Forward osmosis system comprising solvent separation by means of membrane distillation
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United States of America Patent
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May 23, 2017
Grant Date -
Oct 10, 2013
app pub date -
Oct 6, 2011
filing date -
Nov 10, 2010
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Abstract
The invention relates to a system for separating a product contained as solvent in a solution to be processed, comprising at least one forward osmosis device (816) through which the solution to be processed and a draw solution flow, and a device connected downstream thereof for obtaining the product (56, 62) from the diluted draw solution exiting the forward osmosis device, wherein the forward osmosis device comprises at least one flow channel conducting the solution to be processed and at least one flow channel conducting the draw solution, the inner space of a respective flow channel conducting the solution to be processed is delimited at least partially by a semi-permeable membrane wall that is permeable to the solvent of the solution to be processed but not to the substance dissolved therein, and at least one flow channel conducting the draw solution is delimited on opposite sides by membrane walls that are associated with two adjoining flow channels conducting the solution to be processed, such that solvent from the solution to be processed passes through the membrane walls into the adjoining flow channels conducting the draw solution.
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