METHOD OF CLEANING CONDENSATE OF PYROLYSIS PROCESS DILUTION STEAM Russian patent published in 2002 - IPC

FIELD: chemistry of pyrolysis of hydrocarbon raw material; cleaning condensate of pyrogas dilution steam from resins, coke and dissolved hydrocarbons. SUBSTANCE: condensate of dilution steam is subjected to stepped physico-chemical treatment: (1) cleaning from dispersed admixtures through settling them by means of time milk at dose of line of 100-300 mg/l and ferrous sulfate at dose of 30-70 mg/l; (2) desorption cleaning from light hydrocarbons by means of nitrogen of air or live steam; (3) afterpurification from dissolved hydrocarbons by filtration through adsorbents (activated carbon or anionites). EFFECT: possibility of cleaning condensate to 93-98%; reduced amount of contaminated sewage. 1 tbl