Liquid-liquid phase transition compositions and processes
AssigneeSolvcor Technologies LLC
InventorEthan J. Novek
Life of this patent
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Abstract
The present application pertains to liquid-liquid phase transition compositions and processes. In one embodiment a liquid-liquid phase transition process comprises first forming a composition comprising a glycol polymer and water and then phase transitioning the composition at or above the composition's cloud point temperature to form at least two liquid phases. The enthalpy of liquid-liquid phase transition may be greater than 5 kJ per kg as measured by a calorimeter and each liquid phase may have unique and advantageous properties. In another embodiment the application pertains to compositions suitable for liquid-liquid phase transition compositions.
Claims17
A liquid-liquid phase transition composition comprising:
- a solvent;
- a glycol polymer;
- and
- a glycol ether selected from an alkylene glycol alkyl ether, a dialkylene glycol alkyl ether, a trialkylene glycol alkyl ether, an alkylene glycol dialkyl ether, or any combination thereof wherein alkyl is a C1-C6 alkyl;
- wherein enthalpy of a liquid-liquid phase transition is greater than 5 kJ per kg as measured by a mixing calorimeter;
- wherein the glycol polymer is less than about 18% by weight of the composition.
A glycol polymer composition comprising:
- from about 1 to about 80 percent by weight of total composition of at least one polypropylene glycol having a number average molecular weight greater than or equal to 2,000 and less than or equal to 3,000;
- from about 1 to about 99 percent by weight of total composition of water;
- wherein
- (1) the composition comprises a single liquid phase combined solution at a temperature below 5° C.;
- and
- (2) enthalpy of liquid-liquid phase transition is greater than 5 kJ per kg as measured by a mixing calorimeter;
- wherein the composition further comprises from about 0.5 to about 50 percent by weight of a glycol ether selected from an alkylene glycol alkyl ether, a dialkylene glycol alkyl ether, a trialkylene glycol alkyl ether, an alkylene glycol dialkyl ether, or any combination thereof wherein alkyl is a C1-C6 alkyl;
- wherein the cloud point temperature of the composition is less than about 18° C.
A glycol polymer composition comprising:
- from about 20 to about 25 percent by weight of total composition of at least one polypropylene glycol;
- and
- water;
- wherein the enthalpy of liquid-liquid phase transition is greater than 20 kJ per kg as measured by a mixing calorimeter and wherein the cloud point temperature of the composition is less than about 18° C.;
- wherein the composition further comprises greater than 0 up to about 5 percent by weight of a dialkylene glycol alkyl ether wherein alkyl is a C1-C6 alkyl.
Dependencies are inferred from the claim text.