Patent ID: 8545704
Filing Date: 2013-10-01
Classification: C02F

Abstract:
1. A method for recovering amine from amine-containing waste water, comprising: capturing amine from amine-containing waste water with cation exchange resins; eluting the amine captured in the cation exchange resin (S sensing a pH value and a conductivity value of the eluate stream; diverting the eluate stream to an amine recovery tank ( diverting the eluate stream to a low purity amine storage tank ( performing distillation of the low purity amine stream at a temperature of 150° C. or lower under a pressure of 100 mmHg or lower (S condensing the gas stream to produce a condensate stream; sensing a pH value and a conductivity value of the condensate stream; diverting the condensate stream to the amine recovery tank ( diverting the condensate stream to a water emission area when the condensate stream has a pH value of 7 or lower and a conductivity value less than 10 μs/cm indicative of water.