FIELD: chemistry.
SUBSTANCE: invention relates to method of decomposing coagulated and flocculated sludge, formed after processing utilised emulsion cutting fluids, where in order to reduce pH phosphoric acid is used; its application results in formation of flocculated material, and includes the following stages: dosed introduction of anionogenic SAS in the process of sludge loading in order to accelerate processes of degassing, extraction; depolymerisation of polyphosphate compounds is realised with concentrated sulfuric acid, application of which is accompanied by additional exothermic and water-binding effect, accelerating depolymerisation; extraction of oil-containing organic fraction with compatible with it solvents both simple and compound having minimal miscibility with water; and it is permissible to carry out depolymerisation and extraction, with successive supply of each reagent and step-by-step output of formed water and organic phases from reaction reservoir.
EFFECT: provision of high efficiency of decomposition of sludge, formed after processing of utilised emulsion cutting fluids, considerable reduction of ecologically hazardous and non-technological wastes.
1 ex, 1 dwg
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