Patent ID: 6023003
Filing Date: 2000-02-08
Classification: B01D,C07C,Y02P,Y10S

Abstract:
A method for recovering glycol from a mixture of glycol and water, comprising the steps of:heating the glycol and water mixture under pressure;reducing the pressure on the glycol and water mixture to initiate a flash and vaporize a portion of water from the mixture;separating the vaporized water from the remaining glycol and water mixture;heating the remaining glycol and water mixture under pressure;reducing the pressure on the remaining glycol and water mixture to initiate a flash and vaporize a portion of the water from the remaining mixture;separating the vaporized water from the more concentrated glycol and water mixture;heating the more concentrated glycol and water mixture under pressure;reducing the pressure on the more concentrated glycol and water mixture to initiate a flash and vaporize a portion of water from the more concentrated mixture; andseparating the vaporized water from the concentrated glycol stream;wherein the vaporized water from the third separation step provides the heat for the second heating step and the vaporized water from the second separations step provides the heat for the first heating step.