METHOD OF DEACTIVATING SOLID ORGANIC SUBSTRATE CONTAMINATED WITH SOLID RADIOACTIVE DISPERSED INORGANIC CONTAMINANTS USING DENSELY COMPRESSED CO Russian patent published in 2011 - IPC B08B7/00 B08B3/10 G21F9/28 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of removing radioactive contaminants. The method of deactivating and cleaning a solid organic substrate contaminated with solid radioactive dispersed inorganic contaminants, in which the substrate is brought into contact with a water-free extraction medium, containing: densely compressed CO₂; non-halogenated surfactant selected from block-copolymers of polyethylene oxide PEO and polypropylene oxide PPO, such as double-block copolymers (EO)_x-(PO)_y, tri-block copolymers (EO)_x-(PO)_y-(EO)_x and tri-block copolymers (PO)_x-(EO)_y-(PO)_x, where x and y are integers from 2 to 80, where x is not equal to y, and polydi(from 1 to 6 C)alkylsiloxane, such as polydimethylsiloxane (PDMS); a complexing agent selected from tributylphosphate (TBP), crown ethers, tributylphosphine oxide, triphenylphosphine oxide; and tri(n-octyl)phosphine oxide; and a substrate and/or extraction medium are subjected to mechanical action simultaneously with the contact operation.

EFFECT: invention provides satisfactory deactivation of substrates and prevents repeated contamination.

28 cl, 5 dwg, 4 tbl, 7 ex