PROCEDURE OF TRANSFORMER OIL DEGRADATION ON THE BASIS OF POLYCHLORINATED BIPHENYLS BY OLEUM

• Main Authors: SIMIC, MILOS, CVETKOVIC, OLGA, MANOJLOVICAGAN, MIODRAGOVIC, ZORAN, MANDIC, SNEZANA
• Format: Patent
• Language: English; Serbian
• Published: 31.12.2010
• Subjects: CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS; CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMISTRY; CRACKING HYDROCARBON OILS; FIRE-FIGHTING; FUELS; HUMAN NECESSITIES; LIFE-SAVING; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

Postupak degradacije transformatorskog ulja na bazi polihlorovanih bifeniia oleumom, naznačen time, što se u prvoj fazi, u anhidrovano gvožđe(II)-suifat dodaje transformatorsko ulje, što je maseni odnos anhidrovanog gvožđe(II)-sulfata i transformatorskog ulja je 1:0,85; sulfonuje oleumom sa 60% sumpor(VI)-oksida, stoje maseni odnos transformatorskog ulja i oleuma je 1 : 5, što reakcija traje do 90 min., dajući proizvode koji sadrže oko 1 ppm PCB stepen degradacije je 99,9981%; što se u drugoj fazi, reakcijom proizvoda iz prve faze sa kalcijum-hidroksidom, koji se dodaje do pH približno 7, posle kontakta od 24 sata, postiže stepen degradacije 99,99975%, a produžavanjem kontakta do deset dana obezbeđuje potpuna degradacija. Degradation procedure of transformer oil based on polychlorinated biphenyl (Aroclor 1260) oleum in the presence of iron sulphates is carried out in two stages. The first stage of degradation procedure, that includes sulphatation of the mixture of transformer oil in the presence of iron(II)-sulphate, distinctive according to the simplicity of procedure, a slight energy consumption and efficiency of degradation up to 99,9981%. At the next procedural stage, carried out with mixing of products of the first stage with calcium-hydroxide achieves extraordinary efficient degradation (99,99975%), implying herewith possibility of a safe laying off of degradation products (concentration 0,300-0,675 ppm) into environment. By increasing a contact time with calcium-hydroxy up to ten days a complete degradation procedure is achieved.