Patent ID: 7671197

Claim:
Process for the purification of meloxicam comprising the following steps: a) the meloxicam is treated in crude form with an alcohol solution of an alkaline alcoholate at a temperature between 25 and 35° C., b) the solution obtained in step (a) is acidified to a pH between 1.5 and 4.0 and the precipitated product composed of meloxicam is filtered, c) the wet filtered product obtained from the previous step is crushed in a polar aprotic solvent according to the following sub-steps: 1) the meloxicam is crushed at ambient temperature, 2) the mixture is heated to the boiling point of the solvent, 3) the mixture is kept at the above-mentioned temperature for about 1 hour and is then cooled to ambient temperature; and the product of the crushing is isolated by means of filtration and drying.