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US 2014/0155654 A1Published application
Forming Spherical Crystal Habit
AssigneePhysical Sciences, Inc.
InventorsDorin V. Preda, Prakash B. Joshi, Anait (Tsinberg) Scherer, Laurel A. Vernarelli
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Abstract
Methods for forming spherical crystal habit are shown. A needle-shaped crystal habit, a solvent, and a surfactant are combined and dissolved forming a first solution. The first solution and an anti-solvent are combined forming a second solution. The second solution is cooled. Spherical crystal habit is formed.
Claims24
A method of forming a spherical crystal habit, the method comprising:
- forming a first solution by combining a needle-shaped crystal habit, a solvent, and a surfactant;
- dissolving the needle-shaped crystal habit by heating the first solution to a desired temperature;
- forming a second solution by combining the first solution with an anti-solvent;
- and
- cooling the second solution.
2 more elements
A method of forming a spherical crystal habit, the method comprising:
- forming a first solution by combining a needle-shaped crystal habit, a solvent, and a surfactant;
- agitating the first solution by shaking, stirring, manually combining, mechanically combining, or any combination thereof;
- dissolving the needle-shaped crystal habit by uniformly distributing heat to the first solution at a desired temperature of at least 80° C.;
- cooling an anti-solvent by freezing, refrigerating, maintaining at room temperature, or any combination thereof;
- forming a second solution by combining the first solution with the anti-solvent;
- agitating the second solution by shaking, stirring, manually combining, mechanically combining, or any combination thereof;
- and
- cooling the second solution by freezing, refrigerating, maintaining at room temperature, or any combination thereof.
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A spherical crystal habit nitroguanidine formed by the process of:
- forming a first solution by combining a needle-shaped crystal habit, a solvent, and a surfactant;
- dissolving the needle-shaped crystal habit by heating the first solution to a desired temperature;
- forming a second solution by combining the first solution with an anti-solvent;
- and
- cooling the second solution.
2 more elements
Dependencies are inferred from the claim text.