METHOD FOR PERFLUOROPOLYMER-CONTAINING MINERAL HEMESORBENT PRODUCING Russian patent published in 1998 - IPC

FIELD: medicine, sorbents. SUBSTANCE: method involves vacuum treatment of mineral sorbent at 277 ± 0.5 C, addition of tetrafluoroethylene (10-40 weight%) followed by keeping at room temperature for 5-8 h up to uniform adsorption of tetrafluoroethylene. Then sorbent is frozen to liquid nitrogen temperature at the rate 2-4 degrees/min, irradiated by gamma-radiation source at dose 2-8 Mrad, frozen out to the room temperature, unreacted monomer is removed and treated additionally with perfluoroolefin taken from order CF₂= CF-R where R - perfluoroalkyl. After pressure drop an excess of perfluoroolefin is removed at 127 ± 1 C. Perfluoropolymeric coating is made on surface of solid porous mineral sorbent which is uniformly distributed on surface of mineral hemesorbent and bound chemically with its. Mineral hemesorbent modified with perfluoropolymer can be used for hemesorption, lymphosorption, plasmasorption and enterosorption. Modified hemesorbents do not damage blood cells and do not form dust particles. EFFECT: improved method of producing, high specific surface and high quality of sorbent. 1 tbl, 1 dwg