Method for producing crystals from solutions
AssigneeFrounhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsUlrich Teipel, Ulrich Förter-Barth
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Abstract
The invention relates to a method for producing crystals from thermally sensitive solids. According to this method, the solid is dissolved in at least one solvent and the solution is concentrated by drawing off the solvent to beyond the saturation concentration of the solid, so that crystallized solids are formed. The solvent is caused to permeate a substantially semi-permeable membrane, preferably by being subjected to excess pressure. The inventive method can be carried out substantially isothermally in order to prevent the thermally sensitive crystals from being damaged.
Claims23
A method for producing crystals from a thermally sensitive solid, the method comprising the steps of:
- a) dissolving the solid in at least one solvent;
- b) permeating, following step a), the solvent through at least one substantially semi-permeable membrane means;
- c) continuing step b) to concentrate the solution by drawing off the solvent to beyond a saturation concentration thereof to form a crystallized solid;
- and
- d) producing at least one of a propellant in crystal form, an explosive in crystal form, and a homeopathic effective substance in the form of crystals.
Dependencies are inferred from the claim text.