A method of removing water from a composition of matter comprises
contacting a first composition of matter comprising water with a second
composition of matter comprising: (1) at least one surfactant comprising
at least one phosphate group and (2) a solvent comprising carbon dioxide,
wherein at least a portion of the surfactant is soluble in the solvent,
such that the at least one surfactant removes at least a portion of the
water from the first composition.