Method for preparing spherical Clopidogrel Hydrogen Sulfate polymorph I
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United States of America Patent
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Nov 14, 2017
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Dec 31, 2014
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Dec 31, 2014
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Abstract
This invention provides a new preparation method of Clopidogrel Hydrogen Sulfate spherical crystal form I, using single 2-butanol as solvent, controlling the concentration, addition way and addition speed of sulfuric acid used to salify to shorten the process time, thus separating out Clopidogrel Hydrogen Sulfate from solution system stably with spherality. And the Clopidogrel Hydrogen Sulfate obtained complies with the requirements of the follow-up process on residual solvent, bulk density and mobility.
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