Patent ID: 7235183
Filing Date: 2007-06-26
Classification: B01D,C01D

Abstract:
1. A method for recovering salt from a glycerine refining process residue, comprising: a) providing a settling tank with an upper inlet through which liquid residue from a glycerine refining process is introduced into said settling tank, a conical shaped bottom onto which salt in the residue falls, and an overflow outlet positioned between the upper inlet and the bottom through which liquid is discharged; b) providing a receiving tank located below the settling tank which is arranged to receive salt from the settling tank, and c) providing a salt extractor located below the receiving tank which is arranged to receive solid material from the receiving tank and water from another source and to discharge the mixture; d) a first step of directing liquid obtained from the glycerine refining process containing salt into the upper inlet of the settling tank; e) a second step of allowing the liquid to settle in the settling tank then discharging the liquid obtained through the overflow outlet and transferring salt collected at the bottom of the settling tank to the receiving tank; f) a third step of transferring salt from the receiving tank to the extractor; and g) a fourth step of introducing water into the extractor to dilute the salt received from the receiving tank and then discharge the diluted mixture for collection.