Patent ID: 11912591
Assignee: nan
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A water treatment system for separating dissolved salts from a feed stream comprising:
an inlet feed stream comprising dissolved salts;
an inlet brine stream comprising at least 60 wt. % ethanol and/or isopropanol;
an electrodialysis unit configured to remove the dissolved salts from the inlet feed stream and add the dissolved salt to the inlet brine stream to form an outlet brine stream;
a precipitation tank configured to precipitate the dissolved salts out of the outlet brine stream from the electrodialysis unit, wherein the precipitation tank comprises a flash valve configured to flash off a fraction of the solution of outlet brine stream as vapor;
a supernatant brine stream from the precipitation tank comprising at least 60 wt. % ethanol and/or isopropanol, wherein the supernatant brine stream is sent to the electrodialysis unit to be at least a portion of the inlet brine stream;
a distillation column configured to receive the vapor from the precipitation tank and generate a vapor stream comprising a higher concentration of ethanol and/or isopropanol than the vapor from the precipitation tank; and
a condenser configured to condense the vapor stream from the distillation column, wherein the condensed vapor stream is sent to the electrodialysis unit to be at least a portion of the inlet brine stream.