METHOD OF RECYCLING ACID TAR AND USED ABSORBING OIL Russian patent published in 2020 - IPC C08F240/00 

FIELD: chemistry.

SUBSTANCE: invention relates to wastes chemical by-product processing. Described is a method of recycling an acidic resin and spent absorbing oil, obtaining high quality of hot polymer-containing mastic and an absorption oil suitable for trapping benzene from coke gas, involving introduction of neutralizing or initiating reagents, thermal treatment of obtained mixture with separation of volatile products and separation of water-hydrocarbon fraction, in which acidic resin is mixed with spent absorption oil heated up to 200 °C, to said mixture lime-dust of lime is added to pH = 7.0…8.0, at temperature of 270…275 °C, the resulting suspension is isolated from water and a hydrocarbon fraction which is condensed vapors to give wash oil, until the obtained oil density 1.055 g/cm³, then remaining suspension is transferred into intermediate reservoir, in which it is cooled to temperature of 140…150 °C, adding service water and producing said hot mastic containing high strength gypsum, wherein quantitative composition of reagents is equal to, wt. %: sour resin - 40 %; used waste oil - 40 %; lime-dust mist - 10…12 %; process water - 8…10 %.

EFFECT: technical result is processing of production wastes.

1 cl, 2 tbl, 2 ex, 1 dwg