申请人:Allegrini Pietro
                            
                            
                                公开号:US20100256411A1
                            
                            
                                公开(公告)日:2010-10-07
                            
                            The present invention relates to a method for purifying naproxcinod comprising the steps of:
a) dissolving or dispersing a mixture containing naproxcinod in an amount higher than 90% by weight in a solvent;
b) cooling the solution or two phases dispersion under stirring to a temperature ranging from −20° C. to 10° C.
c) optionally seeding the solution with crystals of naproxcinod
d) stirring, by maintaining the temperature in the range from −40° C. to 10° C.
e) collecting the formed solid by maintaining the temperature under 15° C.
A further object of the invention is a crystalline form of naproxcinod.
                            本发明涉及一种纯化Naproxcinod的方法,包括以下步骤:
a)在溶剂中溶解或分散含有90%以上Naproxcinod的混合物;
b)在搅拌下将溶液或两相分散体冷却到-20℃至10℃的温度范围内;
c)可选地将Naproxcinod的晶体作为种子加入溶液中;
d)保持温度在-40℃至10℃的范围内搅拌;
e)通过保持温度低于15℃来收集形成的固体。
本发明的另一个目的是提供Naproxcinod的晶体形式。