METHOD FOR ADDITIONAL STABILISATION OF HIGHLY CONCENTRATED HYDROGEN PEROXIDE FOR ITS PRESERVATION AND TRANSPORTATION IN STAINLESS STEEL RESERVOIRS

摘要

FIELD: chemistry.SUBSTANCE: invention relates to chemical industry. Method consists in the fact that nitriletrimethylphosphonic acid in amount 0.01-0.05% is introduced as additional stabiliser into solutions of highly concentrated hydroxide peroxide, which contain sodium pyrophosphate and sodium stannate as stabiliser and ammonium nitrate as corrosion inhibitor. To reduce roughness internal surface of stainless steel grade 12X18H10T reservoirs is preliminarily polished. Quality of processing is estimated by formation of mirror reservoir surface. After that, internal reservoir surface is passivated by surface defatting, acid etching with further washing with hot and cold water and 24-hour exposure in solution of highly-concentrated hydrogen peroxide, containing nitriletrimethylphosphonic acid in amount twice larger than required for additional stabilisation.EFFECT: invention makes it possible to provide long-term storage of highly-concentrated hydrogen peroxide and transport it in stainless steel reservoirs.2 tbl, 4 ex