| abstract |
The invention discloses a kind of method that in Synthetic Leather waste gas, Organic substance reclaims.It uses ionic liquid, liquid esters to be special absorptive agent, in absorption tower, by the way of low temperature sprays, the synthetic leather waste gas after upstream cooling is processed, after Organic substance toluene, butanone and DMF in waste gas is absorbed by low temperature absorption agent, it is introduced into desorber and carries out Desorption separation recovery toluene, butanone, then reclaim DMF by vacuum distillation tower Desorption separation；Containing ionic liquid 50 70%, dibutyl terephthalate 5 25%, butylene terephthalate 15 25%, ethylene m-phthalate 5 15% in this special absorptive agent；This special absorptive agent boiling point is higher than 300 DEG C, it is adaptable to absorb toluene, butanone and DMF.The method can high efficiente callback DMF and toluene, organic efficiency is high, and the DMF purity being recovered to is more than 99%, and the toluene that is recovered to, butanone low-boiling-point organic compound purity are more than 99.5%. |