Crystal forming and melting by varying applied pressure

Claim 1

PROCESS FOR SEPARATING IN THE ABSENCE OF ANY VAPOR PHASE A NONEUTECTIC LIQUID MIXTURE INTO AT LEAST TWO COMPONENTS HAVING DIFFERENT FREEZING POINTS, CHARACTERIZED BY THE STEPS OF ALTERING THE EXTERNAL PRESSURE ON SAID LIQUID MIXTURE BY AN AMOUNT SUFFICIENT TO PRODUCE A SUBSTANTIAL CHANGE IN THE FREEZING POINT OF SAID LIQUID MIXTURE THEREBY TO FORM A SOLID PHASE AND A RESIDUAL LIQUID, DISPLACING AT LEAST A PORTION OF SAID RESIDUAL LIQUID WITH A LIQUID THE COMPOSITION OF WHICH IS MORE NEARLY THE COMPOSITION OF SAID SOLID PHASE WHILE MAINTAINING SAID SOLID PHASE SUBSTANTIALLY IMMOBILE THEREBY TO REMOVE OCCULDED LIQUID IMPURITIES IN SAID SOLID PHASE, ALTERING THE EXTERNAL PRESSURE ON SAID MIXTURE TO CONVERT SAID SOLID PHASE TO A LIQUID, AND REMOVING THE RESULTING LIQUID COMPONENTS.