CORROSION INHIBITOR FOR PROTECTION OF PETROLEUM PRODUCTION EQUIPMENT IN DOUBLE PHASE HYDROGEN SULFIDE CONTAINING MEDIA Russian patent published in 1997 - IPC

FIELD: protection of petroleum and gas production equipment from corrosion and corrosive-mechanical disintegration, more specifically corrosion inhibitors. SUBSTANCE: corrosion inhibitor for protection of petroleum and gas production equipment in two phase hydrogen sulfide containing media comprises, wt.-%: 23.2-25.4 of condensation product which is mixture of 1-diethylenediamino-2-alkyl (alkylene)-2- imidazolines and monoamides which include alkyloyl (alkylenoyl) triethylene tetraamines and alkyloyl (alkylenoyl) 1,4-di(2-aminoethyl) piperazines at imidazoline to monoamide weight ratio of 2.7-3.0):1, respectively; 4.6-6.8 of acetone; and up to 100 aromatic hydrocarbon and degree of unsaturation of 37.5-52.3 J₂/100 g. Use of inhibitor makes it possible to increase service time of pipelines and pumps for transferring aggressive liquid without replacing spare parts, reduce number of emergencies and improve ecological situation on oil fields. EFFECT: improved properties of corrosion inhibitor. 1 tbl