Methods for treating a liquid using draw solutions

摘要

Draw solutions comprising at least one N-cyclicalkyl-cycloalkylamine and a secondary solvent. The N-cyclicalkyl-cycloalkylamine comprises the chemical structure:;
wherein n is 0, 1, or 2, n′ is 0, 1, or 2, and each of R1-R6 is independently selected from the group consisting of an alkyl group, an alkoxy group, an acetyl group, an aryl group, a hydrogen group, a hydroxyl group, and a phosphorus-containing group. Methods of treating a liquid using the draw solution are also disclosed.

主权项

1. A method of treating a liquid, the method comprising:
converting a draw solution comprising at least one N-cyclicalkyl-cycloalkylamine in a nonpolar form into a draw solution comprising the at least one N-cyclicalkyl-cycloalkylamine in a polar form; contacting one side of a membrane with the draw solution comprising the at least one N-cyclicalkyl-cycloalkylamine in the polar form and an opposite side of the membrane with a feed liquid comprising at least one solvent and at least one solute; and osmosing the at least one solvent of the feed liquid across the membrane and into the draw solution to form a diluted draw solution and a concentrated feed liquid.