WASHING LIQUID FOR FIGHTING SEDIMENTS AND PROLONGATION OF SERVICE TERM OF HEATING SYSTEM PIPELINES (VERSIONS)

摘要

FIELD: chemistry.;SUBSTANCE: claimed washing liquids for heating systems contain either solution of 1-3% citric acid, 0.03-0.05 wt % of hydrochloric acid and 0.05-0.5 wt % of chitosan, modified with isobutyric acid, containing methylpyrazole group (chitosan methyl pyrazolyl isobutyrate - CMPI), or 1-3 wt % of citric acid, 0.1-0.15 wt % of sulfuric acid and 0.05-0.05 wt % of chitosan, modified with isobutyric acid, containing methylpyrazole group (chitosan methyl pyrazolyl isobutyrate - CMPI), water - the remaining part.;EFFECT: effective purification of pipelines, prolongation of service term of heating systems and protection of steel pipelines against corrosion.;2 cl