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US 2002/0152629 A1Published application
Process for removing trace solvent from a material
AssigneePfizer Science and Technology Ireland Limited
InventorWilliam Tully
Life of this patent
Estimating the term…
Abstract
An improved process for removing trace solvent from a material comprises rewetting the product with water during the drying process. Finished products such as suramin are produced efficiently to a high quality on a factory scale.
Claims14
A factory scale process for removing trace solvent from a material comprising the steps of:
- (a) providing a dryer;
- (b) drying an isolated product in a dryer to remove free solvent;
- (c) rewetting the product with water;
- and
- (d) redrying the product to remove residual solvent to the required level.
2 more elements
Dependencies are inferred from the claim text.