-step rectification by adding inhibitor. The inhibitor includes product resulting from oxidizing 2,2′,6,6′- tetramethyl-4-oxopiperidine and comprising 55-92% 2,2′,6,6′ tetramethyl-4-oxopiperidine-1-oxyl; 4-35 % 2,2′,6,6′- tetramethyl-4-oxopiperidine; 1-8% 2,2′,6,6′-tetramethyl-1- hydroxy-4-oxopiperidine; and 1-9% admixtures. Inhibitor is used in amount of 0.005-0.3% (preferably 0.01-0.1%) by weight on initial hydrocarbon mixtures admitted into depropanization and deethanization columns. The inhibitor includes solution of said oxidation product in organic solvent. EFFECT: more efficient method and improved economic characteristics. 2 cl, 1 tbl