METHOD OF PURIFYING WATER, OBTAINED IN FISCHER-TROPSCH PROCESS Russian patent published in 2008 - IPC C02F9/14 C02F101/32 

FIELD: chemistry.

SUBSTANCE: purified water is a water stream, with COD ranging from 20 to 500 mg/l, pH ranging from 6.0 till 9.0. Content of the above mentioned solid substances is less than 250 mg/l and the overall content of soluble solid substances is less than 600 mg/l. The method involves a primary treatment stage, which involves distillation to remove, at least, part of non-acidic oxygen containing hydrocarbons from the reaction Fischer-Tropsch water with obtaining primary enriched water stream; secondary treatment, involving extraction of the liquid for removal of at least, part of organic acids from at least, part of the primary enriched water stream with obtaining secondary enriched water stream; tertiary treatment, involving biological treatment for removal of at least, part of acidic oxygen containing hydrocarbons from at least, part of the secondary enriched water stream with obtaining of tertiary enriched water stream; and quaternary treatment, involving separation of the solid substances and liquid for removal of at least, part of the tertiary enriched water stream.

EFFECT: obtaining pure water with provision for further use.

25 cl, 1 dwg, 3 tbl, 1 ex