FIELD: ecology; chemical decontamination of steady organic contaminants; decontamination and utilization of electrical equipment, such as power transformers and capacitors.
SUBSTANCE: proposed method is based on oleum sulfurizing followed by treatment of sulfonic acids and free sulfuric acid with triethanol amine till complete neutralization; sulfurizing is carried out at the following mole ratio of polychloro biphenyls: sulfuric anhydride in oleum equal to 1:1 to 1.3 at temperature of 50-90C for 2-2.5 h. Concentration of sulfuric anhydride in oleum used for sulfurizing ranges from 17 to 60 mass-%.
EFFECT: reduced power requirements due to lowered temperature and reduced duration of process.
5 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF STRIPPING OF THE ELECTRICAL EQUIPMENT FROM THE MIXTURE OF POLYCHLOROBIPHENYLS AND TRICHLOROBENZENES | 2006 |
|
RU2314881C1 |
| METHOD OF DECONTAMINATING MIXTURE OF POLYCHLOROBIPHENYLS AND POLYCHLOROBENZENES | 2009 |
|
RU2433113C2 |
| METHOD OF SOVTOL DETOXICATION | 2007 |
|
RU2341509C1 |
| PROCESS FOR DECONTAMINATION OF MIXTURE OF POLYCHLOROBENZENES AND POLYCHLOROBIPHENYLS | 1994 |
|
RU2076090C1 |
| FIRE RETARDANT AND METHOD OF PRODUCTION THEREOF | 2006 |
|
RU2344141C2 |
| METHOD FOR RENDERING HARMLESS MIXTURE OF POLYCHLOROBENZENES AND POLYCHLOROBIPHENYLS | 2003 |
|
RU2231518C1 |
| FIRE RETARDANT AND METHOD OF PRODUCTION THEREOF | 2006 |
|
RU2344142C2 |
| METHOD FOR DETOXIFYING POLYCHLOROBIPHENILS | 2003 |
|
RU2266890C2 |
| FIRE RETARDANT AND METHOD OF RECEPTION THEREOF | 2006 |
|
RU2344140C2 |
| METHOD FOR DETOXIFICATION OF POLYCHLOROBIPHENILS | 2002 |
|
RU2233829C2 |
